Setting QwtPlot's canvas as Transparent wthout stylesheet way?

[umituzun84]

Hi Uwe,

First of all thanks for reply.
I tried to make my canvas background semi transparent and transparent by;

plotHandle->setWindowOpacity(0);
    plotHandle->setAttribute(Qt::WA_TranslucentBackground);
    plotHandle->setCanvasBackground(QColor(0,0,0,0));
    plotHandle->replot();

plotHandle->setWindowOpacity(0);
    plotHandle->setAttribute(Qt::WA_TranslucentBackground);
    plotHandle->setCanvasBackground(QColor(0,0,0,0));
    plotHandle->replot();

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But this code block does't work, so I can't see behind my QwtPlot component's background where there is another widgets located.
How can I achieve this operation?
Thanks in advance.