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);
}