gistfile1.xml

        <record model="ir.ui.view" id="inventory_view_form">
            <field name="model">inventory.inventory</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <![CDATA[
                    <form string="Inventory" col="4">
                        <label name="warehouse"/>
                        <field name="warehouse"/>
                        <label name="lost_found"/>
                        <field name="lost_found"/>
                        <label name="date"/>
                        <field name="date"/>
                        <label name="company"/>
                        <field name="company"/>
                        <label colspan="2" id="empty"/>
                        <button string="Complete Inventory" type="action"
                            name="%(wizard_complete_inventory)d"
                            states="{'readonly': Or(Not(Equal(Eval('state'), 'draft')), Not(Bool(Eval('warehouse'))))}"
                            colspan="2"
                            help="Add inventory lines with the specified products and locations."/>
                        <field name="lines" colspan="4"/>
                        <group col="4" colspan="4" id="group_buttons">
                            <label name="state"/>
                            <field name="state"/>
                            <group colspan="2" col="3" id="buttons">
                                <button string="Cancel"
                                    name="cancel"
                                    states="{'invisible': In(Eval('state'), ['cancel', 'done']), 'readonly': Not(In(%(stock.group_stock)d, Eval('groups', [])))}"
                                    icon="tryton-cancel" />
                                <button string="Confirm"
                                    name="done"
                                    states="{'invisible': In(Eval('state'), ['done','cancel']), 'readonly': Not(In(%(stock.group_stock)d, Eval('groups', [])))}"
                                    icon="tryton-ok"/>
                            </group>
                        </group>
                    </form>
                ]]>
            </field>
        </record>