On 30/04/2012 1:07 AM, reckoner wrote:
Thanks for your reply.
Yes, the app works fine if I don't PumpMessages in my own code. There is
no console that the application fires up when it runs the embedded
Python code. In this situation, how do I (or, can I?) pump for my own
messages if the application is doing some other kind of event loop, as
you describe?
The event loop isn't generally where you handle messages - messages are
generally handled in a WndProc or similar (ie, by using something like
win32gui and its message handling support). You might also want to look
into hooking messages (pythonwin has some support for that, and another
package called PyHook might also help).
Mark
Thanks!
On Saturday, April 28, 2012 10:15:50 PM, Mark Hammond wrote:
I don't know why it crashes exactly, but if the other app has its own
event loop then things are going to get screwey - PumpMessages never
returns (well, not until a WM_QUIT message is received), so their event
loop will never run.
I'd guess that their event loop and event handlers have some assumptions
built in to it - eg, they might be assuming that their event loop as set
something up that one of the message handlers relies on. You running
your own event loop will prevent that setup from happening so one of
their handlers will crash.
Does that app work OK if you don't call PumpMessages? If so, a work
around might be to check if you have a console, and if you don't, assume
some other event loop must be running.
Mark
On 29/04/2012 2:21 AM, reckoner wrote:
I have written some code that catches windows events that also includes
the usual PumpMessages, and all of this works fine when I run it from
the Python interpreter (Python version 2.6). However, when a separate
application that has Python embedded calls the same code, the calling
application crashes. I have tracked this down to the PumpMessages call
in my code.
My question is why does this work perfectly well from the interpreter,
but cause a crash when called from the embedded Python running in a
separate application. Note that I don't have access to the separate
application in which the Python call is embedded and when it crashes it
does not provide any kind of traceback. It took a long time to narrow
it down to the PumpMessages call.
Any advice appreciated. I am really stuck here. By the way, this is on
Windows XP 32-bit.
Thanks!
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