Capture multiple screens desktop image using Qt4

Question

i am writing a screen capture application in Qt4 with c++. I have a problem when tuning on dual screens. I am unable to get an image with the second screen. I tried a c# applica

Answer 1

With a virtual desktop, the QPixmap::grabWindow method seems to return a screenshot with the size of the primary screen. Passing in the dimensions of the full virtual desktop returns a screenshot of both monitors;

  QDesktopWidget *desktop = QApplication::desktop();
  QPixmap screenshot = QPixmap::grabWindow(desktop->winId(), 0, 0, desktop->width(), desktop->height());

Yet to test this behaviour on a Unix / Mac box, but it works under Windows 7.