Add clickable image banner in QToolBar

mainwindow.cpp

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent), ui(new Ui::MainWindow)
{
  // somewhere after ui->setupUi(this);
  ui->mainToolBar->addWidget(spacer);
  ui->mainToolBar->addWidget(new MyClickableBanner(this));
  // ...
}

myclickablebanner.cpp

#include "myclickablebanner.h"

MyClickableBanner::MyClickableBanner(QWidget *parent) :
    QLabel(parent)
{
    pixmap = new QPixmap(":/images/banner.png");
    url = new QUrl("http://google.com");

    setPixmap(*pixmap);
}

bool MyClickableBanner::event(QEvent *e)
{
    if(e->type() == QEvent::Enter) {
        QApplication::setOverrideCursor(QCursor(Qt::PointingHandCursor));
    }
    else if(e->type() == QEvent::Leave) {
        QApplication::restoreOverrideCursor();
    }
    else if(e->type() == QEvent::MouseButtonPress) {
        QDesktopServices::openUrl(*url);
    }

    QLabel::event(e);
}

myclickablebanner.h

#ifndef MYCLICKABLEBANNER_H
#define MYCLICKABLEBANNER_H

#include <QLabel>
#include <QUrl>
#include <QEvent>
#include <QApplication>
#include <QDesktopServices>

class MyClickableBanner : public QLabel
{
    Q_OBJECT
public:
    explicit MyClickableBanner(QWidget *parent = 0);

private:
    QPixmap* pixmap;
    QUrl* url;
    bool cursorOverridden = false;

protected:
    bool event(QEvent *e);
};

#endif // MYCLICKABLEBANNER_H