Invalidates the area of widget defined by region by calling
gdk_window_invalidate_region() on the widget's window and all its
child windows. Once the main loop becomes idle (after the current
batch of events has been processed, roughly), the window will
receive expose events for the union of all regions that have been
invalidated.
Normally you would only use this function in widget
implementations. You might also use it to schedule a redraw of a
GtkDrawingArea or some portion thereof.
Invalidates the area of widget defined by region by calling gdk_window_invalidate_region() on the widget's window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated. Normally you would only use this function in widget implementations. You might also use it to schedule a redraw of a GtkDrawingArea or some portion thereof.