[maemo-developers] HildonAnimationActor and transparency

[From: Vlad Vasiliev]

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?
>>
>>
>> _______________________________________________
>> maemo-developers mailing list
>> maemo-developers at maemo.org
>> https://lists.maemo.org/mailman/listinfo/maemo-developers
>>   
>>     
>
> _______________________________________________
> maemo-developers mailing list
> maemo-developers at maemo.org
> https://lists.maemo.org/mailman/listinfo/maemo-developers
>