Hi!
I've no explanation neither... But I'd say that may be due to the fact that
during the time.seep, your application is not processing GUI events since at
that point app.exec_() has not yet been called). You could try to make a pause
by using a QTimer, but that'd imply to app.exec_() before (and maybe you
precisely want to avoid that...)
you could also try :
for t in range(3)
for i in range(100): # Strange name to avoid defining local variable...
app.processEvents()
time.sleep(1)
I had to do that to have a QSplashScreen to display properly (and a
QSplashScreen definitely is a window outside the application loop, like what I
understand you try to do)
stF
Jim Byrnes <[email protected]> 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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