Re: [Visualpython-users] Re: VPython / python-gtk integration

[Gary P. <pa...@in...>]

I'm interested in what you are trying to do.

Could you please post a minimal complete vpython/gtk script ... maybe one
that just places a sphere at the origin.

Thanks,
gary

----- Original Message ----- 
From: "James Philip Roper" <u32...@an...>
To: <vis...@li...>
Sent: Monday, April 26, 2004 10:05 PM
Subject: [Visualpython-users] Re: VPython / python-gtk integration


> I have successfully run a simulation in VPython that had a pygtk
> interface using threads.  The main thread thread ran the GTK main loop,
> then I had a thread for the simulation.  I had issues quitting the
> program (though I often also have the same issues when I'm not using
> threading or pygtk), and there also seemed to be various quirks when I
> tried running it on other platforms.  This is the basic idea:
>
> import threading
>
> class simulator(threading.Thread):
>     def __init__(self):
>        threading.Thread.__init__(self)
>        self.runningEvent = threading.Event()
>     def run(self):
>        while 1:
>           self.runningEvent.wait()
>           # simulation stuff
>
> def startStopCallback(widget, data):
>     if s.runningEvent.isSet():
>        s.runningEvent.clear()
>     else:
>        s.runningEvent.set()
>
> gtk.threads_init()
> # gtk setup stuff including a start/stop button
>
> s = simulator()
> s.start()
>
>
> The gtk.threads_init() must be called if you are using pygtk and
threading.
>
> One thing that you need to ensure, if you are ever making GTK calls from
> a thread other than the thread GTK is running in, you must use
> gtk.threads_enter() and gtk.threads_leave() before and after you make
> the call.