[PyQt] Detect Application Running

[Tim Golden]

On 10/01/2010 03:49, AON LAZIO wrote:
> Hi,
>       How can we find out that there is already a PyQt application running on
> Windows so when I try to open that same application, it won't open another
> one?
>       It's like I already have Firefox running and when I open firefox again,
> it won't open firefox again.
>       Thanks

Qt aside, the canonical way to do this on Windows is by
using a mutex. Have a look at this recipe:

   http://code.activestate.com/recipes/474070/

Now Qt has its own mutex object:

   http://doc.trolltech.com/4.6/qmutex.html

but it doesn't look as though it works cross-process, and I haven't
looked at the underlying code to see if it wraps the Windows Mutex
object or not. Probably some variation on the recipe above is your
best bet.

TJG