Combo

/* Combobox class */
class HoverableComboBox : public QComboBox
{
    Q_OBJECT

public:
    HoverableComboBox() { this->installEventFilter(this); }
    /*~HoverableComboBox();*/

signals:
    void opened();
    void closed();

private:
public:
    void hidePopup()
    {
       QComboBox::hidePopup();
       emit closed();
    }

    void showPopup()
    {
       QComboBox::showPopup();
       emit opened();
    }
    void paintEvent(QPaintEvent * e)
    {
        QComboBox::paintEvent(e);
    }
};