[PySide] Why doesn't this example work?

Eric Thomson thomson.eric at gmail.com
Thu Oct 23 05:52:26 CEST 2014


I meant to write that I put
         myWindow.repaint()
before time.sleep(3).

Incidentally, what book are you working through?

On 10/22/14, Eric Thomson <thomson.eric at gmail.com> wrote:
> Try putting
>          myWindow.repaint()
> before myWindow.show().
>
> That took away the weird behavior on my end. I cannot explain it, though.
>
> On 10/22/14, Jim Byrnes <jf_byrnes at comcast.net> wrote:
>> In looking at the lists archives, I see that most of the participants
>> seem to be experienced developers.  As a novice programmer I hope I am
>> not intruding by asking some basic questions.
>>
>> I am working my way through examples in a PySide book I bought.
>> According to the author the example should display a 200 x 150 window,
>> pause 3 seconds and then display a 300 x 300 window.  On my system
>> (Ubuntu 12.04) there is a approx 3 second delay after starting the
>> program and then I see the 300 x 300 window. I never see the first
>> window.
>>
>> Could someone explain to me why it does not act as described?
>>
>> # Import required modules
>> import sys
>> import time
>> from PySide.QtGui import QApplication, QWidget
>>
>> class SampleWindow(QWidget):
>>      """ Our main window class
>>      """
>>
>>      # Constructor function
>>      def __init__(self):
>>          QWidget.__init__(self)
>>          self.setWindowTitle("Sample Window")
>>          self.setGeometry(300, 300, 200, 150)
>>          self.setMinimumHeight(100)
>>          self.setMinimumWidth(250)
>>          self.setMaximumHeight(200)
>>          self.setMaximumWidth(800)
>>
>> if __name__ == '__main__':
>>      # Exception Handling
>>      try:
>>          myApp = QApplication(sys.argv)
>>          myWindow = SampleWindow()
>>          myWindow.show()
>>          time.sleep(3)
>>          myWindow.resize(300, 300)
>>          myWindow.setWindowTitle("Sample Window Resized")
>>          myWindow.repaint()
>>          myApp.exec_()
>>          sys.exit(0)
>>      except NameError:
>>          print("Name Error:", sys.exc_info()[1])
>>      except SystemExit:
>>          print("Closing Window...")
>>      except Exception:
>>          print (sys.exc_info()[1])
>>
>> Thanks,  Jim
>>
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>>
>



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