• CCMenuItemより先にCCScrollViewがタッチイベントを取得するようにする


• ccTouchEnded時にタッチの移動距離を計算し、一定以下ならCCMenuにタッチイベントを渡す


• CCMenu側では指定された範囲外だったら無視する

.h

class CCMenuEx : public cocos2d::CCMenu {
public:
    CREATE_FUNC(CCMenuEx);
    virtual bool ccTouchBegan(cocos2d::CCTouch *touch, cocos2d::CCEvent *event);
    void setValidTouchRectInWorldSpace(cocos2d::CCRect rect) { this->validTouchRectInWorldSpace = rect; };
private:
    cocos2d::CCRect validTouchRectInWorldSpace;
};

class CCScrollViewEx : public cocos2d::extension::CCScrollView {
public:
    virtual void registerWithTouchDispatcher();
    virtual bool ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    virtual void ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    virtual void ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    virtual void ccTouchCancelled(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    CREATE_FUNC(CCScrollViewEx);
    void setMenu(cocos2d::CCMenu *menu);
    
    enum {
        kCCScrollViewExPriority = (cocos2d::kCCMenuHandlerPriority - 1)
    };
protected:
    cocos2d::CCPoint pressPoint;
    cocos2d::CCMenu *menu;
    bool waitingTouchEnd;
};

.cpp

bool CCMenuEx::ccTouchBegan(CCTouch *touch, CCEvent *event) {
    if (!validTouchRectInWorldSpace.size.width || !validTouchRectInWorldSpace.size.height) {
        return CCMenu::ccTouchBegan(touch, event);
    }
    
    CCPoint touchLocation = touch->getLocation();
    if (!validTouchRectInWorldSpace.containsPoint(touchLocation)) {
        return false;
    }
    
    return CCMenu::ccTouchBegan(touch, event);
}

void CCScrollViewEx::registerWithTouchDispatcher() {
    CCTouchDispatcher *dispatcher = CCDirector::sharedDirector()->getTouchDispatcher();
    dispatcher->addTargetedDelegate(this, kCCScrollViewExPriority, true);
}

bool CCScrollViewEx::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent) {
    pressPoint = pTouch->getLocationInView();
    if (menu) {
        waitingTouchEnd = menu->ccTouchBegan(pTouch, pEvent);
    }
    return CCScrollView::ccTouchBegan(pTouch, pEvent);
}

void CCScrollViewEx::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent) {
    if (waitingTouchEnd) {
        const float MIN_DISTANCE = 10;
        CCPoint endPoint = pTouch->getLocationInView();
        float distance = sqrtf((endPoint.x - pressPoint.x) * (endPoint.x - pressPoint.x) + (endPoint.y - pressPoint.y) * (endPoint.y - pressPoint.y));
        
        if(distance < MIN_DISTANCE) {
            if (menu) {
                menu->ccTouchMoved(pTouch, pEvent);
            }
        } else {
            if (menu) {
                menu->ccTouchCancelled(pTouch, pEvent);
                waitingTouchEnd = false;
            }
        }
    }
    CCScrollView::ccTouchMoved(pTouch, pEvent);
}

void CCScrollViewEx::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent)
{
    if (waitingTouchEnd) {
        const float MIN_DISTANCE = 10;
        CCPoint endPoint = pTouch->getLocationInView();
        float distance = sqrtf((endPoint.x - pressPoint.x) * (endPoint.x - pressPoint.x) + (endPoint.y - pressPoint.y) * (endPoint.y - pressPoint.y));
        
        if(distance < MIN_DISTANCE) {
            if (menu) {
                menu->ccTouchEnded(pTouch, pEvent);
            }
        } else {
            if (menu) {
                menu->ccTouchCancelled(pTouch, pEvent);
                waitingTouchEnd = false;
            }
        }
    }
    CCScrollView::ccTouchEnded(pTouch, pEvent);
}

void CCScrollViewEx::ccTouchCancelled(CCTouch *pTouch, CCEvent *pEvent) {
    if (menu && waitingTouchEnd) {
        menu->ccTouchCancelled(pTouch, pEvent);
        waitingTouchEnd = false;
    }
    CCScrollView::ccTouchCancelled(pTouch, pEvent);
}

void CCScrollViewEx::setMenu(CCMenu *menu) {
    this->menu = menu;
    CCMenuEx *ex = dynamic_cast<CCMenuEx *>(menu);
    if (ex) {
        ex->setValidTouchRectInWorldSpace(getViewRect());
    }
}

• CCMenuにはccTouchBeganでイベントを流す


• タッチ位置が一定以上移動したらCCMenuのタッチイベントはキャンセル(ccTouchCancelled)する


• setMenu()にCCMenuExが渡されたら、CCScrollViewExの表示サイズをタッチ可能領域とする