Hello,

I want to display Destination image transparently (about 50%) over displayed source image. I did in the following way, but I am not able to achieve.

I read two images and prepared QPixmaps for those two. I displayed first image on the screen and on MouseMoveEvent I am writing second image over first.

Can anyone help me how to display an image transparently over another?

Thanks
Wizards

Qt Code: 
  1. void ImageView::OpenImage(QString path)
  2. {
  3.  
  4.     QDir currentDir(path);
  5.     QStringList files;
  6.     files = currentDir.entryList(QStringList("*.jpg"));
  7.     for(int i=0;i<files.size();i++)
  8.     {
  9.  
  10.         QString fileName=path+"/"+files.at(i);
  11.          if(i>=2)
  12.             break;
  13.         images[i].load(fileName);
  14.  
  15.     }
  16.     m_SrcPixmap=QPixmap::fromImage(images[0]);
  17.     m_DestPixmap=QPixmap::fromImage(images[1]);
  18.  
  19.     update();
  20. }
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Qt Code: 
  1. void ImageView::paintEvent(QPaintEvent *event)
  2. {
  3.       QPainter p(this);
  4.  
  5.         p.drawPixmap(150,150,m_SrcPixmap.width(),m_SrcPixmap.height(),m_SrcPixmap);
  6.  
  7. }
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Qt Code: 
  1. void ImageView::mouseMoveEvent(QMouseEvent *me)
  2. {
  3.     if(me->buttons()==Qt::LeftButton)
  4.     {
  5.         QPainter painter(&m_SrcPixmap);
  6.  
  7.         painter.setCompositionMode(QPainter::CompositionMode_Overlay);
  8.         painter.drawPixmap(me->x(),me->y(), m_DestPixmap);
  9.  
  10.  
  11.         painter.end();
  12.         update();
  13.     }
  14.  
  15. }
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