try this

<act_window id="launch_bankbook_wizard"
            name="Name of View"
            res_model="model.name"
            view_mode="tree"
            target="new"
            key2="client_action_multi"/>
Or

res = {  
    'type': 'ir.actions.act_window',
    'name': ('Dummy'),
    'res_model': 'sale.order.line',
    'view_type': 'form',
    'view_mode': 'tree,form',
    'view_id': False,
    'target': 'new',
    'views': [(tree_id, 'tree'), (form_id, 'form')],
    'context': {
        'default_product_ids': [self.id]
    }
}

Or

 

In your XML you have to add some thing like this:

<button name="open_sale_order_lines" string="Open Form" type="object">

And in your python:

def open_sale_order_lines(self,cr,uid,ids,context=None):

if context is None:

context = {}

sale_ids = self.pool.get('sale.order').search(cr,uid,[('project_id','=',context.get('search_default_project_id',False)),('partner_id','in',context.get('search_default_partner_id',False))])

names = [record.name for record in self.browse(cr, uid, ids, context=context)]

name = _('Sales Order Lines of %s') % ','.join(names)

return {

'type': 'ir.actions.act_window',

'name': name,

'view_type': 'form',

'view_mode': 'tree,form',

'context': context,

'domain' : [('order_id','in',sale_ids)],

'res_model': 'sale.order.line',

'nodestroy': True,

}

Try to learn from those useful links:

http://codeimplementer.blogspot.com/2013/10/create-active-window-popup-in-openerp.html

https://answers.launchpad.net/openobject-server/+question/178972