Function
Gtk.MenuButtonCreatePopupFunc
Description [src]
User-provided callback function to create a popup for a
GtkMenuButton on demand.
This function is called when the popup of menu_button is shown,
but none has been provided via gtk_menu_button_set_popover()
or gtk_menu_button_set_menu_model().
Parameters
| menu_button | GtkMenuButton | 
| the  | |
| Ownership is not transferred to the callee | |
| user_data | gpointer | 
| User data passed to  |