test.xml

<record id="estate_property_view_form" model="ir.ui.view">
    <field name="name">estate.property.form</field>
    <field name="model">estate.property</field>
    <field name="arch" type="xml">
        <form>
            <header>
                <button name="action_sold" type="object" string="Sold" states="new,offer_received" />
                <button name="action_sold" type="object" string="Sold" states="offer_accepted" class="oe_highlight" />
                <button name="action_cancel" type="object" string="Cancel" states="new,offer_received,offer_accepted" />
                <field name="state" widget="statusbar" statusbar_visible="new,offer_received,offer_accepted,sold" />
            </header>
            <sheet>
                <div class="oe_title">
                    <h1>
                        <field name="name" />
                    </h1>
                    <field name="tag_ids" widget="many2many_tags" options="{'color_field': 'color'}" />
                </div>
                <group>
                    <group>
                        <field name="property_type_id" options="{'no_create': True, 'no_edit': True}" />
                        <field name="postcode" />
                        <field name="date_availability" />
                    </group>
                    <group>
                        <field name="expected_price" />
                        <field name="best_price" />
                        <field name="selling_price" />
                    </group>
                </group>
                <notebook>
                    <page string="Description">
                        <group>
                            <group>
                                <field name="description" />
                                <field name="bedrooms" />
                                <field name="living_area" />
                                <field name="facades" />
                                <field name="garage" />
                                <field name="garden" />
                                <field name="garden_area" attrs="{'invisible': [('garden', '=', False)]}" />
                                <field name="garden_orientation" attrs="{'invisible': [('garden', '=', False)]}" />
                                <field name="total_area" />
                            </group>
                        </group>
                    </page>
                    <page string="Offers">
                        <field name="offer_ids" attrs="{'readonly': [('state', 'in', ('offer_accepted', 'sold', 'canceled'))]}" />
                    </page>
                </notebook>
            </sheet>
        </form>
    </field>
</record>