HI all,
i have a requirement to display a transparent window such that when it is displayed i should be able to see my Desktop.

I have used setWindowOpacity() for this but it dosen't work.
Plz give me suggestion to correct my program.
Below is a small piece of code..................

Qt Code: 
  1. TransparentWindow::TransparentWindow(QWidget *parent)
  2. 	: QDialog(parent, Qt::FramelessWindowHint)
  3. {
  4.  
  5. 	QPushButton *bttn = new QPushButton("Test",this);
  6. 	bttn->setGeometry( QRect( 150, 100,200, 25 ) );
  7. 	connect(bttn, SIGNAL(clicked()), this, SLOT(setOpaque()));
  8.  
  9.     setWindowTitle(tr("Transparent Window"));
  10.     //setFixedHeight(sizeHint().height());
  11.  
  12.  
  13. }
  14. void TransparentWindow::paintEvent(QPaintEvent *)
  15. {
  16. 	QPainter painter(this);
  17.     	QLinearGradient grad(0, 0, rect().width(), rect().height());
  18.  
  19.     	painter.fillRect(0, 0, rect().width(), rect().height(), grad);
  20.  
  21. }
  22.  
  23. void TransparentWindow::setOpaque()
  24. {
  25.     setAttribute(Qt::WA_NoSystemBackground, true);
  26.     setAttribute(Qt::WA_TranslucentBackground, true);
  27.     setWindowOpacity(0.1);
  28.     repaint();
  29.  
  30. }
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Regards

Raghav