I'm not sure right now if they used != only for iteration with iterators in "C++ Primer", but I'm quite sure that they did it in "QT 4.6 - Gui Entwicklung" without iterators.

But anyway, here's the whole paintEvent:
Qt Code: 
  1. void K15_TilesetEditWidget::paintEvent(QPaintEvent *pe)
  2. {	
  3. 	QPainter painter(this);
  4. 	if(curTileset != NULL) {
  5. 			//1.Tileset gets drawn.
  6. 			for(int i = 0;i != curTileset->getTileContainer()->size();i++)
  7. 				painter.drawPixmap(*curTileset->getTileContainer()->at(i)->getPosition(),*curTileset->getTileContainer()->at(i)->getTileImage());
  8.  
  9. 			//2.Collision gets drawn (if collisionMode is true)
  10. 			if(this->mode == selectCollision)
  11. 				for(int i = 0;i != curTileset->getTileContainer()->size();i++) {
  12. 					//Attention!Multiline Code
  13. 					painter.drawPixmap*(curTileset->getTileContainer()->at(i)->getPosition(),
  14. 						*curTileset->getTileContainer()->at(i)->getCollisionType()->getPixmap());
  15. 					}
  16.  
  17. 			//3.TileID gets drawn (if true)
  18. 			if(this->tileIDsVisible) 
  19. 				for(int i = 0;i != curTileset->getTileContainer()->size();i++) 
  20. 					//Attention!Multiline Code
  21. 					painter.drawText(curTileset->getTileContainer()->at(i)->getPosition()->x() + 12,
  22. 						curTileset->getTileContainer()->at(i)->getPosition()->y() + 12,
  23. 						QString().setNum(curTileset->getTileContainer()->at(i)->getTilesetID()));
  24.  
  25. 			//4.Grid gets drawn (if true)
  26. 			if(this->gridVisible) {
  27. 				for(int i = 0;i <= curTileset->getImage()->height();i += 32)
  28. 					painter.drawLine(0,i,curTileset->getImage()->width(),i);
  29.  
  30. 				for(int j = 0;j <= curTileset->getImage()->width();j += 32) 
  31. 					painter.drawLine(j,0,j,curTileset->getImage()->height());	
  32. 				}
  33. 		}
  34. 	}
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Thanks btw for your help so far.