QHoverEvent in a QPushButton (and leaveEvent and enterEvent)

main.cpp

#include <QApplication>
#include "mypushbutton.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MyPushButton pb;
    pb.show();
    return a.exec();
}

mypushbutton.cpp

#include "mypushbutton.h"
#include <QDebug>

MyPushButton::MyPushButton(QWidget *parent) :
    QPushButton(parent)
{
    setAttribute(Qt::WA_Hover);
//    this->setMouseTracking(true);
    m_count = 0;
    this->setText(QString::number(m_count));
}

bool MyPushButton::event(QEvent * e)
{
    switch(e->type())
    {
    case QEvent::HoverEnter:
        hoverEnter(static_cast<QHoverEvent*>(e));
        return true;
        break;
    case QEvent::HoverLeave:
        hoverLeave(static_cast<QHoverEvent*>(e));
        return true;
        break;
    case QEvent::HoverMove:
        hoverMove(static_cast<QHoverEvent*>(e));
        return true;
        break;
    default:
        break;
    }
    return QWidget::event(e);
}

void MyPushButton::enterEvent(QEvent * e)
{
    qDebug() << Q_FUNC_INFO << e->type();
}

void MyPushButton::leaveEvent(QEvent * e)
{
    qDebug() << Q_FUNC_INFO << e->type();
}


void MyPushButton::hoverEnter(QHoverEvent * event)
{
    qDebug() << Q_FUNC_INFO << event->type();
}

void MyPushButton::hoverLeave(QHoverEvent * event)
{
    m_count = 0;
    qDebug() << Q_FUNC_INFO << event->type();
    this->setText(QString::number(m_count));
}

void MyPushButton::hoverMove(QHoverEvent * event)
{
    m_count++;
    qDebug() << Q_FUNC_INFO << event->type() << m_count;
    this->setText(QString::number(m_count));
}

mypushbutton.h

#ifndef MYPUSHBUTTON_H
#define MYPUSHBUTTON_H

#include <QPushButton>
#include <QHoverEvent>
#include <QEvent>
#include <QDebug>

class MyPushButton : public QPushButton
{
    Q_OBJECT
public:
    explicit MyPushButton(QWidget *parent = 0);
    
protected:
    void enterEvent(QEvent *);
    void leaveEvent(QEvent *);
    bool event(QEvent * e);

    void hoverEnter(QHoverEvent * event);
    void hoverLeave(QHoverEvent * event);
    void hoverMove(QHoverEvent * event);

signals:
    
public slots:
    
private:
    int m_count;
};

#endif // MYPUSHBUTTON_H