The ::unmap-event signal will be emitted when the
widget‘s window is
unmapped. A window is unmapped when it becomes invisible on the screen.
To receive this signal, the
GdkWindow associated to the widget needs
to enable the #GDK_STRUCTURE_MASK mask. GDK will enable this mask
automatically for all new windows.
|Default handler:|| |
The default handler is called after the handlers added via