This method destroys information regards the dimensions of the screen area where the widget is displayed . It is mostly used internally, being one of the methods that is called as part of the hide() routine. It causes the "unmap" signal to be emitted by the widget, which in turn switches a flag causing the widget to be unmapped.

At the point of a widget's becoming unmapped, the GdkEvent GDK_UNMAP is triggered, causing the "unmap-event" signal to also be emitted by that widget. Use this signal to trigger functions that rely on the unmap event having occurred.

See also: map()