[Mono-list] DrawingArea needs to redraw signal??

[Michael Hutchinson]

On Tue, Nov 16, 2010 at 6:09 AM, Francisco M. Marzoa <fmmarzoa at gmx.net> wrote:
> Hello,
>
> Currently I'm handling the ExposeEvent -as Miguel de Icaza told me in a
> prior answer- but I ignored that there're another way to do the same. I
> assume that overriding OnExpose is not available through Monodevelop
> interface designer, isn't it? So I should do something like:
>
> drawingarea1.OnExpose += MyOnExposeMethodDelegate

You may also wish to use [ConnectBefore] on your event handler, and
set RetVal to true, so that the default handler doesn't get called.
All the GTK built-in behaviors are implemented as event handlers, but
GTK offers a way to stop events from propagating to other handlers
(set RetVal to true), so built-in handlers often "swallow" events. You
can use ConnectBeforeAttribute to insert handlers before the
built-ins.

Note also that you should use the Drawable object from the expose
event's Window property, not the widget's GdkWindow property. This is
a temporary double-buffered surface.


-- 
Michael Hutchinson
http://mjhutchinson.com