cocos2d-x笔记 ccTouchesBegan、ccTouchesMoved、ccTouchesEnded

#ifndef __MUTITOUCHTEST_H__
#define __MUTITOUCHTEST_H__

#include "../testBasic.h"

class MutiTouchTestLayer : public CCLayer
{
public:
    bool init();

    virtual void registerWithTouchDispatcher(void);
    virtual void ccTouchesBegan(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);
    virtual void ccTouchesMoved(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);
    virtual void ccTouchesEnded(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);
    virtual void ccTouchesCancelled(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);

    CREATE_FUNC(MutiTouchTestLayer)
};

class MutiTouchTestScene : public TestScene
{
 public:
  virtual void runThisTest();
};

#endif /* __MUTITOUCHTEST_H__ */

//定义颜色数组
static ccColor3B s_TouchColors[CC_MAX_TOUCHES] = {
    ccYELLOW,
    ccBLUE,
    ccGREEN,
    ccRED,
    ccMAGENTA
};

//定义点类
class TouchPoint : public CCNode
{
public:
    TouchPoint()
    {
        setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor));
    }

    virtual void draw()
    {
        ccDrawColor4B(m_TouchColor.r, m_TouchColor.g, m_TouchColor.b, 255);
        glLineWidth(10);
        ccDrawLine( ccp(0, m_pTouchPoint.y), ccp(getContentSize().width, m_pTouchPoint.y) );
        ccDrawLine( ccp(m_pTouchPoint.x, 0), ccp(m_pTouchPoint.x, getContentSize().height) );
        glLineWidth(1);
        ccPointSize(30);
        ccDrawPoint(m_pTouchPoint);
    }

    void setTouchPos(const CCPoint& pt)
    {
        m_pTouchPoint = pt;
    }

    void setTouchColor(ccColor3B color)
    {
        m_TouchColor = color;
    }

    static TouchPoint* touchPointWithParent(CCNode* pParent)
    {
        TouchPoint* pRet = new TouchPoint();
        pRet->setContentSize(pParent->getContentSize());
        pRet->setAnchorPoint(ccp(0.0f, 0.0f));
        pRet->autorelease();
        return pRet;
    }

private:
    CCPoint m_pTouchPoint;
    ccColor3B m_TouchColor;
};

//开启多点触控
bool MutiTouchTestLayer::init()
{
    if (CCLayer::init())
    {
        setTouchEnabled(true);
        return true;
    }
    return false;
}
//定义字典，用于管理点集
static CCDictionary s_dic;

//注册标准触摸事件
void MutiTouchTestLayer::registerWithTouchDispatcher(void)
{
    CCDirector::sharedDirector()->getTouchDispatcher()->addStandardDelegate(this, 0);
}

void MutiTouchTestLayer::ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent)
{
    CCSetIterator iter = pTouches->begin();
    for (; iter != pTouches->end(); iter++)
    {
        CCTouch* pTouch = (CCTouch*)(*iter);
        TouchPoint* pTouchPoint = TouchPoint::touchPointWithParent(this);
        CCPoint location = pTouch->getLocation();

        pTouchPoint->setTouchPos(location);
        pTouchPoint->setTouchColor(s_TouchColors[pTouch->getID()]);

        addChild(pTouchPoint);
//将点对象及其id加到字典中
        s_dic.setObject(pTouchPoint, pTouch->getID());
    }
    

}

void MutiTouchTestLayer::ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent)
{
    CCSetIterator iter = pTouches->begin();
    for (; iter != pTouches->end(); iter++)
    {
        CCTouch* pTouch = (CCTouch*)(*iter);
//通过id从字典中找出相应的点对象
        TouchPoint* pTP = (TouchPoint*)s_dic.objectForKey(pTouch->getID());
        CCPoint location = pTouch->getLocation();
//然后赋值进去
        pTP->setTouchPos(location);
    }
}

//清除点集
void MutiTouchTestLayer::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent)
{
    CCSetIterator iter = pTouches->begin();
    for (; iter != pTouches->end(); iter++)
    {
        CCTouch* pTouch = (CCTouch*)(*iter);
        TouchPoint* pTP = (TouchPoint*)s_dic.objectForKey(pTouch->getID());
        removeChild(pTP, true);
        s_dic.removeObjectForKey(pTouch->getID());
    }
}

//结束
void MutiTouchTestLayer::ccTouchesCancelled(CCSet *pTouches, CCEvent *pEvent)
{
    ccTouchesEnded(pTouches, pEvent);
}

void MutiTouchTestScene::runThisTest()
{
    MutiTouchTestLayer* pLayer = MutiTouchTestLayer::create();

    addChild(pLayer, 0);

    CCDirector::sharedDirector()->replaceScene(this);
}