odoo/addons/purchase/purchase_view.xml

<?xml version="1.0" encoding="utf-8"?>
<terp>
    <data>
        <menuitem icon="terp-purchase" id="menu_purchase_root" name="Purchase Management"/>

       <record model="ir.ui.view" id="purchase_order_calendar">
            <field name="name">purchase.order.calendar</field>
            <field name="model">purchase.order</field>
            <field name="type">calendar</field>
            <field name="priority" eval="2"/>
            <field name="arch" type="xml">
                <calendar string="Calendar View" date_start="minimum_planned_date" color="partner_id">
                    <field name="name"/>
                    <field name="amount_total"/>
                    <field name="partner_id"/>
                </calendar>
            </field>
        </record>

        <record id="purchase_order_form" model="ir.ui.view">
            <field name="name">purchase.order.form</field>
            <field name="model">purchase.order</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Purchase Order">
                    <group col="6" colspan="4">
                        <field name="name" select="1"/>
                        <field name="shipped" select="2"/>
                        <field name="invoiced" select="2"/>
                        <newline/>
                        <field name="warehouse_id" on_change="onchange_warehouse_id(warehouse_id)"/>
                        <field name="origin" select="2"/>
                        <field name="date_order" select="2"/>
                    </group>
                    <notebook colspan="4">
                        <page string="Purchase Order">
                            <field name="partner_id" on_change="onchange_partner_id(partner_id)" select="1" domain="[('supplier','=', 1)]"/>
                            <field name="partner_address_id"/>
                            <field domain="[('type','=','purchase')]" name="pricelist_id"/>
                            <field name="partner_ref" select="2"/>
                            <newline/>
                            <field colspan="4" name="order_line" nolabel="1" widget="one2many_list"/>
                            <group col="7" colspan="4">
                                <field name="amount_untaxed" sum="Untaxed amount"/>
                                <field name="amount_tax"/>
                                <field name="amount_total" sum="Total amount"/>
                                <button name="button_dummy" states="draft" string="Compute" type="object"/>
                            </group>
                            <group col="9" colspan="4">
                                <field name="state" readonly="1"/>
                                <button name="purchase_confirm" states="draft" string="Confirm Purchase Order"/>
                                <button name="purchase_appbuyer" states="wait_auth" string="Approve Purchase"/>
                                <button name="purchase_approve" states="confirmed" string="Approved by Supplier"/>
                                <button name="purchase_cancel" states="draft,confirmed,wait_auth" string="Cancel Purchase Order"/>

                                <button name="purchase_cancel" states="approved" string="Cancel Purchase Order"/>

                                <button name="shipping_ok" states="except_shipping" string="Shipping Done"/>
                                <button name="invoice_ok" states="except_invoice" string="Invoice Done"/>
                            </group>
                        </page>
                        <page string="Delivery &amp; Invoices">
                            <separator string="Delivery" colspan="2"/>
                            <separator string="Invoice Control" colspan="2"/>
                            <field name="dest_address_id" on_change="onchange_dest_address_id(dest_address_id)"/>
                            <field name="invoice_method"/>
                            <field name="minimum_planned_date"/>
                            <field name="location_id"/>
                            <newline/>
                            <separator string="Purchase Control" colspan="4"/>
                            <field name="validator"/>
                            <field name="date_approve"/>
                        </page>
                        <page string="Notes">
                            <field colspan="4" name="notes" nolabel="1"/>
                        </page>
                    </notebook>
                </form>
            </field>
        </record>

        <record id="purchase_form_action" model="ir.actions.act_window">
            <field name="name">Purchase Orders</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">purchase.order</field>
            <field name="view_mode">tree,calendar,form</field>
        </record>
        <menuitem action="purchase_form_action" id="menu_purchase_form_action" parent="purchase.menu_purchase_root"/>

        <record id="purchase_form_action2" model="ir.actions.act_window">
            <field name="name">Request For Quotations</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">purchase.order</field>
            <field name="domain">[('state','=','draft')]</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,calendar,form</field>
        </record>
        <menuitem action="purchase_form_action2" id="menu_purchase_order_draft" parent="purchase.menu_purchase_form_action"/>

        <record id="purchase_form_action3" model="ir.actions.act_window">
            <field name="name">Purchase Order Waiting Approval</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">purchase.order</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,calendar,form</field>
            <field name="domain">[('state','=','confirmed')]</field>
        </record>
        <menuitem action="purchase_form_action3" id="menu_purchase_form_action3" parent="purchase.menu_purchase_form_action"/>

        <record id="purchase_form_action4" model="ir.actions.act_window">
            <field name="name">Purchase Orders in Progress</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">purchase.order</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,calendar,form</field>
            <field name="domain">[('state','=','approved')]</field>
        </record>
        <menuitem action="purchase_form_action4" id="menu_purchase_form_action4" parent="purchase.menu_purchase_form_action"/>

        <record id="purchase_form_action_new" model="ir.actions.act_window">
            <field name="name">New Purchase Order</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">purchase.order</field>
            <field name="view_mode">form,tree</field>
        </record>
        <menuitem action="purchase_form_action_new" id="menu_purchase_form_action_new" parent="purchase.menu_purchase_root"/>


        <record id="purchase_order_tree" model="ir.ui.view">
            <field name="name">purchase.order.tree</field>
            <field name="model">purchase.order</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
                <tree string="Purchase Order">
                    <field name="name"/>
                    <field name="date_order"/>
                    <field name="minimum_planned_date"/>
                    <field name="partner_id"/>
                    <field name="location_id"/>
                    <field name="invoiced_rate" widget="progressbar"/>
                    <field name="shipped_rate" widget="progressbar"/>
                    <field name="amount_untaxed"/>
                    <field name="origin"/>
                    <field name="state"/>
                </tree>
            </field>
        </record>

        <record id="purchase_order_line_form" model="ir.ui.view">
            <field name="name">purchase.order.line.form</field>
            <field name="model">purchase.order.line</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Purchase Order Line">
                    <notebook>
                        <page string="Order Line">
                            <field name="product_qty"/>
                            <field name="product_uom" on_change="product_uom_change(parent.pricelist_id,product_id,product_qty,product_uom,parent.partner_id, parent.date_order)"/>
                            <field colspan="4" context="partner_id=parent.partner_id,quantity=product_qty,pricelist=parent.pricelist_id,uom=product_uom,warehouse=parent.warehouse_id" name="product_id" on_change="product_id_change(parent.pricelist_id,product_id,product_qty,product_uom,parent.partner_id, parent.date_order)"/>
                            <field colspan="4" name="name"/>
                            <field name="date_planned"/>
                            <field name="price_unit"/>
                            <field name="account_analytic_id"/>
                            <field name="price_subtotal" readonly="1"/>
                            <field colspan="4" name="taxes_id" domain="[('parent_id','=',False)]"/>
                        </page>
                        <page string="Notes">
                            <field colspan="4" name="notes" nolabel="1"/>
                        </page>
                    </notebook>
                </form>
            </field>
        </record>

        <record id="purchase_order_line_tree" model="ir.ui.view">
            <field name="name">purchase.order.line.tree</field>
            <field name="model">purchase.order.line</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
                <tree colors="red:date_planned&lt;=current_date" string="Purchase Order Line">
                    <field name="date_planned"/>
                    <field name="name"/>
                    <field name="product_id"/>
                    <field name="product_qty"/>
                    <field name="product_uom"/>
                    <field name="price_unit"/>
                    <field name="price_subtotal"/>
                </tree>
            </field>
        </record>

        <act_window context="{'partner_id': active_id}" domain="[('partner_id', '=', active_id)]" id="act_res_partner_2_purchase_order" name="Purchase orders" res_model="purchase.order" src_model="res.partner"/>
    </data>
</terp>