myvolume.h

#ifndef MYVOLUME_H
#define MYVOLUME_H

#define PYV_LEFT_SPACE 5
#define PYV_TOP_SPACE 3
#define PYV_TIMER_INTERVAL 500
#define PYV_BAR_COUNT 10
#define PYV_RECT_RADIUS 3
#define PYV_OPACITY 0.4

#define PYV_BAR_DEFAULT_START_COLOR QColor(167,167,167)
#define PYV_BAR_DEFAULT_END_COLOR QColor(45,45,45)
#define PYV_BG_COLOR Qt::black

#define PYV_BAR_START_COLOR QColor(85,255,0)
#define PYV_BAR_MIDDLE_COLOR QColor(249,216,47)
#define PYV_BAR_END_COLOR QColor(249,107,24)

#include <QWidget>
#include <QtGui>


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

public:
    void setValue(int value);
    int value() const;

protected:
    void paintEvent(QPaintEvent *);

    QSize sizeHint() const
    {
        return QSize(80,200);
    }


private:
    void drawBg(QPainter* painter);
    void draw(QPainter* painter);

private:
    void initVariables();
    int m_nValue;
    QTimer* m_decreTimer;

private slots:
    void DoDecrement();

};

#endif // MYVOLUME_H