calendar_holiday/views/hr_contract_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="hr_contract_view_tree_inh_calendarholiday" model="ir.ui.view">
            <field name="name">hr.contract.view.tree.inh.calendarholiday</field>
            <field name="model">hr.contract</field>
            <field name="inherit_id" ref="hr_contract.hr_contract_view_tree"/>
            <field name="arch" type="xml">
                <field name="date_end" position="after">
                    <field name="partner"/>
                </field>
            </field>
        </record>
        <record id="hr_contract_view_search_inh_calendarholiday" model="ir.ui.view">
            <field name="name">hr.contract.view.search.inh.calendarholiday</field>
            <field name="model">hr.contract</field>
            <field name="inherit_id" ref="hr_contract.hr_contract_view_search"/>
            <field name="arch" type="xml">
                <field name="employee_id" position="after">
                    <field name="partner"/>
                </field>
                <filter string="Employee" position="after">
                    <filter string="Associated to" icon="terp-personal" domain="[]" context="{'group_by':'partner'}"/>
                </filter>
            </field>
        </record>
        <record id="hr_contract_view_form_inh_calendarholiday" model="ir.ui.view">
            <field name="name">hr.contract.view.form.inh.calendarholiday</field>
            <field name="model">hr.contract</field>
            <field name="inherit_id" ref="hr_contract.hr_contract_view_form"/>
            <field name="arch" type="xml">
                <field name="type_id" position="after">
                    <field name="partner" readonly="1"/>
                </field>
                <page string="Work Permit" position="after">
                    <page string="Holiday calendars" attrs="{'invisible':[('partner','=',False)]}">
                        <group colspan="4" col="10">
                            <group colspan="10">
                                <button name="%(action_calculate_workables_festives)d" type="action"
                                    string="Calculate workables and festives in the calendar of the employee"/>
                            </group>
                            <group name ="holiday_calendars" colspan="10">
                                <separator string="Holiday calendars" colspan="10" />
                                <field name="holiday_calendars" nolabel="1" colspan="10" />
                            </group>
                        </group>
                    </page>
                </page>
                <sheet position="after">
                    <div class="oe_chatter">
                        <field name="message_follower_ids" widget="mail_followers" groups="base.group_user"/>
                        <field name="message_ids" widget="mail_thread"/>
                    </div>
                </sheet>
            </field>
        </record>
    </data>
</openerp>