Function to use to decide if to recurse to a child. null means never recurse.
Adds region to the update area for
the window. The update area is the region that needs
to be redrawn, or "dirty region." The call Window.ProcessUpdates sends one or
more expose events to the window, which together cover
the entire update area. An application would normally
redraw the contents of the whole window in response to
those expose events.
GDK will call Window.ProcessAllUpdates on your
behalf whenever your program returns to the main loop
and becomes idle, so normally there's no need to do
that manually, you just need to invalidate regions
that you know should be redrawn.
The child_func parameter controls
whether the region of each child window that
intersects region will also be
invalidated. Only children for which child_func returns true
will have the area invalidated.
Namespace: Gdk Assembly: gdk-sharp (in gdk-sharp.dll)