odoo/addons/hr_holidays/report/available_holidays_view.xml

<?xml version="1.0"?>
<openerp>
    <data>

<!-- available holidays report -->

        <record id="view_hr_available_holidays_report_tree" model="ir.ui.view">
            <field name="name">available.holidays.report.tree</field>
            <field name="model">available.holidays.report</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
               <tree string="Available Holidays">
                    <field name="employee_id" invisible="1"/>
                    <field name="user_id" invisible="1"/>
                    <field name="category_id" invisible="1"/>
                    <field name="holiday_status_id" invisible="1"/>
                    <field name="department_id" invisible="1"/>
                    <field name="day" invisible="1"/>
                    <field name="month" invisible="1"/>
                    <field name="year" invisible="1"/>
                    <field name="date" invisible="1"/>
                    <field name="state" invisible="1"/>
                    <field name="max_leave" sum="Allocated Leaves"/>
                    <field name="taken_leaves" sum="Taken Leaves"/>
                    <field name="remaining_leave" sum="Remaining Leaves"/>
                </tree>
            </field>
        </record>

        <record id="view_hr_available_holidays_report_graph" model="ir.ui.view">
            <field name="name">available.holidays.report.graph</field>
            <field name="model">available.holidays.report</field>
            <field name="type">graph</field>
            <field name="arch" type="xml">
                <graph string="Available Holidays" type="bar">
                    <field name="holiday_status_id"/>
                    <field name="taken_leaves" string="Taken Leaves" operator="+"/>
                    <field name="max_leave" string="Allocated Leaves" operator="+"/>
                </graph>
            </field>
        </record>

        <record id="view_hr_available_holidays_report_search" model="ir.ui.view">
            <field name="name">available.holidays.report.search</field>
            <field name="model">available.holidays.report</field>
            <field name="type">search</field>
            <field name="arch" type="xml">
                <search string="Leaves">
                    <group>
                        <filter icon="terp-go-year" string=" Year " domain="[('date','&lt;=', time.strftime('%%Y-%%m-%%d')),('date','&gt;=',time.strftime('%%Y-01-01'))]" help="Available Leaves of current year"/>
                        <filter icon="terp-go-month" string=" Month " name="month"
                                domain="[('date','&lt;=',(datetime.date.today()+relativedelta(day=31)).strftime('%%Y-%%m-%%d')),('date','&gt;=',(datetime.date.today()-relativedelta(day=1)).strftime('%%Y-%%m-%%d'))]"
                                help="Available Leaves of current month"/>
                        <filter icon="terp-go-month" string="    Month-1    " separator="1"
                                domain="[('date','&lt;=', (datetime.date.today() - relativedelta(day=31, months=1)).strftime('%%Y-%%m-%%d')),('date','&gt;=',(datetime.date.today() - relativedelta(day=1,months=1)).strftime('%%Y-%%m-%%d'))]"
                                help="Available Leaves of last month"/>
                        <separator orientation="vertical"/>
                        <filter string="Validated" icon="terp-camera_test" domain="[('state','=','validate')]"/>
                        <separator orientation="vertical"/>
                    <field name="employee_id"/>
                    </group>
                    <newline/>
                    <group expand="0" string="Extended Filters..." colspan="10" col="12">
                        <field name="holiday_status_id" widget="selection"/>
                        <field name="department_id" widget="selection"/>
                    </group>
                    <newline/>
                    <group expand="1" string="Group By..." colspan="10" col="12">
                        <filter icon="terp-personal" string="Employee"
                          name="user" context="{'group_by':'employee_id'}"
                          help="Leaves by employee"/>
                        <filter string="Validation User" name="User" icon="terp-personal" context="{'group_by':'user_id'}"/>
                        <separator orientation="vertical"/>
                        <filter string="Department" icon="terp-personal+" context="{'group_by':'department_id'}"/>
                       <separator orientation="vertical"/>
                        <filter icon="terp-stock_symbol-selection" string="Category" context="{'group_by':'category_id'}"
                            help="Leaves by category"/>
                        <filter string="Type" icon="terp-stock_symbol-selection" context="{'group_by':'holiday_status_id'}"/>
                        <separator orientation="vertical"/>
                        <filter string="State" icon="terp-stock_effects-object-colorize" context="{'group_by':'state'}"/>
                           <separator orientation="vertical"/>
                        <filter string="Day" icon="terp-go-today" context="{'group_by':'day'}"/>
                        <filter string="Month" icon="terp-go-month" context="{'group_by':'month'}"/>
                        <filter string="Year" icon="terp-go-year" context="{'group_by':'year'}"/>
                    </group>
                </search>
            </field>
        </record>

        <record id="action_hr_available_holidays_report" model="ir.actions.act_window">
            <field name="name">Leaves Analysis</field>
            <field name="res_model">available.holidays.report</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,graph</field>
            <field name="context">{'search_default_month':1,'search_default_user':1,'group_by':[], 'group_by_no_leaf':1}</field>
            <field name="view_id" ref="view_hr_available_holidays_report_search"/>
        </record>

        <record model="ir.actions.act_window.view" id="action_hr_available_holidays_report_tree">
                <field name="sequence" eval="1"/>
                <field name="view_mode">tree</field>
                <field name="view_id" ref="view_hr_available_holidays_report_tree"/>
                <field name="act_window_id" ref="action_hr_available_holidays_report"/>
        </record>

        <record model="ir.actions.act_window.view" id="action_hr_available_holidays_report_graph">
                <field name="sequence" eval="2"/>
                <field name="view_mode">graph</field>
                <field name="view_id" ref="view_hr_available_holidays_report_graph"/>
                <field name="act_window_id" ref="action_hr_available_holidays_report"/>
        </record>

        <menuitem name="Leaves Analysis" id="menu_hr_available_holidays_report_tree" action="action_hr_available_holidays_report" parent="menu_hr_reporting_holidays"/>

    </data>
</openerp>