How can I get paint events with QtWebEngine?

Question

I extended QWebEngineView.

#ifndef MYQWEBENGINEVIEW_H
#define MYQWEBENGINEVIEW_H
#include 

        

Answer 1

My demand is disabling the mouse click. Follow Orest's answer, the "w" always is NULL in the Qt 5.9.3.

QOpenGLWidget *w = qobject_cast(child_ev->child());

So I modify the answer follow Orest. That is more suitable for Qt 5.9.x.

#ifndef CUSTOMWEBVIEW_H
#define CUSTOMWEBVIEW_H

#include 
#include 
#include 
#include 

class CustomWebView : public QWebEngineView
{
    Q_OBJECT

public:
    CustomWebView(QWidget* parent = Q_NULLPTR);

protected:
    bool event(QEvent* evt)
    {
        qDebug() << evt->type();

        if (evt->type() == QEvent::ChildPolished)
        {
            QChildEvent *child_ev = static_cast(evt);
            childObj = child_ev->child();

            if (childObj)
            {
                childObj->installEventFilter(this);
            }
        }

        return QWebEngineView::event(evt);
    }

    bool eventFilter(QObject *obj, QEvent *ev)
    {
        if (obj == childObj
                && (ev->type() == QEvent::MouseButtonPress
                    || ev->type() == QEvent::MouseButtonDblClick))
        {
            return true;
        }

        return QWebEngineView::eventFilter(obj, ev);
    }

private:
    QObject *childObj = NULL;
};

#endif // CUSTOMWEBVIEW_H