hi friends,

I just drawn grid lines in the QGraphicsView on its

Qt Code: 
  1. drawbackground(QPainter *painter, const QRectF &rect)
  2. {
  3. QVarLengthArray<QLineF, 100> linesX;
  4.     for (qreal x = left; x < sceneRect.right(); x += gridInterval )
  5.     {
  6.  
  7.         linesX.append(QLineF(x, sceneRect.top(), x, sceneRect.bottom()));
  8.     }
  9.  
  10.     QVarLengthArray<QLineF, 100> linesY;
  11.     for (qreal y = top; y < sceneRect.bottom(); y += gridInterval ){
  12.  
  13.         linesY.append(QLineF(sceneRect.left(), y, sceneRect.right(), y));
  14.     }
  15.  
  16.     painter->drawLines(linesX.data(), linesX.size());
  17.     painter->drawLines(linesY.data(), linesY.size());
  18. }
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and im scaling the view by
Qt Code: 
  1. wheelEvent(QWheelEvent *event)
  2. {
  3.     if(event->modifiers().testFlag(Qt::ControlModifier))
  4.     {
  5.          int numSteps = event->delta() / 15/ 8;
  6.  
  7.         if (numSteps == 0)
  8.         {
  9.             event->ignore();
  10.             return;
  11.         }
  12.  
  13.         qreal sc = pow(1.25, numSteps);
  14.          QRectF r(0, 0, 1, 1);
  15.     qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(r).width();
  16.  
  17.     if(factor < 1)
  18.         return;
  19.  
  20.     this->scale(scaleFactor, scaleFactor);
  21. event->accept();
  22. }
  23. }
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now how i can ignore the grid lines not to be scaled .
as u can see even the grid lines also getting scaled every time i zoom .
if it is a graphicsItem i can use ignore transform but for normal painter ..?

i tried QPainter::resetTransform() but in vain ..

Please help me ..