[PyKDE] Keeping the GUI from freezing

[Tony Cappellini]

Is it not sufficient to create a timer, and have it call the main
window update function?
Do I really need to use threads?

On 2/13/07, Dave Fancella <dave at davefancella.com> wrote:
> On Tuesday 13 February 2007 3:08 pm, Tony Cappellini wrote:
> > > If your thread inherits QObject somehow, you can just do:
> >
> > So currently, I'm not using threads or popen. I'm using the ugly hack
> > which does an exec, which was recently posted- as a work around not
> > being able to catch the output of the logger.
>
> Oh, ok.
>
> > > self.emit(QtCore.SIGNAL("nameYourSignal()") )
> >
> > With your reply in mind- If I need to use threads, I will probably use
> > Qt threads.
> > However, I don't know what signal to use in your example.
> > Are you suggesting I create an arbitrary signal- not assoicated with
> > any particular widget?
>
> Yes, you define the signal and create it thataway.  You can give it arguments
> too so you can pass real data.  So to use it, you need somewhere else to
> connect to it like you connect to any other signal.  Also, you probably need
> to look up the exact arguments to QObject::emit, something looks wrong about
> the line I posted and I'm not placing exactly what.
>
> Dave
>
>
> > > You can give arguments to it also.  Then just connect slots up to the
> > > signal. If your thread doesn't for some reason, then you need to give it
> > > a QObject of some sort that it can call.
> > >
> > > Anyway, in #qt they tell me signals and slots are thread safe.  I haven't
> > > tested it yet, but will be testing it soon.  :)
> > >
> > > Dave
> > >
> > > > Paul Giannaros ceruleanblaze at gmail.com
> > > > Tue Feb 13 19:19:46 MET 2007
> > > >
> > > > > Does anyone have a Python example of how to use a Thread to keep a
> > > > > gui from becoming unresponsive?
> > > >
> > > > Well, before you turn to threads I'd suggest that there are far simpler
> > > > ways to go about what you want to do. There are may ways to start a
> > > > process asynchronously so that the GUI remains responsive as usual. You
> > > > can use the os.popen function, for example; or the subprocess module;
> > > > or Qt's QProcess.
> > > >
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>