Window actions give instructions to the client-side user interface. When a user clicks on a menu item or a button to open a form, it's the underlying action that instructs the user interface what to do.
We will start by creating the window action to be used on the menu items, to open the to-do tasks and stages views. Create the todo_view.xml data file with the following code:
<?xml version="1.0"?>
<openerp>
<data>
<act_window id="action_todo_stage" name="To-Do Task Stages" res_model="todo.task.stage" view_mode="tree,form" />
<act_window id="todo_app.action_todo_task" name=" To-Do Tasks" res_model="todo.task" view_mode="tree,form,calendar,gantt,graph" target="current " context="{'default_user_id': uid}"
domain="[]"
limit="80" />
<act_window id="action_todo_task_stage" name="To-Do Task Stages" res_model="todo.task.stage" src_model="todo.task"
multi="False"/> </data>
</openerp>Window actions...