[maemo-developers] HildonAnimationActor and transparency

[From: Cornelius Hald]

Vlad, you are great :)

Your solution works like a charm. Thank you very much!!!

I think you could also have a solution for my second problem, but I'll
create a new thread for that.

Thanks again!
Conny


On Fri, 2009-10-23 at 10:40 +0300, Vlad Vasiliev wrote:
> I'm sorry I forgot a small additional part of code.
> 
> Here is the correct variant
> 
> pixbuf = gdk_pixbuf_new_from_file_at_size 
> ("/usr/share/omweather/icons/Glance/dark_cloud.png",
>            128, 128,  NULL);
> 
> image = gtk_image_new_from_pixbuf (pixbuf);
> g_object_unref(G_OBJECT(pixbuf));
> g_signal_connect(G_OBJECT(image), "expose_event",
>                                               G_CALLBACK(expose_event), pixbuf)
> ha = hildon_animation_actor_new();
> gtk_container_add (GTK_CONTAINER (ha), image);
> realize(ha);
> gtk_widget_show_all (ha)
> 
> 
> realize (GtkWidget *widget)
> {
>     GdkScreen *screen;
>     screen = gtk_widget_get_screen (widget);
>     gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap (screen));
> }
> 
> gboolean
> expose_event (GtkWidget *widget,GdkEventExpose *event,
>       gpointer data)
> {
>     cairo_t *cr;
>     GdkPixbuf *pixbuf = (GdkPixbuf *) data;
> 
>     cr = gdk_cairo_create(widget->window);
>     gdk_cairo_region(cr, event->region);
>     cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
>     gdk_cairo_set_source_pixbuf(cr, pixbuf, 0.0, 0.0);
>     cairo_paint(cr);
>     cairo_destroy(cr);
>     return TRUE;
> }
> 
> 
> 
> Vlad Vasiliev wrote:
> > Hi Cornelius
> >
> > I used the next solution:
> >
> > pixbuf = gdk_pixbuf_new_from_file_at_size 
> > ("/usr/share/omweather/icons/Glance/dark_cloud.png",
> >            128, 128,  NULL);
> >
> > image = gtk_image_new_from_pixbuf (pixbuf);
> > g_object_unref(G_OBJECT(pixbuf));
> > g_signal_connect(G_OBJECT(image), "expose_event",
> >                                               G_CALLBACK(expose_event), 
> > pixbuf)
> > ha = hildon_animation_actor_new();
> > gtk_container_add (GTK_CONTAINER (ha), image);
> >
> >
> > gboolean
> > expose_event (GtkWidget *widget,GdkEventExpose *event,
> >       gpointer data)
> > {
> >     cairo_t *cr;
> >     GdkPixbuf *pixbuf = (GdkPixbuf *) data;
> >
> >     cr = gdk_cairo_create(widget->window);
> >     gdk_cairo_region(cr, event->region);
> >     cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
> >     gdk_cairo_set_source_pixbuf(cr, pixbuf, 0.0, 0.0);
> >     cairo_paint(cr);
> >     cairo_destroy(cr);
> >     return TRUE;
> > }
> >
> > BR,
> > Vlad.
> > Cornelius Hald wrote:
> >   
> >> Hi,
> >>
> >> yesterday I was playing around with HildonAnimationActor and it's really
> >> nice what you can do with it. But there are still some things, I don't
> >> really understand. Hopefully someone can help me with that :)
> >>
> >> I created a HildonAnimationActor and put a GtkImage, made from a ARGB
> >> png, onto it with gtk_container_add().
> >>
> >> The problem is, that the HildonAnimationActor has it's own background,
> >> so the transparent parts of the image show the background of the actor
> >> instead of the underlaying widget.
> >>
> >> I can use hildon_animation_actor_set_opacity() an the actor to make it
> >> transparent, but that affects the complete actor, so both, the actors
> >> background and the image become transparent.
> >>
> >> My question is: How do I make the background of the actor completely
> >> transparent without altering the transparency of the content of the
> >> actor?
> >>
> >> I really hope I don't have to go back to HildonRemoteTexture, because
> >> HildonAnimationActor is much nicer for my purpose.
> >>
> >> Thanks!
> >> Conny
> >>
> >>
> >> P.S. HildonAnimationActor is a GtkWindow, so maybe I should just try to
> >> remove the background of the window? I don't know how to do that, but I
> >> know it's possible. Would this be the way to go or is there a simpler
> >> way?
> >>
> >>
> >> _______________________________________________
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> >> maemo-developers at maemo.org
> >> https://lists.maemo.org/mailman/listinfo/maemo-developers
> >>   
> >>     
> >
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> 
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