[PySide] a couple of QProgressDialog questions

[Frank Rueter | OHUfx]

Hi everybody,

after almost a year of having to neglect PySide I'm finally making some 
time for it again, only to feel like I almost forgot everything I 
learned :-D

I'm trying to do something fairly common and wanted to sanity check my 
approach, so here is my sandbox script to figure out how to use 
QProgressDialog:
http://pastebin.com/4kVhPiUx

It all works as expected except for the fact that when I hit cancel, the 
progress stops (as expected), and the second time I hit the cancel 
button the dialog closes. Seems wrong, and I'm sure I should be doing it 
better, so that the progress stops and the dialog closes at the same 
time. This behaviour seems to be the same even if setAutoClose() is set 
to True.
Should manually close the window when wasCanceled() is true, or set the 
progress' value to it's maximum to let auroClose take over? Or is there 
a better way?

My second question is:
What is the best approach to connect a QProgressDialog to another thread 
that is running a command line application?
I'm guessing I should write a wrapper around the external application 
(using QEvent or QProcess?), grabbing it's stdout, parsing it to get the 
actual progress value, then connecting that to the QProgressDialog widget.
Is that the way to do it?

Ultimately I would like a simple Dialog, that has both a progress bar 
and a text widget, to show the application's stdout as well as the 
overall progress.

Am I on the right track or are there easier/better ways?

Cheers,
frank