Sets up the receiver to display a menu.
- macOS 10.0+
The cell's rectangle, specified in points in the coordinate system of the view in the
controlparameter. The menu is attached to this rectangle.
The view in which to display the pop-up button's menu.
This call sets up the popup button cell to display a menu, which occurs in
perform. This method sets the cell's control view and then highlights and redraws the cell. It does not show the menu.
You normally do not call this method explicitly. It is called by the Application Kit automatically when the menu for the pop-up button is to be displayed.