[10264] in The GTK GIMP ToolKit mailing list archive
[gtk-list] Re: gtk_widget_queue_draw
daemon@ATHENA.MIT.EDU (Adrian Feiguin)
Thu Nov 19 12:20:58 1998
Date: Wed, 18 Nov 1998 22:52:22 +0300 (GMT-3)
From: Adrian Feiguin <adrian@ifir.ifir.edu.ar>
To: gtk-list@redhat.com
cc: otaylor@redhat.com, timj@gtk.org
In-Reply-To: <Pine.LNX.3.96.981118061149.15890L-100000@ifir.ifir.edu.ar>
Resent-From: gtk-list@redhat.com
Reply-To: gtk-list@redhat.com
On Wed, 18 Nov 1998, Adrian Feiguin wrote:
>
>
> On 18 Nov 1998, Owen Taylor wrote:
>
> >
> > Adrian Feiguin <adrian@ifir.ifir.edu.ar> writes:
> >
> > > I'm working on a widget and I defined the function widget_class->draw.
> > > In previos versions of gtk (e.g. 0.99.3) my widget ran without
> > > problems, but in gtk+-1.0.* the widget is redrawn calling this function
> > > aparentrly at random, without any logic. I can't understand this behavior
> > > and I dont know whether is a bug in gtk or I'm missing something.
> >
> > There were some changes early last year in the order things
> > where drawn and size-allocated.
> >
> > I'm pretty certain that the 1.0.x code doesn't call
> > ->draw "at random". If you have some particular example of
> > behavior you want explained, you might want to detail
> > exactly what you see happening.
> >
> > (The redraw logic has also been changed a fair bit in 1.1.x,
> > but most things that work in 1.0.x should work in 1.1.x
> > as well)
> >
> > Regards,
> > Owen
> >
> I'm a little "out of date", I haven't followed the changelogs. I'm sorry.
> Well, in the gtk+-1.0.0 ChangeLog file I found the following:
>
> * gtk/gtkwidget.c (gtk_widget_draw): When gtk_widget_draw ()
> occurs with queued draw already in place, redraw _entire_
> widget. (Pointed out by Tim Janik)
>
> I think this explains my problems. But I can't understand how it
> exactly works. What does it mean "queued draw already in place"?
> Thanks,
> <ADRIAN>
>
I'm sorry, I'm going to be more precise. As you probably know, the widget
I'm refering is gtksheet. It is a composite widget: it has its
window,scrollbars, and an entry. When I move the entry from one cell to
the other, what I do is the following:
gtk_widget_size_allocate(sheet->sheet_entry, &entry_allocation);
gtk_widget_queue_draw(sheet->sheet_entry);
gdk_window_show(sheet->sheet_entry->window);
gtk_widget_grab_focus(sheet->sheet_entry);
What happens is that SOMETIMES, the compete widget is entirelly redrawn,
and we don't want this. What I mean with "random" is that I can't
understand the logic behind this, bacause it happens sometimes, not
always, and I can't find any correlation between the events.
I write to you because you made the major part of the changes in
gtkwidget.c and maybe you can give me any hint.
Thanks, and regards,
<ADRIAN>
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