Re: expose vs draw

[ax487 <ax487 gmx de>]

Well, assume that drawing the widget requires a large amount of work per
pixel. If I knew the region that I need to repaint then I could save
myself a lot of time. If the context is clipped this would not help much
if I don't know the relevant region, would it?

On 16.07.2014 18:36, Jasper St. Pierre wrote:
> The cairo context you get is already clipped to the exposed region. You
> don't need to do any extra work.
>
>
> On Wed, Jul 16, 2014 at 12:33 PM, ax487 <ax487 gmx de> wrote:
>
> > Hello all,
> >
> > I am currently porting an application from gtk2 to gtk3. I just noticed
> > that the "expose_event" is no longer supported, instead there is a
> > "draw" signal. I was just wondering, the "expose_event" always came with
> > a GdkEventExpose* attached which did in particular contain the rectangle
> > which was invalidated. Is it possible to obtain the invalidated
> > rectangle inside the "draw" handler or is it necessary to repaint the
> > entire widget? (I could not find a suitable function in the gtk3/gdk3
> > documentation so far)
> >
> > ax487
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