cocos2d-x CCMenu详细源码分析

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.h

typedef enum 
{
    kCCMenuStateWaiting,// 表示没有菜单项被选中
    kCCMenuStateTrackingTouch // 表示有菜单项被选中
} tCCMenuState;
 
enum {
    //* priority used by the menu for the event handler
    kCCMenuHandlerPriority = -128,};
 
class CC_DLL CCMenu : public CCLayerRGBA // CCMenu的基类居然是CCLayer！
{
    bool m_bEnabled; // CCMenu是否接收触摸事件
     
public:
    CCMenu() : m_pSelectedItem(NULL) {}
    virtual ~CCMenu(){}
 
    // 创建一个空菜单
    static CCMenu* create();
 
    // 根据多个菜单项列创建菜单
    static CCMenu* create(CCMenuItem* item,...);
 
    // 通过子菜单项的数组创建菜单
    static CCMenu* createWithArray(CCArray* pArrayOfItems);
 
    // 通过一个菜单项创建菜单
    static CCMenu* createWithItem(CCMenuItem* item);
     
    // 通过多个菜单项列创建菜单
    static CCMenu* createWithItems(CCMenuItem *firstItem,va_list args);
 
    // 初始化空菜单
    bool init();
 
    // 通过子菜单项数组初始化菜单
    bool initWithArray(CCArray* pArrayOfItems);
 
    // 垂直方向默认间隙排列
    void alignItemsVertically();
    //垂直方向指定间隙排列
    void alignItemsVerticallyWithPadding(float padding);
 
    // 水平方向默认间隙排列
    void alignItemsHorizontally();
    // 水平方向指定间隙排列
    void alignItemsHorizontallyWithPadding(float padding);
 
    // 通过每行个数排列
    void alignItemsInColumns(unsigned int columns,...);
    void alignItemsInColumns(unsigned int columns,va_list args);
    // ?
    void alignItemsInColumnsWithArray(CCArray* rows);
 
    // 通过每列个数排列
    void alignItemsInRows(unsigned int rows,...);
    void alignItemsInRows(unsigned int rows,va_list args);
    // ?
    void alignItemsInRowsWithArray(CCArray* columns);
 
    // 设置事件处理优先级，默认为kCCMenuTouchPriority
    void setHandlerPriority(int newPriority);
 
    // 基类方法
    virtual void addChild(CCNode * child);
    virtual void addChild(CCNode * child,int zOrder);
    virtual void addChild(CCNode * child,int zOrder,int tag);
    virtual void registerWithTouchDispatcher();
    virtual void removeChild(CCNode* child,bool cleanup);
 
    // 触摸事件
    virtual bool ccTouchBegan(CCTouch* touch,CCEvent* event);
    virtual void ccTouchEnded(CCTouch* touch,CCEvent* event);
    virtual void ccTouchCancelled(CCTouch *touch,CCEvent* event);
    virtual void ccTouchMoved(CCTouch* touch,CCEvent* event);
 
    // 退出调用函数
    virtual void onExit();
 
    // ？
    virtual void setOpacityModifyRGB(bool bValue) {CC_UNUSED_PARAM(bValue);}
    virtual bool isOpacityModifyRGB(void) { return false;}
    // 获取/设置菜单是否可用
    virtual bool isEnabled() { return m_bEnabled; }
    virtual void setEnabled(bool value) { m_bEnabled = value; };
 
protected:
    // 返回被触摸的菜单项
    CCMenuItem* itemForTouch(CCTouch * touch);
    tCCMenuState m_eState;
    CCMenuItem *m_pSelectedItem;
};
 


 
 


 
 

.cpp 
 


 
 
 

static std::vector<unsigned int=""> ccarray_to_std_vector(CCArray* pArray) // 将CCArray转换成Vector
{
    std::vector<unsigned int=""> ret;
    CCObject* pObj;
    CCARRAY_FOREACH(pArray,pObj)
    {
        CCInteger* pInteger = (CCInteger*)pObj;
        ret.push_back((unsigned int)pInteger->getValue());
    }
    return ret;
}
 
enum
{
    kDefaultPadding =  5,};
 
//
//CCMenu
//
 
CCMenu* CCMenu::create()
{ // 传空参数，创建空菜单
    return CCMenu::create(NULL,NULL);
}
 
CCMenu * CCMenu::create(CCMenuItem* item,...)
{
    va_list args;
    va_start(args,item); //处理...形参
     
    CCMenu *pRet = CCMenu::createWithItems(item,args);
     
    va_end(args);
     
    return pRet;
}
 
CCMenu* CCMenu::createWithArray(CCArray* pArrayOfItems)
{
    CCMenu *pRet = new CCMenu();
    if (pRet && pRet->initWithArray(pArrayOfItems))
    {
        pRet->autorelease(); // 设置自动释放
    }
    else
    {
        CC_SAFE_DELETE(pRet);
    }
     
    return pRet;
}
 
CCMenu* CCMenu::createWithItems(CCMenuItem* item,va_list args)
{
    CCArray* pArray = NULL; // 将...形参转换成CCArray
    if( item )
    {
        pArray = CCArray::create(item,NULL); // 创建一个CCArray
        CCMenuItem *i = va_arg(args,CCMenuItem*);
        while(i)
        {
            pArray->addObject(i); // 添加其他子菜单项
            i = va_arg(args,CCMenuItem*);
        }
    }
     
    return CCMenu::createWithArray(pArray);
}
 
CCMenu* CCMenu::createWithItem(CCMenuItem* item)
{
    return CCMenu::create(item,NULL);
}
 
bool CCMenu::init()
{
    return initWithArray(NULL);
}
 
bool CCMenu::initWithArray(CCArray* pArrayOfItems)
{
    if (CCLayer::init())
    {
        // 设置触摸相关信息
        setTouchPriority(kCCMenuHandlerPriority);
        setTouchMode(kCCTouchesOneByOne);
        setTouchEnabled(true);
 
        // 打开可用状态
        m_bEnabled = true;
         
        // 菜单置于屏幕中间，并填充满整个屏幕
        CCSize s = CCDirector::sharedDirector()->getWinSize();
        this->ignoreAnchorPointForPosition(true);
        setAnchorPoint(ccp(0.5f,0.5f));
        this->setContentSize(s);
        setPosition(ccp(s.width/2,s.height/2));
         
        // 遍历添加菜单项
        if (pArrayOfItems != NULL)
        {
            int z=0;
            CCObject* pObj = NULL;
            CCARRAY_FOREACH(pArrayOfItems,pObj)
            {
                CCMenuItem* item = (CCMenuItem*)pObj;
                this->addChild(item,z);
                z++;
            }
        }
     
        // 将选中项置为空
        m_pSelectedItem = NULL;
        // 将状态置为没有菜单项被选中
        m_eState = kCCMenuStateWaiting;
         
        // enable cascade color and opacity on menus
        setCascadeColorEnabled(true);
        setCascadeOpacityEnabled(true);
         
        return true;
    }
    return false;
}
 
/*
* override add:
*/
void CCMenu::addChild(CCNode * child)
{
    CCLayer::addChild(child);
}
 
void CCMenu::addChild(CCNode * child,int zOrder)
{
    CCLayer::addChild(child,zOrder);
}
 
void CCMenu::addChild(CCNode * child,int tag)
{ // 确保child为CCMenuItem之内
    CCAssert( dynamic_cast<ccmenuitem*>(child) != NULL,Menu only supports MenuItem objects as children);
    CCLayer::addChild(child,zOrder,tag);
}
 
void CCMenu::onExit()
{
    if (m_eState == kCCMenuStateTrackingTouch) // 如果有菜单项被选中，则取消选择状态
    {
        if (m_pSelectedItem)
        { // 将选中项菜单选中状态清除，并将用于记录的变量置为空
            m_pSelectedItem->unselected();
            m_pSelectedItem = NULL;
        }
        // 将状态置为等待触摸
        m_eState = kCCMenuStateWaiting;
    }
 
    CCLayer::onExit();
}
 
void CCMenu::removeChild(CCNode* child,bool cleanup)
{
    CCMenuItem *pMenuItem = dynamic_cast<ccmenuitem*>(child);
    CCAssert(pMenuItem != NULL,Menu only supports MenuItem objects as children);
     
    // 如果是被选中的菜单项，则先把选中置为空
    if (m_pSelectedItem == pMenuItem)
    {
        m_pSelectedItem = NULL;
    }
     
    CCNode::removeChild(child,cleanup);
}
 
//Menu - Events
 
void CCMenu::setHandlerPriority(int newPriority)
{
    CCTouchDispatcher* pDispatcher = CCDirector::sharedDirector()->getTouchDispatcher();
    pDispatcher->setPriority(newPriority,this); // 设置触摸优先级
}
 
void CCMenu::registerWithTouchDispatcher()
{ // 注册触摸
    CCDirector* pDirector = CCDirector::sharedDirector();
    pDirector->getTouchDispatcher()->addTargetedDelegate(this,this->getTouchPriority(),true);
}
 
bool CCMenu::ccTouchBegan(CCTouch* touch,CCEvent* event)
{
    CC_UNUSED_PARAM(event);
    if (m_eState != kCCMenuStateWaiting || ! m_bVisible || !m_bEnabled)
    { // 排除不执行触摸事件状态
        return false;
    }
 
    for (CCNode *c = this->m_pParent; c != NULL; c = c->getParent())
    { // 如果菜单父类不可见则返回
        if (c->isVisible() == false)
        {
            return false;
        }
    }
<span style="white-space: pre;">    </span>// 选出触摸项
    m_pSelectedItem = this->itemForTouch(touch);
    if (m_pSelectedItem)
    {
        m_eState = kCCMenuStateTrackingTouch; // 将状态变为有菜单项被选中
        m_pSelectedItem->selected(); // 对触摸项执行触摸事件
        return true;
    }
    return false;
}
 
void CCMenu::ccTouchEnded(CCTouch *touch,CCEvent* event)
{
    CC_UNUSED_PARAM(touch); // 消除不使用警告
    CC_UNUSED_PARAM(event);
    CCAssert(m_eState == kCCMenuStateTrackingTouch,[Menu ccTouchEnded] -- invalid state);
    if (m_pSelectedItem)
    { // 解除菜单项选中状态
        m_pSelectedItem->unselected();
        m_pSelectedItem->activate();
    }
    m_eState = kCCMenuStateWaiting;
}
 
void CCMenu::ccTouchCancelled(CCTouch *touch,CCEvent* event)
{
    CC_UNUSED_PARAM(touch);
    CC_UNUSED_PARAM(event);
    CCAssert(m_eState == kCCMenuStateTrackingTouch,[Menu ccTouchCancelled] -- invalid state);
    if (m_pSelectedItem)
    { // 解除菜单项选中状态
        m_pSelectedItem->unselected();
    }
    m_eState = kCCMenuStateWaiting;
}
 
void CCMenu::ccTouchMoved(CCTouch* touch,CCEvent* event)
{
    CC_UNUSED_PARAM(event);
    CCAssert(m_eState == kCCMenuStateTrackingTouch,[Menu ccTouchMoved] -- invalid state);
    CCMenuItem *currentItem = this->itemForTouch(touch); // 获取当前触摸的子菜单项
    if (currentItem != m_pSelectedItem) 
    {
        if (m_pSelectedItem) // 如果当前有选中项，先取消选中
        {
            m_pSelectedItem->unselected();
        }
        m_pSelectedItem = currentItem; // 重新设置选中项
        if (m_pSelectedItem)
        {
            m_pSelectedItem->selected();
        }
    }
}
 
//Menu - Alignment
// 垂直方向默认间隙排列
void CCMenu::alignItemsVertically()
{
    this->alignItemsVerticallyWithPadding(kDefaultPadding);
}
 
// 垂直方向指定间隙排列
void CCMenu::alignItemsVerticallyWithPadding(float padding)
{
    float height = -padding;  // 第一个子菜单没有间隔，用于去掉这个重复
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode*>(pObject);
            if (pChild)
            {
                height += pChild->getContentSize().height * pChild->getScaleY() + padding; // 获取子菜单项和间隔的总高度
            }
        }
    }
 
    float y = height / 2.0f; // 因为定位点在中间，所以先除去2
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode*>(pObject);
            if (pChild)
            {
                pChild->setPosition(ccp(0,y - pChild->getContentSize().height * pChild->getScaleY() / 2.0f)); // 锚点在中间，所以除2
                y -= pChild->getContentSize().height * pChild->getScaleY() + padding; // 减去一个子菜单项和间隔的高度
            }
        }
    }
}
 
// 水平方向默认间隙排列
void CCMenu::alignItemsHorizontally(void)
{
    this->alignItemsHorizontallyWithPadding(kDefaultPadding);
}
 
// 水平方向指定间隙排列
void CCMenu::alignItemsHorizontallyWithPadding(float padding) // 原理和垂直排列相似，只不过将x变成y
{
 
    float width = -padding;
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode*>(pObject);
            if (pChild)
            {
                width += pChild->getContentSize().width * pChild->getScaleX() + padding;
            }
        }
    }
 
    float x = -width / 2.0f;
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode*>(pObject);
            if (pChild)
            {
                pChild->setPosition(ccp(x + pChild->getContentSize().width * pChild->getScaleX() / 2.0f,0));
                 x += pChild->getContentSize().width * pChild->getScaleX() + padding;
            }
        }
    }
}
 
void CCMenu::alignItemsInColumns(unsigned int columns,...)
{ // 将...转换成va_list
    va_list args;
    va_start(args,columns);
 
    this->alignItemsInColumns(columns,args);
 
    va_end(args);
}
 
void CCMenu::alignItemsInColumns(unsigned int columns,va_list args)
{ // 将va_list转换成CCArray
    CCArray* rows = CCArray::create();
    while (columns)
    {
        rows->addObject(CCInteger::create(columns));
        columns = va_arg(args,unsigned int);
    }
    alignItemsInColumnsWithArray(rows);
}
 
void CCMenu::alignItemsInColumnsWithArray(CCArray* rowsArray)
{
    vector<unsigned int=""> rows = ccarray_to_std_vector(rowsArray); // 将CCArray转换成vector
 
    int height = -5; // 为-5是用于除去第一行的间隙
    unsigned int row = 0; // 索引，当前行序号
    unsigned int rowHeight = 0; // 放置每一行高度（即每行最大高度）
    unsigned int columnsOccupied = 0; // 已放置列数
    unsigned int rowColumns; // 放置该行有多少列
 
    if (m_pChildren && m_pChildren->count() > 0) // 子菜单项数组存在且个数不为0
    {
        CCObject* pObject = NULL; // 临时变量
        CCARRAY_FOREACH(m_pChildren,pObject) // 遍历子菜单项数组
        {
            CCNode* pChild = dynamic_cast<ccnode*>(pObject); // 将CCObject对象强制转换成CCNode对象
            if (pChild) // 如果强制转换成功
            {
                CCAssert(row < rows.size(),);
 
                rowColumns = rows[row]; // 获取该行列数
                CCAssert(rowColumns,);
 
                float tmp = pChild->getContentSize().height; // 获取当前子菜单高度
                rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp); // 如果行高大于当前子菜单项高度，或者当前子菜单项高度越界，rowHeight不变，否则rowHeight等于当前子菜单项高度（用来存放最大菜单项高度）
 
                ++columnsOccupied; // 已放置列数自加
                if (columnsOccupied >= rowColumns) // 如果已放置列数大于等于该行可容纳列数
                {
                    height += rowHeight + 5; // 高度加上当前高度加上间隙
                    columnsOccupied = 0; // 重置已放置列数
                    rowHeight = 0; // 重置每行行高的临时变量
                    ++row; // 跳转至下一行
                }
            }
        }
    }    
 
    // check if too many rows/columns for available menu items
    CCAssert(! columnsOccupied,);
 
    CCSize winSize = CCDirector::sharedDirector()->getWinSize(); // 获取屏幕大小
 
    row = 0;
    rowHeight = 0;
    rowColumns = 0;
    float w = 0.0;
    float x = 0.0;
    float y = (float)(height / 2);
 
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode>(pObject);
            if (pChild)
            {
                if (rowColumns == 0) // 如果需要放置数量为0才重新读取数据
                {
                    rowColumns = rows[row]; // 获取需要放置的数量
                    w = winSize.width / (1 + rowColumns); //占屏幕宽度大小平分
                    x = w;
                }
 
                float tmp = pChild->getContentSize().height;
                rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp); // 获取当前行高度最大高度
                pChild->setPosition(ccp(x - winSize.width / 2,y - pChild->getContentSize().height / 2)); // 重新放置位置
 
                x += w;
                ++columnsOccupied;
 
                if (columnsOccupied >= rowColumns) // 如果已放置列数大于等于需要放置的列数
                {
                    y -= rowHeight + 5; // 减去一个子菜单项和间隔的高度
 
                    columnsOccupied = 0;
                    rowColumns = 0;
                    rowHeight = 0;
                    ++row;
                }
            }
        }
    }    
}
 
//alignItemsInRows系列方法参照alignItemsInColumns
void CCMenu::alignItemsInRows(unsigned int rows,rows);
 
    this->alignItemsInRows(rows,args);
 
    va_end(args);
}
 
void CCMenu::alignItemsInRows(unsigned int rows,va_list args)
{
    CCArray* pArray = CCArray::create();
    while (rows)
    {
        pArray->addObject(CCInteger::create(rows));
        rows = va_arg(args,unsigned int);
    }
    alignItemsInRowsWithArray(pArray);
}
 
void CCMenu::alignItemsInRowsWithArray(CCArray* columnArray)
{
    vector<unsigned int=""> columns = ccarray_to_std_vector(columnArray);
 
    vector<unsigned int=""> columnWidths;
    vector<unsigned int=""> columnHeights;
 
    int width = -10;
    int columnHeight = -5;
    unsigned int column = 0;
    unsigned int columnWidth = 0;
    unsigned int rowsOccupied = 0;
    unsigned int columnRows;
 
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode>(pObject);
            if (pChild)
            {
                // check if too many menu items for the amount of rows/columns
                CCAssert(column < columns.size(),);
 
                columnRows = columns[column];
                // can't have zero rows on a column
                CCAssert(columnRows,);
 
                // columnWidth = fmaxf(columnWidth,[item contentSize].width);
                float tmp = pChild->getContentSize().width;
                columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);
 
                columnHeight += (int)(pChild->getContentSize().height + 5);
                ++rowsOccupied;
 
                if (rowsOccupied >= columnRows)
                {
                    columnWidths.push_back(columnWidth);
                    columnHeights.push_back(columnHeight);
                    width += columnWidth + 10;
 
                    rowsOccupied = 0;
                    columnWidth = 0;
                    columnHeight = -5;
                    ++column;
                }
            }
        }
    }
 
    // check if too many rows/columns for available menu items.
    CCAssert(! rowsOccupied,);
 
    CCSize winSize = CCDirector::sharedDirector()->getWinSize();
 
    column = 0;
    columnWidth = 0;
    columnRows = 0;
    float x = (float)(-width / 2);
    float y = 0.0;
 
    if (m_pChildren && m_pChildren->count() > 0)
    {
        CCObject* pObject = NULL;
        CCARRAY_FOREACH(m_pChildren,pObject)
        {
            CCNode* pChild = dynamic_cast<ccnode>(pObject);
            if (pChild)
            {
                if (columnRows == 0)
                {
                    columnRows = columns[column];
                    y = (float) columnHeights[column];
                }
 
                // columnWidth = fmaxf(columnWidth,[item contentSize].width);
                float tmp = pChild->getContentSize().width;
                columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);
 
                pChild->setPosition(ccp(x + columnWidths[column] / 2,y - winSize.height / 2));
 
                y -= pChild->getContentSize().height + 10;
                ++rowsOccupied;
 
                if (rowsOccupied >= columnRows)
                {
                    x += columnWidth + 5;
                    rowsOccupied = 0;
                    columnRows = 0;
                    columnWidth = 0;
                    ++column;
                }
            }
        }
    }
}
 
CCMenuItem* CCMenu::itemForTouch(CCTouch *touch){
    CCPoint touchLocation = touch->getLocation(); // 获取当前触摸点
    if (m_pChildren && m_pChildren->count() > 0) // 判断子节点（子菜单项）是否存在，且个数不为0
    {
        CCObject* pObject = NULL; // 临时变量
        CCARRAY_FOREACH(m_pChildren,pObject) // 遍历子菜单项数组
        {
            CCMenuItem* pChild = dynamic_cast<ccmenuitem>(pObject); // 强制转换，获取当前子菜单项
            if (pChild && pChild->isVisible() && pChild->isEnabled()) // 如果当前子菜单项不为空、且可见、且可用
            {
                CCPoint local = pChild->convertToNodeSpace(touchLocation); // 把世界坐标转换到当前节点的本地坐标系中
                CCRect r = pChild->rect(); // 获取子菜单项范围
                r.origin = CCPointZero;
                if (r.containsPoint(local)) // 判断子菜单项范围中是否包括触摸点
                {
                    return pChild; // 返回该子菜单项
                }
            }
        }
    }
    return NULL; // 返回空
}

 

 
 


 
 

看懂了。就是知识

      

      
                 
              

            

          

          
          
          

            

              




            

          


          

            

              

                  
    
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公共资源加载，缓存retain；防止被自动销毁 2. 数字滚动递增；用于得奖后，总金币跳动增加...

                                
                                
                            



                                    
cocos creator box2d

                                
title Map 使用box2d var sfloors = this.tiledMap.getObjectGroup(‘Special_Floor‘).g...

                                
                                
                            



                                    
（转）让quick-cocos2d-x支持加密的plist文件

                                
前篇：quick-cocos2d-x图片资源加密 在前篇里面，我们实现了图片资源的加密，但还没有实现...

                                
                                
                            



                                    
（转）quick-cocos2d-x图片资源加密(续)

                                
摘要: 对在quick-cocos2d-x上实现的资源加密方法的补充 前篇： quick-cocos2d-x图片资源加...

                                
                                
                            



                                    
Cocos Creator 动态改变sprite图片

                                
首先将存放图片最外层文件夹命名为resources 　　 changeBj: function(){ 　　　　var url...

                                
                                
                            







            

          

        

        
        
        
        

          
          

            

              

                
                
iOSAndroidSwiftHybridCocos2d-xFlutterXcodeSilverlightcocoaCordova

                

              

            

          

          
         
          

            

              
 



              

            

          

          
          
          
          

            

              

                
                
              

            

          

          


          
          

            

              

                
                
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