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.
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.