Re: Animation problem

["Norbert Bauer" <dasaspock gmx de>]

Thank you very much!
Like this it's now working and seems korrekt :-)

GdkPixbufAnimationIter *animIter = gdk_pixbuf_animation_get_iter
                                   (waitImageAnimated, NULL);
while(...) {
  gtk_widget_queue_draw(GTK_WIDGET (GTK_DIALOG (waitDlg)->vbox));
  gdk_window_process_updates (gtk_widget_get_parent_window (GTK_DIALOG 
                              (waitDlg)->vbox), true);
  gdk_pixbuf_animation_iter_advance (animIter,NULL);
  waitImagePixbuf = gdk_pixbuf_animation_iter_get_pixbuf(animIter);
  gtk_image_set_from_pixbuf(GTK_IMAGE (waitImage),waitImagePixbuf);
}
g_object_unref(G_OBJECT(animIter));

dasaspock



-------- Original-Nachricht --------
Datum: Sun, 6 Aug 2006 13:05:10 +0000
Von: tomas tuxteam de
An: dasaspock gmx de
Betreff: Re: Fwd: Animation problem

> On Sun, Aug 06, 2006 at 02:33:41PM +0200, dasaspock gmx de wrote:
> > Hi, unfortunately nobody seems to have an idea so far.
>
> [...]
>
> So many things, I don't know where to start...
>
> > Hi, I have a problem with keeping an animated gif running while the gtk
> main loop is blocked.
> > The gif (called waitImage) is placed on a GtkDialog (waitDialog). The
> GdkPixbufAnimation "behind" waitImage is called waitImageAnimated.
> > I tried to do it like this:
> >
> > while(...) {
> >   gtk_widget_queue_draw(GTK_WIDGET (GTK_DIALOG (waitDlg)->vbox));
> >   gdk_window_process_updates (gtk_widget_get_parent_window (GTK_DIALOG
> >                                               (waitDlg)->vbox), true);
> >   waitImagePixbuf = gdk_pixbuf_animation_iter_get_pixbuf(
> >                   gdk_pixbuf_animation_get_iter(waitImageAnimated,
> NULL));
> >   gtk_image_set_from_pixbuf(GTK_IMAGE (waitImage),waitImagePixbuf);
>
> Here's the leak: on each round, you order an animation iterator with
> gdk_pixbuf_animation_get_iter(...) just to throw it away without
> unref()ing it.
>
> The way to avoid this leak might be:
>
>  |   GdkPixbufAnimationIter *iter =
> gdk_pixbuf_animation_get_iter(waitImageAnimated, NULL);
>  |   while(...) {
>  |     ...
>  |   
> gtk_image_set_from_pixbuf(gdk_pixbuf_animation_iter_get_pixbuf(iter));
>  |   }
>  |   g_object_unref(G_OBJECT(iter));
>
> As I understand the doc, you don't have to unref the pixbufs you get
> from the iterator (but the iterator itself!). Plus you don't have to
> dreate a new iterator on each round of your loop (I guess it would start
> at the first image of the animation each time anyway).
>
> But I don't understand why you try to do it all yourself. There is an
> gtk_image_set_from_animation() which should just work for you (plus, if
> you want to step all by yourself through the anim frames, maybe you
> should do it in a timer or idle func, instead of doing the gtk loop by
> hand and getting into hot water about that ;)
>
> HTH
> -- tomás

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