I have implemented a class that inherits from QwtScaleDraw, in order to overwrite the method draw, to be used in the hot zones in the scale, but it seems that I can't use an object of this class, in the method setScaleDraw(QwtScaleDraw*) of another class that I implement, that inherits from QwtSlider, anyway, as I've been using this library from a little while, it is difficult for me. Could you give me a more specific indication? Thanks.
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