Multiple inheritance problem

[Mohsin]

I have created a ChartView class that inherits "QChartView" and "QObject".

I need to generate a SIGNAL from the ChartView class and connect to the MainWindow SLOT.

However, currently, I am getting the following error.

"direct base 'QObject' is inaccessible due to ambiguity"

class ChartView : public QChartView , public QObject
{
    Q_OBJECT
private:
 
}

class ChartView : public QChartView , public QObject
{
    Q_OBJECT
private:

}

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If I don't add QObject, then SIGNAL and SLOT don't work.

Any suggestion?

[ChristianEhrlicher]

If I don't add QObject, then SIGNAL and SLOT don't work.

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

[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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[ChristianEhrlicher]

What build system do you use? You most likely forgot to include moc_charview.h

[Cruz]

Did you try running qmake again and then a clean rebuild?

[Mohsin]

I tried but it didn't work.

The attached image contains the information about my system and Qt Version.