Thanks Justin. I just discovered processEvents too. :)
Something similar here. I'm writing a playblast script that, after
playblast, would send the output file to ffmpeg for compression. Haven't
tested it yet, but, generally, would Python wait for maya playblast to
complete before running the next command?
cmds.playblast( playblastCommands )
subprocess.call( ffmpeg, send output file from playblast )
Am I understanding correctly that processEvents goes in the middle?
cmds.playblast( playblastCommands )
QtGui.qApp.processEvents()
subprocess.call( ffmpeg, send output file from playblast )
Thanks
P Chong.
On Wed, Sep 26, 2012 at 9:19 PM, Justin Israel <justinisr...@gmail.com>wrote:
> Primarily I would also suggest doing IO blocking operations in a QThread,
> which can signal when it has finished as well.
> The reason it freezes your UI is because although it calls append on the
> text widgets, the eventloop will not get a chance to flush those requests
> until control leaves the for loop. They just stack up until then. If its a
> loop of a bunch of very fast operations, you could also stick a
> processEvents call in there:
>
> app = QtGui.QApplication.instance()
> for i in aRange:
> some_operation()
> app.processEvents()
>
> But if each operation is not quick then you should still use a QThread
>
>
> On Sep 25, 2012, at 11:59 PM, Panupat Chongstitwattana <panup...@gmail.com>
> wrote:
>
> Ah Threading works. Thanks. I'll have to study more about it :)
>
> Thanks
>
>
> On Wed, Sep 26, 2012 at 1:17 PM, zhang jian <zhangm...@gmail.com> wrote:
>
>> you should launch the operation in a separate thread, and send signal to
>> ui after each copy.
>>
>> zhang
>>
>> On Wed, Sep 26, 2012 at 1:29 PM, Panupat Chongstitwattana <
>> panup...@gmail.com> wrote:
>>
>>> Using Python to loop copy lots of files. While copying, I tell PyQt to
>>> append feedback to QTextEdit
>>>
>>> for scr in sources:
>>> shutil.copy(src, dst)
>>>
>>>
>>>
>>> self.feedback.append("Copying " + src)
>>>
>>> self.feedback is a QTextEdit
>>>
>>> When I start my script, PyQt would frozen up until all the copies are
>>> completed before displaying everything back to be all at once.
>>>
>>> How can I make it so that each feedback are shown back to me in real
>>> time as the files are being copied?
>>>
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