set_create_popup_func

Sets func to be called when a popup is about to be shown.

func should use one of

• [method@Gtk.MenuButton.set_popover]
• [method@Gtk.MenuButton.set_menu_model]

to set a popup for this. If func is non-null, this will always be sensitive.

Using this function will not reset the menu widget attached to this. Instead, this can be done manually in func.

Parameters:

this	a `GtkMenuButton`
func	function to call when a popup is about to be shown, but none has been provided via other means, or null to reset to default behavior.
destroy_notify	destroy notify for user_data
user_data	user data to pass to func.