Dear Uwe,

I'm trying to change background color of QwtPlotOpenGLCanvas from black to white but it doesn't seem to work in multiaxis branch. By the way previously I worked with Qwt from trunk and there it worked fine.
Qt Code:
  1. QwtPlot* plot = new QwtPlot;
  2. QwtPlotOpenGLCanvas *canvas = new QwtPlotOpenGLCanvas(); // NEW OpenGL Canvas
  3. plot->setCanvasBackground( Qt::white );
  4. plot->setCanvas(canvas);
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the canvas is black