Hi,
At first glance, it seems that the 'API' is just a text string filled with different kinds of information. Seems not right to use this as a method to interface with an object in C++.
Also, I would just create chart objects that paint on a painter object. Then you can paint the chart on anything. You can make a convenience class derived from QGraphicsItem to make it easier to put a chart on a QGraphicsView. And you can also make a widget derived class to put it on a dialog.
Regards,
Marc
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