Multiple inheritance problem

[Mohsin]

What does this mean? You don't need to derive from QObject since QChartView also has QObject as base class.

I am getting errors (shown in the image) even when I use the following code

class ChartView : public QChartView
{
    Q_OBJECT
 
signals:
 void  updateGraphOrder();
 
 
}

class ChartView : public QChartView
{
    Q_OBJECT

signals:
 void  updateGraphOrder();


}

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