[IMP] set attr for Receive and Control Invoice button.

bzr revid: nco@tinyerp.com-20121030122654-3gyk4o6wqhvznl7l

addons/purchase/stock.py

@@ -135,6 +135,7 @@ class stock_picking_in(osv.osv):
     _columns = {
         'purchase_id': fields.many2one('purchase.order', 'Purchase Order',
             ondelete='set null', select=True),
+        'purchase_invoice_method': fields.related('purchase_id', 'invoice_method', type='selection', selection=[('manual','Based on Purchase Order lines'),('order','Based on generated draft invoice'),('picking','Based on incoming shipments')], string='Purchase Invoice Method'),
         'warehouse_id': fields.related('purchase_id', 'warehouse_id', type='many2one', relation='stock.warehouse', string='Destination Warehouse'),
     }
     def create_draft_invoice(self, cr, uid, ids, context=None):

addons/purchase/stock_view.xml

@@ -42,8 +42,11 @@
             <field name="model">stock.picking.in</field>
             <field name="inherit_id" ref="stock.view_picking_in_form"/>
             <field name="arch" type="xml">
+                <xpath expr="//field[@name='move_lines']" position="after">
+                    <field name="purchase_invoice_method" invisible="1"/>
+                </xpath>
                 <xpath expr="//button[@name='action_process']" position="after">
-                    <button name="create_draft_invoice" attrs="{'invisible':[('invoice_state', '=', 'none')]}" string="Receive &amp; Control Invoice" type="object" class="oe_highlight"/>
+                    <button name="create_draft_invoice" string="Receive &amp; Control Invoice"  attrs="{'invisible':[('purchase_invoice_method', '!=', 'picking')]}" type="object" class="oe_highlight"/>
                 </xpath>
             </field>
         </record>