【cocos2d-js公文】十七、事件分发机制

    var sprite1 = new cc.Sprite("Images/CyanSquare.png");
    sprite1.x = size.width/2 - 80;
    sprite1.y = size.height/2 + 80;
    this.addChild(sprite1, 10);

    var sprite2 = new cc.Sprite("Images/MagentaSquare.png");
    sprite2.x = size.width/2;
    sprite2.y = size.height/2;
    this.addChild(sprite2, 20);

    var sprite3 = new cc.Sprite("Images/YellowSquare.png");
    sprite3.x = 0;
    sprite3.y = 0;
    sprite2.addChild(sprite3, 1);

    // 创建一个事件监听器 OneByOne 为单点触摸
    var listener1 = cc.EventListener.create({
        event: cc.EventListener.TOUCH_ONE_BY_ONE,
        swallowTouches: true,                       // 设置是否吞没事件，在 onTouchBegan 方法返回 true 时吞掉事件，不再向下传递。

        onTouchBegan: function (touch, event) {     //实现 onTouchBegan 事件处理回调函数
            var target = event.getCurrentTarget();  // 获取事件所绑定的 target, 一般是cc.Node及其子类 

            // 获取当前触摸点相对于button所在的坐标
            var locationInNode = target.convertToNodeSpace(touch.getLocation());    
            var s = target.getContentSize();
            var rect = cc.rect(0, 0, s.width, s.height);

            if (cc.rectContainsPoint(rect, locationInNode)) {       // 推断触摸点是否在button范围内
                cc.log("sprite began... x = " + locationInNode.x + ", y = " + locationInNode.y);
                target.opacity = 180;
                return true;
            }
            return false;
        },
        onTouchMoved: function (touch, event) {         //实现onTouchMoved事件处理回调函数, 触摸移动时触发
            // 移动当前button精灵的坐标位置
            var target = event.getCurrentTarget();
            var delta = touch.getDelta();              //获取事件数据: delta
            target.x += delta.x;
            target.y += delta.y;
        },
        onTouchEnded: function (touch, event) {         // 实现onTouchEnded事件处理回调函数
            var target = event.getCurrentTarget();
            cc.log("sprite onTouchesEnded.. ");
            target.setOpacity(255);
            if (target == sprite2) {                    
                sprite1.setLocalZOrder(100);            // 又一次设置 ZOrder。显示的前后顺序将会改变
            } else if (target == sprite1) {
                sprite1.setLocalZOrder(0);
            }
        }
    });

    // 加入监听器到管理器
    cc.eventManager.addListener(listener1, sprite1);
    cc.eventManager.addListener(listener1.clone(), sprite2);
    cc.eventManager.addListener(listener1.clone(), sprite3);

    cc.eventManager.addListener({
        event: cc.EventListener.TOUCH_ALL_AT_ONCE,
        onTouchesMoved: function (touches, event) {
            var touch = touches[0];
            var delta = touch.getDelta();

            var node = event.getCurrentTarget().getChildByTag(TAG_TILE_MAP);
            var diff = cc.pAdd(delta, node.getPosition());
            node.setPosition(diff);
        }
    }, this);

    //给statusLabel绑定键盘事件
    cc.eventManager.addListener({
        event: cc.EventListener.KEYBOARD,
        onKeyPressed:  function(keyCode, event){
            var label = event.getCurrentTarget();
            //通过推断keyCode来确定用户按下了哪个键
            label.setString("Key " + keyCode.toString() + " was pressed!");
        },
        onKeyReleased: function(keyCode, event){
            var label = event.getCurrentTarget();
            label.setString("Key " + keyCode.toString() + " was released!");
        }
    }, statusLabel);    

        cc.eventManager.addListener({
            event: cc.EventListener.ACCELERATION,
            callback: function(acc, event){
                //这里处理逻辑
            }
        }, sprite); 

    cc.eventManager.addListener({
        event: cc.EventListener.MOUSE,
        onMouseMove: function(event){
            var str = "MousePosition X: " + event.getLocationX() + "  Y:" + event.getLocationY();
            // do something...
        },
        onMouseUp: function(event){
            var str = "Mouse Up detected, Key: " + event.getButton();
            // do something...
        },
        onMouseDown: function(event){
            var str = "Mouse Down detected, Key: " + event.getButton();
            // do something...
        },
        onMouseScroll: function(event){
            var str = "Mouse Scroll detected, X: " + event.getLocationX() + "  Y:" + event.getLocationY();
            // do something...
        }
    },this);

    var _listener1 = cc.EventListener.create({
        event: cc.EventListener.CUSTOM,
        eventName: "game_custom_event1",
        callback: function(event){
            // 能够通过getUserData来设置须要传输的用户自己定义数据
            statusLabel.setString("Custom event 1 received, " + event.getUserData() + " times");
        }
    });    
    cc.eventManager.addListener(this._listener1, 1);

    ++this._item1Count;
    var event = new cc.EventCustom("game_custom_event1");
    event.setUserData(this._item1Count.toString());
    cc.eventManager.dispatchEvent(event);       

    cc.eventManager.removeListener(listener);           //移除一个已加入的监听器

    cc.eventManager.removeListeners(cc.EventListener.TOUCH_ONE_BY_ONE);         //移除全部单点触摸事件监听器
    cc.eventManager.removeListeners(aSprite);                                   //移除全部与aSprite相关的监听器

    cc.eventManager.removeAllListeners();

    cc.eventManager.pauseTarget(aLayer, true);                      //让aLayer对象暂停响应事件

    cc.eventManager.resumeTarget(aLayer, true);                     //让aLayer对象恢复响应事件

    this._touchListener = cc.EventListener.create({
        event: cc.EventListener.TOUCH_ONE_BY_ONE,
        swallowTouches: true,
        onTouchBegan: this.onTouchBegan.bind(this),
        onTouchMoved: this.onTouchMoved.bind(this),
        onTouchEnded: this.onTouchEnded.bind(this)
     });
     cc.eventManager.addListener(this._touchListener, this);

    interceptTouchEvent: function(eventType, sender, touch){
        var widgetParent = this.getWidgetParent();
        if (widgetParent)
            widgetParent.interceptTouchEvent(eventType,sender,touch);
    }

    interceptTouchEvent: function (eventType, sender, touch) {
        var touchPoint = touch.getLocation();
        switch (eventType) {
            case ccui.Widget.TOUCH_BEGAN:
                this._touchBeganPosition.x = touchPoint.x;
                this._touchBeganPosition.y = touchPoint.y;
                break;
            case ccui.Widget.TOUCH_MOVED:
                this._touchMovePosition.x = touchPoint.x;
                this._touchMovePosition.y = touchPoint.y;
                var offset = 0;
                offset = Math.abs(sender.getTouchBeganPosition().x - touchPoint.x);
                if (offset > this._childFocusCancelOffset) {
                    sender.setFocused(false);
                    this._handleMoveLogic(touch);  
                }
                break;
            case ccui.Widget.TOUCH_ENDED:
            case ccui.Widget.TOUCH_CANCELED:
                this._touchEndPosition.x = touchPoint.x;
                this._touchEndPosition.y = touchPoint.y;
                this._handleReleaseLogic(touch);
                break;
        }
    }