In GTK+ 1.2, this function would immediately render the
region area of a widget, by invoking the virtual draw method of a
widget. In GTK+ 2.0, this method simply invalidates the specified region of the
widget, then updates the invalid region of the widget immediately.
Usually you don't want to update the region immediately for
performance reasons, so in general Widget.QueueDrawArea is
a better choice if you want to draw a region of a widget.
Requirements
Namespace: Gtk Assembly: gtk-sharp (in gtk-sharp.dll) Since: Gtk# 2.4