[ Version ( deprecated = true , deprecated_since = "3.12" ) ]
public virtual signal bool visibility_notify_event (EventVisibility event)
Warning: visibility_notify_event is deprecated since 3.12.
The visibility_notify_event will be emitted when the widget's window is obscured or unobscured.
Modern composited windowing systems with pervasive transparency make it impossible to track the visibility of a window reliably, so this signal can not be guaranteed to provide useful information.
To receive this signal the Window associated to the widget needs to enable the VISIBILITY_NOTIFY_MASK mask.
| event |
the EventVisibility which triggered this signal. |
|
true to stop other handlers from being invoked for the event. false to propagate the event further. |