michel_coworking/coworking_event/views/event_views.xml

<?xml version="1.0" encoding="utf-8"?>

<odoo>
<!-- Form -->
  <record id="view_form_event" model="ir.ui.view">
    <field name="name">Event Form</field>
    <field name="model">coworking.event</field>
    <field name="arch" type="xml">
      <form string="event">
        <header>
          <field name="statut" widget="statusbar" clickable="1" />
        </header>
        <sheet>
          <group name="group_top">
            <group name="group_left">
              <field name="title" />
              <field name="manager_id" />
              <field name="date_start" />
              <field name="starts_this_week" attrs="{'invisible': [('date_start', '=', True)]}" />
              <field name="date_end" />
              <field name="duration" widget="float_time" />
              <field name="description" />
              <field name="participants_ids" widget="many2many_tags"
                options="{'no_create': true}" />
            </group>
          </group>
        </sheet>
      </form>
    </field>
  </record>

  <!-- Tree -->
  <record id="view_tree_coworker" model="ir.ui.view">
    <field name="name">event Tree</field>
    <field name="model">coworking.event</field>
    <field name="arch" type="xml">
      <tree default_order="date_start asc">
        <field name="title" />
        <field name="manager_id" />
        <field name="date_start" />
        <field name="participants_count" />
        <field name="statut" />
      </tree>
    </field>
  </record>

  <!-- Search -->
    <record id="view_search_event" model="ir.ui.view">
      <field name="name">Event Search</field>
      <field name="model">coworking.event</field>
      <field name="arch" type="xml">
        <search>
          <field name="title" />
          <field name="manager_id" />

          <filter name="status_confirmed" string="Confirmed"
            domain="[('statut','=','confirmed')]" />
          <filter name="status_draft" string="Draft"
            domain="[('statut','=','draft')]" />
          <filter name="canceled" string="Canceled"
            domain="[('statut','=','canceled')]" />

          <separator />
          <filter name="this_week" string="Starts this week"
            domain="[('starts_this_week','=', True)]" />

          <filter name="this_30_month" string="Starts 30 month"
            domain="[('date_start','&lt;=', datetime.datetime.combine(context_today() + datetime.timedelta(days=30), datetime.time(23,59,59))),
            ('date_start','&gt;=', datetime.datetime.combine(context_today(), datetime.time(0,0,0)))]" />

          <filter name="group_status" string="Group status"
            context="{'group_by': 'statut'}" />
          <filter name="group_manager_id" string="Group manager"
            context="{'group_by': 'manager_id'}" />
          <filter name="group_years_start" string="Group years start"
            context="{'group_by': 'date_start:year'}" />

          <filter name="group_month" string="Group month"
            context="{'group_by': 'date_start:month'}" />

        </search>
      </field>
    </record>
    <!-- Calendar -->
    <record id="view_calendar_event" model="ir.ui.view">
      <field name="name">Event Calendar</field>
      <field name="model">coworking.event</field>
      <field name="arch" type="xml">
        <calendar date_start="date_start" date_stop="date_end"
          display="[title]" >
          <field name="title" />
        </calendar>
      </field>
    </record>

</odoo>