The ::map-event signal will be emitted when the widget's window is
mapped. A window is mapped when it becomes visible 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 ::map-event signal will be emitted when the widget's window is mapped. A window is mapped when it becomes visible 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.