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Re: In pyqt, some signals seems not work well

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  Re: In pyqt, some signals seems not work well Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-08-04 20:20 +0200

#51934 — Re: In pyqt, some signals seems not work well

Le 04/08/2013 18:06, Jacknaruto a écrit :
> Hi, Guys!
>
> I created a thread class based QThread, and defined some signals to 
> update UI through main thread.
>
> the UI used a stackedWidget,someone page named 'progressPage' have a 
> progressBar and a Label, the next page named 'resultsPage' shows 
> results(some Labels).
>
> When the window showed progressPage, my code that updates progressBar 
> was well, but the updating resultsPage's labels signals seems ignored 
> by main thread.(I guess, because I added some prints in the slot, it 
> wasn't printed)
>
> the code like this:
>
>  1. class worker(QtCore.QThread):
>  2. sig_jump_finish_page = QtCore.pyqtSignal()
>  3. sig_set_label_text = QtCore.pyqtSignal(str, str)
>  4. sig_set_progress_value = QtCore.pyqtSignal(int)
> 5.
>
>  6. for dirpath, dirnames, filenames in os.walk(self.root):
>  7. for filename in filenames:
>  8. self.sig_set_label_text.emit('current', self.current()) # work well
>  9. # so something
>10.
>
> 11. #self.dialog.set_found(str(self.found())) # work well
> 12. #self.dialog.set_all(str(self.total())) # work well
> 13. self.sig_set_label_text.emit('found', str(self.found())) # :(
> 14. self.sig_set_label_text.emit('all', str(self.total())) # :(
>15.
>
> 16. self.sig_jump_finish_page.emit()
>
>
> So I have to update UI directly in the thread(comments Line 11-12 
> shows), it looks work well.
>
> I found the difference between line 8 and line 13-14 is line 8 
> manipulates current page -progressPage, line 13-14 manipulates next 
> page -resultsPage.
>
> Is some wrongs in there?
>
>
>
>
>
Have a look at my comments:

class worker(QtCore.QThread):
sig_jump_finish_page = QtCore.pyqtSignal()
sig_set_label_text = QtCore.pyqtSignal(str, str)
sig_set_progress_value = QtCore.pyqtSignal(int)

for dirpath, dirnames, filenames in os.walk(self.root): # What is 'self' 
here ?
for filename in filenames:
self.sig_set_label_text.emit('current', self.current()) # where is 
'current' ?
# so something

#self.dialog.set_found(str(self.found())) # What is self, and dialog, 
and found ?
#self.dialog.set_all(str(self.total())) # ...
self.sig_set_label_text.emit('found', str(self.found())) # again ?
self.sig_set_label_text.emit('all', str(self.total())) # etc

self.sig_jump_finish_page.emit()

-- 
Vincent V.V.
Oqapy <https://launchpad.net/oqapy> . Qarte 
<https://launchpad.net/qarte> . PaQager <https://launchpad.net/paqager>

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