enterprise-addons/hr_payroll/views/hr_payroll_headcount_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="hr_payroll_headcount_view_form" model="ir.ui.view">
        <field name="name">hr.payroll.headcount.view.form</field>
        <field name="model">hr.payroll.headcount</field>
        <field name="arch" type="xml">
            <form string="Headcount">
                <header>
                    <button string="Populate" name="action_populate" class="btn-primary" type="object" data-hotkey="q" invisible="line_ids"/>
                    <button string="Populate" name="action_populate" class="btn-secondary" type="object" data-hotkey="q" invisible="not line_ids"/>
                </header>
                <sheet>
                    <div class="oe_button_box" name="button_box">
                        <button name="action_open_lines" type="object" class="oe_stat_button" icon="fa-users" invisible="not employee_count">
                            <div class="o_field_widget o_stat_info">
                                <span class="o_stat_value"><field name="employee_count"/></span>
                                <span class="o_stat_text">Employees</span>
                            </div>
                        </button>
                    </div>
                    <field name="display_name" invisible="True"/>
                    <div class="row" >
                        <h1 class="d-flex flex-row"><field name="name"/></h1>
                    </div>
                    <group>
                        <group>
                            <group>
                                <field name="company_id" groups="base.group_multi_company" readonly="line_ids" placeholder="Visible to all"/>
                                <field name="date_from"/>
                                <field name="date_to"/>
                            </group>
                        </group>
                    </group>
                </sheet>
            </form>
        </field>
    </record>

    <record id="hr_payroll_headcount_view_tree" model="ir.ui.view">
        <field name="name">hr.payroll.headcount.view.list</field>
        <field name="model">hr.payroll.headcount</field>
        <field name="arch" type="xml">
            <list string="Headcount">
                <field name="name"/>
                <field name="create_uid" widget="many2one_avatar_user"/>
                <field name="write_date"/>
                <field name="employee_count"/>
                <field name="company_id" groups="base.group_multi_company"/>
            </list>
        </field>
    </record>

    <record id="hr_payroll_headcount_view_search" model="ir.ui.view">
        <field name="name">hr.payroll.headcount.view.search</field>
        <field name="model">hr.payroll.headcount</field>
        <field name="arch" type="xml">
            <search string="Search Headcount">
                <field name="name"/>
                <field name="create_uid"/>
                <field name="write_date"/>
                <field name="employee_count"/>
                <field name="company_id"/>
            </search>
        </field>
    </record>

    <record id="hr_payroll_headcount_line_view_tree" model="ir.ui.view">
        <field name="name">hr.payroll.headcount.line.view.list</field>
        <field name="model">hr.payroll.headcount.line</field>
        <field name="arch" type="xml">
            <list string="Headcount's Employees">
                <field name="employee_id" widget="many2one_avatar_employee"/>
                <field name="department_id" widget="many2one"/>
                <field name="job_id" widget="many2one"/>
                <field name="currency_id" column_invisible="True"/>
                <field name="wage_on_payroll"/>
                <field name="employee_type" optional="hide"/>
                <field name="version_names" optional="hide"/>
                <field name="working_rate_ids" widget="many2many_tags" options="{'color_field': 'color'}" optional="hide"/>
            </list>
        </field>
    </record>

    <record id="hr_payroll_headcount_line_search" model="ir.ui.view">
        <field name="name">hr.payroll.headcount.line.search</field>
        <field name="model">hr.payroll.headcount.line</field>
        <field name="arch" type="xml">
            <search string="Search Headcount">
                <field name="employee_id"/>
                <field name="department_id"/>
                <field name="job_id"/>
                <group>
                    <filter string="Department" name="group_by_department" domain="[]" context="{'group_by': 'department_id'}"/>
                    <filter string="Job" name="group_by_job" domain="[]" context="{'group_by': 'job_id'}"/>
                    <filter string="Working Rate" name="group_by_Working_rate" domain="[]" context="{'group_by': 'working_rate_ids'}"/>
                    <filter string="Employee Type" name="group_by_employee_type" domain="[]" context="{'group_by': 'employee_type'}"/>
                </group>
            </search>
        </field>
    </record>

    <record id="hr_payroll_headcount_action" model="ir.actions.act_window">
        <field name="name">Headcount</field>
        <field name="res_model">hr.payroll.headcount</field>
        <field name="view_mode">list,form</field>
        <field name="target">current</field>
        <field name="help" type="html">
            <p class="o_view_nocontent_smiling_face">
            No previous headcounts have been found.
            </p><p>
            An Headcount report will provide you the quantity of running contracts<br/>
            on a specific period of time, grouped by Department.<br/><br/>
            </p>
        </field>
    </record>
</odoo>