Transparent window with QGLWidget

[ultr]

Hello,

I need to create a window in Qt which will be transparent
(like in xeyes command) and will contain QGLWidget in it, also
transparent. So that the result of rendering i.e. a cube in the
QGLWidget will just draw the cube on the desktop.

Is it possible? Or does it require extensions to X or Xgl server to
allow this?

I have been looking for the solution quite much, but cannot find
anything interesting.

Thanks for your answers,
ultr

[wysota]

QWidget::setMask()

[showhand]

I met the same problem with you. How do you set the transparent window and draw graphics with opengl commands in QGLWidget. As I know, QWidget::setMask() does not take effective on QGLWidget. Would you please give some example code to me or picture of your program?

Thanks for any replay!

[20khz]

does the problem still remain unsolved?

[wysota]

I can think of using a regular widget instead of QGLWidget and rendering the GL data to a buffer instead of the screen, so that then you'll be able to apply a mask on the resulting image (at least in Qt4). Unfortunately it's not easy to have the mask itself... I can think of using the bluebox approach for it, if you don't use multisampling, it might just work.