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Mag Gam


7/21/2013 7:29:27 AM

See pull request 2233:
https://github.com/matplotlib/matplotlib/pull/2233

This pull request adds a .stop() method to timers in the MacOSX backend.

Best,
-Michiel.



________________________________
 From: Michiel de Hoon <mjl...@ya...>
To: Brendan Barnwell <bre...@br...>; "mat...@li..." <mat...@li...> 
Sent: Friday, July 19, 2013 10:44 AM
Subject: Re: [Matplotlib-users] timer objects in macosx backend
 


Hi Brendan, Justin,
Thanks for your reply. I agree then that a .stop() method is needed. This is not very difficult; I'll try and implement it over the weekend.
Best,
-Michiel.




________________________________
 From: Brendan Barnwell <bre...@br...>
To: mat...@li... 
Sent: Friday, July 19, 2013 3:54 AM
Subject: Re: [Matplotlib-users] timer objects in macosx backend
 

On 2013-07-18 06:56, Justin Lazear wrote:> Hi Michiel,
>
> On my system, deleting the timer has no effect and the timer continues
> to send events. The __del__ method seems to call the same unimplemented
> _timer_stop method. Regardless, something else has a reference to the
> timer (MPL event loop maybe?) and __del__ is not being called once the
> timer has been started. It's not clear to me what should be 
stopping the
> timer in that case.
>
> Does del t stop the timer on your system? If so, could we hunt down 
what
> is happening after you delete the name t that is causing the timer 
to stop?
>
> I would personally prefer an explicit .stop() method, since I would
> prefer not to rely on the garbage collector's behavior being consistent
> (hard to make sure nothing else is holding a reference to timer) when
> there is a very
 well-defined function that does what I want.

    Relying on "del t" can't be the right solution, since like you note, 
it only deletes the name, not the object.  If you create multiple 
references to a timer and only del some of them, e.g.:

t = fig.canvas.new_timer()
x = t
del t

Then the object's __del__ will definitely not be called yet.  It makes 
sense to have a way to stop the timer directly, regardless of how many 
names are pointing to it.

-- 
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is 
no path, and leave a trail."
    --author unknown

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