[pygtk] Animation

[Steve McClure]

On Wed, 2006-10-11 at 09:23 -0500, Maximo Pech wrote:
> Hello, i'm new to pygtk and i'm trying to make a small animation using
> gtk.Image but i can't. This is my code:
> 
> def animar(widget, lo_que_se_muestra):
>         lo_que_se_muestra.set_from_pixbuf(frame1.get_pixbuf())
>         lo_que_se_muestra.queue_draw()
>         time.sleep(1)

You want to make sure all the queued events are processed here before
sleeping.  You can insert something like this:

          while gtk.events_pending():
              gtk.mainiteration(False)

before your sleep.

However, I think the best way to do this is to use a timer to flip
through the frames, that way you know you get back to processing the
event queue.  Lookup gobject.timeout_add() and its friends.
http://pygtk.org/pygtk2tutorial/ch-TimeoutsIOAndIdleFunctions.html#sec-Timeouts

>         lo_que_se_muestra.set_from_pixbuf(frame2.get_pixbuf())
> 
> frame1 = gtk.Image()
> frame2 = gtk.Image()
> 
> frame1.set_from_file('/mnt/usb1/avatar1.png')
> frame2.set_from_file('/mnt/usb1/avatar2.png')
> 
> lo_que_se_muestra = gtk.Image()
> bplay = gtk.Button('play')
> bplay.connect('clicked', animar, lo_que_se_muestra)
> 
> 
> The idea is to click the 'play' button, show the first frame, wait 1
> second and show the second frame, but what it is doing is wait 1
> second without showing nothing and then it shows only the last frame.
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-- 
Steve McClure                                     Racemi
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