fader.h

linux窗口程序设计一书的第三章代码－对话框进阶,希望对大家有用

#ifndef FADER_H
#define FADER_H

#include <QWidget>

class QColor;
class QTimer;

class FaderWidget : public QWidget
{
    Q_OBJECT

public:
    FaderWidget(QWidget *parent);
    
    void start();
    
protected:
    void paintEvent(QPaintEvent *event);
    
private:
    QTimer *timer;
    int currentAlpha;
    QColor startColor;
    int duration;
};

#endif  // FADER_H