reference to connect is ambiguous QQuickItem QMainWindow QCustomPlot

I am trying to use QCustomPlot's example of the following folder, in my program:

/examples/plots

and at the same time I want it accessible from QML. So, I added <QQuickItem> and it resulted in the error stated in the title.

The code:

Code:

---

#include <QQuickItem>
#include <QMainWindow>
#include <QTimer>
#include "../../qcustomplot.h" 
 
namespace Ui {
class MainWindow;
}
 
class MainWindow :  public QQuickItem, public QMainWindow
{
  Q_OBJECT

---

What should I do to make it accessible from QML and solve the error too?

QMainWindow and QQuickItem are QObject subclasses.You can only derive from QObject once.

QMainWindow is also a QWidget, which is not something you can display in a QtQuick2 scene anyway.

Cheers,
_

Or if you want a QMainWindow like thing in QML, you can have a look at QML's Window element