cocos2dx 3.x 自學筆記 cocos2dx 中註冊觸摸事件touchEvent 2.x 與 3.x

轉載請註明來自_鞋男blog ：http://blog.csdn.net/wushao126/article/details/40374395

cocos2.2.5還在編譯依賴庫，還是先看3.2的吧

環境：win8 + vs2013

時間有限還是先說說這個把

#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
    #define CC_DEPRECATED_ATTRIBUTE __attribute__((deprecated))
#elif _MSC_VER >= 1400 //vs 2005 or higher
    #define CC_DEPRECATED_ATTRIBUTE __declspec(deprecated) 
#else
    #define CC_DEPRECATED_ATTRIBUTE
#endif

看不懂也沒關係，主要是提醒大家但凡函數加了

CC_DEPRECATED_ATTRIBUTE

表示廢棄了的意思，也只能在3.x中才能看到，想跟下去看看怎麼實現，水平有限，跟不了。誰知道告訴我一聲，先謝了。

但是有些函數沒有加這個修飾，但是在編譯的過程中也提示廢棄，以後再深入研究。

    CC_DEPRECATED_ATTRIBUTE virtual bool ccTouchBegan(Touch *pTouch, Event *pEvent) final {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent); return false;};
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchMoved(Touch *pTouch, Event *pEvent) final {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchEnded(Touch *pTouch, Event *pEvent) final {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchCancelled(Touch *pTouch, Event *pEvent) final {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}
    
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchesBegan(__Set *pTouches, Event *pEvent) final {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchesMoved(__Set *pTouches, Event *pEvent) final {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchesEnded(__Set *pTouches, Event *pEvent) final {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
    CC_DEPRECATED_ATTRIBUTE virtual void ccTouchesCancelled(__Set *pTouches, Event *pEvent) final {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}

被廢棄了，爲什麼被廢棄了(還是可以用吧)，下面會講的

    virtual bool onTouchBegan(Touch *touch, Event *unused_event); 
    virtual void onTouchMoved(Touch *touch, Event *unused_event); 
    virtual void onTouchEnded(Touch *touch, Event *unused_event); 
    virtual void onTouchCancelled(Touch *touch, Event *unused_event);

    virtual void onTouchesBegan(const std::vector<Touch*>& touches, Event *unused_event);
    virtual void onTouchesMoved(const std::vector<Touch*>& touches, Event *unused_event);
    virtual void onTouchesEnded(const std::vector<Touch*>& touches, Event *unused_event);
    virtual void onTouchesCancelled(const std::vector<Touch*>&touches, Event *unused_event);

註冊監聽：

    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = CC_CALLBACK_2(MainLayer::onTouchBegan, this);
    listener->onTouchEnded = CC_CALLBACK_2(MainLayer::onTouchEnded, this);
    listener->onTouchMoved = CC_CALLBACK_2(MainLayer::onTouchMove, this);//其實這裏也可以用lambda去寫
    listener->onTouchMoved = [](const std::vector<Touch*>&touches, Event *unused_event)->bool{ /* 函數體*/}
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);//默認優先級0 ，

創建listener對象，根據listenerID映射listeners容器，將listener對象存入容器中

void EventDispatcher::addEventListener(EventListener* listener)
{
    if (_inDispatch == 0)
    {
        forceAddEventListener(listener);
    }
    else
    {
        _toAddedListeners.push_back(listener);
    }

    listener->retain();
}

之後，在_nodeListenersMap中建立 node(target)與關聯的listener的映射

void EventDispatcher::associateNodeAndEventListener(Node* node, EventListener* listener)
{
    std::vector<EventListener*>* listeners = nullptr;
    auto found = _nodeListenersMap.find(node);
    if (found != _nodeListenersMap.end())
    {
        listeners = found->second;
    }
    else
    {
        listeners = new std::vector<EventListener*>();
        _nodeListenersMap.insert(std::make_pair(node, listeners));
    }
    
    listeners->push_back(listener);
}

另一個種

_eventDispatcher->addEventListenerWithFixedPriority(listener, Priority);//
我這裏發現了個問題 
void EventDispatcher::addEventListenerWithFixedPriority(EventListener* listener, int fixedPriority)
{
    CCASSERT(listener, "Invalid parameters.");
    CCASSERT(!listener->isRegistered(), "The listener has been registered.");
    CCASSERT(fixedPriority != 0, "0 priority is forbidden for fixed priority since it's used for scene graph based priority.");
    
    if (!listener->checkAvailable())
        return;
    
    listener->setAssociatedNode(nullptr);
    listener->setFixedPriority(fixedPriority);
    listener->setRegistered(true);
    listener->setPaused(false);

    addEventListener(listener);
}//我 TM的超級鬱悶 ，設置非0吧，assert了，設置〇吧，沒有node ，甭的更厲害
 //無奈之下注釋了第三行，OK了 唉只能說 被白fuck了一個小時，還能說了什麼呢

此不綁定target，所以需要手動釋放

_eventDispatcher->removeEventListener(listener），此處沒有根據nonde

第三

_eventDispatcher->addCustomEventListener("custom", [](EventCustom*)->void{ log("a event");});
EventListenerCustom* EventDispatcher::addCustomEventListener(const std::string &eventName, const std::function<void(EventCustom*)>& callback)
{
    EventListenerCustom *listener = EventListenerCustom::create(eventName, callback);//在這裏創建listener
    addEventListenerWithFixedPriority(listener, 1);
    return listener;
}

測試了下，編譯過了，但是點擊沒有反應，知道這個意思就好了以後在看了

現在看看事件分發：

glview->pollEvents();

。。。。。。//物理事件傳遞

class GLFWEventHandler
{
public:
    static void onGLFWError(int errorID, const char* errorDesc)
    {
        if (_view)
            _view->onGLFWError(errorID, errorDesc);
    }

    static void onGLFWMouseCallBack(GLFWwindow* window, int button, int action, int modify)
    {
        if (_view)
            _view->onGLFWMouseCallBack(window, button, action, modify);
    }

    static void onGLFWMouseMoveCallBack(GLFWwindow* window, double x, double y)
    {
        if (_view)
            _view->onGLFWMouseMoveCallBack(window, x, y);
    }

    static void onGLFWMouseScrollCallback(GLFWwindow* window, double x, double y)
    {
        if (_view)
            _view->onGLFWMouseScrollCallback(window, x, y);
    }

    static void onGLFWKeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
    {
        if (_view)
            _view->onGLFWKeyCallback(window, key, scancode, action, mods);
    }

    static void onGLFWCharCallback(GLFWwindow* window, unsigned int character)
    {
        if (_view)
            _view->onGLFWCharCallback(window, character);
    }

    static void onGLFWWindowPosCallback(GLFWwindow* windows, int x, int y)
    {
        if (_view)
            _view->onGLFWWindowPosCallback(windows, x, y);
    }

    static void onGLFWframebuffersize(GLFWwindow* window, int w, int h)
    {
        if (_view)
            _view->onGLFWframebuffersize(window, w, h);
    }

    static void onGLFWWindowSizeFunCallback(GLFWwindow *window, int width, int height)
    {
        if (_view)
            _view->onGLFWWindowSizeFunCallback(window, width, height);
    }

    static void setGLView(GLView* view)
    {
        _view = view;
    }

private:
    static GLView* _view;
};

我是用鼠標點的響應了鼠標的那個函數調用，根據鼠標事件調用了

void GLViewProtocol::handleTouchesEnd(int num, intptr_t ids[], float xs[], float ys[])
{
    handleTouchesOfEndOrCancel(EventTouch::EventCode::ENDED, num, ids, xs, ys);
｝

接下來纔到我們之前註冊的事件TouchEvent

void EventDispatcher::dispatchEvent(Event* event)｛

void EventDispatcher::dispatchTouchEvent(EventTouch* event){

這裏面乾的是

對事件排序，按優先級。

    auto oneByOneListeners = getListeners(EventListenerTouchOneByOne::LISTENER_ID);
    auto allAtOnceListeners = getListeners(EventListenerTouchAllAtOnce::LISTENER_ID);

得到各個TouchMode的Listeners：

    auto oneByOneListeners = getListeners(EventListenerTouchOneByOne::LISTENER_ID);
    auto allAtOnceListeners = getListeners(EventListenerTouchAllAtOnce::LISTENER_ID);

就是各種超找匹配找出是否有註冊的Event：

    if (oneByOneListeners)
    {
        auto mutableTouchesIter = mutableTouches.begin();
        auto touchesIter = originalTouches.begin();
        
        for (; touchesIter != originalTouches.end(); ++touchesIter)
        {
            bool isSwallowed = false;

            auto onTouchEvent = [&](EventListener* l) -> bool { // Return true to break
                EventListenerTouchOneByOne* listener = static_cast<EventListenerTouchOneByOne*>(l);
                
                // Skip if the listener was removed.
                if (!listener->_isRegistered)
                    return false;
             
                event->setCurrentTarget(listener->_node);
                
                bool isClaimed = false;
                std::vector<Touch*>::iterator removedIter;
                
                EventTouch::EventCode eventCode = event->getEventCode();
                
                if (eventCode == EventTouch::EventCode::BEGAN)
                {
                    if (listener->onTouchBegan)
                    {
                        isClaimed = listener->onTouchBegan(*touchesIter, event);
                        if (isClaimed && listener->_isRegistered)
                        {
                            listener->_claimedTouches.push_back(*touchesIter);
                        }
                    }
                }
                else if (listener->_claimedTouches.size() > 0
                         && ((removedIter = std::find(listener->_claimedTouches.begin(), listener->_claimedTouches.end(), *touchesIter)) != listener->_claimedTouches.end()))
                {
                    isClaimed = true;
                    
                    switch (eventCode)
                    {
                        case EventTouch::EventCode::MOVED:
                            if (listener->onTouchMoved)
                            {
                                listener->onTouchMoved(*touchesIter, event);
                            }
                            break;
                        case EventTouch::EventCode::ENDED:
                            if (listener->onTouchEnded)
                            {
                                listener->onTouchEnded(*touchesIter, event);
                            }
                            if (listener->_isRegistered)
                            {
                                listener->_claimedTouches.erase(removedIter);
                            }
                            break;
                        case EventTouch::EventCode::CANCELLED:
                            if (listener->onTouchCancelled)
                            {
                                listener->onTouchCancelled(*touchesIter, event);
                            }
                            if (listener->_isRegistered)
                            {
                                listener->_claimedTouches.erase(removedIter);
                            }
                            break;
                        default:
                            CCASSERT(false, "The eventcode is invalid.");
                            break;
                    }
                }
                
                // If the event was stopped, return directly.
                if (event->isStopped())
                {
                    updateListeners(event);
                    return true;
                }
                
                CCASSERT((*touchesIter)->getID() == (*mutableTouchesIter)->getID(), "");
                
                if (isClaimed && listener->_isRegistered && listener->_needSwallow)
                {
                    if (isNeedsMutableSet)
                    {
                        mutableTouchesIter = mutableTouches.erase(mutableTouchesIter);
                        isSwallowed = true;
                    }
                    return true;
                }
                
                return false;
            };
            
            //
            dispatchEventToListeners(oneByOneListeners, onTouchEvent);//主要在這裏 這裏用了lambda，執行循序要搞清楚了
            if (event->isStopped())
            {
                return;
            }
            
            if (!isSwallowed)
                ++mutableTouchesIter;
        }
    }

void EventDispatcher::dispatchEventToListeners(EventListenerVector* listeners, const std::function<bool(EventListener*)>& onEvent)

這個函數告訴我們了若匹配到了不想下分發了

然後進入那個lambda函數裏執行註冊過的touch系列函數了。執行完了還會在下一個循環刪除這一事件

現在講講ccs 2.2.x ，一直在發佈新版本，ccs現在完善了不少，我們就拿最新的來將好了，ccs 3.0x之前的版本大家都熟悉了，不熟悉，網上教程一大把，我這裏略微補充下

類：CCTouchDispatcher

void CCTouchDispatcher::addStandardDelegate(CCTouchDelegate *pDelegate, int nPriority)
{    
    CCTouchHandler *pHandler = CCStandardTouchHandler::handlerWithDelegate(pDelegate, nPriority);
    if (! m_bLocked)
    {
        forceAddHandler(pHandler, m_pStandardHandlers);
    }
    else
    {
        /* If pHandler is contained in m_pHandlersToRemove, if so remove it from m_pHandlersToRemove and return.
         * Refer issue #752(cocos2d-x)
         */
        if (ccCArrayContainsValue(m_pHandlersToRemove, pDelegate))
        {
            ccCArrayRemoveValue(m_pHandlersToRemove, pDelegate);
            return;
        }

        m_pHandlersToAdd->addObject(pHandler);
        m_bToAdd = true;
    }
}

我們經常重寫void CCLayer::registerWithTouchDispatcher()，然後調用上面的註冊函數，

void CCLayer::registerWithTouchDispatcher()
{
    CCTouchDispatcher* pDispatcher = CCDirector::sharedDirector()->getTouchDispatcher();

    // Using LuaBindings
    if (m_pScriptTouchHandlerEntry)
    {
	    if (m_pScriptTouchHandlerEntry->isMultiTouches())
	    {
	       pDispatcher->addStandardDelegate(this, 0);
	       LUALOG("[LUA] Add multi-touches event handler: %d", m_pScriptTouchHandlerEntry->getHandler());
	    }
	    else
	    {
	       pDispatcher->addTargetedDelegate(this,
						m_pScriptTouchHandlerEntry->getPriority(),
						m_pScriptTouchHandlerEntry->getSwallowsTouches());
	       LUALOG("[LUA] Add touch event handler: %d", m_pScriptTouchHandlerEntry->getHandler());
	    }
    }
    else
    {
        if( m_eTouchMode == kCCTouchesAllAtOnce ) {
            pDispatcher->addStandardDelegate(this, 0);
        } else {
            pDispatcher->addTargetedDelegate(this, m_nTouchPriority, true);
        }
    }
}

從上面代碼可以看出如果我們改變m_eTouchMode就可以修改註冊模式，完成這個使命的函數CCLayer::setTouchMode( ... )

但是一定要注意調用的順序，我們都知道在layer切換的時候先是init(),然後onEnter(),onEnterTransitionDidFinish()

在CCDirect類中有這樣的一代碼可以看出

        m_pRunningScene->onEnter();
        m_pRunningScene->onEnterTransitionDidFinish();

我們都知道registerWithTouchDispatch()是在CCLayer的onEnter裏面調用，我們只需init()或者重寫onEnter(){ setTouchMode(...) ,CCLayer::onEnter();}，OK！

還有一點：

void CCTouchDispatcher::addStandardDelegate(CCTouchDelegate *pDelegate, int nPriority)
{    
    CCTouchHandler *pHandler = CCStandardTouchHandler::handlerWithDelegate(pDelegate, nPriority);
    if (! m_bLocked)
    {
        forceAddHandler(pHandler, m_pStandardHandlers);
    }
    else
    {
        /* If pHandler is contained in m_pHandlersToRemove, if so remove it from m_pHandlersToRemove and return.
         * Refer issue #752(cocos2d-x)
         */
        if (ccCArrayContainsValue(m_pHandlersToRemove, pDelegate))
        {
            ccCArrayRemoveValue(m_pHandlersToRemove, pDelegate);
            return;
        }

        m_pHandlersToAdd->addObject(pHandler);
        m_bToAdd = true;
    }
}

從參數類型看，

class CC_DLL CCTouchDelegate
{
public:

    CCTouchDelegate() {}

    virtual ~CCTouchDelegate()
    {
    }

    virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent); return false;};
    // optional

    virtual void ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}
    virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}
    virtual void ccTouchCancelled(CCTouch *pTouch, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouch); CC_UNUSED_PARAM(pEvent);}

    // optional
     virtual void ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
     virtual void ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
     virtual void ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}
     virtual void ccTouchesCancelled(CCSet *pTouches, CCEvent *pEvent) {CC_UNUSED_PARAM(pTouches); CC_UNUSED_PARAM(pEvent);}

};

我們已經知道他們想幹什麼事情了。

protected:
     CCArray* m_pTargetedHandlers;
     CCArray* m_pStandardHandlers;

    bool m_bLocked;
...
     CCArray* m_pHandlersToAdd;
    struct _ccCArray *m_pHandlersToRemove;
...

從CCTouchDispatcher的數據結構來看，主要是兩個容器CCArray* m_pTargetedHandlers; CCArray* m_pStandardHandlers; m_bLocked

m_pHandlersToAdd;m_pHandlersToRemove主要是同步安全機制

註冊好了就是分發了，主要算法都在 CCTouchDispatcher::touches(cocos2d::CCSet * pTouches, cocos2d::CCEvent * pEvent, unsigned int uIndex) ，分類處理

            switch (sHelper.m_type)
            {
            case CCTOUCHBEGAN:
                pHandler->getDelegate()->ccTouchesBegan(pMutableTouches, pEvent);
                break;
            case CCTOUCHMOVED:
                pHandler->getDelegate()->ccTouchesMoved(pMutableTouches, pEvent);
                break;
            case CCTOUCHENDED:
                pHandler->getDelegate()->ccTouchesEnded(pMutableTouches, pEvent);
                break;
            case CCTOUCHCANCELLED:
                pHandler->getDelegate()->ccTouchesCancelled(pMutableTouches, pEvent);
                break;
            }

暫時就寫到這了，若有錯誤，還請留言指出，謝謝

cocos2dx 3.x 自學筆記 cocos2dx 中註冊觸摸事件touchEvent 2.x 與 3.x

杭州的 IT 崩盤了麼？

VS2022 解決方案打不開 .NET Framework 4.0 、 4.5 等老項目

Vue3 運行可以，build 打包發佈報錯，app.config.globalProperties 用法坑

cocos2dx lua學習筆記 quick 3.5把自定義C++類綁定到lua

cocos2dx 自學筆記瓦片地圖 Tiled Map 學習

在windows上設置分辨率上的一些坑

cocos2dx 3.x 自學筆記 cocos2dx 2.x 3.x 內存管理機制

cocos2dx 3.x 自學筆記 cocos2dx 中註冊觸摸事件touchEvent 2.x 與 3.x

Mac下配置sublime實現LaTeX

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結