Removes @controller from @widget, so that it doesn't process events anymore.
It should not be used again.
Widgets will remove all event controllers automatically when they are destroyed, there is normally no need to call this function.
a #GtkEventController
See Implementation
Removes @controller from @widget, so that it doesn't process events anymore.
It should not be used again.
Widgets will remove all event controllers automatically when they are destroyed, there is normally no need to call this function.