On Feb 7, 2008 2:21 AM, Kashyap Ashwin <[EMAIL PROTECTED]> wrote:
> So for example, this one seems to work for me:
> ...
Thanks Ashwin!
Unfortunately it's not just the gst related objects that leak but e.g.
effects seem to cause some reference cycles too.
I of course agree with Emmanuele that Player object should be re-used.
I used that as an example since the memory leak was so dramatic. I
have implemented some simple widgets (sometimes animated with effects)
based on clutter.Group. Re-using widget instances would complicate
the application logic a lot. Consider that user can navigate back and
forth the UI. It is not convenient to keep a pool of e.g. button
widgets that can be re-initialized and re-used later when the user
navigates back to the screen with the button.
Here's an another example. It has Screen class based on clutter.Group
that contains just a label. When pressing a key the old Screen is
faded out, removed from the stage and finally new Screen enters the
stage. Old Screens never seem to get garbage collected.
--
Tero
import clutter
import gc
current_screen = None
counter = 1
fade_effect_tmpl =
clutter.EffectTemplate(clutter.Timeline(duration=300),
clutter.ramp_inc_func)
class Screen(clutter.Group):
def __init__(self, title_text):
super(Screen, self).__init__()
print 'INIT %s' % self
title = clutter.Label()
title.set_text(title_text)
title.set_font_name('Arial 150px')
title.set_color(clutter.Color(0,0,0))
title.show()
self.add(title)
def __del__(self):
print 'DEL %s' % self
def on_key_press_event(a,b):
t = clutter.effect_fade(fade_effect_tmpl,
current_screen,
0,
on_fade_out_completed,
0)
t.start()
return True
def on_fade_out_completed(a,b):
global current_screen
global counter
stage.remove(current_screen)
# hopeless tries to get rid of 'current_screen' group
del current_screen
current_screen = None
gc.collect()
current_screen = Screen(str(counter))
current_screen.set_position(120,30)
stage.add(current_screen)
current_screen.show()
counter += 1
return True
stage = clutter.stage_get_default()
stage.set_size(320,240)
stage.connect('key-press-event', on_key_press_event)
current_screen = Screen(str(counter))
current_screen.set_position(120,30)
stage.add(current_screen)
counter += 1
stage.show_all()
clutter.main()
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