CCActionProgressTimer（进度条动作）

需要先看CCProgressTimer.h

#ifndef __ACTION_CCPROGRESS_TIMER_H__

#define __ACTION_CCPROGRESS_TIMER_H__

#include "CCActionInterval.h"

NS_CC_BEGIN

/**

@brief Progress to percentage

@since v0.99.1

*/

class CC_DLL CCProgressTo : public CCActionInterval

{

public:

    /** Initializes with a duration and a percent */

    bool initWithDuration(float duration, float fPercent); //动作时间，显示百分比  

    virtual CCObject* copyWithZone(CCZone *pZone);

    virtual void startWithTarget(CCNode *pTarget);

///////

void CCProgressTo::startWithTarget(CCNode *pTarget)

{

    CCActionInterval::startWithTarget(pTarget);

    m_fFrom = ((kProgressTimerCast)(pTarget))->getPercentage();

    // XXX: Is this correct ?

    // Adding it to support CCRepeat

    if (m_fFrom == 100)

    {

        m_fFrom = 0;

    }

}

///////

    virtual void update(float time);

//////

void CCProgressTo::update(float time)

{

    ((kProgressTimerCast)(m_pTarget))->setPercentage(m_fFrom + (m_fTo - m_fFrom) * time);

//#define kProgressTimerCast CCProgressTimer*   // CCProgressTimer见CCProgressTimer.h

}

///////

public:

    /** Creates and initializes with a duration and a percent */

    static CCProgressTo* create(float duration, float fPercent);

protected:

    float m_fTo;

    float m_fFrom; //默认 不可设置

};

/**

@brief Progress from a percentage to another percentage

@since v0.99.1

*/

class CC_DLL CCProgressFromTo : public CCActionInterval  //可以设置from 和 to 百分比

{

public:

    /** Initializes the action with a duration, a "from" percentage and a "to" percentage */

    bool initWithDuration(float duration, float fFromPercentage, float fToPercentage);

    virtual CCObject* copyWithZone(CCZone *pZone);

    virtual CCActionInterval* reverse(void);

    virtual void startWithTarget(CCNode *pTarget);

    virtual void update(float time);

public:

    /** Creates and initializes the action with a duration, a "from" percentage and a "to" percentage */

    static CCProgressFromTo* create(float duration, float fFromPercentage, float fToPercentage);

protected:

    float m_fTo;

    float m_fFrom;

};

// end of actions group

/// @}

NS_CC_END

#endif // __ACTION_CCPROGRESS_TIMER_H__