myT.h

#ifndef MYT_H
#define MYT_H
#include <QTextEdit>
#include <QWheelEvent>
#include <QApplication>
#include <QDebug>

class myT : public QTextEdit
{
    Q_OBJECT

public slots:
    void v()
    {
        qDebug() << Q_FUNC_INFO;
        QWheelEvent e(QPoint(0,0),-120,0,0,Qt::Vertical);
        this->setFocus();
        qApp->sendEvent(this,&e);
        //qApp->postEvent(this,e);
        qApp->processEvents();
    }


protected:
    bool event(QEvent *e)
    {
        QWheelEvent *ev = dynamic_cast<QWheelEvent*>(e);
        if(ev)
            qDebug() << ev->delta();
        return QTextEdit::event(e);
    }

    void wheelEvent(QWheelEvent *e)
    {
        qDebug() << "pos: " << e->pos();
        qDebug() << "delta: " << e->delta();
        qDebug() << "buttons: " << e->buttons();
        qDebug() << "modifiers: " << e->modifiers();
        qDebug() << "orient: " << e->orientation();

        QTextEdit::wheelEvent(e);
    }
};

#endif // MYT_H