TestTooltip::TestTooltip(const QString &message,
                           QWidget* parent)
    : QWidget(parent, Qt::ToolTip)
    , m_msgLabel(new QLabel(message, this))
    { 
        QVBoxLayout *layout = new QVBoxLayout();

        layout->addWidget(m_msgLabel);
        setLayout(layout);
    }

    TestTooltip::~TestTooltip()
    {
    }

    void TestTooltip::updateTooltip(QWidget *wid)
    {
        QPoint const pos = wid->mapToGlobal(QPoint(wid->width() / 2, 0));

	    QScreen* screen = QApplication::screenAt(wid->mapToGlobal(QPoint(0,0)));
        if (screen == nullptr)
        {
            return;
        }

        QRect scr = screen->geometry();
        updateGeometry();

        QSize sz = sizeHint();

        move(qMax(pos.x() - 27,
                  scr.left() + 2),
             pos.y() - sz.height());
    }

    LabelWithTooltip::LabelWithTooltip(const QString &text, QWidget *parent)
    : QLabel(text, parent)
    , m_tooltip(new TestTooltip(text, nullptr))
    {
        setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        setContentsMargins(0, 0, 0, 0);
    }

    LabelWithTooltip::~LabelWithTooltip()
    {
        delete m_tooltip;
    }

    void LabelWithTooltip::enterEvent(QEnterEvent *event)
    {
        QLabel::enterEvent(event);

        m_tooltip->updateTooltip(this);
        m_tooltip->show();
    }

    void LabelWithTooltip::leaveEvent(QEvent *event)
    {
        QLabel::leaveEvent(event);
        m_tooltip->hide();
    }

    void LabelWithTooltip::showEvent(QShowEvent *event)
    {
        QLabel::showEvent(event);

        // update position of the tooltip when the label appears
        m_tooltip->updateTooltip(this);
    }

    void LabelWithTooltip::resizeEvent(QResizeEvent *event)
    {
        QLabel::resizeEvent(event);

        // update position of the tooltip when the label size changes
        m_tooltip->updateTooltip(this);
    }

    void LabelWithTooltip::moveEvent(QMoveEvent *event)
    {
        QLabel::moveEvent(event);

        // update position of the tooltip when the label position changes
        m_tooltip->updateTooltip(this);
    }

    QSize LabelWithTooltip::sizeHint() const
    {
        return(QSize(200, 20));
    }