In pyqt, some signals seems not work well
Jack
naruto0.1 at live.cn
Sun Aug 4 21:37:46 EDT 2013
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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