Layering a QGLWidget on top of a qwidget



  • I'm writing what is essentially a multi-trace oscilloscope viewer. It appears that the most efficient way to draw the traces of the signal is to use raw OpenGL draw commands, i.e., in my paintGL() :

    @glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(2, GL_FLOAT, 0, data.constData());
    glDrawArrays(GL_LINE_STRIP,0,data.size()-1);
    glDisableClientState(GL_VERTEX_ARRAY);@

    Ideally, I want to have the borders and tick marks for this line (which is constantly moving) drawn in a QWidget that lives below the qglwidget. However, I can't seem to get this to work. If I don't make the QGLWidget draw a background, I see through to my desktop underneath. Any hints at how to stack a transparent QGLWidget on top of a QWidget?

    thanks!



  • Why not just use OpenGL to also draw the borders and tick marks?



  • That's the current implementation, but it ends up being somewhat klugy. Ideally, I'd like to make the background stuff easily modifiable/"skinable".


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