Re: GtkNotebook problems

[Owen Taylor <otaylor redhat com>]

Damon Chaplin <damon@karuna.freeserve.co.uk> writes:

> Owen Taylor wrote:
> > 
> > Damon Chaplin <damon@karuna.freeserve.co.uk> writes:
> > 
> > > I think there are a couple of problems with GtkNotebook (GTK+ 1.2.6):
> > >
> > >  1) gtk_notebook_real_switch_page() currently queues a resize, but
> > >     for complicated layouts this can make page switching quite slow,
> > 
> > Really? Resizing is almost always pretty instantaneous.
> 
> I'm rewriting the Day view of gnome-cal, using a GnomeCanvas. After a bit
> more investigation it seems that the problem is that the Year view adds an
> idle function during size_allocate which takes quite a bit of time, so when
> the notebook switches to my view it gets repainted slowly (about 0.5 sec delay).
> 
> So doing a resize can be slow, though I'm not sure why the Year view is that
> slow. Maybe just too many canvas items (something like 540).

Perhaps the year view just needs a tweak to avoid recomputing the layout
when the size doesn't actually change (that is, the stuff done
in year-view.c:idle_handler). The canvas's ::size_allocate routine doesn't
look like it really takes any time.

Regards,
                                        Owen