[Qt-interest] QPainter::drawPixmap drawing partial image on first running

[Arun Kumar]

Hi,

I created a banner to display image on Label for that I subclassed QLabel
to a new class and override its events, Now my problem is sometime it
display image in distorted manner (One image on top of the another with
partial draw) I dont understand why this happening, I tried
"this->update();" function to refresh it, but the problem still exist, my
code is given below and my development environment is on Mac OS


  void QPictureLabel::setPixmap(QPixmap aPicture)
{

if (_qpSource.isNull()) //no image was set, don't draw anything
        return;

    _qpSource = _qpCurrent = aPicture;
    repaint();
}

void QPictureLabel::paintEvent(QPaintEvent *aEvent)
{
    QLabel::paintEvent(aEvent);

float cw = width(), ch = height();
_qpCurrent = _qpSource.scaled(cw,
ch,Qt::IgnoreAspectRatio,Qt::SmoothTransformation);
  QPainter paint(this);

    paint.drawPixmap(0, 0, _qpCurrent);

}
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