The ::no-expose-event will be emitted when the widget's window is
drawn as a copy of another GdkDrawable (with gdk_draw_drawable() or
gdk_window_copy_area()) which was completely unobscured. If the source
window was partially obscured GdkEventExpose events will be generated
for those areas.
The ::no-expose-event will be emitted when the widget's window is drawn as a copy of another GdkDrawable (with gdk_draw_drawable() or gdk_window_copy_area()) which was completely unobscured. If the source window was partially obscured GdkEventExpose events will be generated for those areas.