flectra/addons/web/static/lib/nvd3/nv.d3.js

/* nvd3 version 1.8.2-dev (https://github.com/novus/nvd3) 2016-02-08 */
(function(){

// set up main nv object
var nv = {};

// the major global objects under the nv namespace
nv.dev = false; //set false when in production
nv.tooltip = nv.tooltip || {}; // For the tooltip system
nv.utils = nv.utils || {}; // Utility subsystem
nv.models = nv.models || {}; //stores all the possible models/components
nv.charts = {}; //stores all the ready to use charts
nv.logs = {}; //stores some statistics and potential error messages
nv.dom = {}; //DOM manipulation functions

// Node/CommonJS - require D3
if (typeof(module) !== 'undefined' && typeof(exports) !== 'undefined' && typeof(d3) == 'undefined') {
    d3 = require('d3');
}

nv.dispatch = d3.dispatch('render_start', 'render_end');

// Function bind polyfill
// Needed ONLY for phantomJS as it's missing until version 2.0 which is unreleased as of this comment
// https://github.com/ariya/phantomjs/issues/10522
// http://kangax.github.io/compat-table/es5/#Function.prototype.bind
// phantomJS is used for running the test suite
if (!Function.prototype.bind) {
    Function.prototype.bind = function (oThis) {
        if (typeof this !== "function") {
            // closest thing possible to the ECMAScript 5 internal IsCallable function
            throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
        }

        var aArgs = Array.prototype.slice.call(arguments, 1),
            fToBind = this,
            fNOP = function () {},
            fBound = function () {
                return fToBind.apply(this instanceof fNOP && oThis
                        ? this
                        : oThis,
                    aArgs.concat(Array.prototype.slice.call(arguments)));
            };

        fNOP.prototype = this.prototype;
        fBound.prototype = new fNOP();
        return fBound;
    };
}

//  Development render timers - disabled if dev = false
if (nv.dev) {
    nv.dispatch.on('render_start', function(e) {
        nv.logs.startTime = +new Date();
    });

    nv.dispatch.on('render_end', function(e) {
        nv.logs.endTime = +new Date();
        nv.logs.totalTime = nv.logs.endTime - nv.logs.startTime;
        nv.log('total', nv.logs.totalTime); // used for development, to keep track of graph generation times
    });
}

// Logs all arguments, and returns the last so you can test things in place
// Note: in IE8 console.log is an object not a function, and if modernizr is used
// then calling Function.prototype.bind with with anything other than a function
// causes a TypeError to be thrown.
nv.log = function() {
    if (nv.dev && window.console && console.log && console.log.apply)
        console.log.apply(console, arguments);
    else if (nv.dev && window.console && typeof console.log == "function" && Function.prototype.bind) {
        var log = Function.prototype.bind.call(console.log, console);
        log.apply(console, arguments);
    }
    return arguments[arguments.length - 1];
};

// print console warning, should be used by deprecated functions
nv.deprecated = function(name, info) {
    if (console && console.warn) {
        console.warn('nvd3 warning: `' + name + '` has been deprecated. ', info || '');
    }
};

// The nv.render function is used to queue up chart rendering
// in non-blocking async functions.
// When all queued charts are done rendering, nv.dispatch.render_end is invoked.
nv.render = function render(step) {
    // number of graphs to generate in each timeout loop
    step = step || 1;

    nv.render.active = true;
    nv.dispatch.render_start();

    var renderLoop = function() {
        var chart, graph;

        for (var i = 0; i < step && (graph = nv.render.queue[i]); i++) {
            chart = graph.generate();
            if (typeof graph.callback == typeof(Function)) graph.callback(chart);
        }

        nv.render.queue.splice(0, i);

        if (nv.render.queue.length) {
            setTimeout(renderLoop);
        }
        else {
            nv.dispatch.render_end();
            nv.render.active = false;
        }
    };

    setTimeout(renderLoop);
};

nv.render.active = false;
nv.render.queue = [];

/*
Adds a chart to the async rendering queue. This method can take arguments in two forms:
nv.addGraph({
    generate: <Function>
    callback: <Function>
})

or

nv.addGraph(<generate Function>, <callback Function>)

The generate function should contain code that creates the NVD3 model, sets options
on it, adds data to an SVG element, and invokes the chart model. The generate function
should return the chart model.  See examples/lineChart.html for a usage example.

The callback function is optional, and it is called when the generate function completes.
*/
nv.addGraph = function(obj) {
    if (typeof arguments[0] === typeof(Function)) {
        obj = {generate: arguments[0], callback: arguments[1]};
    }

    nv.render.queue.push(obj);

    if (!nv.render.active) {
        nv.render();
    }
};

// Node/CommonJS exports
if (typeof(module) !== 'undefined' && typeof(exports) !== 'undefined') {
  module.exports = nv;
}

if (typeof(window) !== 'undefined') {
  window.nv = nv;
}
/* Facade for queueing DOM write operations
 * with Fastdom (https://github.com/wilsonpage/fastdom)
 * if available.
 * This could easily be extended to support alternate
 * implementations in the future.
 */
nv.dom.write = function(callback) {
	if (window.fastdom !== undefined) {
		return fastdom.write(callback);
	}
	return callback();
};

/* Facade for queueing DOM read operations
 * with Fastdom (https://github.com/wilsonpage/fastdom)
 * if available.
 * This could easily be extended to support alternate
 * implementations in the future.
 */
nv.dom.read = function(callback) {
	if (window.fastdom !== undefined) {
		return fastdom.read(callback);
	}
	return callback();
};/* Utility class to handle creation of an interactive layer.
 This places a rectangle on top of the chart. When you mouse move over it, it sends a dispatch
 containing the X-coordinate. It can also render a vertical line where the mouse is located.

 dispatch.elementMousemove is the important event to latch onto.  It is fired whenever the mouse moves over
 the rectangle. The dispatch is given one object which contains the mouseX/Y location.
 It also has 'pointXValue', which is the conversion of mouseX to the x-axis scale.
 */
nv.interactiveGuideline = function() {
    "use strict";

    var margin = { left: 0, top: 0 } //Pass the chart's top and left magins. Used to calculate the mouseX/Y.
        ,   width = null
        ,   height = null
        ,   xScale = d3.scale.linear()
        ,   dispatch = d3.dispatch('elementMousemove', 'elementMouseout', 'elementClick', 'elementDblclick', 'elementMouseDown', 'elementMouseUp')
        ,   showGuideLine = true
        ,   svgContainer = null // Must pass the chart's svg, we'll use its mousemove event.
        ,   tooltip = nv.models.tooltip()
        ,   isMSIE = "ActiveXObject" in window // Checkt if IE by looking for activeX.
    ;

    tooltip
        .duration(0)
        .hideDelay(0)
        .hidden(false);

    function layer(selection) {
        selection.each(function(data) {
            var container = d3.select(this);
            var availableWidth = (width || 960), availableHeight = (height || 400);
            var wrap = container.selectAll("g.nv-wrap.nv-interactiveLineLayer")
                .data([data]);
            var wrapEnter = wrap.enter()
                .append("g").attr("class", " nv-wrap nv-interactiveLineLayer");
            wrapEnter.append("g").attr("class","nv-interactiveGuideLine");

            if (!svgContainer) {
                return;
            }

            function mouseHandler() {
                var d3mouse = d3.mouse(this);
                var mouseX = d3mouse[0];
                var mouseY = d3mouse[1];
                var subtractMargin = true;
                var mouseOutAnyReason = false;
                if (isMSIE) {
                    /*
                     D3.js (or maybe SVG.getScreenCTM) has a nasty bug in Internet Explorer 10.
                     d3.mouse() returns incorrect X,Y mouse coordinates when mouse moving
                     over a rect in IE 10.
                     However, d3.event.offsetX/Y also returns the mouse coordinates
                     relative to the triggering <rect>. So we use offsetX/Y on IE.
                     */
                    mouseX = d3.event.offsetX;
                    mouseY = d3.event.offsetY;

                    /*
                     On IE, if you attach a mouse event listener to the <svg> container,
                     it will actually trigger it for all the child elements (like <path>, <circle>, etc).
                     When this happens on IE, the offsetX/Y is set to where ever the child element
                     is located.
                     As a result, we do NOT need to subtract margins to figure out the mouse X/Y
                     position under this scenario. Removing the line below *will* cause
                     the interactive layer to not work right on IE.
                     */
                    if(d3.event.target.tagName !== "svg") {
                        subtractMargin = false;
                    }

                    if (d3.event.target.className.baseVal.match("nv-legend")) {
                        mouseOutAnyReason = true;
                    }

                }

                if(subtractMargin) {
                    mouseX -= margin.left;
                    mouseY -= margin.top;
                }

                /* If mouseX/Y is outside of the chart's bounds,
                 trigger a mouseOut event.
                 */
                if (d3.event.type === 'mouseout'
                    || mouseX < 0 || mouseY < 0
                    || mouseX > availableWidth || mouseY > availableHeight
                    || (d3.event.relatedTarget && d3.event.relatedTarget.ownerSVGElement === undefined)
                    || mouseOutAnyReason
                    ) {

                    if (isMSIE) {
                        if (d3.event.relatedTarget
                            && d3.event.relatedTarget.ownerSVGElement === undefined
                            && (d3.event.relatedTarget.className === undefined
                                || d3.event.relatedTarget.className.match(tooltip.nvPointerEventsClass))) {

                            return;
                        }
                    }
                    dispatch.elementMouseout({
                        mouseX: mouseX,
                        mouseY: mouseY
                    });
                    layer.renderGuideLine(null); //hide the guideline
                    tooltip.hidden(true);
                    return;
                } else {
                    tooltip.hidden(false);
                }


                var scaleIsOrdinal = typeof xScale.rangeBands === 'function';
                var pointXValue = undefined;

                // Ordinal scale has no invert method
                if (scaleIsOrdinal) {
                    var elementIndex = d3.bisect(xScale.range(), mouseX) - 1;
                    // Check if mouseX is in the range band
                    if (xScale.range()[elementIndex] + xScale.rangeBand() >= mouseX) {
                        pointXValue = xScale.domain()[d3.bisect(xScale.range(), mouseX) - 1];
                    }
                    else {
                        dispatch.elementMouseout({
                            mouseX: mouseX,
                            mouseY: mouseY
                        });
                        layer.renderGuideLine(null); //hide the guideline
                        tooltip.hidden(true);
                        return;
                    }
                }
                else {
                    pointXValue = xScale.invert(mouseX);
                }

                dispatch.elementMousemove({
                    mouseX: mouseX,
                    mouseY: mouseY,
                    pointXValue: pointXValue
                });

                //If user double clicks the layer, fire a elementDblclick
                if (d3.event.type === "dblclick") {
                    dispatch.elementDblclick({
                        mouseX: mouseX,
                        mouseY: mouseY,
                        pointXValue: pointXValue
                    });
                }

                // if user single clicks the layer, fire elementClick
                if (d3.event.type === 'click') {
                    dispatch.elementClick({
                        mouseX: mouseX,
                        mouseY: mouseY,
                        pointXValue: pointXValue
                    });
                }

                // if user presses mouse down the layer, fire elementMouseDown
                if (d3.event.type === 'mousedown') {
                	dispatch.elementMouseDown({
                		mouseX: mouseX,
                		mouseY: mouseY,
                		pointXValue: pointXValue
                	});
                }

                // if user presses mouse down the layer, fire elementMouseUp
                if (d3.event.type === 'mouseup') {
                	dispatch.elementMouseUp({
                		mouseX: mouseX,
                		mouseY: mouseY,
                		pointXValue: pointXValue
                	});
                }
            }

            svgContainer
                .on("touchmove",mouseHandler)
                .on("mousemove",mouseHandler, true)
                .on("mouseout" ,mouseHandler,true)
                .on("mousedown" ,mouseHandler,true)
                .on("mouseup" ,mouseHandler,true)
                .on("dblclick" ,mouseHandler)
                .on("click", mouseHandler)
            ;

            layer.guideLine = null;
            //Draws a vertical guideline at the given X postion.
            layer.renderGuideLine = function(x) {
                if (!showGuideLine) return;
                if (layer.guideLine && layer.guideLine.attr("x1") === x) return;
                nv.dom.write(function() {
                    var line = wrap.select(".nv-interactiveGuideLine")
                        .selectAll("line")
                        .data((x != null) ? [nv.utils.NaNtoZero(x)] : [], String);
                    line.enter()
                        .append("line")
                        .attr("class", "nv-guideline")
                        .attr("x1", function(d) { return d;})
                        .attr("x2", function(d) { return d;})
                        .attr("y1", availableHeight)
                        .attr("y2",0);
                    line.exit().remove();
                });
            }
        });
    }

    layer.dispatch = dispatch;
    layer.tooltip = tooltip;

    layer.margin = function(_) {
        if (!arguments.length) return margin;
        margin.top    = typeof _.top    != 'undefined' ? _.top    : margin.top;
        margin.left   = typeof _.left   != 'undefined' ? _.left   : margin.left;
        return layer;
    };

    layer.width = function(_) {
        if (!arguments.length) return width;
        width = _;
        return layer;
    };

    layer.height = function(_) {
        if (!arguments.length) return height;
        height = _;
        return layer;
    };

    layer.xScale = function(_) {
        if (!arguments.length) return xScale;
        xScale = _;
        return layer;
    };

    layer.showGuideLine = function(_) {
        if (!arguments.length) return showGuideLine;
        showGuideLine = _;
        return layer;
    };

    layer.svgContainer = function(_) {
        if (!arguments.length) return svgContainer;
        svgContainer = _;
        return layer;
    };

    return layer;
};

/* Utility class that uses d3.bisect to find the index in a given array, where a search value can be inserted.
 This is different from normal bisectLeft; this function finds the nearest index to insert the search value.

 For instance, lets say your array is [1,2,3,5,10,30], and you search for 28.
 Normal d3.bisectLeft will return 4, because 28 is inserted after the number 10.  But interactiveBisect will return 5
 because 28 is closer to 30 than 10.

 Unit tests can be found in: interactiveBisectTest.html

 Has the following known issues:
 * Will not work if the data points move backwards (ie, 10,9,8,7, etc) or if the data points are in random order.
 * Won't work if there are duplicate x coordinate values.
 */
nv.interactiveBisect = function (values, searchVal, xAccessor) {
    "use strict";
    if (! (values instanceof Array)) {
        return null;
    }
    var _xAccessor;
    if (typeof xAccessor !== 'function') {
        _xAccessor = function(d) {
            return d.x;
        }
    } else {
        _xAccessor = xAccessor;
    }
    var _cmp = function(d, v) {
        // Accessors are no longer passed the index of the element along with
        // the element itself when invoked by d3.bisector.
        //
        // Starting at D3 v3.4.4, d3.bisector() started inspecting the
        // function passed to determine if it should consider it an accessor
        // or a comparator. This meant that accessors that take two arguments
        // (expecting an index as the second parameter) are treated as
        // comparators where the second argument is the search value against
        // which the first argument is compared.
        return _xAccessor(d) - v;
    };

    var bisect = d3.bisector(_cmp).left;
    var index = d3.max([0, bisect(values,searchVal) - 1]);
    var currentValue = _xAccessor(values[index]);

    if (typeof currentValue === 'undefined') {
        currentValue = index;
    }

    if (currentValue === searchVal) {
        return index; //found exact match
    }

    var nextIndex = d3.min([index+1, values.length - 1]);
    var nextValue = _xAccessor(values[nextIndex]);

    if (typeof nextValue === 'undefined') {
        nextValue = nextIndex;
    }

    if (Math.abs(nextValue - searchVal) >= Math.abs(currentValue - searchVal)) {
        return index;
    } else {
        return nextIndex
    }
};

/*
 Returns the index in the array "values" that is closest to searchVal.
 Only returns an index if searchVal is within some "threshold".
 Otherwise, returns null.
 */
nv.nearestValueIndex = function (values, searchVal, threshold) {
    "use strict";
    var yDistMax = Infinity, indexToHighlight = null;
    values.forEach(function(d,i) {
        var delta = Math.abs(searchVal - d);
        if ( d != null && delta <= yDistMax && delta < threshold) {
            yDistMax = delta;
            indexToHighlight = i;
        }
    });
    return indexToHighlight;
};

/* Model which can be instantiated to handle tooltip rendering.
 Example usage:
 var tip = nv.models.tooltip().gravity('w').distance(23)
 .data(myDataObject);

 tip();    //just invoke the returned function to render tooltip.
 */
nv.models.tooltip = function() {
    "use strict";

    /*
    Tooltip data. If data is given in the proper format, a consistent tooltip is generated.
    Example Format of data:
    {
        key: "Date",
        value: "August 2009",
        series: [
            {key: "Series 1", value: "Value 1", color: "#000"},
            {key: "Series 2", value: "Value 2", color: "#00f"}
        ]
    }
    */
    var id = "nvtooltip-" + Math.floor(Math.random() * 100000) // Generates a unique id when you create a new tooltip() object.
        ,   data = null
        ,   gravity = 'w'   // Can be 'n','s','e','w'. Determines how tooltip is positioned.
        ,   distance = 25 // Distance to offset tooltip from the mouse location.
        ,   snapDistance = 0   // Tolerance allowed before tooltip is moved from its current position (creates 'snapping' effect)
        ,   classes = null  // Attaches additional CSS classes to the tooltip DIV that is created.
        ,   chartContainer = null // Parent dom element of the SVG that holds the chart.
        ,   hidden = true  // Start off hidden, toggle with hide/show functions below.
        ,   hideDelay = 200  // Delay (in ms) before the tooltip hides after calling hide().
        ,   tooltip = null // d3 select of the tooltip div.
        ,   lastPosition = { left: null, top: null } // Last position the tooltip was in.
        ,   enabled = true  // True -> tooltips are rendered. False -> don't render tooltips.
        ,   duration = 100 // Tooltip movement duration, in ms.
        ,   headerEnabled = true // If is to show the tooltip header.
        ,   nvPointerEventsClass = "nv-pointer-events-none" // CSS class to specify whether element should not have mouse events.
    ;

    /*
     Function that returns the position (relative to the viewport) the tooltip should be placed in.
     Should return: {
        left: <leftPos>,
        top: <topPos>
     }
     */
    var position = function() {
        return {
            left: d3.event !== null ? d3.event.clientX : 0,
            top: d3.event !== null ? d3.event.clientY : 0
        };
    };

    // Format function for the tooltip values column.
    var valueFormatter = function(d, i) {
        return d;
    };

    // Format function for the tooltip header value.
    var headerFormatter = function(d) {
        return d;
    };

    var keyFormatter = function(d, i) {
        return d;
    };

    // By default, the tooltip model renders a beautiful table inside a DIV.
    // You can override this function if a custom tooltip is desired.
    var contentGenerator = function(d) {
        if (d === null) {
            return '';
        }

        var table = d3.select(document.createElement("table"));
        if (headerEnabled) {
            var theadEnter = table.selectAll("thead")
                .data([d])
                .enter().append("thead");

            theadEnter.append("tr")
                .append("td")
                .attr("colspan", 3)
                .append("strong")
                .classed("x-value", true)
                .html(headerFormatter(d.value));
        }

        var tbodyEnter = table.selectAll("tbody")
            .data([d])
            .enter().append("tbody");

        var trowEnter = tbodyEnter.selectAll("tr")
                .data(function(p) { return p.series})
                .enter()
                .append("tr")
                .classed("highlight", function(p) { return p.highlight});

        trowEnter.append("td")
            .classed("legend-color-guide",true)
            .append("div")
            .style("background-color", function(p) { return p.color});

        trowEnter.append("td")
            .classed("key",true)
            .classed("total",function(p) { return !!p.total})
            .html(function(p, i) { return keyFormatter(p.key, i)});

        trowEnter.append("td")
            .classed("value",true)
            .html(function(p, i) { return valueFormatter(p.value, i) });

        trowEnter.selectAll("td").each(function(p) {
            if (p.highlight) {
                var opacityScale = d3.scale.linear().domain([0,1]).range(["#fff",p.color]);
                var opacity = 0.6;
                d3.select(this)
                    .style("border-bottom-color", opacityScale(opacity))
                    .style("border-top-color", opacityScale(opacity))
                ;
            }
        });

        var html = table.node().outerHTML;
        if (d.footer !== undefined)
            html += "<div class='footer'>" + d.footer + "</div>";
        return html;

    };

    var dataSeriesExists = function(d) {
        if (d && d.series) {
            if (nv.utils.isArray(d.series)) {
                return true;
            }
            // if object, it's okay just convert to array of the object
            if (nv.utils.isObject(d.series)) {
                d.series = [d.series];
                return true;
            }
        }
        return false;
    };

    // Calculates the gravity offset of the tooltip. Parameter is position of tooltip
    // relative to the viewport.
    var calcGravityOffset = function(pos) {
        var height = tooltip.node().offsetHeight,
            width = tooltip.node().offsetWidth,
            clientWidth = document.documentElement.clientWidth, // Don't want scrollbars.
            clientHeight = document.documentElement.clientHeight, // Don't want scrollbars.
            left, top, tmp;

        // calculate position based on gravity
        switch (gravity) {
            case 'e':
                left = - width - distance;
                top = - (height / 2);
                if(pos.left + left < 0) left = distance;
                if((tmp = pos.top + top) < 0) top -= tmp;
                if((tmp = pos.top + top + height) > clientHeight) top -= tmp - clientHeight;
                break;
            case 'w':
                left = distance;
                top = - (height / 2);
                if (pos.left + left + width > clientWidth) left = - width - distance;
                if ((tmp = pos.top + top) < 0) top -= tmp;
                if ((tmp = pos.top + top + height) > clientHeight) top -= tmp - clientHeight;
                break;
            case 'n':
                left = - (width / 2) - 5; // - 5 is an approximation of the mouse's height.
                top = distance;
                if (pos.top + top + height > clientHeight) top = - height - distance;
                if ((tmp = pos.left + left) < 0) left -= tmp;
                if ((tmp = pos.left + left + width) > clientWidth) left -= tmp - clientWidth;
                break;
            case 's':
                left = - (width / 2);
                top = - height - distance;
                if (pos.top + top < 0) top = distance;
                if ((tmp = pos.left + left) < 0) left -= tmp;
                if ((tmp = pos.left + left + width) > clientWidth) left -= tmp - clientWidth;
                break;
            case 'center':
                left = - (width / 2);
                top = - (height / 2);
                break;
            default:
                left = 0;
                top = 0;
                break;
        }

        return { 'left': left, 'top': top };
    };

    /*
     Positions the tooltip in the correct place, as given by the position() function.
     */
    var positionTooltip = function() {
        nv.dom.read(function() {
            var pos = position(),
                gravityOffset = calcGravityOffset(pos),
                left = pos.left + gravityOffset.left,
                top = pos.top + gravityOffset.top;

            // delay hiding a bit to avoid flickering
            if (hidden) {
                tooltip
                    .interrupt()
                    .transition()
                    .delay(hideDelay)
                    .duration(0)
                    .style('opacity', 0);
            } else {
                // using tooltip.style('transform') returns values un-usable for tween
                var old_translate = 'translate(' + lastPosition.left + 'px, ' + lastPosition.top + 'px)';
                var new_translate = 'translate(' + left + 'px, ' + top + 'px)';
                var translateInterpolator = d3.interpolateString(old_translate, new_translate);
                var is_hidden = tooltip.style('opacity') < 0.1;

                tooltip
                    .interrupt() // cancel running transitions
                    .transition()
                    .duration(is_hidden ? 0 : duration)
                    // using tween since some versions of d3 can't auto-tween a translate on a div
                    .styleTween('transform', function (d) {
                        return translateInterpolator;
                    }, 'important')
                    // Safari has its own `-webkit-transform` and does not support `transform`
                    .styleTween('-webkit-transform', function (d) {
                        return translateInterpolator;
                    })
                    .style('-ms-transform', new_translate)
                    .style('opacity', 1);
            }

            lastPosition.left = left;
            lastPosition.top = top;
        });
    };

    // Creates new tooltip container, or uses existing one on DOM.
    function initTooltip() {
        if (!tooltip || !tooltip.node()) {
            var container = chartContainer ? chartContainer : document.body;
            // Create new tooltip div if it doesn't exist on DOM.

            var data = [1];
            tooltip = d3.select(container).selectAll('.nvtooltip').data(data);

            tooltip.enter().append('div')
                   .attr("class", "nvtooltip " + (classes ? classes : "xy-tooltip"))
                   .attr("id", id)
                   .style("top", 0).style("left", 0)
                   .style('opacity', 0)
                   .style('position', 'fixed')
                   .selectAll("div, table, td, tr").classed(nvPointerEventsClass, true)
                   .classed(nvPointerEventsClass, true);

            tooltip.exit().remove()
        }
    }

    // Draw the tooltip onto the DOM.
    function nvtooltip() {
        if (!enabled) return;
        if (!dataSeriesExists(data)) return;

        nv.dom.write(function () {
            initTooltip();
            // Generate data and set it into tooltip.
            // Bonus - If you override contentGenerator and return falsey you can use something like
            //         React or Knockout to bind the data for your tooltip.
            var newContent = contentGenerator(data);
            if (newContent) {
                tooltip.node().innerHTML = newContent;
            }

            positionTooltip();
        });

        return nvtooltip;
    }

    nvtooltip.nvPointerEventsClass = nvPointerEventsClass;
    nvtooltip.options = nv.utils.optionsFunc.bind(nvtooltip);

    nvtooltip._options = Object.create({}, {
        // simple read/write options
        duration: {get: function(){return duration;}, set: function(_){duration=_;}},
        gravity: {get: function(){return gravity;}, set: function(_){gravity=_;}},
        distance: {get: function(){return distance;}, set: function(_){distance=_;}},
        snapDistance: {get: function(){return snapDistance;}, set: function(_){snapDistance=_;}},
        classes: {get: function(){return classes;}, set: function(_){classes=_;}},
        chartContainer: {get: function(){return chartContainer;}, set: function(_){chartContainer=_;}},
        enabled: {get: function(){return enabled;}, set: function(_){enabled=_;}},
        hideDelay: {get: function(){return hideDelay;}, set: function(_){hideDelay=_;}},
        contentGenerator: {get: function(){return contentGenerator;}, set: function(_){contentGenerator=_;}},
        valueFormatter: {get: function(){return valueFormatter;}, set: function(_){valueFormatter=_;}},
        headerFormatter: {get: function(){return headerFormatter;}, set: function(_){headerFormatter=_;}},
        keyFormatter: {get: function(){return keyFormatter;}, set: function(_){keyFormatter=_;}},
        headerEnabled: {get: function(){return headerEnabled;}, set: function(_){headerEnabled=_;}},
        position: {get: function(){return position;}, set: function(_){position=_;}},

        // Deprecated options
        fixedTop: {get: function(){return null;}, set: function(_){
            // deprecated after 1.8.1
            nv.deprecated('fixedTop', 'feature removed after 1.8.1');
        }},
        offset: {get: function(){return {left: 0, top: 0};}, set: function(_){
            // deprecated after 1.8.1
            nv.deprecated('offset', 'use chart.tooltip.distance() instead');
        }},

        // options with extra logic
        hidden: {get: function(){return hidden;}, set: function(_){
            if (hidden != _) {
                hidden = !!_;
                nvtooltip();
            }
        }},
        data: {get: function(){return data;}, set: function(_){
            // if showing a single data point, adjust data format with that
            if (_.point) {
                _.value = _.point.x;
                _.series = _.series || {};
                _.series.value = _.point.y;
                _.series.color = _.point.color || _.series.color;
            }
            data = _;
        }},

        // read only properties
        node: {get: function(){return tooltip.node();}, set: function(_){}},
        id: {get: function(){return id;}, set: function(_){}}
    });

    nv.utils.initOptions(nvtooltip);
    return nvtooltip;
};


/*
Gets the browser window size

Returns object with height and width properties
 */
nv.utils.windowSize = function() {
    // Sane defaults
    var size = {width: 640, height: 480};

    // Most recent browsers use
    if (window.innerWidth && window.innerHeight) {
        size.width = window.innerWidth;
        size.height = window.innerHeight;
        return (size);
    }

    // IE can use depending on mode it is in
    if (document.compatMode=='CSS1Compat' &&
        document.documentElement &&
        document.documentElement.offsetWidth ) {

        size.width = document.documentElement.offsetWidth;
        size.height = document.documentElement.offsetHeight;
        return (size);
    }

    // Earlier IE uses Doc.body
    if (document.body && document.body.offsetWidth) {
        size.width = document.body.offsetWidth;
        size.height = document.body.offsetHeight;
        return (size);
    }

    return (size);
};


/* handle dumb browser quirks...  isinstance breaks if you use frames
typeof returns 'object' for null, NaN is a number, etc.
 */
nv.utils.isArray = Array.isArray;
nv.utils.isObject = function(a) {
    return a !== null && typeof a === 'object';
};
nv.utils.isFunction = function(a) {
    return typeof a === 'function';
};
nv.utils.isDate = function(a) {
    return toString.call(a) === '[object Date]';
};
nv.utils.isNumber = function(a) {
    return !isNaN(a) && typeof a === 'number';
};


/*
Binds callback function to run when window is resized
 */
nv.utils.windowResize = function(handler) {
    if (window.addEventListener) {
        window.addEventListener('resize', handler);
    } else {
        nv.log("ERROR: Failed to bind to window.resize with: ", handler);
    }
    // return object with clear function to remove the single added callback.
    return {
        callback: handler,
        clear: function() {
            window.removeEventListener('resize', handler);
        }
    }
};


/*
Backwards compatible way to implement more d3-like coloring of graphs.
Can take in nothing, an array, or a function/scale
To use a normal scale, get the range and pass that because we must be able
to take two arguments and use the index to keep backward compatibility
*/
nv.utils.getColor = function(color) {
    //if you pass in nothing, get default colors back
    if (color === undefined) {
        return nv.utils.defaultColor();

    //if passed an array, turn it into a color scale
    } else if(nv.utils.isArray(color)) {
        var color_scale = d3.scale.ordinal().range(color);
        return function(d, i) {
            var key = i === undefined ? d : i;
            return d.color || color_scale(key);
        };

    //if passed a function or scale, return it, or whatever it may be
    //external libs, such as angularjs-nvd3-directives use this
    } else {
        //can't really help it if someone passes rubbish as color
        return color;
    }
};


/*
Default color chooser uses a color scale of 20 colors from D3
 https://github.com/mbostock/d3/wiki/Ordinal-Scales#categorical-colors
 */
nv.utils.defaultColor = function() {
    // get range of the scale so we'll turn it into our own function.
    return nv.utils.getColor(d3.scale.category20().range());
};


/*
Returns a color function that takes the result of 'getKey' for each series and
looks for a corresponding color from the dictionary
*/
nv.utils.customTheme = function(dictionary, getKey, defaultColors) {
    // use default series.key if getKey is undefined
    getKey = getKey || function(series) { return series.key };
    defaultColors = defaultColors || d3.scale.category20().range();

    // start at end of default color list and walk back to index 0
    var defIndex = defaultColors.length;

    return function(series, index) {
        var key = getKey(series);
        if (nv.utils.isFunction(dictionary[key])) {
            return dictionary[key]();
        } else if (dictionary[key] !== undefined) {
            return dictionary[key];
        } else {
            // no match in dictionary, use a default color
            if (!defIndex) {
                // used all the default colors, start over
                defIndex = defaultColors.length;
            }
            defIndex = defIndex - 1;
            return defaultColors[defIndex];
        }
    };
};


/*
From the PJAX example on d3js.org, while this is not really directly needed
it's a very cool method for doing pjax, I may expand upon it a little bit,
open to suggestions on anything that may be useful
*/
nv.utils.pjax = function(links, content) {

    var load = function(href) {
        d3.html(href, function(fragment) {
            var target = d3.select(content).node();
            target.parentNode.replaceChild(
                d3.select(fragment).select(content).node(),
                target);
            nv.utils.pjax(links, content);
        });
    };

    d3.selectAll(links).on("click", function() {
        history.pushState(this.href, this.textContent, this.href);
        load(this.href);
        d3.event.preventDefault();
    });

    d3.select(window).on("popstate", function() {
        if (d3.event.state) {
            load(d3.event.state);
        }
    });
};


/*
For when we want to approximate the width in pixels for an SVG:text element.
Most common instance is when the element is in a display:none; container.
Forumla is : text.length * font-size * constant_factor
*/
nv.utils.calcApproxTextWidth = function (svgTextElem) {
    if (nv.utils.isFunction(svgTextElem.style) && nv.utils.isFunction(svgTextElem.text)) {
        var fontSize = parseInt(svgTextElem.style("font-size").replace("px",""), 10);
        var textLength = svgTextElem.text().length;
        return nv.utils.NaNtoZero(textLength * fontSize * 0.5);
    }
    return 0;
};


/*
Numbers that are undefined, null or NaN, convert them to zeros.
*/
nv.utils.NaNtoZero = function(n) {
    if (!nv.utils.isNumber(n)
        || isNaN(n)
        || n === null
        || n === Infinity
        || n === -Infinity) {

        return 0;
    }
    return n;
};

/*
Add a way to watch for d3 transition ends to d3
*/
d3.selection.prototype.watchTransition = function(renderWatch){
    var args = [this].concat([].slice.call(arguments, 1));
    return renderWatch.transition.apply(renderWatch, args);
};


/*
Helper object to watch when d3 has rendered something
*/
nv.utils.renderWatch = function(dispatch, duration) {
    if (!(this instanceof nv.utils.renderWatch)) {
        return new nv.utils.renderWatch(dispatch, duration);
    }

    var _duration = duration !== undefined ? duration : 250;
    var renderStack = [];
    var self = this;

    this.models = function(models) {
        models = [].slice.call(arguments, 0);
        models.forEach(function(model){
            model.__rendered = false;
            (function(m){
                m.dispatch.on('renderEnd', function(arg){
                    m.__rendered = true;
                    self.renderEnd('model');
                });
            })(model);

            if (renderStack.indexOf(model) < 0) {
                renderStack.push(model);
            }
        });
    return this;
    };

    this.reset = function(duration) {
        if (duration !== undefined) {
            _duration = duration;
        }
        renderStack = [];
    };

    this.transition = function(selection, args, duration) {
        args = arguments.length > 1 ? [].slice.call(arguments, 1) : [];

        if (args.length > 1) {
            duration = args.pop();
        } else {
            duration = _duration !== undefined ? _duration : 250;
        }
        selection.__rendered = false;

        if (renderStack.indexOf(selection) < 0) {
            renderStack.push(selection);
        }

        if (duration === 0) {
            selection.__rendered = true;
            selection.delay = function() { return this; };
            selection.duration = function() { return this; };
            return selection;
        } else {
            if (selection.length === 0) {
                selection.__rendered = true;
            } else if (selection.every( function(d){ return !d.length; } )) {
                selection.__rendered = true;
            } else {
                selection.__rendered = false;
            }

            var n = 0;
            return selection
                .transition()
                .duration(duration)
                .each(function(){ ++n; })
                .each('end', function(d, i) {
                    if (--n === 0) {
                        selection.__rendered = true;
                        self.renderEnd.apply(this, args);
                    }
                });
        }
    };

    this.renderEnd = function() {
        if (renderStack.every( function(d){ return d.__rendered; } )) {
            renderStack.forEach( function(d){ d.__rendered = false; });
            dispatch.renderEnd.apply(this, arguments);
        }
    }

};


/*
Takes multiple objects and combines them into the first one (dst)
example:  nv.utils.deepExtend({a: 1}, {a: 2, b: 3}, {c: 4});
gives:  {a: 2, b: 3, c: 4}
*/
nv.utils.deepExtend = function(dst){
    var sources = arguments.length > 1 ? [].slice.call(arguments, 1) : [];
    sources.forEach(function(source) {
        for (var key in source) {
            var isArray = nv.utils.isArray(dst[key]);
            var isObject = nv.utils.isObject(dst[key]);
            var srcObj = nv.utils.isObject(source[key]);

            if (isObject && !isArray && srcObj) {
                nv.utils.deepExtend(dst[key], source[key]);
            } else {
                dst[key] = source[key];
            }
        }
    });
};


/*
state utility object, used to track d3 states in the models
*/
nv.utils.state = function(){
    if (!(this instanceof nv.utils.state)) {
        return new nv.utils.state();
    }
    var state = {};
    var _self = this;
    var _setState = function(){};
    var _getState = function(){ return {}; };
    var init = null;
    var changed = null;

    this.dispatch = d3.dispatch('change', 'set');

    this.dispatch.on('set', function(state){
        _setState(state, true);
    });

    this.getter = function(fn){
        _getState = fn;
        return this;
    };

    this.setter = function(fn, callback) {
        if (!callback) {
            callback = function(){};
        }
        _setState = function(state, update){
            fn(state);
            if (update) {
                callback();
            }
        };
        return this;
    };

    this.init = function(state){
        init = init || {};
        nv.utils.deepExtend(init, state);
    };

    var _set = function(){
        var settings = _getState();

        if (JSON.stringify(settings) === JSON.stringify(state)) {
            return false;
        }

        for (var key in settings) {
            if (state[key] === undefined) {
                state[key] = {};
            }
            state[key] = settings[key];
            changed = true;
        }
        return true;
    };

    this.update = function(){
        if (init) {
            _setState(init, false);
            init = null;
        }
        if (_set.call(this)) {
            this.dispatch.change(state);
        }
    };

};


/*
Snippet of code you can insert into each nv.models.* to give you the ability to
do things like:
chart.options({
  showXAxis: true,
  tooltips: true
});

To enable in the chart:
chart.options = nv.utils.optionsFunc.bind(chart);
*/
nv.utils.optionsFunc = function(args) {
    if (args) {
        d3.map(args).forEach((function(key,value) {
            if (nv.utils.isFunction(this[key])) {
                this[key](value);
            }
        }).bind(this));
    }
    return this;
};


/*
numTicks:  requested number of ticks
data:  the chart data

returns the number of ticks to actually use on X axis, based on chart data
to avoid duplicate ticks with the same value
*/
nv.utils.calcTicksX = function(numTicks, data) {
    // find max number of values from all data streams
    var numValues = 1;
    var i = 0;
    for (i; i < data.length; i += 1) {
        var stream_len = data[i] && data[i].values ? data[i].values.length : 0;
        numValues = stream_len > numValues ? stream_len : numValues;
    }
    nv.log("Requested number of ticks: ", numTicks);
    nv.log("Calculated max values to be: ", numValues);
    // make sure we don't have more ticks than values to avoid duplicates
    numTicks = numTicks > numValues ? numTicks = numValues - 1 : numTicks;
    // make sure we have at least one tick
    numTicks = numTicks < 1 ? 1 : numTicks;
    // make sure it's an integer
    numTicks = Math.floor(numTicks);
    nv.log("Calculating tick count as: ", numTicks);
    return numTicks;
};


/*
returns number of ticks to actually use on Y axis, based on chart data
*/
nv.utils.calcTicksY = function(numTicks, data) {
    // currently uses the same logic but we can adjust here if needed later
    return nv.utils.calcTicksX(numTicks, data);
};


/*
Add a particular option from an options object onto chart
Options exposed on a chart are a getter/setter function that returns chart
on set to mimic typical d3 option chaining, e.g. svg.option1('a').option2('b');

option objects should be generated via Object.create() to provide
the option of manipulating data via get/set functions.
*/
nv.utils.initOption = function(chart, name) {
    // if it's a call option, just call it directly, otherwise do get/set
    if (chart._calls && chart._calls[name]) {
        chart[name] = chart._calls[name];
    } else {
        chart[name] = function (_) {
            if (!arguments.length) return chart._options[name];
            chart._overrides[name] = true;
            chart._options[name] = _;
            return chart;
        };
        // calling the option as _option will ignore if set by option already
        // so nvd3 can set options internally but the stop if set manually
        chart['_' + name] = function(_) {
            if (!arguments.length) return chart._options[name];
            if (!chart._overrides[name]) {
                chart._options[name] = _;
            }
            return chart;
        }
    }
};


/*
Add all options in an options object to the chart
*/
nv.utils.initOptions = function(chart) {
    chart._overrides = chart._overrides || {};
    var ops = Object.getOwnPropertyNames(chart._options || {});
    var calls = Object.getOwnPropertyNames(chart._calls || {});
    ops = ops.concat(calls);
    for (var i in ops) {
        nv.utils.initOption(chart, ops[i]);
    }
};


/*
Inherit options from a D3 object
d3.rebind makes calling the function on target actually call it on source
Also use _d3options so we can track what we inherit for documentation and chained inheritance
*/
nv.utils.inheritOptionsD3 = function(target, d3_source, oplist) {
    target._d3options = oplist.concat(target._d3options || []);
    oplist.unshift(d3_source);
    oplist.unshift(target);
    d3.rebind.apply(this, oplist);
};


/*
Remove duplicates from an array
*/
nv.utils.arrayUnique = function(a) {
    return a.sort().filter(function(item, pos) {
        return !pos || item != a[pos - 1];
    });
};


/*
Keeps a list of custom symbols to draw from in addition to d3.svg.symbol
Necessary since d3 doesn't let you extend its list -_-
Add new symbols by doing nv.utils.symbols.set('name', function(size){...});
*/
nv.utils.symbolMap = d3.map();


/*
Replaces d3.svg.symbol so that we can look both there and our own map
 */
nv.utils.symbol = function() {
    var type,
        size = 64;
    function symbol(d,i) {
        var t = type.call(this,d,i);
        var s = size.call(this,d,i);
        if (d3.svg.symbolTypes.indexOf(t) !== -1) {
            return d3.svg.symbol().type(t).size(s)();
        } else {
            return nv.utils.symbolMap.get(t)(s);
        }
    }
    symbol.type = function(_) {
        if (!arguments.length) return type;
        type = d3.functor(_);
        return symbol;
    };
    symbol.size = function(_) {
        if (!arguments.length) return size;
        size = d3.functor(_);
        return symbol;
    };
    return symbol;
};


/*
Inherit option getter/setter functions from source to target
d3.rebind makes calling the function on target actually call it on source
Also track via _inherited and _d3options so we can track what we inherit
for documentation generation purposes and chained inheritance
*/
nv.utils.inheritOptions = function(target, source) {
    // inherit all the things
    var ops = Object.getOwnPropertyNames(source._options || {});
    var calls = Object.getOwnPropertyNames(source._calls || {});
    var inherited = source._inherited || [];
    var d3ops = source._d3options || [];
    var args = ops.concat(calls).concat(inherited).concat(d3ops);
    args.unshift(source);
    args.unshift(target);
    d3.rebind.apply(this, args);
    // pass along the lists to keep track of them, don't allow duplicates
    target._inherited = nv.utils.arrayUnique(ops.concat(calls).concat(inherited).concat(ops).concat(target._inherited || []));
    target._d3options = nv.utils.arrayUnique(d3ops.concat(target._d3options || []));
};


/*
Runs common initialize code on the svg before the chart builds
*/
nv.utils.initSVG = function(svg) {
    svg.classed({'nvd3-svg':true});
};


/*
Sanitize and provide default for the container height.
*/
nv.utils.sanitizeHeight = function(height, container) {
    return (height || parseInt(container.style('height'), 10) || 400);
};


/*
Sanitize and provide default for the container width.
*/
nv.utils.sanitizeWidth = function(width, container) {
    return (width || parseInt(container.style('width'), 10) || 960);
};


/*
Calculate the available height for a chart.
*/
nv.utils.availableHeight = function(height, container, margin) {
    return Math.max(0,nv.utils.sanitizeHeight(height, container) - margin.top - margin.bottom);
};

/*
Calculate the available width for a chart.
*/
nv.utils.availableWidth = function(width, container, margin) {
    return Math.max(0,nv.utils.sanitizeWidth(width, container) - margin.left - margin.right);
};

/*
Clear any rendered chart components and display a chart's 'noData' message
*/
nv.utils.noData = function(chart, container) {
    var opt = chart.options(),
        margin = opt.margin(),
        noData = opt.noData(),
        data = (noData == null) ? ["No Data Available."] : [noData],
        height = nv.utils.availableHeight(null, container, margin),
        width = nv.utils.availableWidth(null, container, margin),
        x = margin.left + width/2,
        y = margin.top + height/2;

    //Remove any previously created chart components
    container.selectAll('g').remove();

    var noDataText = container.selectAll('.nv-noData').data(data);

    noDataText.enter().append('text')
        .attr('class', 'nvd3 nv-noData')
        .attr('dy', '-.7em')
        .style('text-anchor', 'middle');

    noDataText
        .attr('x', x)
        .attr('y', y)
        .text(function(t){ return t; });
};

/*
 Wrap long labels.
 */
nv.utils.wrapTicks = function (text, width) {
    text.each(function() {
        var text = d3.select(this),
            words = text.text().split(/\s+/).reverse(),
            word,
            line = [],
            lineNumber = 0,
            lineHeight = 1.1,
            y = text.attr("y"),
            dy = parseFloat(text.attr("dy")),
            tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em");
        while (word = words.pop()) {
            line.push(word);
            tspan.text(line.join(" "));
            if (tspan.node().getComputedTextLength() > width) {
                line.pop();
                tspan.text(line.join(" "));
                line = [word];
                tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
            }
        }
    });
};

/*
Check equality of 2 array
*/
nv.utils.arrayEquals = function (array1, array2) {
    if (array1 === array2)
        return true;

    if (!array1 || !array2)
        return false;

    // compare lengths - can save a lot of time 
    if (array1.length != array2.length)
        return false;

    for (var i = 0,
        l = array1.length; i < l; i++) {
        // Check if we have nested arrays
        if (array1[i] instanceof Array && array2[i] instanceof Array) {
            // recurse into the nested arrays
            if (!nv.arrayEquals(array1[i], array2[i]))
                return false;
        } else if (array1[i] != array2[i]) {
            // Warning - two different object instances will never be equal: {x:20} != {x:20}
            return false;
        }
    }
    return true;
};nv.models.axis = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var axis = d3.svg.axis();
    var scale = d3.scale.linear();

    var margin = {top: 0, right: 0, bottom: 0, left: 0}
        , width = 75 //only used for tickLabel currently
        , height = 60 //only used for tickLabel currently
        , axisLabelText = null
        , showMaxMin = true //TODO: showMaxMin should be disabled on all ordinal scaled axes
        , rotateLabels = 0
        , rotateYLabel = true
        , staggerLabels = false
        , isOrdinal = false
        , ticks = null
        , axisLabelDistance = 0
        , fontSize = undefined
        , duration = 250
        , dispatch = d3.dispatch('renderEnd')
        ;
    axis
        .scale(scale)
        .orient('bottom')
        .tickFormat(function(d) { return d })
    ;

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var scale0;
    var renderWatch = nv.utils.renderWatch(dispatch, duration);

    function chart(selection) {
        renderWatch.reset();
        selection.each(function(data) {
            var container = d3.select(this);
            nv.utils.initSVG(container);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-axis').data([data]);
            var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-axis');
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');

            if (ticks !== null)
                axis.ticks(ticks);
            else if (axis.orient() == 'top' || axis.orient() == 'bottom')
                axis.ticks(Math.abs(scale.range()[1] - scale.range()[0]) / 100);

            //TODO: consider calculating width/height based on whether or not label is added, for reference in charts using this component
            g.watchTransition(renderWatch, 'axis').call(axis);

            scale0 = scale0 || axis.scale();

            var fmt = axis.tickFormat();
            if (fmt == null) {
                fmt = scale0.tickFormat();
            }

            var axisLabel = g.selectAll('text.nv-axislabel')
                .data([axisLabelText || null]);
            axisLabel.exit().remove();

            //only skip when fontSize is undefined so it can be cleared with a null or blank string
            if (fontSize !== undefined) {
                g.selectAll('g').select("text").style('font-size', fontSize);
            }

            var xLabelMargin;
            var axisMaxMin;
            var w;
            switch (axis.orient()) {
                case 'top':
                    axisLabel.enter().append('text').attr('class', 'nv-axislabel');
                  w = 0;
                  if (scale.range().length === 1) {
                    w = isOrdinal ? scale.range()[0] * 2 + scale.rangeBand() : 0;
                  } else if (scale.range().length === 2) {
                    w = isOrdinal ? scale.range()[0] + scale.range()[1] + scale.rangeBand() : scale.range()[1];
                  } else if ( scale.range().length > 2){
                    w = scale.range()[scale.range().length-1]+(scale.range()[1]-scale.range()[0]);
                  };
                    axisLabel
                        .attr('text-anchor', 'middle')
                        .attr('y', 0)
                        .attr('x', w/2);
                    if (showMaxMin) {
                        axisMaxMin = wrap.selectAll('g.nv-axisMaxMin')
                            .data(scale.domain());
                        axisMaxMin.enter().append('g').attr('class',function(d,i){
                                return ['nv-axisMaxMin','nv-axisMaxMin-x',(i == 0 ? 'nv-axisMin-x':'nv-axisMax-x')].join(' ')
                        }).append('text');
                        axisMaxMin.exit().remove();
                        axisMaxMin
                            .attr('transform', function(d,i) {
                                return 'translate(' + nv.utils.NaNtoZero(scale(d)) + ',0)'
                            })
                            .select('text')
                            .attr('dy', '-0.5em')
                            .attr('y', -axis.tickPadding())
                            .attr('text-anchor', 'middle')
                            .text(function(d,i) {
                                var v = fmt(d);
                                return ('' + v).match('NaN') ? '' : v;
                            });
                        axisMaxMin.watchTransition(renderWatch, 'min-max top')
                            .attr('transform', function(d,i) {
                                return 'translate(' + nv.utils.NaNtoZero(scale.range()[i]) + ',0)'
                            });
                    }
                    break;
                case 'bottom':
                    xLabelMargin = axisLabelDistance + 36;
                    var maxTextWidth = 30;
                    var textHeight = 0;
                    var xTicks = g.selectAll('g').select("text");
                    var rotateLabelsRule = '';
                    if (rotateLabels%360) {
                        //Reset transform on ticks so textHeight can be calculated correctly
                        xTicks.attr('transform', ''); 
                        //Calculate the longest xTick width
                        xTicks.each(function(d,i){
                            var box = this.getBoundingClientRect();
                            var width = box.width;
                            textHeight = box.height;
                            if(width > maxTextWidth) maxTextWidth = width;
                        });
                        rotateLabelsRule = 'rotate(' + rotateLabels + ' 0,' + (textHeight/2 + axis.tickPadding()) + ')';
                        //Convert to radians before calculating sin. Add 30 to margin for healthy padding.
                        var sin = Math.abs(Math.sin(rotateLabels*Math.PI/180));
                        xLabelMargin = (sin ? sin*maxTextWidth : maxTextWidth)+30;
                        //Rotate all xTicks
                        xTicks
                            .attr('transform', rotateLabelsRule)
                            .style('text-anchor', rotateLabels%360 > 0 ? 'start' : 'end');
                    } else {
                        if (staggerLabels) {
                            xTicks
                                .attr('transform', function(d,i) {
                                    return 'translate(0,' + (i % 2 == 0 ? '0' : '12') + ')'
                                });
                        } else {
                            xTicks.attr('transform', "translate(0,0)");
                        }
                    }
                    axisLabel.enter().append('text').attr('class', 'nv-axislabel');
                    w = 0;
                    if (scale.range().length === 1) {
                        w = isOrdinal ? scale.range()[0] * 2 + scale.rangeBand() : 0;
                    } else if (scale.range().length === 2) {
                        w = isOrdinal ? scale.range()[0] + scale.range()[1] + scale.rangeBand() : scale.range()[1];
                    } else if ( scale.range().length > 2){
                        w = scale.range()[scale.range().length-1]+(scale.range()[1]-scale.range()[0]);
                    };
                    axisLabel
                        .attr('text-anchor', 'middle')
                        .attr('y', xLabelMargin)
                        .attr('x', w/2);
                    if (showMaxMin) {
                        //if (showMaxMin && !isOrdinal) {
                        axisMaxMin = wrap.selectAll('g.nv-axisMaxMin')
                            //.data(scale.domain())
                            .data([scale.domain()[0], scale.domain()[scale.domain().length - 1]]);
                        axisMaxMin.enter().append('g').attr('class',function(d,i){
                                return ['nv-axisMaxMin','nv-axisMaxMin-x',(i == 0 ? 'nv-axisMin-x':'nv-axisMax-x')].join(' ')
                        }).append('text');
                        axisMaxMin.exit().remove();
                        axisMaxMin
                            .attr('transform', function(d,i) {
                                return 'translate(' + nv.utils.NaNtoZero((scale(d) + (isOrdinal ? scale.rangeBand() / 2 : 0))) + ',0)'
                            })
                            .select('text')
                            .attr('dy', '.71em')
                            .attr('y', axis.tickPadding())
                            .attr('transform', rotateLabelsRule)
                            .style('text-anchor', rotateLabels ? (rotateLabels%360 > 0 ? 'start' : 'end') : 'middle')
                            .text(function(d,i) {
                                var v = fmt(d);
                                return ('' + v).match('NaN') ? '' : v;
                            });
                        axisMaxMin.watchTransition(renderWatch, 'min-max bottom')
                            .attr('transform', function(d,i) {
                                return 'translate(' + nv.utils.NaNtoZero((scale(d) + (isOrdinal ? scale.rangeBand() / 2 : 0))) + ',0)'
                            });
                    }

                    break;
                case 'right':
                    axisLabel.enter().append('text').attr('class', 'nv-axislabel');
                    axisLabel
                        .style('text-anchor', rotateYLabel ? 'middle' : 'begin')
                        .attr('transform', rotateYLabel ? 'rotate(90)' : '')
                        .attr('y', rotateYLabel ? (-Math.max(margin.right, width) + 12) : -10) //TODO: consider calculating this based on largest tick width... OR at least expose this on chart
                        .attr('x', rotateYLabel ? (d3.max(scale.range()) / 2) : axis.tickPadding());
                    if (showMaxMin) {
                        axisMaxMin = wrap.selectAll('g.nv-axisMaxMin')
                            .data(scale.domain());
                       	axisMaxMin.enter().append('g').attr('class',function(d,i){
                                return ['nv-axisMaxMin','nv-axisMaxMin-y',(i == 0 ? 'nv-axisMin-y':'nv-axisMax-y')].join(' ')
                        }).append('text')
                            .style('opacity', 0);
                        axisMaxMin.exit().remove();
                        axisMaxMin
                            .attr('transform', function(d,i) {
                                return 'translate(0,' + nv.utils.NaNtoZero(scale(d)) + ')'
                            })
                            .select('text')
                            .attr('dy', '.32em')
                            .attr('y', 0)
                            .attr('x', axis.tickPadding())
                            .style('text-anchor', 'start')
                            .text(function(d, i) {
                                var v = fmt(d);
                                return ('' + v).match('NaN') ? '' : v;
                            });
                        axisMaxMin.watchTransition(renderWatch, 'min-max right')
                            .attr('transform', function(d,i) {
                                return 'translate(0,' + nv.utils.NaNtoZero(scale.range()[i]) + ')'
                            })
                            .select('text')
                            .style('opacity', 1);
                    }
                    break;
                case 'left':
                    /*
                     //For dynamically placing the label. Can be used with dynamically-sized chart axis margins
                     var yTicks = g.selectAll('g').select("text");
                     yTicks.each(function(d,i){
                     var labelPadding = this.getBoundingClientRect().width + axis.tickPadding() + 16;
                     if(labelPadding > width) width = labelPadding;
                     });
                     */
                    axisLabel.enter().append('text').attr('class', 'nv-axislabel');
                    axisLabel
                        .style('text-anchor', rotateYLabel ? 'middle' : 'end')
                        .attr('transform', rotateYLabel ? 'rotate(-90)' : '')
                        .attr('y', rotateYLabel ? (-Math.max(margin.left, width) + 25 - (axisLabelDistance || 0)) : -10)
                        .attr('x', rotateYLabel ? (-d3.max(scale.range()) / 2) : -axis.tickPadding());
                    if (showMaxMin) {
                        axisMaxMin = wrap.selectAll('g.nv-axisMaxMin')
                            .data(scale.domain());
                        axisMaxMin.enter().append('g').attr('class',function(d,i){
                                return ['nv-axisMaxMin','nv-axisMaxMin-y',(i == 0 ? 'nv-axisMin-y':'nv-axisMax-y')].join(' ')
                        }).append('text')
                            .style('opacity', 0);
                        axisMaxMin.exit().remove();
                        axisMaxMin
                            .attr('transform', function(d,i) {
                                return 'translate(0,' + nv.utils.NaNtoZero(scale0(d)) + ')'
                            })
                            .select('text')
                            .attr('dy', '.32em')
                            .attr('y', 0)
                            .attr('x', -axis.tickPadding())
                            .attr('text-anchor', 'end')
                            .text(function(d,i) {
                                var v = fmt(d);
                                return ('' + v).match('NaN') ? '' : v;
                            });
                        axisMaxMin.watchTransition(renderWatch, 'min-max right')
                            .attr('transform', function(d,i) {
                                return 'translate(0,' + nv.utils.NaNtoZero(scale.range()[i]) + ')'
                            })
                            .select('text')
                            .style('opacity', 1);
                    }
                    break;
            }
            axisLabel.text(function(d) { return d });

            if (showMaxMin && (axis.orient() === 'left' || axis.orient() === 'right')) {
                //check if max and min overlap other values, if so, hide the values that overlap
                g.selectAll('g') // the g's wrapping each tick
                    .each(function(d,i) {
                        d3.select(this).select('text').attr('opacity', 1);
                        if (scale(d) < scale.range()[1] + 10 || scale(d) > scale.range()[0] - 10) { // 10 is assuming text height is 16... if d is 0, leave it!
                            if (d > 1e-10 || d < -1e-10) // accounts for minor floating point errors... though could be problematic if the scale is EXTREMELY SMALL
                                d3.select(this).attr('opacity', 0);

                            d3.select(this).select('text').attr('opacity', 0); // Don't remove the ZERO line!!
                        }
                    });

                //if Max and Min = 0 only show min, Issue #281
                if (scale.domain()[0] == scale.domain()[1] && scale.domain()[0] == 0) {
                    wrap.selectAll('g.nv-axisMaxMin').style('opacity', function (d, i) {
                        return !i ? 1 : 0
                    });
                }
            }

            if (showMaxMin && (axis.orient() === 'top' || axis.orient() === 'bottom')) {
                var maxMinRange = [];
                wrap.selectAll('g.nv-axisMaxMin')
                    .each(function(d,i) {
                        try {
                            if (i) // i== 1, max position
                                maxMinRange.push(scale(d) - this.getBoundingClientRect().width - 4);  //assuming the max and min labels are as wide as the next tick (with an extra 4 pixels just in case)
                            else // i==0, min position
                                maxMinRange.push(scale(d) + this.getBoundingClientRect().width + 4)
                        }catch (err) {
                            if (i) // i== 1, max position
                                maxMinRange.push(scale(d) - 4);  //assuming the max and min labels are as wide as the next tick (with an extra 4 pixels just in case)
                            else // i==0, min position
                                maxMinRange.push(scale(d) + 4);
                        }
                    });
                // the g's wrapping each tick
                g.selectAll('g').each(function(d, i) {
                    if (scale(d) < maxMinRange[0] || scale(d) > maxMinRange[1]) {
                        if (d > 1e-10 || d < -1e-10) // accounts for minor floating point errors... though could be problematic if the scale is EXTREMELY SMALL
                            d3.select(this).remove();
                        else
                            d3.select(this).select('text').remove(); // Don't remove the ZERO line!!
                    }
                });
            }

            //Highlight zero tick line
            g.selectAll('.tick')
                .filter(function (d) {
                    /*
                    The filter needs to return only ticks at or near zero.
                    Numbers like 0.00001 need to count as zero as well,
                    and the arithmetic trick below solves that.
                    */
                    return !parseFloat(Math.round(d * 100000) / 1000000) && (d !== undefined)
                }) 
                .classed('zero', true);
            
            //store old scales for use in transitions on update
            scale0 = scale.copy();

        });

        renderWatch.renderEnd('axis immediate');
        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    // expose chart's sub-components
    chart.axis = axis;
    chart.dispatch = dispatch;

    chart.options = nv.utils.optionsFunc.bind(chart);
    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        axisLabelDistance: {get: function(){return axisLabelDistance;}, set: function(_){axisLabelDistance=_;}},
        staggerLabels:     {get: function(){return staggerLabels;}, set: function(_){staggerLabels=_;}},
        rotateLabels:      {get: function(){return rotateLabels;}, set: function(_){rotateLabels=_;}},
        rotateYLabel:      {get: function(){return rotateYLabel;}, set: function(_){rotateYLabel=_;}},
        showMaxMin:        {get: function(){return showMaxMin;}, set: function(_){showMaxMin=_;}},
        axisLabel:         {get: function(){return axisLabelText;}, set: function(_){axisLabelText=_;}},
        height:            {get: function(){return height;}, set: function(_){height=_;}},
        ticks:             {get: function(){return ticks;}, set: function(_){ticks=_;}},
        width:             {get: function(){return width;}, set: function(_){width=_;}},
        fontSize:          {get: function(){return fontSize;}, set: function(_){fontSize=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top !== undefined    ? _.top    : margin.top;
            margin.right  = _.right !== undefined  ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left !== undefined   ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration=_;
            renderWatch.reset(duration);
        }},
        scale: {get: function(){return scale;}, set: function(_){
            scale = _;
            axis.scale(scale);
            isOrdinal = typeof scale.rangeBands === 'function';
            nv.utils.inheritOptionsD3(chart, scale, ['domain', 'range', 'rangeBand', 'rangeBands']);
        }}
    });

    nv.utils.initOptions(chart);
    nv.utils.inheritOptionsD3(chart, axis, ['orient', 'tickValues', 'tickSubdivide', 'tickSize', 'tickPadding', 'tickFormat']);
    nv.utils.inheritOptionsD3(chart, scale, ['domain', 'range', 'rangeBand', 'rangeBands']);

    return chart;
};

nv.models.scatter = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var margin       = {top: 0, right: 0, bottom: 0, left: 0}
        , width        = null
        , height       = null
        , color        = nv.utils.defaultColor() // chooses color
        , id           = Math.floor(Math.random() * 100000) //Create semi-unique ID incase user doesn't select one
        , container    = null
        , x            = d3.scale.linear()
        , y            = d3.scale.linear()
        , z            = d3.scale.linear() //linear because d3.svg.shape.size is treated as area
        , getX         = function(d) { return d.x } // accessor to get the x value
        , getY         = function(d) { return d.y } // accessor to get the y value
        , getSize      = function(d) { return d.size || 1} // accessor to get the point size
        , getShape     = function(d) { return d.shape || 'circle' } // accessor to get point shape
        , forceX       = [] // List of numbers to Force into the X scale (ie. 0, or a max / min, etc.)
        , forceY       = [] // List of numbers to Force into the Y scale
        , forceSize    = [] // List of numbers to Force into the Size scale
        , interactive  = true // If true, plots a voronoi overlay for advanced point intersection
        , pointActive  = function(d) { return !d.notActive } // any points that return false will be filtered out
        , padData      = false // If true, adds half a data points width to front and back, for lining up a line chart with a bar chart
        , padDataOuter = .1 //outerPadding to imitate ordinal scale outer padding
        , clipEdge     = false // if true, masks points within x and y scale
        , clipVoronoi  = true // if true, masks each point with a circle... can turn off to slightly increase performance
        , showVoronoi  = false // display the voronoi areas
        , clipRadius   = function() { return 25 } // function to get the radius for voronoi point clips
        , xDomain      = null // Override x domain (skips the calculation from data)
        , yDomain      = null // Override y domain
        , xRange       = null // Override x range
        , yRange       = null // Override y range
        , sizeDomain   = null // Override point size domain
        , sizeRange    = null
        , singlePoint  = false
        , dispatch     = d3.dispatch('elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout', 'renderEnd')
        , useVoronoi   = true
        , duration     = 250
        , interactiveUpdateDelay = 300
        , showLabels    = false 
        ;


    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var x0, y0, z0 // used to store previous scales
        , timeoutID
        , needsUpdate = false // Flag for when the points are visually updating, but the interactive layer is behind, to disable tooltips
        , renderWatch = nv.utils.renderWatch(dispatch, duration)
        , _sizeRange_def = [16, 256]
        , _caches
        ;

    function getCache(d) {
        var cache, i;
        cache = _caches = _caches || {};
        i = d[0].series;
        cache = cache[i] = cache[i] || {};
        i = d[1];
        cache = cache[i] = cache[i] || {};
        return cache;
    }

    function getDiffs(d) {
        var i, key,
            point = d[0],
            cache = getCache(d),
            diffs = false;
        for (i = 1; i < arguments.length; i ++) {
            key = arguments[i];
            if (cache[key] !== point[key] || !cache.hasOwnProperty(key)) {
                cache[key] = point[key];
                diffs = true;
            }
        }
        return diffs;
    }

    function chart(selection) {
        renderWatch.reset();
        selection.each(function(data) {
            container = d3.select(this);
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight = nv.utils.availableHeight(height, container, margin);

            nv.utils.initSVG(container);

            //add series index to each data point for reference
            data.forEach(function(series, i) {
                series.values.forEach(function(point) {
                    point.series = i;
                });
            });

            // Setup Scales
            var logScale = chart.yScale().name === d3.scale.log().name ? true : false; 
            // remap and flatten the data for use in calculating the scales' domains
            var seriesData = (xDomain && yDomain && sizeDomain) ? [] : // if we know xDomain and yDomain and sizeDomain, no need to calculate.... if Size is constant remember to set sizeDomain to speed up performance
                d3.merge(
                    data.map(function(d) {
                        return d.values.map(function(d,i) {
                            return { x: getX(d,i), y: getY(d,i), size: getSize(d,i) }
                        })
                    })
                );

            x   .domain(xDomain || d3.extent(seriesData.map(function(d) { return d.x; }).concat(forceX)))

            if (padData && data[0])
                x.range(xRange || [(availableWidth * padDataOuter +  availableWidth) / (2 *data[0].values.length), availableWidth - availableWidth * (1 + padDataOuter) / (2 * data[0].values.length)  ]);
            //x.range([availableWidth * .5 / data[0].values.length, availableWidth * (data[0].values.length - .5)  / data[0].values.length ]);
            else
                x.range(xRange || [0, availableWidth]);

             if (logScale) {
                    var min = d3.min(seriesData.map(function(d) { if (d.y !== 0) return d.y; }));
                    y.clamp(true)
                        .domain(yDomain || d3.extent(seriesData.map(function(d) {
                            if (d.y !== 0) return d.y;
                            else return min * 0.1;
                        }).concat(forceY)))
                        .range(yRange || [availableHeight, 0]);
                } else {
                        y.domain(yDomain || d3.extent(seriesData.map(function (d) { return d.y;}).concat(forceY)))
                        .range(yRange || [availableHeight, 0]);
                }

            z   .domain(sizeDomain || d3.extent(seriesData.map(function(d) { return d.size }).concat(forceSize)))
                .range(sizeRange || _sizeRange_def);

            // If scale's domain don't have a range, slightly adjust to make one... so a chart can show a single data point
            singlePoint = x.domain()[0] === x.domain()[1] || y.domain()[0] === y.domain()[1];

            if (x.domain()[0] === x.domain()[1])
                x.domain()[0] ?
                    x.domain([x.domain()[0] - x.domain()[0] * 0.01, x.domain()[1] + x.domain()[1] * 0.01])
                    : x.domain([-1,1]);

            if (y.domain()[0] === y.domain()[1])
                y.domain()[0] ?
                    y.domain([y.domain()[0] - y.domain()[0] * 0.01, y.domain()[1] + y.domain()[1] * 0.01])
                    : y.domain([-1,1]);

            if ( isNaN(x.domain()[0])) {
                x.domain([-1,1]);
            }

            if ( isNaN(y.domain()[0])) {
                y.domain([-1,1]);
            }

            x0 = x0 || x;
            y0 = y0 || y;
            z0 = z0 || z;

            var scaleDiff = x(1) !== x0(1) || y(1) !== y0(1) || z(1) !== z0(1);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-scatter').data([data]);
            var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-scatter nv-chart-' + id);
            var defsEnter = wrapEnter.append('defs');
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');

            wrap.classed('nv-single-point', singlePoint);
            gEnter.append('g').attr('class', 'nv-groups');
            gEnter.append('g').attr('class', 'nv-point-paths');
            wrapEnter.append('g').attr('class', 'nv-point-clips');

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            defsEnter.append('clipPath')
                .attr('id', 'nv-edge-clip-' + id)
                .append('rect');

            wrap.select('#nv-edge-clip-' + id + ' rect')
                .attr('width', availableWidth)
                .attr('height', (availableHeight > 0) ? availableHeight : 0);

            g.attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');

            function updateInteractiveLayer() {
                // Always clear needs-update flag regardless of whether or not
                // we will actually do anything (avoids needless invocations).
                needsUpdate = false;

                if (!interactive) return false;

                // inject series and point index for reference into voronoi
                if (useVoronoi === true) {
                    var vertices = d3.merge(data.map(function(group, groupIndex) {
                            return group.values
                                .map(function(point, pointIndex) {
                                    // *Adding noise to make duplicates very unlikely
                                    // *Injecting series and point index for reference
                                    /* *Adding a 'jitter' to the points, because there's an issue in d3.geom.voronoi.
                                     */
                                    var pX = getX(point,pointIndex);
                                    var pY = getY(point,pointIndex);

                                    return [nv.utils.NaNtoZero(x(pX))+ Math.random() * 1e-4,
                                            nv.utils.NaNtoZero(y(pY))+ Math.random() * 1e-4,
                                        groupIndex,
                                        pointIndex, point]; //temp hack to add noise until I think of a better way so there are no duplicates
                                })
                                .filter(function(pointArray, pointIndex) {
                                    return pointActive(pointArray[4], pointIndex); // Issue #237.. move filter to after map, so pointIndex is correct!
                                })
                        })
                    );

                    if (vertices.length == 0) return false;  // No active points, we're done
                    if (vertices.length < 3) {
                        // Issue #283 - Adding 2 dummy points to the voronoi b/c voronoi requires min 3 points to work
                        vertices.push([x.range()[0] - 20, y.range()[0] - 20, null, null]);
                        vertices.push([x.range()[1] + 20, y.range()[1] + 20, null, null]);
                        vertices.push([x.range()[0] - 20, y.range()[0] + 20, null, null]);
                        vertices.push([x.range()[1] + 20, y.range()[1] - 20, null, null]);
                    }

                    // keep voronoi sections from going more than 10 outside of graph
                    // to avoid overlap with other things like legend etc
                    var bounds = d3.geom.polygon([
                        [-10,-10],
                        [-10,height + 10],
                        [width + 10,height + 10],
                        [width + 10,-10]
                    ]);

                    var voronoi = d3.geom.voronoi(vertices).map(function(d, i) {
                        return {
                            'data': bounds.clip(d),
                            'series': vertices[i][2],
                            'point': vertices[i][3]
                        }
                    });

                    // nuke all voronoi paths on reload and recreate them
                    wrap.select('.nv-point-paths').selectAll('path').remove();
                    var pointPaths = wrap.select('.nv-point-paths').selectAll('path').data(voronoi);
                    var vPointPaths = pointPaths
                        .enter().append("svg:path")
                        .attr("d", function(d) {
                            if (!d || !d.data || d.data.length === 0)
                                return 'M 0 0';
                            else
                                return "M" + d.data.join(",") + "Z";
                        })
                        .attr("id", function(d,i) {
                            return "nv-path-"+i; })
                        .attr("clip-path", function(d,i) { return "url(#nv-clip-"+id+"-"+i+")"; })
                        ;

                    // good for debugging point hover issues
                    if (showVoronoi) {
                        vPointPaths.style("fill", d3.rgb(230, 230, 230))
                            .style('fill-opacity', 0.4)
                            .style('stroke-opacity', 1)
                            .style("stroke", d3.rgb(200,200,200));
                    }

                    if (clipVoronoi) {
                        // voronoi sections are already set to clip,
                        // just create the circles with the IDs they expect
                        wrap.select('.nv-point-clips').selectAll('*').remove(); // must do * since it has sub-dom
                        var pointClips = wrap.select('.nv-point-clips').selectAll('clipPath').data(vertices);
                        var vPointClips = pointClips
                            .enter().append("svg:clipPath")
                            .attr("id", function(d, i) { return "nv-clip-"+id+"-"+i;})
                            .append("svg:circle")
                            .attr('cx', function(d) { return d[0]; })
                            .attr('cy', function(d) { return d[1]; })
                            .attr('r', clipRadius);
                    }

                    var mouseEventCallback = function(d, mDispatch) {
                        if (needsUpdate) return 0;
                        var series = data[d.series];
                        if (series === undefined) return;
                        var point  = series.values[d.point];
                        point['color'] = color(series, d.series);

                        // standardize attributes for tooltip.
                        point['x'] = getX(point);
                        point['y'] = getY(point);

                        // can't just get box of event node since it's actually a voronoi polygon
                        var box = container.node().getBoundingClientRect();
                        var scrollTop  = window.pageYOffset || document.documentElement.scrollTop;
                        var scrollLeft = window.pageXOffset || document.documentElement.scrollLeft;

                        var pos = {
                            left: x(getX(point, d.point)) + box.left + scrollLeft + margin.left + 10,
                            top: y(getY(point, d.point)) + box.top + scrollTop + margin.top + 10
                        };

                        mDispatch({
                            point: point,
                            series: series,
                            pos: pos,
                            relativePos: [x(getX(point, d.point)) + margin.left, y(getY(point, d.point)) + margin.top],
                            seriesIndex: d.series,
                            pointIndex: d.point
                        });
                    };

                    pointPaths
                        .on('click', function(d) {
                            mouseEventCallback(d, dispatch.elementClick);
                        })
                        .on('dblclick', function(d) {
                            mouseEventCallback(d, dispatch.elementDblClick);
                        })
                        .on('mouseover', function(d) {
                            mouseEventCallback(d, dispatch.elementMouseover);
                        })
                        .on('mouseout', function(d, i) {
                            mouseEventCallback(d, dispatch.elementMouseout);
                        });

                } else {
                    // add event handlers to points instead voronoi paths
                    wrap.select('.nv-groups').selectAll('.nv-group')
                        .selectAll('.nv-point')
                        //.data(dataWithPoints)
                        //.style('pointer-events', 'auto') // recativate events, disabled by css
                        .on('click', function(d,i) {
                            //nv.log('test', d, i);
                            if (needsUpdate || !data[d.series]) return 0; //check if this is a dummy point
                            var series = data[d.series],
                                point  = series.values[i];

                            dispatch.elementClick({
                                point: point,
                                series: series,
                                pos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top], //TODO: make this pos base on the page
                                relativePos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],
                                seriesIndex: d.series,
                                pointIndex: i
                            });
                        })
                        .on('dblclick', function(d,i) {
                            if (needsUpdate || !data[d.series]) return 0; //check if this is a dummy point
                            var series = data[d.series],
                                point  = series.values[i];

                            dispatch.elementDblClick({
                                point: point,
                                series: series,
                                pos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],//TODO: make this pos base on the page
                                relativePos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],
                                seriesIndex: d.series,
                                pointIndex: i
                            });
                        })
                        .on('mouseover', function(d,i) {
                            if (needsUpdate || !data[d.series]) return 0; //check if this is a dummy point
                            var series = data[d.series],
                                point  = series.values[i];

                            dispatch.elementMouseover({
                                point: point,
                                series: series,
                                pos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],//TODO: make this pos base on the page
                                relativePos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],
                                seriesIndex: d.series,
                                pointIndex: i,
                                color: color(d, i)
                            });
                        })
                        .on('mouseout', function(d,i) {
                            if (needsUpdate || !data[d.series]) return 0; //check if this is a dummy point
                            var series = data[d.series],
                                point  = series.values[i];

                            dispatch.elementMouseout({
                                point: point,
                                series: series,
                                pos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],//TODO: make this pos base on the page
                                relativePos: [x(getX(point, i)) + margin.left, y(getY(point, i)) + margin.top],
                                seriesIndex: d.series,
                                pointIndex: i,
                                color: color(d, i)
                            });
                        });
                }
            }

            needsUpdate = true;
            var groups = wrap.select('.nv-groups').selectAll('.nv-group')
                .data(function(d) { return d }, function(d) { return d.key });
            groups.enter().append('g')
                .style('stroke-opacity', 1e-6)
                .style('fill-opacity', 1e-6);
            groups.exit()
                .remove();
            groups
                .attr('class', function(d,i) {
                    return (d.classed || '') + ' nv-group nv-series-' + i;
                })
                .classed('nv-noninteractive', !interactive)
                .classed('hover', function(d) { return d.hover });
            groups.watchTransition(renderWatch, 'scatter: groups')
                .style('fill', function(d,i) { return color(d, i) })
                .style('stroke', function(d,i) { return color(d, i) })
                .style('stroke-opacity', 1)
                .style('fill-opacity', .5);

            // create the points, maintaining their IDs from the original data set
            var points = groups.selectAll('path.nv-point')
                .data(function(d) {
                    return d.values.map(
                        function (point, pointIndex) {
                            return [point, pointIndex]
                        }).filter(
                            function(pointArray, pointIndex) {
                                return pointActive(pointArray[0], pointIndex)
                            })
                    });
            points.enter().append('path')
                .attr('class', function (d) {
                    return 'nv-point nv-point-' + d[1];
                })
                .style('fill', function (d) { return d.color })
                .style('stroke', function (d) { return d.color })
                .attr('transform', function(d) {
                    return 'translate(' + nv.utils.NaNtoZero(x0(getX(d[0],d[1]))) + ',' + nv.utils.NaNtoZero(y0(getY(d[0],d[1]))) + ')'
                })
                .attr('d',
                    nv.utils.symbol()
                    .type(function(d) { return getShape(d[0]); })
                    .size(function(d) { return z(getSize(d[0],d[1])) })
            );
            points.exit().remove();
            groups.exit().selectAll('path.nv-point')
                .watchTransition(renderWatch, 'scatter exit')
                .attr('transform', function(d) {
                    return 'translate(' + nv.utils.NaNtoZero(x(getX(d[0],d[1]))) + ',' + nv.utils.NaNtoZero(y(getY(d[0],d[1]))) + ')'
                })
                .remove();
            points.filter(function (d) { return scaleDiff || getDiffs(d, 'x', 'y'); })
                .watchTransition(renderWatch, 'scatter points')
                .attr('transform', function(d) {
                    //nv.log(d, getX(d[0],d[1]), x(getX(d[0],d[1])));
                    return 'translate(' + nv.utils.NaNtoZero(x(getX(d[0],d[1]))) + ',' + nv.utils.NaNtoZero(y(getY(d[0],d[1]))) + ')'
                });
            points.filter(function (d) { return scaleDiff || getDiffs(d, 'shape', 'size'); })
                .watchTransition(renderWatch, 'scatter points')
                .attr('d',
                    nv.utils.symbol()
                    .type(function(d) { return getShape(d[0]); })
                    .size(function(d) { return z(getSize(d[0],d[1])) })
            );
            
            // add label a label to scatter chart 
            if(showLabels)
            {      
                var titles =  groups.selectAll('.nv-label')
                    .data(function(d) {
                        return d.values.map(
                            function (point, pointIndex) {
                                return [point, pointIndex]
                            }).filter(
                                function(pointArray, pointIndex) {
                                    return pointActive(pointArray[0], pointIndex)
                                })
                        });

                titles.enter().append('text')
                    .style('fill', function (d,i) { 
                        return d.color })
                    .style('stroke-opacity', 0)
                    .style('fill-opacity', 1)
                    .attr('transform', function(d) {
                        var dx = nv.utils.NaNtoZero(x0(getX(d[0],d[1]))) + Math.sqrt(z(getSize(d[0],d[1]))/Math.PI) + 2;
                        return 'translate(' + dx + ',' + nv.utils.NaNtoZero(y0(getY(d[0],d[1]))) + ')';
                    })
                    .text(function(d,i){
                        return d[0].label;});

                titles.exit().remove();
                groups.exit().selectAll('path.nv-label')
                    .watchTransition(renderWatch, 'scatter exit')
                    .attr('transform', function(d) {
                        var dx = nv.utils.NaNtoZero(x(getX(d[0],d[1])))+ Math.sqrt(z(getSize(d[0],d[1]))/Math.PI)+2;
                        return 'translate(' + dx + ',' + nv.utils.NaNtoZero(y(getY(d[0],d[1]))) + ')';
                    })
                    .remove();
               titles.each(function(d) {
                  d3.select(this)
                    .classed('nv-label', true)
                    .classed('nv-label-' + d[1], false)
                    .classed('hover',false);
                });
                titles.watchTransition(renderWatch, 'scatter labels')
                    .attr('transform', function(d) {
                        var dx = nv.utils.NaNtoZero(x(getX(d[0],d[1])))+ Math.sqrt(z(getSize(d[0],d[1]))/Math.PI)+2;
                        return 'translate(' + dx + ',' + nv.utils.NaNtoZero(y(getY(d[0],d[1]))) + ')'
                    });
            }

            // Delay updating the invisible interactive layer for smoother animation
            if( interactiveUpdateDelay )
            {
                clearTimeout(timeoutID); // stop repeat calls to updateInteractiveLayer
                timeoutID = setTimeout(updateInteractiveLayer, interactiveUpdateDelay );
            }
            else
            {
                updateInteractiveLayer();
            }

            //store old scales for use in transitions on update
            x0 = x.copy();
            y0 = y.copy();
            z0 = z.copy();

        });
        renderWatch.renderEnd('scatter immediate');
        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.options = nv.utils.optionsFunc.bind(chart);

    // utility function calls provided by this chart
    chart._calls = new function() {
        this.clearHighlights = function () {
            nv.dom.write(function() {
                container.selectAll(".nv-point.hover").classed("hover", false);
            });
            return null;
        };
        this.highlightPoint = function (seriesIndex, pointIndex, isHoverOver) {
            nv.dom.write(function() {
                container.select('.nv-groups')
                  .selectAll(".nv-series-" + seriesIndex)
                  .selectAll(".nv-point-" + pointIndex)
                  .classed("hover", isHoverOver);
            });
        };
    };

    // trigger calls from events too
    dispatch.on('elementMouseover.point', function(d) {
        if (interactive) chart._calls.highlightPoint(d.seriesIndex,d.pointIndex,true);
    });

    dispatch.on('elementMouseout.point', function(d) {
        if (interactive) chart._calls.highlightPoint(d.seriesIndex,d.pointIndex,false);
    });

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:        {get: function(){return width;}, set: function(_){width=_;}},
        height:       {get: function(){return height;}, set: function(_){height=_;}},
        xScale:       {get: function(){return x;}, set: function(_){x=_;}},
        yScale:       {get: function(){return y;}, set: function(_){y=_;}},
        pointScale:   {get: function(){return z;}, set: function(_){z=_;}},
        xDomain:      {get: function(){return xDomain;}, set: function(_){xDomain=_;}},
        yDomain:      {get: function(){return yDomain;}, set: function(_){yDomain=_;}},
        pointDomain:  {get: function(){return sizeDomain;}, set: function(_){sizeDomain=_;}},
        xRange:       {get: function(){return xRange;}, set: function(_){xRange=_;}},
        yRange:       {get: function(){return yRange;}, set: function(_){yRange=_;}},
        pointRange:   {get: function(){return sizeRange;}, set: function(_){sizeRange=_;}},
        forceX:       {get: function(){return forceX;}, set: function(_){forceX=_;}},
        forceY:       {get: function(){return forceY;}, set: function(_){forceY=_;}},
        forcePoint:   {get: function(){return forceSize;}, set: function(_){forceSize=_;}},
        interactive:  {get: function(){return interactive;}, set: function(_){interactive=_;}},
        pointActive:  {get: function(){return pointActive;}, set: function(_){pointActive=_;}},
        padDataOuter: {get: function(){return padDataOuter;}, set: function(_){padDataOuter=_;}},
        padData:      {get: function(){return padData;}, set: function(_){padData=_;}},
        clipEdge:     {get: function(){return clipEdge;}, set: function(_){clipEdge=_;}},
        clipVoronoi:  {get: function(){return clipVoronoi;}, set: function(_){clipVoronoi=_;}},
        clipRadius:   {get: function(){return clipRadius;}, set: function(_){clipRadius=_;}},
        showVoronoi:   {get: function(){return showVoronoi;}, set: function(_){showVoronoi=_;}},
        id:           {get: function(){return id;}, set: function(_){id=_;}},
        interactiveUpdateDelay: {get:function(){return interactiveUpdateDelay;}, set: function(_){interactiveUpdateDelay=_;}},
        showLabels: {get: function(){return showLabels;}, set: function(_){ showLabels = _;}},

        // simple functor options
        x:     {get: function(){return getX;}, set: function(_){getX = d3.functor(_);}},
        y:     {get: function(){return getY;}, set: function(_){getY = d3.functor(_);}},
        pointSize: {get: function(){return getSize;}, set: function(_){getSize = d3.functor(_);}},
        pointShape: {get: function(){return getShape;}, set: function(_){getShape = d3.functor(_);}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
        }},
        color: {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
        }},
        useVoronoi: {get: function(){return useVoronoi;}, set: function(_){
            useVoronoi = _;
            if (useVoronoi === false) {
                clipVoronoi = false;
            }
        }}
    });

    nv.utils.initOptions(chart);
    return chart;
};

nv.models.multiBar = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var margin = {top: 0, right: 0, bottom: 0, left: 0}
        , width = 960
        , height = 500
        , x = d3.scale.ordinal()
        , y = d3.scale.linear()
        , id = Math.floor(Math.random() * 10000) //Create semi-unique ID in case user doesn't select one
        , container = null
        , getX = function(d) { return d.x }
        , getY = function(d) { return d.y }
        , forceY = [0] // 0 is forced by default.. this makes sense for the majority of bar graphs... user can always do chart.forceY([]) to remove
        , clipEdge = true
        , stacked = false
        , stackOffset = 'zero' // options include 'silhouette', 'wiggle', 'expand', 'zero', or a custom function
        , color = nv.utils.defaultColor()
        , hideable = false
        , barColor = null // adding the ability to set the color for each rather than the whole group
        , disabled // used in conjunction with barColor to communicate from multiBarHorizontalChart what series are disabled
        , duration = 500
        , xDomain
        , yDomain
        , xRange
        , yRange
        , groupSpacing = 0.1
        , dispatch = d3.dispatch('chartClick', 'elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout', 'elementMousemove', 'renderEnd')
        ;

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var x0, y0 //used to store previous scales
        , renderWatch = nv.utils.renderWatch(dispatch, duration)
        ;

    var last_datalength = 0;

    function chart(selection) {
        renderWatch.reset();
        selection.each(function(data) {
            var availableWidth = width - margin.left - margin.right,
                availableHeight = height - margin.top - margin.bottom;

            container = d3.select(this);
            nv.utils.initSVG(container);
            var nonStackableCount = 0;
            // This function defines the requirements for render complete
            var endFn = function(d, i) {
                if (d.series === data.length - 1 && i === data[0].values.length - 1)
                    return true;
                return false;
            };

            if(hideable && data.length) hideable = [{
                values: data[0].values.map(function(d) {
                        return {
                            x: d.x,
                            y: 0,
                            series: d.series,
                            size: 0.01
                        };}
                )}];

            if (stacked) {
                var parsed = d3.layout.stack()
                    .offset(stackOffset)
                    .values(function(d){ return d.values })
                    .y(getY)
                (!data.length && hideable ? hideable : data);

                parsed.forEach(function(series, i){
                    // if series is non-stackable, use un-parsed data
                    if (series.nonStackable) {
                        data[i].nonStackableSeries = nonStackableCount++;
                        parsed[i] = data[i];
                    } else {
                        // don't stack this seires on top of the nonStackable seriees
                        if (i > 0 && parsed[i - 1].nonStackable){
                            parsed[i].values.map(function(d,j){
                                d.y0 -= parsed[i - 1].values[j].y;
                                d.y1 = d.y0 + d.y;
                            });
                        }
                    }
                });
                data = parsed;
            }
            //add series index and key to each data point for reference
            data.forEach(function(series, i) {
                series.values.forEach(function(point) {
                    point.series = i;
                    point.key = series.key;
                });
            });

            // HACK for negative value stacking
            if (stacked) {
                data[0].values.map(function(d,i) {
                    var posBase = 0, negBase = 0;
                    data.map(function(d, idx) {
                        if (!data[idx].nonStackable) {
                            var f = d.values[i]
                            f.size = Math.abs(f.y);
                            if (f.y<0)  {
                                f.y1 = negBase;
                                negBase = negBase - f.size;
                            } else
                            {
                                f.y1 = f.size + posBase;
                                posBase = posBase + f.size;
                            }
                        }

                    });
                });
            }
            // Setup Scales
            // remap and flatten the data for use in calculating the scales' domains
            var seriesData = (xDomain && yDomain) ? [] : // if we know xDomain and yDomain, no need to calculate
                data.map(function(d, idx) {
                    return d.values.map(function(d,i) {
                        return { x: getX(d,i), y: getY(d,i), y0: d.y0, y1: d.y1, idx:idx }
                    })
                });

            x.domain(xDomain || d3.merge(seriesData).map(function(d) { return d.x }))
                .rangeBands(xRange || [0, availableWidth], groupSpacing);

            y.domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) {
                var domain = d.y;
                // increase the domain range if this series is stackable
                if (stacked && !data[d.idx].nonStackable) {
                    if (d.y > 0){
                        domain = d.y1
                    } else {
                        domain = d.y1 + d.y
                    }
                }
                return domain;
            }).concat(forceY)))
            .range(yRange || [availableHeight, 0]);

            // If scale's domain don't have a range, slightly adjust to make one... so a chart can show a single data point
            if (x.domain()[0] === x.domain()[1])
                x.domain()[0] ?
                    x.domain([x.domain()[0] - x.domain()[0] * 0.01, x.domain()[1] + x.domain()[1] * 0.01])
                    : x.domain([-1,1]);

            if (y.domain()[0] === y.domain()[1])
                y.domain()[0] ?
                    y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
                    : y.domain([-1,1]);

            x0 = x0 || x;
            y0 = y0 || y;

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-multibar').data([data]);
            var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-multibar');
            var defsEnter = wrapEnter.append('defs');
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-groups');
            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            defsEnter.append('clipPath')
                .attr('id', 'nv-edge-clip-' + id)
                .append('rect');
            wrap.select('#nv-edge-clip-' + id + ' rect')
                .attr('width', availableWidth)
                .attr('height', availableHeight);

            g.attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');

            var groups = wrap.select('.nv-groups').selectAll('.nv-group')
                .data(function(d) { return d }, function(d,i) { return i });
            groups.enter().append('g')
                .style('stroke-opacity', 1e-6)
                .style('fill-opacity', 1e-6);

            var exitTransition = renderWatch
                .transition(groups.exit().selectAll('rect.nv-bar'), 'multibarExit', Math.min(100, duration))
                .attr('y', function(d, i, j) {
                    var yVal = y0(0) || 0;
                    if (stacked) {
                        if (data[d.series] && !data[d.series].nonStackable) {
                            yVal = y0(d.y0);
                        }
                    }
                    return yVal;
                })
                .attr('height', 0)
                .remove();
            if (exitTransition.delay)
                exitTransition.delay(function(d,i) {
                    var delay = i * (duration / (last_datalength + 1)) - i;
                    return delay;
                });
            groups
                .attr('class', function(d,i) { return 'nv-group nv-series-' + i })
                .classed('hover', function(d) { return d.hover })
                .style('fill', function(d,i){ return color(d, i) })
                .style('stroke', function(d,i){ return color(d, i) });
            groups
                .style('stroke-opacity', 1)
                .style('fill-opacity', 0.75);

            var bars = groups.selectAll('rect.nv-bar')
                .data(function(d) { return (hideable && !data.length) ? hideable.values : d.values });
            bars.exit().remove();

            var barsEnter = bars.enter().append('rect')
                    .attr('class', function(d,i) { return getY(d,i) < 0 ? 'nv-bar negative' : 'nv-bar positive'})
                    .attr('x', function(d,i,j) {
                        return stacked && !data[j].nonStackable ? 0 : (j * x.rangeBand() / data.length )
                    })
                    .attr('y', function(d,i,j) { return y0(stacked && !data[j].nonStackable ? d.y0 : 0) || 0 })
                    .attr('height', 0)
                    .attr('width', function(d,i,j) { return x.rangeBand() / (stacked && !data[j].nonStackable ? 1 : data.length) })
                    .attr('transform', function(d,i) { return 'translate(' + x(getX(d,i)) + ',0)'; })
                ;
            bars
                .style('fill', function(d,i,j){ return color(d, j, i);  })
                .style('stroke', function(d,i,j){ return color(d, j, i); })
                .on('mouseover', function(d,i) { //TODO: figure out why j works above, but not here
                    d3.select(this).classed('hover', true);
                    dispatch.elementMouseover({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('mouseout', function(d,i) {
                    d3.select(this).classed('hover', false);
                    dispatch.elementMouseout({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('mousemove', function(d,i) {
                    dispatch.elementMousemove({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('click', function(d,i) {
                    var element = this;
                    dispatch.elementClick({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill"),
                        event: d3.event,
                        element: element
                    });
                    d3.event.stopPropagation();
                })
                .on('dblclick', function(d,i) {
                    dispatch.elementDblClick({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                    d3.event.stopPropagation();
                });
            bars
                .attr('class', function(d,i) { return getY(d,i) < 0 ? 'nv-bar negative' : 'nv-bar positive'})
                .attr('transform', function(d,i) { return 'translate(' + x(getX(d,i)) + ',0)'; })

            if (barColor) {
                if (!disabled) disabled = data.map(function() { return true });
                bars
                    .style('fill', function(d,i,j) { return d3.rgb(barColor(d,i)).darker(  disabled.map(function(d,i) { return i }).filter(function(d,i){ return !disabled[i]  })[j]   ).toString(); })
                    .style('stroke', function(d,i,j) { return d3.rgb(barColor(d,i)).darker(  disabled.map(function(d,i) { return i }).filter(function(d,i){ return !disabled[i]  })[j]   ).toString(); });
            }

            var barSelection =
                bars.watchTransition(renderWatch, 'multibar', Math.min(250, duration))
                    .delay(function(d,i) {
                        return i * duration / data[0].values.length;
                    });
            if (stacked){
                barSelection
                    .attr('y', function(d,i,j) {
                        var yVal = 0;
                        // if stackable, stack it on top of the previous series
                        if (!data[j].nonStackable) {
                            yVal = y(d.y1);
                        } else {
                            if (getY(d,i) < 0){
                                yVal = y(0);
                            } else {
                                if (y(0) - y(getY(d,i)) < -1){
                                    yVal = y(0) - 1;
                                } else {
                                    yVal = y(getY(d, i)) || 0;
                                }
                            }
                        }
                        return yVal;
                    })
                    .attr('height', function(d,i,j) {
                        if (!data[j].nonStackable) {
                            return Math.max(Math.abs(y(d.y+d.y0) - y(d.y0)), 0);
                        } else {
                            return Math.max(Math.abs(y(getY(d,i)) - y(0)), 0) || 0;
                        }
                    })
                    .attr('x', function(d,i,j) {
                        var width = 0;
                        if (data[j].nonStackable) {
                            width = d.series * x.rangeBand() / data.length;
                            if (data.length !== nonStackableCount){
                                width = data[j].nonStackableSeries * x.rangeBand()/(nonStackableCount*2);
                            }
                        }
                        return width;
                    })
                    .attr('width', function(d,i,j){
                        if (!data[j].nonStackable) {
                            return x.rangeBand();
                        } else {
                            // if all series are nonStacable, take the full width
                            var width = (x.rangeBand() / nonStackableCount);
                            // otherwise, nonStackable graph will be only taking the half-width
                            // of the x rangeBand
                            if (data.length !== nonStackableCount) {
                                width = x.rangeBand()/(nonStackableCount*2);
                            }
                            return width;
                        }
                    });
            }
            else {
                barSelection
                    .attr('x', function(d,i) {
                        return d.series * x.rangeBand() / data.length;
                    })
                    .attr('width', x.rangeBand() / data.length)
                    .attr('y', function(d,i) {
                        return getY(d,i) < 0 ?
                            y(0) :
                                y(0) - y(getY(d,i)) < 1 ?
                            y(0) - 1 :
                            y(getY(d,i)) || 0;
                    })
                    .attr('height', function(d,i) {
                        return Math.max(Math.abs(y(getY(d,i)) - y(0)),1) || 0;
                    });
            }

            //store old scales for use in transitions on update
            x0 = x.copy();
            y0 = y.copy();

            // keep track of the last data value length for transition calculations
            if (data[0] && data[0].values) {
                last_datalength = data[0].values.length;
            }

        });

        renderWatch.renderEnd('multibar immediate');

        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;

    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:   {get: function(){return width;}, set: function(_){width=_;}},
        height:  {get: function(){return height;}, set: function(_){height=_;}},
        x:       {get: function(){return getX;}, set: function(_){getX=_;}},
        y:       {get: function(){return getY;}, set: function(_){getY=_;}},
        xScale:  {get: function(){return x;}, set: function(_){x=_;}},
        yScale:  {get: function(){return y;}, set: function(_){y=_;}},
        xDomain: {get: function(){return xDomain;}, set: function(_){xDomain=_;}},
        yDomain: {get: function(){return yDomain;}, set: function(_){yDomain=_;}},
        xRange:  {get: function(){return xRange;}, set: function(_){xRange=_;}},
        yRange:  {get: function(){return yRange;}, set: function(_){yRange=_;}},
        forceY:  {get: function(){return forceY;}, set: function(_){forceY=_;}},
        stacked: {get: function(){return stacked;}, set: function(_){stacked=_;}},
        stackOffset: {get: function(){return stackOffset;}, set: function(_){stackOffset=_;}},
        clipEdge:    {get: function(){return clipEdge;}, set: function(_){clipEdge=_;}},
        disabled:    {get: function(){return disabled;}, set: function(_){disabled=_;}},
        id:          {get: function(){return id;}, set: function(_){id=_;}},
        hideable:    {get: function(){return hideable;}, set: function(_){hideable=_;}},
        groupSpacing:{get: function(){return groupSpacing;}, set: function(_){groupSpacing=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
        }},
        barColor:  {get: function(){return barColor;}, set: function(_){
            barColor = _ ? nv.utils.getColor(_) : null;
        }}
    });

    nv.utils.initOptions(chart);

    return chart;
};nv.models.legend = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var margin = {top: 5, right: 0, bottom: 5, left: 0}
        , width = 400
        , height = 20
        , getKey = function(d) { return d.key }
        , color = nv.utils.getColor()
        , maxKeyLength = 20 //default value for key lengths
        , align = true
        , padding = 32 //define how much space between legend items. - recommend 32 for furious version
        , rightAlign = true
        , updateState = true   //If true, legend will update data.disabled and trigger a 'stateChange' dispatch.
        , radioButtonMode = false   //If true, clicking legend items will cause it to behave like a radio button. (only one can be selected at a time)
        , expanded = false
        , dispatch = d3.dispatch('legendClick', 'legendDblclick', 'legendMouseover', 'legendMouseout', 'stateChange')
        , vers = 'classic' //Options are "classic" and "furious"
        ;

    function chart(selection) {
        selection.each(function(data) {
            var availableWidth = width - margin.left - margin.right,
                container = d3.select(this);
            nv.utils.initSVG(container);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-legend').data([data]);
            var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-legend').append('g');
            var g = wrap.select('g');

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            var series = g.selectAll('.nv-series')
                .data(function(d) {
                    if(vers != 'furious') return d;

                    return d.filter(function(n) {
                        return expanded ? true : !n.disengaged;
                    });
                });

            var seriesEnter = series.enter().append('g').attr('class', 'nv-series');
            var seriesShape;

            var versPadding;
            switch(vers) {
                case 'furious' :
                    versPadding = 23;
                    break;
                case 'classic' :
                    versPadding = 20;
            }

            if(vers == 'classic') {
                seriesEnter.append('circle')
                    .style('stroke-width', 2)
                    .attr('class','nv-legend-symbol')
                    .attr('r', 5);

                seriesShape = series.select('circle');
            } else if (vers == 'furious') {
                seriesEnter.append('rect')
                    .style('stroke-width', 2)
                    .attr('class','nv-legend-symbol')
                    .attr('rx', 3)
                    .attr('ry', 3);
                seriesShape = series.select('.nv-legend-symbol');

                seriesEnter.append('g')
                    .attr('class', 'nv-check-box')
                    .property('innerHTML','<path d="M0.5,5 L22.5,5 L22.5,26.5 L0.5,26.5 L0.5,5 Z" class="nv-box"></path><path d="M5.5,12.8618467 L11.9185089,19.2803556 L31,0.198864511" class="nv-check"></path>')
                    .attr('transform', 'translate(-10,-8)scale(0.5)');

                var seriesCheckbox = series.select('.nv-check-box');

                seriesCheckbox.each(function(d,i) {
                    d3.select(this).selectAll('path')
                        .attr('stroke', setTextColor(d,i));
                });
            }

            seriesEnter.append('text')
                .attr('text-anchor', 'start')
                .attr('class','nv-legend-text')
                .attr('dy', '.32em')
                .attr('dx', '8');

            var seriesText = series.select('text.nv-legend-text');

            series
                .on('mouseover', function(d,i) {
                    dispatch.legendMouseover(d,i);  //TODO: Make consistent with other event objects
                })
                .on('mouseout', function(d,i) {
                    dispatch.legendMouseout(d,i);
                })
                .on('click', function(d,i) {
                    dispatch.legendClick(d,i);
                    // make sure we re-get data in case it was modified
                    var data = series.data();
                    if (updateState) {
                        if(vers =='classic') {
                            if (radioButtonMode) {
                                //Radio button mode: set every series to disabled,
                                //  and enable the clicked series.
                                data.forEach(function(series) { series.disabled = true});
                                d.disabled = false;
                            }
                            else {
                                d.disabled = !d.disabled;
                                if (data.every(function(series) { return series.disabled})) {
                                    //the default behavior of NVD3 legends is, if every single series
                                    // is disabled, turn all series' back on.
                                    data.forEach(function(series) { series.disabled = false});
                                }
                            }
                        } else if(vers == 'furious') {
                            if(expanded) {
                                d.disengaged = !d.disengaged;
                                d.userDisabled = d.userDisabled == undefined ? !!d.disabled : d.userDisabled;
                                d.disabled = d.disengaged || d.userDisabled;
                            } else if (!expanded) {
                                d.disabled = !d.disabled;
                                d.userDisabled = d.disabled;
                                var engaged = data.filter(function(d) { return !d.disengaged; });
                                if (engaged.every(function(series) { return series.userDisabled })) {
                                    //the default behavior of NVD3 legends is, if every single series
                                    // is disabled, turn all series' back on.
                                    data.forEach(function(series) {
                                        series.disabled = series.userDisabled = false;
                                    });
                                }
                            }
                        }
                        dispatch.stateChange({
                            disabled: data.map(function(d) { return !!d.disabled }),
                            disengaged: data.map(function(d) { return !!d.disengaged })
                        });

                    }
                })
                .on('dblclick', function(d,i) {
                    if(vers == 'furious' && expanded) return;
                    dispatch.legendDblclick(d,i);
                    if (updateState) {
                        // make sure we re-get data in case it was modified
                        var data = series.data();
                        //the default behavior of NVD3 legends, when double clicking one,
                        // is to set all other series' to false, and make the double clicked series enabled.
                        data.forEach(function(series) {
                            series.disabled = true;
                            if(vers == 'furious') series.userDisabled = series.disabled;
                        });
                        d.disabled = false;
                        if(vers == 'furious') d.userDisabled = d.disabled;
                        dispatch.stateChange({
                            disabled: data.map(function(d) { return !!d.disabled })
                        });
                    }
                });

            series.classed('nv-disabled', function(d) { return d.userDisabled });
            series.exit().remove();

            seriesText
                .attr('fill', setTextColor)
                .text(getKey);

            //TODO: implement fixed-width and max-width options (max-width is especially useful with the align option)
            // NEW ALIGNING CODE, TODO: clean up
            var legendWidth = 0;
            if (align) {

                var seriesWidths = [];
                series.each(function(d,i) {
                    var legendText;
                    if (getKey(d).length > maxKeyLength) { 
                        var trimmedKey = getKey(d).substring(0, maxKeyLength);
                        legendText = d3.select(this).select('text').text(trimmedKey + "...");
                        d3.select(this).append("svg:title").text(getKey(d));
                    } else {
                        legendText = d3.select(this).select('text');
                    } 
                    var nodeTextLength;
                    try {
                        nodeTextLength = legendText.node().getComputedTextLength();
                        // If the legendText is display:none'd (nodeTextLength == 0), simulate an error so we approximate, instead
                        if(nodeTextLength <= 0) throw Error();
                    }
                    catch(e) {
                        nodeTextLength = nv.utils.calcApproxTextWidth(legendText);
                    }

                    seriesWidths.push(nodeTextLength + padding);
                });

                var seriesPerRow = 0;
                var columnWidths = [];
                legendWidth = 0;

                while ( legendWidth < availableWidth && seriesPerRow < seriesWidths.length) {
                    columnWidths[seriesPerRow] = seriesWidths[seriesPerRow];
                    legendWidth += seriesWidths[seriesPerRow++];
                }
                if (seriesPerRow === 0) seriesPerRow = 1; //minimum of one series per row

                while ( legendWidth > availableWidth && seriesPerRow > 1 ) {
                    columnWidths = [];
                    seriesPerRow--;

                    for (var k = 0; k < seriesWidths.length; k++) {
                        if (seriesWidths[k] > (columnWidths[k % seriesPerRow] || 0) )
                            columnWidths[k % seriesPerRow] = seriesWidths[k];
                    }

                    legendWidth = columnWidths.reduce(function(prev, cur, index, array) {
                        return prev + cur;
                    });
                }

                var xPositions = [];
                for (var i = 0, curX = 0; i < seriesPerRow; i++) {
                    xPositions[i] = curX;
                    curX += columnWidths[i];
                }

                series
                    .attr('transform', function(d, i) {
                        return 'translate(' + xPositions[i % seriesPerRow] + ',' + (5 + Math.floor(i / seriesPerRow) * versPadding) + ')';
                    });

                //position legend as far right as possible within the total width
                if (rightAlign) {
                    g.attr('transform', 'translate(' + (width - margin.right - legendWidth) + ',' + margin.top + ')');
                }
                else {
                    g.attr('transform', 'translate(0' + ',' + margin.top + ')');
                }

                height = margin.top + margin.bottom + (Math.ceil(seriesWidths.length / seriesPerRow) * versPadding);

            } else {

                var ypos = 5,
                    newxpos = 5,
                    maxwidth = 0,
                    xpos;
                series
                    .attr('transform', function(d, i) {
                        var length = d3.select(this).select('text').node().getComputedTextLength() + padding;
                        xpos = newxpos;

                        if (width < margin.left + margin.right + xpos + length) {
                            newxpos = xpos = 5;
                            ypos += versPadding;
                        }

                        newxpos += length;
                        if (newxpos > maxwidth) maxwidth = newxpos;

                        if(legendWidth < xpos + maxwidth) {
                            legendWidth = xpos + maxwidth;
                        }
                        return 'translate(' + xpos + ',' + ypos + ')';
                    });

                //position legend as far right as possible within the total width
                g.attr('transform', 'translate(' + (width - margin.right - maxwidth) + ',' + margin.top + ')');

                height = margin.top + margin.bottom + ypos + 15;
            }

            if(vers == 'furious') {
                // Size rectangles after text is placed
                seriesShape
                    .attr('width', function(d,i) {
                        return seriesText[0][i].getComputedTextLength() + 27;
                    })
                    .attr('height', 18)
                    .attr('y', -9)
                    .attr('x', -15);

                // The background for the expanded legend (UI)
                gEnter.insert('rect',':first-child')
                    .attr('class', 'nv-legend-bg')
                    .attr('fill', '#eee')
                    // .attr('stroke', '#444')
                    .attr('opacity',0);

                var seriesBG = g.select('.nv-legend-bg');

                seriesBG
                .transition().duration(300)
                    .attr('x', -versPadding )
                    .attr('width', legendWidth + versPadding - 12)
                    .attr('height', height + 10)
                    .attr('y', -margin.top - 10)
                    .attr('opacity', expanded ? 1 : 0);


            }

            seriesShape
                .style('fill', setBGColor)
                .style('fill-opacity', setBGOpacity)
                .style('stroke', setBGColor);
        });

        function setTextColor(d,i) {
            if(vers != 'furious') return '#000';
            if(expanded) {
                return d.disengaged ? '#000' : '#fff';
            } else if (!expanded) {
                if(!d.color) d.color = color(d,i);
                return !!d.disabled ? d.color : '#fff';
            }
        }

        function setBGColor(d,i) {
            if(expanded && vers == 'furious') {
                return d.disengaged ? '#eee' : d.color || color(d,i);
            } else {
                return d.color || color(d,i);
            }
        }


        function setBGOpacity(d,i) {
            if(expanded && vers == 'furious') {
                return 1;
            } else {
                return !!d.disabled ? 0 : 1;
            }
        }

        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        key:        {get: function(){return getKey;}, set: function(_){getKey=_;}},
        align:      {get: function(){return align;}, set: function(_){align=_;}},
        maxKeyLength:   {get: function(){return maxKeyLength;}, set: function(_){maxKeyLength=_;}},
        rightAlign:    {get: function(){return rightAlign;}, set: function(_){rightAlign=_;}},
        padding:       {get: function(){return padding;}, set: function(_){padding=_;}},
        updateState:   {get: function(){return updateState;}, set: function(_){updateState=_;}},
        radioButtonMode:    {get: function(){return radioButtonMode;}, set: function(_){radioButtonMode=_;}},
        expanded:   {get: function(){return expanded;}, set: function(_){expanded=_;}},
        vers:   {get: function(){return vers;}, set: function(_){vers=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
        }}
    });

    nv.utils.initOptions(chart);

    return chart;
};
nv.models.lineChart = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var lines = nv.models.line()
        , xAxis = nv.models.axis()
        , yAxis = nv.models.axis()
        , legend = nv.models.legend()
        , interactiveLayer = nv.interactiveGuideline()
        , tooltip = nv.models.tooltip()
        , lines2 = nv.models.line()
        , x2Axis = nv.models.axis()
        , y2Axis = nv.models.axis()
        , brush = d3.svg.brush()
        ;

    var margin = {top: 30, right: 20, bottom: 50, left: 60}
        , margin2 = {top: 0, right: 20, bottom: 20, left: 60}
        , color = nv.utils.defaultColor()
        , width = null
        , height = null
        , showLegend = true
        , legendPosition = 'top'
        , showXAxis = true
        , showYAxis = true
        , rightAlignYAxis = false
        , useInteractiveGuideline = false
        , x
        , y
        , x2
        , y2
        , focusEnable = false
        , focusShowAxisY = false
        , focusShowAxisX = true
        , focusHeight = 50
        , brushExtent = null
        , state = nv.utils.state()
        , defaultState = null
        , noData = null
        , dispatch = d3.dispatch('tooltipShow', 'tooltipHide', 'brush', 'stateChange', 'changeState', 'renderEnd')
        , duration = 250
        ;

    // set options on sub-objects for this chart
    xAxis.orient('bottom').tickPadding(7);
    yAxis.orient(rightAlignYAxis ? 'right' : 'left');

    lines.clipEdge(true).duration(0);
    lines2.interactive(false);
    // We don't want any points emitted for the focus chart's scatter graph.
    lines2.pointActive(function(d) { return false; });

    x2Axis.orient('bottom').tickPadding(5);
    y2Axis.orient(rightAlignYAxis ? 'right' : 'left');

    tooltip.valueFormatter(function(d, i) {
        return yAxis.tickFormat()(d, i);
    }).headerFormatter(function(d, i) {
        return xAxis.tickFormat()(d, i);
    });
    
    interactiveLayer.tooltip.valueFormatter(function(d, i) {
        return yAxis.tickFormat()(d, i);
    }).headerFormatter(function(d, i) {
        return xAxis.tickFormat()(d, i);
    });


    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var renderWatch = nv.utils.renderWatch(dispatch, duration);

    var stateGetter = function(data) {
        return function(){
            return {
                active: data.map(function(d) { return !d.disabled; })
            };
        };
    };

    var stateSetter = function(data) {
        return function(state) {
            if (state.active !== undefined)
                data.forEach(function(series,i) {
                    series.disabled = !state.active[i];
                });
        };
    };

    function chart(selection) {
        renderWatch.reset();
        renderWatch.models(lines);
        renderWatch.models(lines2);
        if (showXAxis) renderWatch.models(xAxis);
        if (showYAxis) renderWatch.models(yAxis);

        if (focusShowAxisX) renderWatch.models(x2Axis);
        if (focusShowAxisY) renderWatch.models(y2Axis);
        selection.each(function(data) {
            var container = d3.select(this);
            nv.utils.initSVG(container);
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight1 = nv.utils.availableHeight(height, container, margin) - (focusEnable ? focusHeight : 0),
                availableHeight2 = focusHeight - margin2.top - margin2.bottom;

            chart.update = function() { 
                if( duration === 0 ) {
                    container.call( chart );
                } else {
                    container.transition().duration(duration).call(chart);
                }
            };
            chart.container = this;

            state
                .setter(stateSetter(data), chart.update)
                .getter(stateGetter(data))
                .update();

            // DEPRECATED set state.disabled
            state.disabled = data.map(function(d) { return !!d.disabled; });

            if (!defaultState) {
                var key;
                defaultState = {};
                for (key in state) {
                    if (state[key] instanceof Array)
                        defaultState[key] = state[key].slice(0);
                    else
                        defaultState[key] = state[key];
                }
            }

            // Display noData message if there's nothing to show.
            if (!data || !data.length || !data.filter(function(d) { return d.values.length; }).length) {
                nv.utils.noData(chart, container);
                return chart;
            } else {
                container.selectAll('.nv-noData').remove();
            }


            // Setup Scales
            x = lines.xScale();
            y = lines.yScale();
            x2 = lines2.xScale();
            y2 = lines2.yScale();

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-lineChart').data([data]);
            var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-lineChart').append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-legendWrap');

            var focusEnter = gEnter.append('g').attr('class', 'nv-focus');
            focusEnter.append('g').attr('class', 'nv-background').append('rect');
            focusEnter.append('g').attr('class', 'nv-x nv-axis');
            focusEnter.append('g').attr('class', 'nv-y nv-axis');
            focusEnter.append('g').attr('class', 'nv-linesWrap');
            focusEnter.append('g').attr('class', 'nv-interactive');

            var contextEnter = gEnter.append('g').attr('class', 'nv-context');
            contextEnter.append('g').attr('class', 'nv-background').append('rect');
            contextEnter.append('g').attr('class', 'nv-x nv-axis');
            contextEnter.append('g').attr('class', 'nv-y nv-axis');
            contextEnter.append('g').attr('class', 'nv-linesWrap');
            contextEnter.append('g').attr('class', 'nv-brushBackground');
            contextEnter.append('g').attr('class', 'nv-x nv-brush');

            // Legend
            if (!showLegend) {
                g.select('.nv-legendWrap').selectAll('*').remove();
            } else {
                legend.width(availableWidth);

                g.select('.nv-legendWrap')
                    .datum(data)
                    .call(legend);

                if (legendPosition === 'bottom') {
                    wrap.select('.nv-legendWrap')
                        .attr('transform', 'translate(0,' + (availableHeight1 + legend.height()) +')');
                } else if (legendPosition === 'top') {
                    if ( margin.top != legend.height()) {
                        margin.top = legend.height();
                        availableHeight1 = nv.utils.availableHeight(height, container, margin) - (focusEnable ? focusHeight : 0);
                    }

                    wrap.select('.nv-legendWrap')
                        .attr('transform', 'translate(0,' + (-margin.top) +')');
                }
            }

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            if (rightAlignYAxis) {
                g.select(".nv-y.nv-axis")
                    .attr("transform", "translate(" + availableWidth + ",0)");
            }

            //Set up interactive layer
            if (useInteractiveGuideline) {
                interactiveLayer
                    .width(availableWidth)
                    .height(availableHeight1)
                    .margin({left:margin.left, top:margin.top})
                    .svgContainer(container)
                    .xScale(x);
                wrap.select(".nv-interactive").call(interactiveLayer);
            }

            g.select('.nv-focus .nv-background rect')
                .attr('width', availableWidth)
                .attr('height', availableHeight1);
                
            lines
                .width(availableWidth)
                .height(availableHeight1)
                .color(data.map(function(d,i) {
                    return d.color || color(d, i);

                }).filter(function(d,i) { return !data[i].disabled; }));

            var linesWrap = g.select('.nv-linesWrap')
                .datum(data.filter(function(d) { return !d.disabled; }));


            // Setup Main (Focus) Axes
            if (showXAxis) {
                xAxis
                    .scale(x)
                    ._ticks(nv.utils.calcTicksX(availableWidth/100, data) )
                    .tickSize(-availableHeight1, 0);

            }

            if (showYAxis) {
                yAxis
                    .scale(y)
                    ._ticks( nv.utils.calcTicksY(availableHeight1/36, data) )
                    .tickSize( -availableWidth, 0);
            }

            //============================================================
            // Update Axes
            //============================================================
            function updateXAxis() {
              if(showXAxis) {
                g.select('.nv-focus .nv-x.nv-axis')
                  .transition()
                  .duration(duration)
                  .call(xAxis)
                ;
              }
            }

            function updateYAxis() {
              if(showYAxis) {
                g.select('.nv-focus .nv-y.nv-axis')
                  .transition()
                  .duration(duration)
                  .call(yAxis)
                ;
              }
            }
            
            g.select('.nv-focus .nv-x.nv-axis')
                .attr('transform', 'translate(0,' + availableHeight1 + ')');

            if( !focusEnable )
            {
                linesWrap.call(lines);
                updateXAxis();
                updateYAxis();
            }
            else
            {
                lines2
                    .defined(lines.defined())
                    .width(availableWidth)
                    .height(availableHeight2)
                    .color(data.map(function(d,i) {
                        return d.color || color(d, i);
                    }).filter(function(d,i) { return !data[i].disabled; }));
    
                g.select('.nv-context')
                    .attr('transform', 'translate(0,' + ( availableHeight1 + margin.bottom + margin2.top) + ')')
                    .style('display', focusEnable ? 'initial' : 'none')
                ;
    
                var contextLinesWrap = g.select('.nv-context .nv-linesWrap')
                    .datum(data.filter(function(d) { return !d.disabled; }))
                    ;
                    
                d3.transition(contextLinesWrap).call(lines2);
                
            
                // Setup Brush
                brush
                    .x(x2)
                    .on('brush', function() {
                        onBrush();
                    });
    
                if (brushExtent) brush.extent(brushExtent);
    
                var brushBG = g.select('.nv-brushBackground').selectAll('g')
                    .data([brushExtent || brush.extent()]);
        
                var brushBGenter = brushBG.enter()
                    .append('g');
    
                brushBGenter.append('rect')
                    .attr('class', 'left')
                    .attr('x', 0)
                    .attr('y', 0)
                    .attr('height', availableHeight2);
    
                brushBGenter.append('rect')
                    .attr('class', 'right')
                    .attr('x', 0)
                    .attr('y', 0)
                    .attr('height', availableHeight2);
    
                var gBrush = g.select('.nv-x.nv-brush')
                    .call(brush);
                gBrush.selectAll('rect')
                    .attr('height', availableHeight2);
                gBrush.selectAll('.resize').append('path').attr('d', resizePath);
    
                onBrush();
    
                g.select('.nv-context .nv-background rect')
                    .attr('width', availableWidth)
                    .attr('height', availableHeight2);
    
                // Setup Secondary (Context) Axes
                if (focusShowAxisX) {
                  x2Axis
                      .scale(x2)
                      ._ticks( nv.utils.calcTicksX(availableWidth/100, data) )
                      .tickSize(-availableHeight2, 0);
      
                  g.select('.nv-context .nv-x.nv-axis')
                      .attr('transform', 'translate(0,' + y2.range()[0] + ')');
                  d3.transition(g.select('.nv-context .nv-x.nv-axis'))
                      .call(x2Axis);
                }
    
                if (focusShowAxisY) {
                  y2Axis
                      .scale(y2)
                      ._ticks( nv.utils.calcTicksY(availableHeight2/36, data) )
                      .tickSize( -availableWidth, 0);
      
                  d3.transition(g.select('.nv-context .nv-y.nv-axis'))
                      .call(y2Axis);
                }
                
                g.select('.nv-context .nv-x.nv-axis')
                    .attr('transform', 'translate(0,' + y2.range()[0] + ')');
            }

            //============================================================
            // Event Handling/Dispatching (in chart's scope)
            //------------------------------------------------------------

            legend.dispatch.on('stateChange', function(newState) {
                for (var key in newState)
                    state[key] = newState[key];
                dispatch.stateChange(state);
                chart.update();
            });

            interactiveLayer.dispatch.on('elementMousemove', function(e) {
                lines.clearHighlights();
                var singlePoint, pointIndex, pointXLocation, allData = [];
                data
                    .filter(function(series, i) {
                        series.seriesIndex = i;
                        return !series.disabled && !series.disableTooltip;
                    })
                    .forEach(function(series,i) {
                        var extent = focusEnable ? (brush.empty() ? x2.domain() : brush.extent()) : x.domain();
                        var currentValues = series.values.filter(function(d,i) {
                            return lines.x()(d,i) >= extent[0] && lines.x()(d,i) <= extent[1];
                        });

                        pointIndex = nv.interactiveBisect(currentValues, e.pointXValue, lines.x());
                        var point = currentValues[pointIndex];
                        var pointYValue = chart.y()(point, pointIndex);
                        if (pointYValue !== null) {
                            lines.highlightPoint(series.seriesIndex, pointIndex, true);
                        }
                        if (point === undefined) return;
                        if (singlePoint === undefined) singlePoint = point;
                        if (pointXLocation === undefined) pointXLocation = chart.xScale()(chart.x()(point,pointIndex));
                        allData.push({
                            key: series.key,
                            value: pointYValue,
                            color: color(series,series.seriesIndex),
                            data: point
                        });
                    });
                //Highlight the tooltip entry based on which point the mouse is closest to.
                if (allData.length > 2) {
                    var yValue = chart.yScale().invert(e.mouseY);
                    var domainExtent = Math.abs(chart.yScale().domain()[0] - chart.yScale().domain()[1]);
                    var threshold = 0.03 * domainExtent;
                    var indexToHighlight = nv.nearestValueIndex(allData.map(function(d){return d.value;}),yValue,threshold);
                    if (indexToHighlight !== null)
                        allData[indexToHighlight].highlight = true;
                }

                var defaultValueFormatter = function(d,i) {
                    return d == null ? "N/A" : yAxis.tickFormat()(d);
                };

                interactiveLayer.tooltip
                    .chartContainer(chart.container.parentNode)
                    .valueFormatter(interactiveLayer.tooltip.valueFormatter() || defaultValueFormatter)
                    .data({
                        value: chart.x()( singlePoint,pointIndex ),
                        index: pointIndex,
                        series: allData
                    })();

                interactiveLayer.renderGuideLine(pointXLocation);

            });

            interactiveLayer.dispatch.on('elementClick', function(e) {
                var pointXLocation, allData = [];

                data.filter(function(series, i) {
                    series.seriesIndex = i;
                    return !series.disabled;
                }).forEach(function(series) {
                    var pointIndex = nv.interactiveBisect(series.values, e.pointXValue, chart.x());
                    var point = series.values[pointIndex];
                    if (typeof point === 'undefined') return;
                    if (typeof pointXLocation === 'undefined') pointXLocation = chart.xScale()(chart.x()(point,pointIndex));
                    var yPos = chart.yScale()(chart.y()(point,pointIndex));
                    allData.push({
                        point: point,
                        pointIndex: pointIndex,
                        pos: [pointXLocation, yPos],
                        seriesIndex: series.seriesIndex,
                        series: series
                    });
                });

                lines.dispatch.elementClick(allData);
            });

            interactiveLayer.dispatch.on("elementMouseout",function(e) {
                lines.clearHighlights();
            });

            dispatch.on('changeState', function(e) {
                if (typeof e.disabled !== 'undefined' && data.length === e.disabled.length) {
                    data.forEach(function(series,i) {
                        series.disabled = e.disabled[i];
                    });

                    state.disabled = e.disabled;
                }

                chart.update();
            });

            //============================================================
            // Functions
            //------------------------------------------------------------
    
            // Taken from crossfilter (http://square.github.com/crossfilter/)
            function resizePath(d) {
                var e = +(d == 'e'),
                    x = e ? 1 : -1,
                    y = availableHeight2 / 3;
                return 'M' + (0.5 * x) + ',' + y
                    + 'A6,6 0 0 ' + e + ' ' + (6.5 * x) + ',' + (y + 6)
                    + 'V' + (2 * y - 6)
                    + 'A6,6 0 0 ' + e + ' ' + (0.5 * x) + ',' + (2 * y)
                    + 'Z'
                    + 'M' + (2.5 * x) + ',' + (y + 8)
                    + 'V' + (2 * y - 8)
                    + 'M' + (4.5 * x) + ',' + (y + 8)
                    + 'V' + (2 * y - 8);
            }
    
    
            function updateBrushBG() {
                if (!brush.empty()) brush.extent(brushExtent);
                brushBG
                    .data([brush.empty() ? x2.domain() : brushExtent])
                    .each(function(d,i) {
                        var leftWidth = x2(d[0]) - x.range()[0],
                            rightWidth = availableWidth - x2(d[1]);
                        d3.select(this).select('.left')
                            .attr('width',  leftWidth < 0 ? 0 : leftWidth);
    
                        d3.select(this).select('.right')
                            .attr('x', x2(d[1]))
                            .attr('width', rightWidth < 0 ? 0 : rightWidth);
                    });
            }
    
    
            function onBrush() {
                brushExtent = brush.empty() ? null : brush.extent();
                var extent = brush.empty() ? x2.domain() : brush.extent();
    
                //The brush extent cannot be less than one.  If it is, don't update the line chart.
                if (Math.abs(extent[0] - extent[1]) <= 1) {
                    return;
                }
    
                dispatch.brush({extent: extent, brush: brush});
    
    
                updateBrushBG();
    
                // Update Main (Focus)
                var focusLinesWrap = g.select('.nv-focus .nv-linesWrap')
                    .datum(
                    data
                        .filter(function(d) { return !d.disabled; })
                        .map(function(d,i) {
                            return {
                                key: d.key,
                                area: d.area,
                                classed: d.classed,
                                values: d.values.filter(function(d,i) {
                                    return lines.x()(d,i) >= extent[0] && lines.x()(d,i) <= extent[1];
                                }),
                                disableTooltip: d.disableTooltip
                            };
                        })
                );
                focusLinesWrap.transition().duration(duration).call(lines);
    
    
                // Update Main (Focus) Axes
                updateXAxis();
                updateYAxis();
            }


        });

        renderWatch.renderEnd('lineChart immediate');
        return chart;
    }


    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------

    lines.dispatch.on('elementMouseover.tooltip', function(evt) {
        if(!evt.series.disableTooltip){
            tooltip.data(evt).hidden(false);
        }
    });

    lines.dispatch.on('elementMouseout.tooltip', function(evt) {
        tooltip.hidden(true);
    });

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    // expose chart's sub-components
    chart.dispatch = dispatch;
    chart.lines = lines;
    chart.lines2 = lines2;
    chart.legend = legend;
    chart.xAxis = xAxis;
    chart.x2Axis = x2Axis;
    chart.yAxis = yAxis;
    chart.y2Axis = y2Axis;
    chart.interactiveLayer = interactiveLayer;
    chart.tooltip = tooltip;
    chart.state = state;
    chart.dispatch = dispatch;
    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        showLegend: {get: function(){return showLegend;}, set: function(_){showLegend=_;}},
        legendPosition: {get: function(){return legendPosition;}, set: function(_){legendPosition=_;}},
        showXAxis:      {get: function(){return showXAxis;}, set: function(_){showXAxis=_;}},
        showYAxis:    {get: function(){return showYAxis;}, set: function(_){showYAxis=_;}},
        focusEnable:    {get: function(){return focusEnable;}, set: function(_){focusEnable=_;}},
        focusHeight:     {get: function(){return height2;}, set: function(_){focusHeight=_;}},
        focusShowAxisX:    {get: function(){return focusShowAxisX;}, set: function(_){focusShowAxisX=_;}},
        focusShowAxisY:    {get: function(){return focusShowAxisY;}, set: function(_){focusShowAxisY=_;}},
        brushExtent: {get: function(){return brushExtent;}, set: function(_){brushExtent=_;}},
        defaultState:    {get: function(){return defaultState;}, set: function(_){defaultState=_;}},
        noData:    {get: function(){return noData;}, set: function(_){noData=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
            lines.duration(duration);
            xAxis.duration(duration);
            x2Axis.duration(duration);
            yAxis.duration(duration);
            y2Axis.duration(duration);
        }},
        focusMargin: {get: function(){return margin2;}, set: function(_){
            margin2.top    = _.top    !== undefined ? _.top    : margin2.top;
            margin2.right  = _.right  !== undefined ? _.right  : margin2.right;
            margin2.bottom = _.bottom !== undefined ? _.bottom : margin2.bottom;
            margin2.left   = _.left   !== undefined ? _.left   : margin2.left;
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
            legend.color(color);
            lines.color(color);
        }},
        interpolate: {get: function(){return lines.interpolate();}, set: function(_){
            lines.interpolate(_);
            lines2.interpolate(_);
        }},
        xTickFormat: {get: function(){return xAxis.tickFormat();}, set: function(_){
            xAxis.tickFormat(_);
            x2Axis.tickFormat(_);
        }},
        yTickFormat: {get: function(){return yAxis.tickFormat();}, set: function(_){
            yAxis.tickFormat(_);
            y2Axis.tickFormat(_);
        }},
        x: {get: function(){return lines.x();}, set: function(_){
            lines.x(_);
            lines2.x(_);
        }},
        y: {get: function(){return lines.y();}, set: function(_){
            lines.y(_);
            lines2.y(_);
        }},
        rightAlignYAxis: {get: function(){return rightAlignYAxis;}, set: function(_){
            rightAlignYAxis = _;
            yAxis.orient( rightAlignYAxis ? 'right' : 'left');
        }},
        useInteractiveGuideline: {get: function(){return useInteractiveGuideline;}, set: function(_){
            useInteractiveGuideline = _;
            if (useInteractiveGuideline) {
                lines.interactive(false);
                lines.useVoronoi(false);
            }
        }}
    });

    nv.utils.inheritOptions(chart, lines);
    nv.utils.initOptions(chart);

    return chart;
};

nv.models.lineWithFocusChart = function() {
  return nv.models.lineChart()
    .margin({ bottom: 30 }) 
    .focusEnable( true );
};
nv.models.line = function() {
    "use strict";
    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var  scatter = nv.models.scatter()
        ;

    var margin = {top: 0, right: 0, bottom: 0, left: 0}
        , width = 960
        , height = 500
        , container = null
        , strokeWidth = 1.5
        , color = nv.utils.defaultColor() // a function that returns a color
        , getX = function(d) { return d.x } // accessor to get the x value from a data point
        , getY = function(d) { return d.y } // accessor to get the y value from a data point
        , defined = function(d,i) { return !isNaN(getY(d,i)) && getY(d,i) !== null } // allows a line to be not continuous when it is not defined
        , isArea = function(d) { return d.area } // decides if a line is an area or just a line
        , clipEdge = false // if true, masks lines within x and y scale
        , x //can be accessed via chart.xScale()
        , y //can be accessed via chart.yScale()
        , interpolate = "linear" // controls the line interpolation
        , duration = 250
        , dispatch = d3.dispatch('elementClick', 'elementMouseover', 'elementMouseout', 'renderEnd')
        ;

    scatter
        .pointSize(16) // default size
        .pointDomain([16,256]) //set to speed up calculation, needs to be unset if there is a custom size accessor
    ;

    //============================================================


    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var x0, y0 //used to store previous scales
        , renderWatch = nv.utils.renderWatch(dispatch, duration)
        ;

    //============================================================


    function chart(selection) {
        renderWatch.reset();
        renderWatch.models(scatter);
        selection.each(function(data) {
            container = d3.select(this);
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight = nv.utils.availableHeight(height, container, margin);
            nv.utils.initSVG(container);

            // Setup Scales
            x = scatter.xScale();
            y = scatter.yScale();

            x0 = x0 || x;
            y0 = y0 || y;

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-line').data([data]);
            var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-line');
            var defsEnter = wrapEnter.append('defs');
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-groups');
            gEnter.append('g').attr('class', 'nv-scatterWrap');

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            scatter
                .width(availableWidth)
                .height(availableHeight);

            var scatterWrap = wrap.select('.nv-scatterWrap');
            scatterWrap.call(scatter);

            defsEnter.append('clipPath')
                .attr('id', 'nv-edge-clip-' + scatter.id())
                .append('rect');

            wrap.select('#nv-edge-clip-' + scatter.id() + ' rect')
                .attr('width', availableWidth)
                .attr('height', (availableHeight > 0) ? availableHeight : 0);

            g   .attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + scatter.id() + ')' : '');
            scatterWrap
                .attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + scatter.id() + ')' : '');

            var groups = wrap.select('.nv-groups').selectAll('.nv-group')
                .data(function(d) { return d }, function(d) { return d.key });
            groups.enter().append('g')
                .style('stroke-opacity', 1e-6)
                .style('stroke-width', function(d) { return d.strokeWidth || strokeWidth })
                .style('fill-opacity', 1e-6);

            groups.exit().remove();

            groups
                .attr('class', function(d,i) {
                    return (d.classed || '') + ' nv-group nv-series-' + i;
                })
                .classed('hover', function(d) { return d.hover })
                .style('fill', function(d,i){ return color(d, i) })
                .style('stroke', function(d,i){ return color(d, i)});
            groups.watchTransition(renderWatch, 'line: groups')
                .style('stroke-opacity', 1)
                .style('fill-opacity', function(d) { return d.fillOpacity || .5});

            var areaPaths = groups.selectAll('path.nv-area')
                .data(function(d) { return isArea(d) ? [d] : [] }); // this is done differently than lines because I need to check if series is an area
            areaPaths.enter().append('path')
                .attr('class', 'nv-area')
                .attr('d', function(d) {
                    return d3.svg.area()
                        .interpolate(interpolate)
                        .defined(defined)
                        .x(function(d,i) { return nv.utils.NaNtoZero(x0(getX(d,i))) })
                        .y0(function(d,i) { return nv.utils.NaNtoZero(y0(getY(d,i))) })
                        .y1(function(d,i) { return y0( y.domain()[0] <= 0 ? y.domain()[1] >= 0 ? 0 : y.domain()[1] : y.domain()[0] ) })
                        //.y1(function(d,i) { return y0(0) }) //assuming 0 is within y domain.. may need to tweak this
                        .apply(this, [d.values])
                });
            groups.exit().selectAll('path.nv-area')
                .remove();

            areaPaths.watchTransition(renderWatch, 'line: areaPaths')
                .attr('d', function(d) {
                    return d3.svg.area()
                        .interpolate(interpolate)
                        .defined(defined)
                        .x(function(d,i) { return nv.utils.NaNtoZero(x(getX(d,i))) })
                        .y0(function(d,i) { return nv.utils.NaNtoZero(y(getY(d,i))) })
                        .y1(function(d,i) { return y( y.domain()[0] <= 0 ? y.domain()[1] >= 0 ? 0 : y.domain()[1] : y.domain()[0] ) })
                        //.y1(function(d,i) { return y0(0) }) //assuming 0 is within y domain.. may need to tweak this
                        .apply(this, [d.values])
                });

            var linePaths = groups.selectAll('path.nv-line')
                .data(function(d) { return [d.values] });

            linePaths.enter().append('path')
                .attr('class', 'nv-line')
                .attr('d',
                    d3.svg.line()
                    .interpolate(interpolate)
                    .defined(defined)
                    .x(function(d,i) { return nv.utils.NaNtoZero(x0(getX(d,i))) })
                    .y(function(d,i) { return nv.utils.NaNtoZero(y0(getY(d,i))) })
            );

            linePaths.watchTransition(renderWatch, 'line: linePaths')
                .attr('d',
                    d3.svg.line()
                    .interpolate(interpolate)
                    .defined(defined)
                    .x(function(d,i) { return nv.utils.NaNtoZero(x(getX(d,i))) })
                    .y(function(d,i) { return nv.utils.NaNtoZero(y(getY(d,i))) })
            );

            //store old scales for use in transitions on update
            x0 = x.copy();
            y0 = y.copy();
        });
        renderWatch.renderEnd('line immediate');
        return chart;
    }


    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.scatter = scatter;
    // Pass through events
    scatter.dispatch.on('elementClick', function(){ dispatch.elementClick.apply(this, arguments); });
    scatter.dispatch.on('elementMouseover', function(){ dispatch.elementMouseover.apply(this, arguments); });
    scatter.dispatch.on('elementMouseout', function(){ dispatch.elementMouseout.apply(this, arguments); });

    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        defined: {get: function(){return defined;}, set: function(_){defined=_;}},
        interpolate:      {get: function(){return interpolate;}, set: function(_){interpolate=_;}},
        clipEdge:    {get: function(){return clipEdge;}, set: function(_){clipEdge=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
            scatter.duration(duration);
        }},
        isArea: {get: function(){return isArea;}, set: function(_){
            isArea = d3.functor(_);
        }},
        x: {get: function(){return getX;}, set: function(_){
            getX = _;
            scatter.x(_);
        }},
        y: {get: function(){return getY;}, set: function(_){
            getY = _;
            scatter.y(_);
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
            scatter.color(color);
        }}
    });

    nv.utils.inheritOptions(chart, scatter);
    nv.utils.initOptions(chart);

    return chart;
};

nv.models.discreteBarChart = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var discretebar = nv.models.discreteBar()
        , xAxis = nv.models.axis()
        , yAxis = nv.models.axis()
	, legend = nv.models.legend()
        , tooltip = nv.models.tooltip()
        ;

    var margin = {top: 15, right: 10, bottom: 50, left: 60}
        , width = null
        , height = null
        , color = nv.utils.getColor()
	, showLegend = false
        , showXAxis = true
        , showYAxis = true
        , rightAlignYAxis = false
        , staggerLabels = false
        , wrapLabels = false
        , rotateLabels = 0
        , x
        , y
        , noData = null
        , dispatch = d3.dispatch('beforeUpdate','renderEnd')
        , duration = 250
        ;

    xAxis
        .orient('bottom')
        .showMaxMin(false)
        .tickFormat(function(d) { return d })
    ;
    yAxis
        .orient((rightAlignYAxis) ? 'right' : 'left')
        .tickFormat(d3.format(',.1f'))
    ;

    tooltip
        .duration(0)
        .headerEnabled(false)
        .valueFormatter(function(d, i) {
            return yAxis.tickFormat()(d, i);
        })
        .keyFormatter(function(d, i) {
            return xAxis.tickFormat()(d, i);
        });

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var renderWatch = nv.utils.renderWatch(dispatch, duration);

    function chart(selection) {
        renderWatch.reset();
        renderWatch.models(discretebar);
        if (showXAxis) renderWatch.models(xAxis);
        if (showYAxis) renderWatch.models(yAxis);

        selection.each(function(data) {
            var container = d3.select(this),
                that = this;
            nv.utils.initSVG(container);
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight = nv.utils.availableHeight(height, container, margin);

            chart.update = function() {
                dispatch.beforeUpdate();
                container.transition().duration(duration).call(chart);
            };
            chart.container = this;

            // Display No Data message if there's nothing to show.
            if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
                nv.utils.noData(chart, container);
                return chart;
            } else {
                container.selectAll('.nv-noData').remove();
            }

            // Setup Scales
            x = discretebar.xScale();
            y = discretebar.yScale().clamp(true);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-discreteBarWithAxes').data([data]);
            var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-discreteBarWithAxes').append('g');
            var defsEnter = gEnter.append('defs');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-x nv-axis');
            gEnter.append('g').attr('class', 'nv-y nv-axis')
                .append('g').attr('class', 'nv-zeroLine')
                .append('line');

            gEnter.append('g').attr('class', 'nv-barsWrap');
	    gEnter.append('g').attr('class', 'nv-legendWrap');

            g.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            // Legend
            if (!showLegend) {
                g.select('.nv-legendWrap').selectAll('*').remove();
            } else {
                legend.width(availableWidth);

                g.select('.nv-legendWrap')
                    .datum(data)
                    .call(legend);

                if ( margin.top != legend.height()) {
                    margin.top = legend.height();
                    availableHeight = nv.utils.availableHeight(height, container, margin);
                }

                wrap.select('.nv-legendWrap')
                    .attr('transform', 'translate(0,' + (-margin.top) +')')
            }
            
            if (rightAlignYAxis) {
                g.select(".nv-y.nv-axis")
                    .attr("transform", "translate(" + availableWidth + ",0)");
            }	    

            // Main Chart Component(s)
            discretebar
                .width(availableWidth)
                .height(availableHeight);

            var barsWrap = g.select('.nv-barsWrap')
                .datum(data.filter(function(d) { return !d.disabled }));

            barsWrap.transition().call(discretebar);


            defsEnter.append('clipPath')
                .attr('id', 'nv-x-label-clip-' + discretebar.id())
                .append('rect');

            g.select('#nv-x-label-clip-' + discretebar.id() + ' rect')
                .attr('width', x.rangeBand() * (staggerLabels ? 2 : 1))
                .attr('height', 16)
                .attr('x', -x.rangeBand() / (staggerLabels ? 1 : 2 ));

            // Setup Axes
            if (showXAxis) {
                xAxis
                    .scale(x)
                    ._ticks( nv.utils.calcTicksX(availableWidth/100, data) )
                    .tickSize(-availableHeight, 0);

                g.select('.nv-x.nv-axis')
                    .attr('transform', 'translate(0,' + (y.range()[0] + ((discretebar.showValues() && y.domain()[0] < 0) ? 16 : 0)) + ')');
                g.select('.nv-x.nv-axis').call(xAxis);

                var xTicks = g.select('.nv-x.nv-axis').selectAll('g');
                if (staggerLabels) {
                    xTicks
                        .selectAll('text')
                        .attr('transform', function(d,i,j) { return 'translate(0,' + (j % 2 == 0 ? '5' : '17') + ')' })
                }

                if (rotateLabels) {
                    xTicks
                        .selectAll('.tick text')
                        .attr('transform', 'rotate(' + rotateLabels + ' 0,0)')
                        .style('text-anchor', rotateLabels > 0 ? 'start' : 'end');
                }

                if (wrapLabels) {
                    g.selectAll('.tick text')
                        .call(nv.utils.wrapTicks, chart.xAxis.rangeBand())
                }
            }

            if (showYAxis) {
                yAxis
                    .scale(y)
                    ._ticks( nv.utils.calcTicksY(availableHeight/36, data) )
                    .tickSize( -availableWidth, 0);

                g.select('.nv-y.nv-axis').call(yAxis);
            }

            // Zero line
            g.select(".nv-zeroLine line")
                .attr("x1",0)
                .attr("x2",(rightAlignYAxis) ? -availableWidth : availableWidth)
                .attr("y1", y(0))
                .attr("y2", y(0))
            ;
        });

        renderWatch.renderEnd('discreteBar chart immediate');
        return chart;
    }

    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------

    discretebar.dispatch.on('elementMouseover.tooltip', function(evt) {
        evt['series'] = {
            key: chart.x()(evt.data),
            value: chart.y()(evt.data),
            color: evt.color
        };
        tooltip.data(evt).hidden(false);
    });

    discretebar.dispatch.on('elementMouseout.tooltip', function(evt) {
        tooltip.hidden(true);
    });

    discretebar.dispatch.on('elementMousemove.tooltip', function(evt) {
        tooltip();
    });

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.discretebar = discretebar;
    chart.legend = legend;
    chart.xAxis = xAxis;
    chart.yAxis = yAxis;
    chart.tooltip = tooltip;

    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
	showLegend: {get: function(){return showLegend;}, set: function(_){showLegend=_;}},
        staggerLabels: {get: function(){return staggerLabels;}, set: function(_){staggerLabels=_;}},
        rotateLabels:  {get: function(){return rotateLabels;}, set: function(_){rotateLabels=_;}},
        wrapLabels:  {get: function(){return wrapLabels;}, set: function(_){wrapLabels=!!_;}},
        showXAxis: {get: function(){return showXAxis;}, set: function(_){showXAxis=_;}},
        showYAxis: {get: function(){return showYAxis;}, set: function(_){showYAxis=_;}},
        noData:    {get: function(){return noData;}, set: function(_){noData=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
            discretebar.duration(duration);
            xAxis.duration(duration);
            yAxis.duration(duration);
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
            discretebar.color(color);
	    legend.color(color);
        }},
        rightAlignYAxis: {get: function(){return rightAlignYAxis;}, set: function(_){
            rightAlignYAxis = _;
            yAxis.orient( (_) ? 'right' : 'left');
        }}
    });

    nv.utils.inheritOptions(chart, discretebar);
    nv.utils.initOptions(chart);

    return chart;
}
nv.models.pieChart = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var pie = nv.models.pie();
    var legend = nv.models.legend();
    var tooltip = nv.models.tooltip();

    var margin = {top: 30, right: 20, bottom: 20, left: 20}
        , width = null
        , height = null
        , showLegend = true
        , legendPosition = "top"
        , color = nv.utils.defaultColor()
        , state = nv.utils.state()
        , defaultState = null
        , noData = null
        , duration = 250
        , dispatch = d3.dispatch('stateChange', 'changeState','renderEnd')
        ;

    tooltip
        .duration(0)
        .headerEnabled(false)
        .valueFormatter(function(d, i) {
            return pie.valueFormat()(d, i);
        });

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var renderWatch = nv.utils.renderWatch(dispatch);

    var stateGetter = function(data) {
        return function(){
            return {
                active: data.map(function(d) { return !d.disabled })
            };
        }
    };

    var stateSetter = function(data) {
        return function(state) {
            if (state.active !== undefined) {
                data.forEach(function (series, i) {
                    series.disabled = !state.active[i];
                });
            }
        }
    };

    //============================================================
    // Chart function
    //------------------------------------------------------------

    function chart(selection) {
        renderWatch.reset();
        renderWatch.models(pie);

        selection.each(function(data) {
            var container = d3.select(this);
            nv.utils.initSVG(container);

            var that = this;
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight = nv.utils.availableHeight(height, container, margin);

            chart.update = function() { container.transition().call(chart); };
            chart.container = this;

            state.setter(stateSetter(data), chart.update)
                .getter(stateGetter(data))
                .update();

            //set state.disabled
            state.disabled = data.map(function(d) { return !!d.disabled });

            if (!defaultState) {
                var key;
                defaultState = {};
                for (key in state) {
                    if (state[key] instanceof Array)
                        defaultState[key] = state[key].slice(0);
                    else
                        defaultState[key] = state[key];
                }
            }

            // Display No Data message if there's nothing to show.
            if (!data || !data.length) {
                nv.utils.noData(chart, container);
                return chart;
            } else {
                container.selectAll('.nv-noData').remove();
            }

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-pieChart').data([data]);
            var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-pieChart').append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-pieWrap');
            gEnter.append('g').attr('class', 'nv-legendWrap');

            // Legend
            if (!showLegend) {
                g.select('.nv-legendWrap').selectAll('*').remove();
            } else {
                if (legendPosition === "top") {
                    legend.width( availableWidth ).key(pie.x());

                    wrap.select('.nv-legendWrap')
                        .datum(data)
                        .call(legend);

                    if ( margin.top != legend.height()) {
                        margin.top = legend.height();
                        availableHeight = nv.utils.availableHeight(height, container, margin);
                    }

                    wrap.select('.nv-legendWrap')
                        .attr('transform', 'translate(0,' + (-margin.top) +')');
                } else if (legendPosition === "right") {
                    var legendWidth = nv.models.legend().width();
                    if (availableWidth / 2 < legendWidth) {
                        legendWidth = (availableWidth / 2)
                    }
                    legend.height(availableHeight).key(pie.x());
                    legend.width(legendWidth);
                    availableWidth -= legend.width();

                    wrap.select('.nv-legendWrap')
                        .datum(data)
                        .call(legend)
                        .attr('transform', 'translate(' + (availableWidth) +',0)');
                }
            }
            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            // Main Chart Component(s)
            pie.width(availableWidth).height(availableHeight);
            var pieWrap = g.select('.nv-pieWrap').datum([data]);
            d3.transition(pieWrap).call(pie);

            //============================================================
            // Event Handling/Dispatching (in chart's scope)
            //------------------------------------------------------------

            legend.dispatch.on('stateChange', function(newState) {
                for (var key in newState) {
                    state[key] = newState[key];
                }
                dispatch.stateChange(state);
                chart.update();
            });

            // Update chart from a state object passed to event handler
            dispatch.on('changeState', function(e) {
                if (typeof e.disabled !== 'undefined') {
                    data.forEach(function(series,i) {
                        series.disabled = e.disabled[i];
                    });
                    state.disabled = e.disabled;
                }
                chart.update();
            });
        });

        renderWatch.renderEnd('pieChart immediate');
        return chart;
    }

    //============================================================
    // Event Handling/Dispatching (out of chart's scope)
    //------------------------------------------------------------

    pie.dispatch.on('elementMouseover.tooltip', function(evt) {
        evt['series'] = {
            key: chart.x()(evt.data),
            value: chart.y()(evt.data),
            color: evt.color
        };
        tooltip.data(evt).hidden(false);
    });

    pie.dispatch.on('elementMouseout.tooltip', function(evt) {
        tooltip.hidden(true);
    });

    pie.dispatch.on('elementMousemove.tooltip', function(evt) {
        tooltip();
    });

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    // expose chart's sub-components
    chart.legend = legend;
    chart.dispatch = dispatch;
    chart.pie = pie;
    chart.tooltip = tooltip;
    chart.options = nv.utils.optionsFunc.bind(chart);

    // use Object get/set functionality to map between vars and chart functions
    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        noData:         {get: function(){return noData;},         set: function(_){noData=_;}},
        showLegend:     {get: function(){return showLegend;},     set: function(_){showLegend=_;}},
        legendPosition: {get: function(){return legendPosition;}, set: function(_){legendPosition=_;}},
        defaultState:   {get: function(){return defaultState;},   set: function(_){defaultState=_;}},

        // options that require extra logic in the setter
        color: {get: function(){return color;}, set: function(_){
            color = _;
            legend.color(color);
            pie.color(color);
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
        }},
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }}
    });
    nv.utils.inheritOptions(chart, pie);
    nv.utils.initOptions(chart);
    return chart;
};
//TODO: consider deprecating by adding necessary features to multiBar model
nv.models.discreteBar = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var margin = {top: 0, right: 0, bottom: 0, left: 0}
        , width = 960
        , height = 500
        , id = Math.floor(Math.random() * 10000) //Create semi-unique ID in case user doesn't select one
        , container
        , x = d3.scale.ordinal()
        , y = d3.scale.linear()
        , getX = function(d) { return d.x }
        , getY = function(d) { return d.y }
        , forceY = [0] // 0 is forced by default.. this makes sense for the majority of bar graphs... user can always do chart.forceY([]) to remove
        , color = nv.utils.defaultColor()
        , showValues = false
        , valueFormat = d3.format(',.2f')
        , xDomain
        , yDomain
        , xRange
        , yRange
        , dispatch = d3.dispatch('chartClick', 'elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout', 'elementMousemove', 'renderEnd')
        , rectClass = 'discreteBar'
        , duration = 250
        ;

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var x0, y0;
    var renderWatch = nv.utils.renderWatch(dispatch, duration);

    function chart(selection) {
        renderWatch.reset();
        selection.each(function(data) {
            var availableWidth = width - margin.left - margin.right,
                availableHeight = height - margin.top - margin.bottom;

            container = d3.select(this);
            nv.utils.initSVG(container);

            //add series index to each data point for reference
            data.forEach(function(series, i) {
                series.values.forEach(function(point) {
                    point.series = i;
                });
            });

            // Setup Scales
            // remap and flatten the data for use in calculating the scales' domains
            var seriesData = (xDomain && yDomain) ? [] : // if we know xDomain and yDomain, no need to calculate
                data.map(function(d) {
                    return d.values.map(function(d,i) {
                        return { x: getX(d,i), y: getY(d,i), y0: d.y0 }
                    })
                });

            x   .domain(xDomain || d3.merge(seriesData).map(function(d) { return d.x }))
                .rangeBands(xRange || [0, availableWidth], .1);
            y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return d.y }).concat(forceY)));

            // If showValues, pad the Y axis range to account for label height
            if (showValues) y.range(yRange || [availableHeight - (y.domain()[0] < 0 ? 12 : 0), y.domain()[1] > 0 ? 12 : 0]);
            else y.range(yRange || [availableHeight, 0]);

            //store old scales if they exist
            x0 = x0 || x;
            y0 = y0 || y.copy().range([y(0),y(0)]);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-discretebar').data([data]);
            var wrapEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-discretebar');
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-groups');
            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');

            //TODO: by definition, the discrete bar should not have multiple groups, will modify/remove later
            var groups = wrap.select('.nv-groups').selectAll('.nv-group')
                .data(function(d) { return d }, function(d) { return d.key });
            groups.enter().append('g')
                .style('stroke-opacity', 1e-6)
                .style('fill-opacity', 1e-6);
            groups.exit()
                .watchTransition(renderWatch, 'discreteBar: exit groups')
                .style('stroke-opacity', 1e-6)
                .style('fill-opacity', 1e-6)
                .remove();
            groups
                .attr('class', function(d,i) { return 'nv-group nv-series-' + i })
                .classed('hover', function(d) { return d.hover });
            groups
                .watchTransition(renderWatch, 'discreteBar: groups')
                .style('stroke-opacity', 1)
                .style('fill-opacity', .75);

            var bars = groups.selectAll('g.nv-bar')
                .data(function(d) { return d.values });
            bars.exit().remove();

            var barsEnter = bars.enter().append('g')
                .attr('transform', function(d,i,j) {
                    return 'translate(' + (x(getX(d,i)) + x.rangeBand() * .05 ) + ', ' + y(0) + ')'
                })
                .on('mouseover', function(d,i) { //TODO: figure out why j works above, but not here
                    d3.select(this).classed('hover', true);
                    dispatch.elementMouseover({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('mouseout', function(d,i) {
                    d3.select(this).classed('hover', false);
                    dispatch.elementMouseout({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('mousemove', function(d,i) {
                    dispatch.elementMousemove({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                })
                .on('click', function(d,i) {
                    var element = this;
                    dispatch.elementClick({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill"),
                        event: d3.event,
                        element: element
                    });
                    d3.event.stopPropagation();
                })
                .on('dblclick', function(d,i) {
                    dispatch.elementDblClick({
                        data: d,
                        index: i,
                        color: d3.select(this).style("fill")
                    });
                    d3.event.stopPropagation();
                });

            barsEnter.append('rect')
                .attr('height', 0)
                .attr('width', x.rangeBand() * .9 / data.length )

            if (showValues) {
                barsEnter.append('text')
                    .attr('text-anchor', 'middle')
                ;

                bars.select('text')
                    .text(function(d,i) { return valueFormat(getY(d,i)) })
                    .watchTransition(renderWatch, 'discreteBar: bars text')
                    .attr('x', x.rangeBand() * .9 / 2)
                    .attr('y', function(d,i) { return getY(d,i) < 0 ? y(getY(d,i)) - y(0) + 12 : -4 })

                ;
            } else {
                bars.selectAll('text').remove();
            }

            bars
                .attr('class', function(d,i) { return getY(d,i) < 0 ? 'nv-bar negative' : 'nv-bar positive' })
                .style('fill', function(d,i) { return d.color || color(d,i) })
                .style('stroke', function(d,i) { return d.color || color(d,i) })
                .select('rect')
                .attr('class', rectClass)
                .watchTransition(renderWatch, 'discreteBar: bars rect')
                .attr('width', x.rangeBand() * .9 / data.length);
            bars.watchTransition(renderWatch, 'discreteBar: bars')
                //.delay(function(d,i) { return i * 1200 / data[0].values.length })
                .attr('transform', function(d,i) {
                    var left = x(getX(d,i)) + x.rangeBand() * .05,
                        top = getY(d,i) < 0 ?
                            y(0) :
                                y(0) - y(getY(d,i)) < 1 ?
                            y(0) - 1 : //make 1 px positive bars show up above y=0
                            y(getY(d,i));

                    return 'translate(' + left + ', ' + top + ')'
                })
                .select('rect')
                .attr('height', function(d,i) {
                    return  Math.max(Math.abs(y(getY(d,i)) - y(0)), 1)
                });


            //store old scales for use in transitions on update
            x0 = x.copy();
            y0 = y.copy();

        });

        renderWatch.renderEnd('discreteBar immediate');
        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:   {get: function(){return width;}, set: function(_){width=_;}},
        height:  {get: function(){return height;}, set: function(_){height=_;}},
        forceY:  {get: function(){return forceY;}, set: function(_){forceY=_;}},
        showValues: {get: function(){return showValues;}, set: function(_){showValues=_;}},
        x:       {get: function(){return getX;}, set: function(_){getX=_;}},
        y:       {get: function(){return getY;}, set: function(_){getY=_;}},
        xScale:  {get: function(){return x;}, set: function(_){x=_;}},
        yScale:  {get: function(){return y;}, set: function(_){y=_;}},
        xDomain: {get: function(){return xDomain;}, set: function(_){xDomain=_;}},
        yDomain: {get: function(){return yDomain;}, set: function(_){yDomain=_;}},
        xRange:  {get: function(){return xRange;}, set: function(_){xRange=_;}},
        yRange:  {get: function(){return yRange;}, set: function(_){yRange=_;}},
        valueFormat:    {get: function(){return valueFormat;}, set: function(_){valueFormat=_;}},
        id:          {get: function(){return id;}, set: function(_){id=_;}},
        rectClass: {get: function(){return rectClass;}, set: function(_){rectClass=_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            renderWatch.reset(duration);
        }}
    });

    nv.utils.initOptions(chart);

    return chart;
};
nv.models.multiBarChart = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var multibar = nv.models.multiBar()
        , xAxis = nv.models.axis()
        , yAxis = nv.models.axis()
        , interactiveLayer = nv.interactiveGuideline()
        , legend = nv.models.legend()
        , controls = nv.models.legend()
        , tooltip = nv.models.tooltip()
        ;

    var margin = {top: 30, right: 20, bottom: 50, left: 60}
        , width = null
        , height = null
        , color = nv.utils.defaultColor()
        , showControls = true
        , controlLabels = {}
        , showLegend = true
        , showXAxis = true
        , showYAxis = true
        , rightAlignYAxis = false
        , reduceXTicks = true // if false a tick will show for every data point
        , staggerLabels = false
        , wrapLabels = false
        , rotateLabels = 0
        , x //can be accessed via chart.xScale()
        , y //can be accessed via chart.yScale()
        , state = nv.utils.state()
        , defaultState = null
        , noData = null
        , dispatch = d3.dispatch('stateChange', 'changeState', 'renderEnd')
        , controlWidth = function() { return showControls ? 180 : 0 }
        , duration = 250
        , useInteractiveGuideline = false
        ;

    state.stacked = false // DEPRECATED Maintained for backward compatibility

    multibar.stacked(false);
    xAxis
        .orient('bottom')
        .tickPadding(7)
        .showMaxMin(false)
        .tickFormat(function(d) { return d })
    ;
    yAxis
        .orient((rightAlignYAxis) ? 'right' : 'left')
        .tickFormat(d3.format(',.1f'))
    ;

    tooltip
        .duration(0)
        .valueFormatter(function(d, i) {
            return yAxis.tickFormat()(d, i);
        })
        .headerFormatter(function(d, i) {
            return xAxis.tickFormat()(d, i);
        });

    controls.updateState(false);

    //============================================================
    // Private Variables
    //------------------------------------------------------------

    var renderWatch = nv.utils.renderWatch(dispatch);
    var stacked = false;

    var stateGetter = function(data) {
        return function(){
            return {
                active: data.map(function(d) { return !d.disabled }),
                stacked: stacked
            };
        }
    };

    var stateSetter = function(data) {
        return function(state) {
            if (state.stacked !== undefined)
                stacked = state.stacked;
            if (state.active !== undefined)
                data.forEach(function(series,i) {
                    series.disabled = !state.active[i];
                });
        }
    };

    function chart(selection) {
        renderWatch.reset();
        renderWatch.models(multibar);
        if (showXAxis) renderWatch.models(xAxis);
        if (showYAxis) renderWatch.models(yAxis);

        selection.each(function(data) {
            var container = d3.select(this),
                that = this;
            nv.utils.initSVG(container);
            var availableWidth = nv.utils.availableWidth(width, container, margin),
                availableHeight = nv.utils.availableHeight(height, container, margin);

            chart.update = function() {
                if (duration === 0)
                    container.call(chart);
                else
                    container.transition()
                        .duration(duration)
                        .call(chart);
            };
            chart.container = this;

            state
                .setter(stateSetter(data), chart.update)
                .getter(stateGetter(data))
                .update();

            // DEPRECATED set state.disableddisabled
            state.disabled = data.map(function(d) { return !!d.disabled });

            if (!defaultState) {
                var key;
                defaultState = {};
                for (key in state) {
                    if (state[key] instanceof Array)
                        defaultState[key] = state[key].slice(0);
                    else
                        defaultState[key] = state[key];
                }
            }

            // Display noData message if there's nothing to show.
            if (!data || !data.length || !data.filter(function(d) { return d.values.length }).length) {
                nv.utils.noData(chart, container)
                return chart;
            } else {
                container.selectAll('.nv-noData').remove();
            }

            // Setup Scales
            x = multibar.xScale();
            y = multibar.yScale();

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('g.nv-wrap.nv-multiBarWithLegend').data([data]);
            var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-wrap nv-multiBarWithLegend').append('g');
            var g = wrap.select('g');

            gEnter.append('g').attr('class', 'nv-x nv-axis');
            gEnter.append('g').attr('class', 'nv-y nv-axis');
            gEnter.append('g').attr('class', 'nv-barsWrap');
            gEnter.append('g').attr('class', 'nv-legendWrap');
            gEnter.append('g').attr('class', 'nv-controlsWrap');
            gEnter.append('g').attr('class', 'nv-interactive');

            // Legend
            if (!showLegend) {
                g.select('.nv-legendWrap').selectAll('*').remove();
            } else {
                legend.width(availableWidth - controlWidth());

                g.select('.nv-legendWrap')
                    .datum(data)
                    .call(legend);

                if ( margin.top != legend.height()) {
                    margin.top = legend.height();
                    availableHeight = nv.utils.availableHeight(height, container, margin);
                }

                g.select('.nv-legendWrap')
                    .attr('transform', 'translate(' + controlWidth() + ',' + (-margin.top) +')');
            }

            // Controls
            if (!showControls) {
                 g.select('.nv-controlsWrap').selectAll('*').remove();
            } else {
                var controlsData = [
                    { key: controlLabels.grouped || 'Grouped', disabled: multibar.stacked() },
                    { key: controlLabels.stacked || 'Stacked', disabled: !multibar.stacked() }
                ];

                controls.width(controlWidth()).color(['#444', '#444', '#444']);
                g.select('.nv-controlsWrap')
                    .datum(controlsData)
                    .attr('transform', 'translate(0,' + (-margin.top) +')')
                    .call(controls);
            }

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
            if (rightAlignYAxis) {
                g.select(".nv-y.nv-axis")
                    .attr("transform", "translate(" + availableWidth + ",0)");
            }

            // Main Chart Component(s)
            multibar
                .disabled(data.map(function(series) { return series.disabled }))
                .width(availableWidth)
                .height(availableHeight)
                .color(data.map(function(d,i) {
                    return d.color || color(d, i);
                }).filter(function(d,i) { return !data[i].disabled }));


            var barsWrap = g.select('.nv-barsWrap')
                .datum(data.filter(function(d) { return !d.disabled }));

            barsWrap.call(multibar);

            // Setup Axes
            if (showXAxis) {
                xAxis
                    .scale(x)
                    ._ticks( nv.utils.calcTicksX(availableWidth/100, data) )
                    .tickSize(-availableHeight, 0);

                g.select('.nv-x.nv-axis')
                    .attr('transform', 'translate(0,' + y.range()[0] + ')');
                g.select('.nv-x.nv-axis')
                    .call(xAxis);

                var xTicks = g.select('.nv-x.nv-axis > g').selectAll('g');

                xTicks
                    .selectAll('line, text')
                    .style('opacity', 1)

                if (staggerLabels) {
                    var getTranslate = function(x,y) {
                        return "translate(" + x + "," + y + ")";
                    };

                    var staggerUp = 5, staggerDown = 17;  //pixels to stagger by
                    // Issue #140
                    xTicks
                        .selectAll("text")
                        .attr('transform', function(d,i,j) {
                            return  getTranslate(0, (j % 2 == 0 ? staggerUp : staggerDown));
                        });

                    var totalInBetweenTicks = d3.selectAll(".nv-x.nv-axis .nv-wrap g g text")[0].length;
                    g.selectAll(".nv-x.nv-axis .nv-axisMaxMin text")
                        .attr("transform", function(d,i) {
                            return getTranslate(0, (i === 0 || totalInBetweenTicks % 2 !== 0) ? staggerDown : staggerUp);
                        });
                }

                if (wrapLabels) {
                    g.selectAll('.tick text')
                        .call(nv.utils.wrapTicks, chart.xAxis.rangeBand())
                }

                if (reduceXTicks)
                    xTicks
                        .filter(function(d,i) {
                            return i % Math.ceil(data[0].values.length / (availableWidth / 100)) !== 0;
                        })
                        .selectAll('text, line')
                        .style('opacity', 0);

                if(rotateLabels)
                    xTicks
                        .selectAll('.tick text')
                        .attr('transform', 'rotate(' + rotateLabels + ' 0,0)')
                        .style('text-anchor', rotateLabels > 0 ? 'start' : 'end');

                g.select('.nv-x.nv-axis').selectAll('g.nv-axisMaxMin text')
                    .style('opacity', 1);
            }

            if (showYAxis) {
                yAxis
                    .scale(y)
                    ._ticks( nv.utils.calcTicksY(availableHeight/36, data) )
                    .tickSize( -availableWidth, 0);

                g.select('.nv-y.nv-axis')
                    .call(yAxis);
            }

            //Set up interactive layer
            if (useInteractiveGuideline) {
                interactiveLayer
                    .width(availableWidth)
                    .height(availableHeight)
                    .margin({left:margin.left, top:margin.top})
                    .svgContainer(container)
                    .xScale(x);
                wrap.select(".nv-interactive").call(interactiveLayer);
            }

            //============================================================
            // Event Handling/Dispatching (in chart's scope)
            //------------------------------------------------------------

            legend.dispatch.on('stateChange', function(newState) {
                for (var key in newState)
                    state[key] = newState[key];
                dispatch.stateChange(state);
                chart.update();
            });

            controls.dispatch.on('legendClick', function(d,i) {
                if (!d.disabled) return;
                controlsData = controlsData.map(function(s) {
                    s.disabled = true;
                    return s;
                });
                d.disabled = false;

                switch (d.key) {
                    case 'Grouped':
                    case controlLabels.grouped:
                        multibar.stacked(false);
                        break;
                    case 'Stacked':
                    case controlLabels.stacked:
                        multibar.stacked(true);
                        break;
                }

                state.stacked = multibar.stacked();
                dispatch.stateChange(state);
                chart.update();
            });

            // Update chart from a state object passed to event handler
            dispatch.on('changeState', function(e) {
                if (typeof e.disabled !== 'undefined') {
                    data.forEach(function(series,i) {
                        series.disabled = e.disabled[i];
                    });
                    state.disabled = e.disabled;
                }
                if (typeof e.stacked !== 'undefined') {
                    multibar.stacked(e.stacked);
                    state.stacked = e.stacked;
                    stacked = e.stacked;
                }
                chart.update();
            });

            if (useInteractiveGuideline) {
                interactiveLayer.dispatch.on('elementMousemove', function(e) {
                    if (e.pointXValue == undefined) return;

                    var singlePoint, pointIndex, pointXLocation, xValue, allData = [];
                    data
                        .filter(function(series, i) {
                            series.seriesIndex = i;
                            return !series.disabled;
                        })
                        .forEach(function(series,i) {
                            pointIndex = x.domain().indexOf(e.pointXValue)

                            var point = series.values[pointIndex];
                            if (point === undefined) return;

                            xValue = point.x;
                            if (singlePoint === undefined) singlePoint = point;
                            if (pointXLocation === undefined) pointXLocation = e.mouseX
                            allData.push({
                                key: series.key,
                                value: chart.y()(point, pointIndex),
                                color: color(series,series.seriesIndex),
                                data: series.values[pointIndex]
                            });
                        });

                    interactiveLayer.tooltip
                        .chartContainer(that.parentNode)
                        .data({
                            value: xValue,
                            index: pointIndex,
                            series: allData
                        })();

                    interactiveLayer.renderGuideLine(pointXLocation);
                });

                interactiveLayer.dispatch.on("elementMouseout",function(e) {
                    interactiveLayer.tooltip.hidden(true);
                });
            }
            else {
                multibar.dispatch.on('elementMouseover.tooltip', function(evt) {
                    evt.value = chart.x()(evt.data);
                    evt['series'] = {
                        key: evt.data.key,
                        value: chart.y()(evt.data),
                        color: evt.color
                    };
                    tooltip.data(evt).hidden(false);
                });

                multibar.dispatch.on('elementMouseout.tooltip', function(evt) {
                    tooltip.hidden(true);
                });

                multibar.dispatch.on('elementMousemove.tooltip', function(evt) {
                    tooltip();
                });
            }
        });

        renderWatch.renderEnd('multibarchart immediate');
        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    // expose chart's sub-components
    chart.dispatch = dispatch;
    chart.multibar = multibar;
    chart.legend = legend;
    chart.controls = controls;
    chart.xAxis = xAxis;
    chart.yAxis = yAxis;
    chart.state = state;
    chart.tooltip = tooltip;
    chart.interactiveLayer = interactiveLayer;

    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        showLegend: {get: function(){return showLegend;}, set: function(_){showLegend=_;}},
        showControls: {get: function(){return showControls;}, set: function(_){showControls=_;}},
        controlLabels: {get: function(){return controlLabels;}, set: function(_){controlLabels=_;}},
        showXAxis:      {get: function(){return showXAxis;}, set: function(_){showXAxis=_;}},
        showYAxis:    {get: function(){return showYAxis;}, set: function(_){showYAxis=_;}},
        defaultState:    {get: function(){return defaultState;}, set: function(_){defaultState=_;}},
        noData:    {get: function(){return noData;}, set: function(_){noData=_;}},
        reduceXTicks:    {get: function(){return reduceXTicks;}, set: function(_){reduceXTicks=_;}},
        rotateLabels:    {get: function(){return rotateLabels;}, set: function(_){rotateLabels=_;}},
        staggerLabels:    {get: function(){return staggerLabels;}, set: function(_){staggerLabels=_;}},
        wrapLabels:   {get: function(){return wrapLabels;}, set: function(_){wrapLabels=!!_;}},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = _.top    !== undefined ? _.top    : margin.top;
            margin.right  = _.right  !== undefined ? _.right  : margin.right;
            margin.bottom = _.bottom !== undefined ? _.bottom : margin.bottom;
            margin.left   = _.left   !== undefined ? _.left   : margin.left;
        }},
        duration: {get: function(){return duration;}, set: function(_){
            duration = _;
            multibar.duration(duration);
            xAxis.duration(duration);
            yAxis.duration(duration);
            renderWatch.reset(duration);
        }},
        color:  {get: function(){return color;}, set: function(_){
            color = nv.utils.getColor(_);
            legend.color(color);
        }},
        rightAlignYAxis: {get: function(){return rightAlignYAxis;}, set: function(_){
            rightAlignYAxis = _;
            yAxis.orient( rightAlignYAxis ? 'right' : 'left');
        }},
        useInteractiveGuideline: {get: function(){return useInteractiveGuideline;}, set: function(_){
            useInteractiveGuideline = _;
        }},
        barColor:  {get: function(){return multibar.barColor;}, set: function(_){
            multibar.barColor(_);
            legend.color(function(d,i) {return d3.rgb('#ccc').darker(i * 1.5).toString();})
        }}
    });

    nv.utils.inheritOptions(chart, multibar);
    nv.utils.initOptions(chart);

    return chart;
};
nv.models.pie = function() {
    "use strict";

    //============================================================
    // Public Variables with Default Settings
    //------------------------------------------------------------

    var margin = {top: 0, right: 0, bottom: 0, left: 0}
        , width = 500
        , height = 500
        , getX = function(d) { return d.x }
        , getY = function(d) { return d.y }
        , id = Math.floor(Math.random() * 10000) //Create semi-unique ID in case user doesn't select one
        , container = null
        , color = nv.utils.defaultColor()
        , valueFormat = d3.format(',.2f')
        , showLabels = true
        , labelsOutside = false
        , labelType = "key"
        , labelThreshold = .02 //if slice percentage is under this, don't show label
        , donut = false
        , title = false
        , growOnHover = true
        , titleOffset = 0
        , labelSunbeamLayout = false
        , startAngle = false
        , padAngle = false
        , endAngle = false
        , cornerRadius = 0
        , donutRatio = 0.5
        , arcsRadius = []
        , dispatch = d3.dispatch('chartClick', 'elementClick', 'elementDblClick', 'elementMouseover', 'elementMouseout', 'elementMousemove', 'renderEnd')
        ;

    var arcs = [];
    var arcsOver = [];

    //============================================================
    // chart function
    //------------------------------------------------------------

    var renderWatch = nv.utils.renderWatch(dispatch);

    function chart(selection) {
        renderWatch.reset();
        selection.each(function(data) {
            var availableWidth = width - margin.left - margin.right
                , availableHeight = height - margin.top - margin.bottom
                , radius = Math.min(availableWidth, availableHeight) / 2
                , arcsRadiusOuter = []
                , arcsRadiusInner = []
                ;

            container = d3.select(this)
            if (arcsRadius.length === 0) {
                var outer = radius - radius / 5;
                var inner = donutRatio * radius;
                for (var i = 0; i < data[0].length; i++) {
                    arcsRadiusOuter.push(outer);
                    arcsRadiusInner.push(inner);
                }
            } else {
                if(growOnHover){
                    arcsRadiusOuter = arcsRadius.map(function (d) { return (d.outer - d.outer / 5) * radius; });
                    arcsRadiusInner = arcsRadius.map(function (d) { return (d.inner - d.inner / 5) * radius; });
                    donutRatio = d3.min(arcsRadius.map(function (d) { return (d.inner - d.inner / 5); }));
                } else {
                    arcsRadiusOuter = arcsRadius.map(function (d) { return d.outer * radius; });
                    arcsRadiusInner = arcsRadius.map(function (d) { return d.inner * radius; });
                    donutRatio = d3.min(arcsRadius.map(function (d) { return d.inner; }));
                }
            }
            nv.utils.initSVG(container);

            // Setup containers and skeleton of chart
            var wrap = container.selectAll('.nv-wrap.nv-pie').data(data);
            var wrapEnter = wrap.enter().append('g').attr('class','nvd3 nv-wrap nv-pie nv-chart-' + id);
            var gEnter = wrapEnter.append('g');
            var g = wrap.select('g');
            var g_pie = gEnter.append('g').attr('class', 'nv-pie');
            gEnter.append('g').attr('class', 'nv-pieLabels');

            wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
            g.select('.nv-pie').attr('transform', 'translate(' + availableWidth / 2 + ',' + availableHeight / 2 + ')');
            g.select('.nv-pieLabels').attr('transform', 'translate(' + availableWidth / 2 + ',' + availableHeight / 2 + ')');

            //
            container.on('click', function(d,i) {
                dispatch.chartClick({
                    data: d,
                    index: i,
                    pos: d3.event,
                    id: id
                });
            });

            arcs = [];
            arcsOver = [];
            for (var i = 0; i < data[0].length; i++) {

                var arc = d3.svg.arc().outerRadius(arcsRadiusOuter[i]);
                var arcOver = d3.svg.arc().outerRadius(arcsRadiusOuter[i] + 5);

                if (startAngle !== false) {
                    arc.startAngle(startAngle);
                    arcOver.startAngle(startAngle);
                }
                if (endAngle !== false) {
                    arc.endAngle(endAngle);
                    arcOver.endAngle(endAngle);
                }
                if (donut) {
                    arc.innerRadius(arcsRadiusInner[i]);
                    arcOver.innerRadius(arcsRadiusInner[i]);
                }

                if (arc.cornerRadius && cornerRadius) {
                    arc.cornerRadius(cornerRadius);
                    arcOver.cornerRadius(cornerRadius);
                }

                arcs.push(arc);
                arcsOver.push(arcOver);
            }

            // Setup the Pie chart and choose the data element
            var pie = d3.layout.pie()
                .sort(null)
                .value(function(d) { return d.disabled ? 0 : getY(d) });

            // padAngle added in d3 3.5
            if (pie.padAngle && padAngle) {
                pie.padAngle(padAngle);
            }

            // if title is specified and donut, put it in the middle
            if (donut && title) {
                g_pie.append("text").attr('class', 'nv-pie-title');

                wrap.select('.nv-pie-title')
                    .style("text-anchor", "middle")
                    .text(function (d) {
                        return title;
                    })
                    .style("font-size", (Math.min(availableWidth, availableHeight)) * donutRatio * 2 / (title.length + 2) + "px")
                    .attr("dy", "0.35em") // trick to vertically center text
                    .attr('transform', function(d, i) {
                        return 'translate(0, '+ titleOffset + ')';
                    });
            }

            var slices = wrap.select('.nv-pie').selectAll('.nv-slice').data(pie);
            var pieLabels = wrap.select('.nv-pieLabels').selectAll('.nv-label').data(pie);

            slices.exit().remove();
            pieLabels.exit().remove();

            var ae = slices.enter().append('g');
            ae.attr('class', 'nv-slice');
            ae.on('mouseover', function(d, i) {
                d3.select(this).classed('hover', true);
                if (growOnHover) {
                    d3.select(this).select("path").transition()
                        .duration(70)
                        .attr("d", arcsOver[i]);
                }
                dispatch.elementMouseover({
                    data: d.data,
                    index: i,
                    color: d3.select(this).style("fill")
                });
            });
            ae.on('mouseout', function(d, i) {
                d3.select(this).classed('hover', false);
                if (growOnHover) {
                    d3.select(this).select("path").transition()
                        .duration(50)
                        .attr("d", arcs[i]);
                }
                dispatch.elementMouseout({data: d.data, index: i});
            });
            ae.on('mousemove', function(d, i) {
                dispatch.elementMousemove({data: d.data, index: i});
            });
            ae.on('click', function(d, i) {
                var element = this;
                dispatch.elementClick({
                    data: d.data,
                    index: i,
                    color: d3.select(this).style("fill"),
                    event: d3.event,
                    element: element
                });
            });
            ae.on('dblclick', function(d, i) {
                dispatch.elementDblClick({
                    data: d.data,
                    index: i,
                    color: d3.select(this).style("fill")
                });
            });

            slices.attr('fill', function(d,i) { return color(d.data, i); });
            slices.attr('stroke', function(d,i) { return color(d.data, i); });

            var paths = ae.append('path').each(function(d) {
                this._current = d;
            });

            slices.select('path')
                .transition()
                .attr('d', function (d, i) { return arcs[i](d); })
                .attrTween('d', arcTween);

            if (showLabels) {
                // This does the normal label
                var labelsArc = [];
                for (var i = 0; i < data[0].length; i++) {
                    labelsArc.push(arcs[i]);

                    if (labelsOutside) {
                        if (donut) {
                            labelsArc[i] = d3.svg.arc().outerRadius(arcs[i].outerRadius());
                            if (startAngle !== false) labelsArc[i].startAngle(startAngle);
                            if (endAngle !== false) labelsArc[i].endAngle(endAngle);
                        }
                    } else if (!donut) {
                            labelsArc[i].innerRadius(0);
                    }
                }

                pieLabels.enter().append("g").classed("nv-label",true).each(function(d,i) {
                    var group = d3.select(this);

                    group.attr('transform', function (d, i) {
                        if (labelSunbeamLayout) {
                            d.outerRadius = arcsRadiusOuter[i] + 10; // Set Outer Coordinate
                            d.innerRadius = arcsRadiusOuter[i] + 15; // Set Inner Coordinate
                            var rotateAngle = (d.startAngle + d.endAngle) / 2 * (180 / Math.PI);
                            if ((d.startAngle + d.endAngle) / 2 < Math.PI) {
                                rotateAngle -= 90;
                            } else {
                                rotateAngle += 90;
                            }
                            return 'translate(' + labelsArc[i].centroid(d) + ') rotate(' + rotateAngle + ')';
                        } else {
                            d.outerRadius = radius + 10; // Set Outer Coordinate
                            d.innerRadius = radius + 15; // Set Inner Coordinate
                            return 'translate(' + labelsArc[i].centroid(d) + ')'
                        }
                    });

                    group.append('rect')
                        .style('stroke', '#fff')
                        .style('fill', '#fff')
                        .attr("rx", 3)
                        .attr("ry", 3);

                    group.append('text')
                        .style('text-anchor', labelSunbeamLayout ? ((d.startAngle + d.endAngle) / 2 < Math.PI ? 'start' : 'end') : 'middle') //center the text on it's origin or begin/end if orthogonal aligned
                        .style('fill', '#000')
                });

                var labelLocationHash = {};
                var avgHeight = 14;
                var avgWidth = 140;
                var createHashKey = function(coordinates) {
                    return Math.floor(coordinates[0]/avgWidth) * avgWidth + ',' + Math.floor(coordinates[1]/avgHeight) * avgHeight;
                };
                var getSlicePercentage = function(d) {
                    return (d.endAngle - d.startAngle) / (2 * Math.PI);
                };

                pieLabels.watchTransition(renderWatch, 'pie labels').attr('transform', function (d, i) {
                    if (labelSunbeamLayout) {
                        d.outerRadius = arcsRadiusOuter[i] + 10; // Set Outer Coordinate
                        d.innerRadius = arcsRadiusOuter[i] + 15; // Set Inner Coordinate
                        var rotateAngle = (d.startAngle + d.endAngle) / 2 * (180 / Math.PI);
                        if ((d.startAngle + d.endAngle) / 2 < Math.PI) {
                            rotateAngle -= 90;
                        } else {
                            rotateAngle += 90;
                        }
                        return 'translate(' + labelsArc[i].centroid(d) + ') rotate(' + rotateAngle + ')';
                    } else {
                        d.outerRadius = radius + 10; // Set Outer Coordinate
                        d.innerRadius = radius + 15; // Set Inner Coordinate

                        /*
                        Overlapping pie labels are not good. What this attempts to do is, prevent overlapping.
                        Each label location is hashed, and if a hash collision occurs, we assume an overlap.
                        Adjust the label's y-position to remove the overlap.
                        */
                        var center = labelsArc[i].centroid(d);
                        var percent = getSlicePercentage(d);
                        if (d.value && percent >= labelThreshold) {
                            var hashKey = createHashKey(center);
                            if (labelLocationHash[hashKey]) {
                                center[1] -= avgHeight;
                            }
                            labelLocationHash[createHashKey(center)] = true;
                        }
                        return 'translate(' + center + ')'
                    }
                });

                pieLabels.select(".nv-label text")
                    .style('text-anchor', function(d,i) {
                        //center the text on it's origin or begin/end if orthogonal aligned
                        return labelSunbeamLayout ? ((d.startAngle + d.endAngle) / 2 < Math.PI ? 'start' : 'end') : 'middle';
                    })
                    .text(function(d, i) {
                        var percent = getSlicePercentage(d);
                        var label = '';
                        if (!d.value || percent < labelThreshold) return '';

                        if(typeof labelType === 'function') {
                            label = labelType(d, i, {
                                'key': getX(d.data),
                                'value': getY(d.data),
                                'percent': valueFormat(percent)
                            });
                        } else {
                            switch (labelType) {
                                case 'key':
                                    label = getX(d.data);
                                    break;
                                case 'value':
                                    label = valueFormat(getY(d.data));
                                    break;
                                case 'percent':
                                    label = d3.format('%')(percent);
                                    break;
                            }
                        }
                        return label;
                    })
                ;
            }


            // Computes the angle of an arc, converting from radians to degrees.
            function angle(d) {
                var a = (d.startAngle + d.endAngle) * 90 / Math.PI - 90;
                return a > 90 ? a - 180 : a;
            }

            function arcTween(a, idx) {
                a.endAngle = isNaN(a.endAngle) ? 0 : a.endAngle;
                a.startAngle = isNaN(a.startAngle) ? 0 : a.startAngle;
                if (!donut) a.innerRadius = 0;
                var i = d3.interpolate(this._current, a);
                this._current = i(0);
                return function (t) {
                    return arcs[idx](i(t));
                };
            }
        });

        renderWatch.renderEnd('pie immediate');
        return chart;
    }

    //============================================================
    // Expose Public Variables
    //------------------------------------------------------------

    chart.dispatch = dispatch;
    chart.options = nv.utils.optionsFunc.bind(chart);

    chart._options = Object.create({}, {
        // simple options, just get/set the necessary values
        arcsRadius: { get: function () { return arcsRadius; }, set: function (_) { arcsRadius = _; } },
        width:      {get: function(){return width;}, set: function(_){width=_;}},
        height:     {get: function(){return height;}, set: function(_){height=_;}},
        showLabels: {get: function(){return showLabels;}, set: function(_){showLabels=_;}},
        title:      {get: function(){return title;}, set: function(_){title=_;}},
        titleOffset:    {get: function(){return titleOffset;}, set: function(_){titleOffset=_;}},
        labelThreshold: {get: function(){return labelThreshold;}, set: function(_){labelThreshold=_;}},
        valueFormat:    {get: function(){return valueFormat;}, set: function(_){valueFormat=_;}},
        x:          {get: function(){return getX;}, set: function(_){getX=_;}},
        id:         {get: function(){return id;}, set: function(_){id=_;}},
        endAngle:   {get: function(){return endAngle;}, set: function(_){endAngle=_;}},
        startAngle: {get: function(){return startAngle;}, set: function(_){startAngle=_;}},
        padAngle:   {get: function(){return padAngle;}, set: function(_){padAngle=_;}},
        cornerRadius: {get: function(){return cornerRadius;}, set: function(_){cornerRadius=_;}},
        donutRatio:   {get: function(){return donutRatio;}, set: function(_){donutRatio=_;}},
        labelsOutside: {get: function(){return labelsOutside;}, set: function(_){labelsOutside=_;}},
        labelSunbeamLayout: {get: function(){return labelSunbeamLayout;}, set: function(_){labelSunbeamLayout=_;}},
        donut:              {get: function(){return donut;}, set: function(_){donut=_;}},
        growOnHover:        {get: function(){return growOnHover;}, set: function(_){growOnHover=_;}},

        // depreciated after 1.7.1
        pieLabelsOutside: {get: function(){return labelsOutside;}, set: function(_){
            labelsOutside=_;
            nv.deprecated('pieLabelsOutside', 'use labelsOutside instead');
        }},
        // depreciated after 1.7.1
        donutLabelsOutside: {get: function(){return labelsOutside;}, set: function(_){
            labelsOutside=_;
            nv.deprecated('donutLabelsOutside', 'use labelsOutside instead');
        }},
        // deprecated after 1.7.1
        labelFormat: {get: function(){ return valueFormat;}, set: function(_) {
            valueFormat=_;
            nv.deprecated('labelFormat','use valueFormat instead');
        }},

        // options that require extra logic in the setter
        margin: {get: function(){return margin;}, set: function(_){
            margin.top    = typeof _.top    != 'undefined' ? _.top    : margin.top;
            margin.right  = typeof _.right  != 'undefined' ? _.right  : margin.right;
            margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
            margin.left   = typeof _.left   != 'undefined' ? _.left   : margin.left;
        }},
        y: {get: function(){return getY;}, set: function(_){
            getY=d3.functor(_);
        }},
        color: {get: function(){return color;}, set: function(_){
            color=nv.utils.getColor(_);
        }},
        labelType:          {get: function(){return labelType;}, set: function(_){
            labelType= _ || 'key';
        }}
    });

    nv.utils.initOptions(chart);
    return chart;
};

nv.version = "1.8.2-dev";
})();