rotate a QPixmap which is set on top of a QLabel

[rishiraj]

Hi,
I can't figure out how to rotate a picture which is set on top of a Label(in Qt 4.4.3)
In Qt 3.3,I did it this way---

int count=0;
void pic_dis::rotate()
{
 count++;
 QPixmap pm1 = QPixmap(fileName); //fileName is the complete path to the  
                                                             //picture             
                                                              //which I need to rotate
 QMatrix m1 ;
    m1.rotate( (90*count)%360 );
    if(count%2==1)
     {
    m1.scale((double)420/pm1.width(),
                        (double)750/pm1.height());
}
    else
	  m1.scale((double)750/pm1.width(),
                        (double)420/pm1.height());
    pm1 = pm1.xForm(m1);
    pic_display->setPixmap(pm1);
}

int count=0;
void pic_dis::rotate()
{
 count++;
 QPixmap pm1 = QPixmap(fileName); //fileName is the complete path to the  
                                                             //picture             
                                                              //which I need to rotate
 QMatrix m1 ;
    m1.rotate( (90*count)%360 );
    if(count%2==1)
     {
    m1.scale((double)420/pm1.width(),
                        (double)750/pm1.height());
}
    else
	  m1.scale((double)750/pm1.width(),
                        (double)420/pm1.height());
    pm1 = pm1.xForm(m1);
    pic_display->setPixmap(pm1);
}

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xForm isn't available in Qt 4.4.3.

Please suggest on what changes I should make in the code to make it work in Qt 4.4.3.
Thanks for your time.

[wysota]

Have a look at QPixmap::transformed().

[rishiraj]

Thank you.Your suggestion worked.
****in case anyone's having the same problem as I was having,I am pasting the working code below********

int count =0;         //count keeps track of the number of times you click thw rotate button
 void ImageViewer::rotate()              //slot which is called on clicking rotate
  {
      count++;
      QPixmap pm=QPixmap(fileName);  //fileName is the picture that you are displaying 
      QMatrix mat;
      mat.rotate((90*count)%360);  //rotation operation
      if(count%2==1)           //code which rotates pic by 90,180,360 depending on the number
                                        //of times you click 'rotate'
        {
         mat.scale((double)420/pm.width(),(double)750/pm.height());
        }
      else
         mat.scale((double)750/pm.width(),(double)420/pm.height());
         QPixmap pm1=pm.transformed(mat);  //saving the changed QPixmap in a new QPixmap
         imageLabel->setPixmap(pm1);   //setting changed Pixmap on the label
 
  }

int count =0;         //count keeps track of the number of times you click thw rotate button
 void ImageViewer::rotate()              //slot which is called on clicking rotate
  {
      count++;
      QPixmap pm=QPixmap(fileName);  //fileName is the picture that you are displaying 
      QMatrix mat;
      mat.rotate((90*count)%360);  //rotation operation
      if(count%2==1)           //code which rotates pic by 90,180,360 depending on the number
                                        //of times you click 'rotate'
        {
         mat.scale((double)420/pm.width(),(double)750/pm.height());
        }
      else
         mat.scale((double)750/pm.width(),(double)420/pm.height());
         QPixmap pm1=pm.transformed(mat);  //saving the changed QPixmap in a new QPixmap
         imageLabel->setPixmap(pm1);   //setting changed Pixmap on the label
     
  }

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