hled.h Example File

    #ifndef HLED_H
    #define HLED_H

    #include <QWidget>

    class QColor;

    class HLed : public QWidget
    {
        Q_OBJECT
    public:
        HLed(QWidget *parent = 0);
        ~HLed();

        QColor color() const;
        QSize sizeHint() const;
        QSize minimumSizeHint() const;

    public slots:
        void setColor(const QColor &color);
        void toggle();
        void turnOn(bool on=true);
        void turnOff(bool off=true);

    protected:
        void paintEvent(QPaintEvent *);
        int ledWidth() const;

    private:
        struct Private;
        Private * const m_d;
    };

    #endif // HLED_H