Re: the right way to draw in a drawingarea

[Paul Davis <pjdavis engineering uiowa edu>]

Paul Davis wrote:

> Paul Davis wrote:
>
> > On Wed, 2005-10-12 at 00:17 -0500, the other Paul Davis wrote:
> >  
> >
> > > The complexities abound.  Insert apropriate quote here.  I can't 
> > > explain the gtk drawing system because I don't entirely understand 
> > > it.  I'm glad hings are working.
> > >   
> >
> >
> > there is really nothing mysterious is you remember one simple rule:
> >
> >     draw on your widget's window ONLY in an expose event handler.
> >
> > the point of queue_draw() is to request that the GTK event loop
> > schedules an "artificial" expose event at an appropriate time.
> > otherwise, you don't have an expose event available to make whatever
> > change it is that you want to make. drawing on widgets' windows from
> > anywhere else is wrong, and will lead to unpredictable results.
> >
> > --p (the other other Paul Davis)
> >
> >
> >
> >  
> Wow.  I was getting really confused for a second wondering how it is 
> that I'm writing emails I don't remember.
>
> Anyway, I agree exactly with what Other Paul is saying.  I just don't 
> know why it's so.  Other than its the way things were intended.
>
> I'll take a look at adding to an example.
>
> Paul