Convenience function that calls gtk_widget_queue_draw_region() on
the region created from the given coordinates.
The region here is specified in widget coordinates.
Widget coordinates are a bit odd; for historical reasons, they are
defined as @widget->window coordinates for widgets that return %TRUE for
gtk_widget_get_has_window(), and are relative to @widget->allocation.x,
@widget->allocation.y otherwise.
@width or @height may be 0, in this case this function does
nothing. Negative values for @width and @height are not allowed.
Convenience function that calls gtk_widget_queue_draw_region() on the region created from the given coordinates.
The region here is specified in widget coordinates. Widget coordinates are a bit odd; for historical reasons, they are defined as @widget->window coordinates for widgets that return %TRUE for gtk_widget_get_has_window(), and are relative to @widget->allocation.x, @widget->allocation.y otherwise.
@width or @height may be 0, in this case this function does nothing. Negative values for @width and @height are not allowed.