GtkWidget::map
This method maps a widget to the screen area it will take. It is
mostly used internally, being one of the methods that is called as
part of the show() routine.
It causes the "map" signal to
be emitted by the widget, which in turn switches a flag causing the
widget to be mapped.
At the point of a widget's becoming mapped, the
GdkEvent GDK_MAP is
triggered, causing the
"map-event" signal to also
be emitted by that widget. Use this signal to trigger functions
that rely on the map event having occurred.
See also: show() ,
realize() .