I'm missing something:
In the following code, I must display a QMessageBox to get a correct QPixmap (with a chart in it).
Do you know what's the problem?

Thanks.
Regards,
Oscar

Qt Code: 
  1. QPixmap MyExport::drawPie(int size, QList<int> valueList, QList<QString> colorList) {
  2.  
  3. 	QPixmap qPixmap(size,size);
  4. 	QPainter *myQPainter = new QPainter(&qPixmap);
  5.  
  6. 	myQPainter->setBrush(QBrush(QColor(245,245,245)));
  7. 	myQPainter->drawRect(0,0,size,size);
  8.  
  9. 	double startAngle = 0.0;
  10. 	double totalValue; foreach(int value, valueList) totalValue += value;
  11.  
  12. 	for (int i=0; i<valueList.size(); i++) {
  13. 		 if (valueList[i] > 0.0) {
  14. 			double angle = 360*valueList[i]/totalValue;
  15. 			QColor color = QColor(colorList[i]);
  16. 			myQPainter->setBrush(QBrush(color));
  17. 			myQPainter->drawPie(0, 0, size-2, size-2, int(startAngle*16), int(angle*16));
  18. 			startAngle += angle;
  19. 		 }
  20. 	}
  21. 	delete myQPainter;
  22.  
  23. 		QMessageBox::information(NULL, QString::fromUtf8("Warn"),
  24. 					  QString::fromUtf8("This messagebox must be called to make this example function"),
  25. 							  QString::fromUtf8("Quitter"));
  26. 	return qPixmap;
  27. }
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