[Qt-interest] widget update problem

[Malyushytsky, Alex]

Sorry, don't think my explanation was clear.
Update does not cause an immediate repaint.
It schedules a paint event for processing when Qt returns to the main event loop.

Regards, 
  Alex



-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Malyushytsky, Alex
Sent: Thursday, October 01, 2009 3:15 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] widget update problem

Update does not update the widget.
QT itself is optimizing the events, so it may skip undesired updates.
What you may try, you may QApplication to process events  before calling sleep.
Look at QCoreApplication::processEvents

Regards,
        Alex


-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of "Alexander Carôt"
Sent: Thursday, October 01, 2009 2:39 PM
To: qt-interest at trolltech.com
Subject: [Qt-interest] widget update problem

Hi all,

I have a question related to a simple animation of a widget: After the click of a button I want to make another widget visible and moving it from left to right. I created a slot, which is triggered by the button click:

void JamDesk::jamButtonClicked(){
  ui.LMixer->setVisible(true);

  for (int i=1;i<5;i++){
    ui.LMixer->setGeometry(i, ui.LMixer->y(),
                           ui.LMixer->width(),ui.LMixer->height() );
    this->update();
    sleep(1000);
  }
}

So, it should be visible and then move from x-coordinate 1 to 4 and after each move it should stop moving for one second. This, however, doesn't work: What happens instead is that I don't see anything for 5 seconds and then it shows up at the final and correct spot. Update and repaint don't work althoug the widget has updates enabled.

Can anyone tell where my problem is ?

Thanks

-- A l e x


--
Dr.-Ing. Alexander Carôt
Email : Alexander at Carot.de
Tel.: +49 (0)177 5719797



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