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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 Jack <naruto0.1@live.cn> - 2013-08-05 09:37 +0800

#51945 — Re: In pyqt, some signals seems not work well

On 2013/8/5 2:20, Vincent Vande Vyvre wrote:
> 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)
>
I'm sorry.
In run() function the code below
> for dirpath, dirnames, filenames in os.walk(self.root): # What is 
> 'self' here ?
     self is current object, isn't it? self.root is a path which the 
user will specify.
> for filename in filenames:
> self.sig_set_label_text.emit('current', self.current()) # where is 
> 'current' ?
> # so something
     self.current() is a getter, it just returns a member that shows the 
path of the current work.
>
> #self.dialog.set_found(str(self.found())) # What is self, and dialog, 
> and found ?
     the main thread is a dialog object.
     self.dialog was assigned the dialog object in the __init__ of 
worker class.
     self.found() is a getter also, it returns the number of meeting the 
conditions. self.total() means like this.
> #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()
>
     dialog.set_all() and so on just sets the widget's text.

My English is poor, I hopeyou will excuse me.

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