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    41 

    42 #ifndef QTIMELINE_H

    43 #define QTIMELINE_H

    44 

    45 #include <QtCore/qeasingcurve.h>

    46 #include <QtCore/qobject.h>

    47 

    48 QT_BEGIN_HEADER

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 QT_MODULE(Core)

    53 

    54 class QTimeLinePrivate;

    55 class Q_CORE_EXPORT QTimeLine : public QObject

    56 {

    57     Q_OBJECT

    58     Q_PROPERTY(int duration READ duration WRITE setDuration)

    59     Q_PROPERTY(int updateInterval READ updateInterval WRITE setUpdateInterval)

    60     Q_PROPERTY(int currentTime READ currentTime WRITE setCurrentTime)

    61     Q_PROPERTY(Direction direction READ direction WRITE setDirection)

    62     Q_PROPERTY(int loopCount READ loopCount WRITE setLoopCount)

    63     Q_PROPERTY(CurveShape curveShape READ curveShape WRITE setCurveShape)

    64     Q_PROPERTY(QEasingCurve easingCurve READ easingCurve WRITE setEasingCurve)

    65 public:

    66     enum State {

    67         NotRunning,

    68         Paused,

    69         Running

    70     };

    71     enum Direction {

    72         Forward,

    73         Backward

    74     };

    75     enum CurveShape {

    76         EaseInCurve,

    77         EaseOutCurve,

    78         EaseInOutCurve,

    79         LinearCurve,

    80         SineCurve,

    81         CosineCurve

    82     };

    83 

    84     explicit QTimeLine(int duration = 1000, QObject *parent = 0);

    85     virtual ~QTimeLine();

    86 

    87     State state() const;

    88 

    89     int loopCount() const;

    90     void setLoopCount(int count);

    91 

    92     Direction direction() const;

    93     void setDirection(Direction direction);

    94 

    95     int duration() const;

    96     void setDuration(int duration);

    97 

    98     int startFrame() const;

    99     void setStartFrame(int frame);

   100     int endFrame() const;

   101     void setEndFrame(int frame);

   102     void setFrameRange(int startFrame, int endFrame);

   103 

   104     int updateInterval() const;

   105     void setUpdateInterval(int interval);

   106 

   107     CurveShape curveShape() const;

   108     void setCurveShape(CurveShape shape);

   109 

   110     QEasingCurve easingCurve() const;

   111     void setEasingCurve(const QEasingCurve &curve);

   112 

   113     int currentTime() const;

   114     int currentFrame() const;

   115     qreal currentValue() const;

   116 

   117     int frameForTime(int msec) const;

   118     virtual qreal valueForTime(int msec) const;

   119 

   120 public Q_SLOTS:

   121     void start();

   122     void resume();

   123     void stop();

   124     void setPaused(bool paused);

   125     void setCurrentTime(int msec);

   126     void toggleDirection();

   127 

   128 Q_SIGNALS:

   129     void valueChanged(qreal x);

   130     void frameChanged(int);

   131     void stateChanged(QTimeLine::State newState);

   132     void finished();

   133 

   134 protected:

   135     void timerEvent(QTimerEvent *event);

   136 

   137 private:

   138     Q_DISABLE_COPY(QTimeLine)

   139     Q_DECLARE_PRIVATE(QTimeLine)

   140 };

   141 

   142 QT_END_NAMESPACE

   143 

   144 QT_END_HEADER

   145 

   146 #endif

   147