Hello
I need QCustomPlot drawn with transparent background over other widget. I.e. this widget becomes plot's background.
I'm trying set both plot's and axisRect's background to Qt::transparent ot Qt::NoBrush. But background becomes just black, not transparent.

    plot->setBackground (QBrush(Qt::transparent));
    plot->axisRect()->setBackground(QBrush(Qt::transparent));

Thanks