GTK+ Forums

ramesh · GTK+ Guru Joined: 16 Nov 2006 Posts: 201 Location: INDIA

hi all
i would like to put an animation image in the gtk window.
is it possible.
can you give me an example program for this.

dreblen · Posted: Thu Aug 21, 2008 4:22 pm Post subject:

you can use gtk_image_new_from_file on a .gif and it will load the animation and loop it forever.
you can also use GdkPixbufAnimation
http://library.gnome.org/devel/gdk-pixbuf/stable/gdk-pixbuf-animation.html
which gives a bit more control.
the only advantage that I can really think of for using GdkPixbufAnimation is that you can stop the animation once a condition is met,
in my example I stop the animation after 30 frames

Code: (C)

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#include <gtk/gtk.h>

typedef struct _Iter_Image
{
GtkWidget *im;
GdkPixbufAnimationIter *iter;
} Iter_Image;

gboolean advance_frame(Iter_Image *ii)
{
static gint frame = 1;

if(gdk_pixbuf_animation_iter_advance(ii->iter, NULL))
{
frame++;
gtk_image_set_from_pixbuf(GTK_IMAGE(ii->im), gdk_pixbuf_animation_iter_get_pixbuf(ii->iter));
}

if(frame == 30)
return FALSE;
return TRUE;
}

int main(int argc, char **argv)
{
GtkWidget *win;
GtkWidget *im;
GdkPixbufAnimation *anim;
GdkPixbufAnimationIter *iter;
GdkPixbuf *pbuf;
GError *err;
Iter_Image ii;

err = NULL;

gtk_init(&argc, &argv);

win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(G_OBJECT(win), "delete-event", G_CALLBACK(gtk_main_quit), NULL);

anim = gdk_pixbuf_animation_new_from_file("test.gif", &err);
if(err != NULL)
{
g_critical(err->message);
g_error_free(err);
return 1;
}
iter = gdk_pixbuf_animation_get_iter(anim, NULL);
pbuf = gdk_pixbuf_animation_iter_get_pixbuf(iter);
im = gtk_image_new_from_pixbuf(pbuf);
gtk_container_add(GTK_CONTAINER(win), im);
gtk_widget_show(im);
ii.im = im;
ii.iter = iter;
g_timeout_add(gdk_pixbuf_animation_iter_get_delay_time(iter), (GSourceFunc)advance_frame, (gpointer)&ii);

gtk_widget_show(win);

gtk_main();

return 0;
}

ramesh · GTK+ Guru Joined: 16 Nov 2006 Posts: 201 Location: INDIA

thank you. its working .
but the problem is the animation image animating very fast than its orginal.
(

dreblen · Posted: Fri Aug 22, 2008 3:59 am Post subject:

it might go slower if you increase your timeout interval, ex:

Code: (C)
1	g_timeout_add(gdk_pixbuf_animation_iter_get_delay_time(iter)+100, (GSourceFunc)advance_frame, (gpointer)&ii);

the interval is measured in milliseconds, so adding 100 will add a 10th of a second

ramesh · GTK+ Guru Joined: 16 Nov 2006 Posts: 201 Location: INDIA