cc.Class({
    extends: cc.Component,
    properties: {
        
    },
    onLoad () {
        let scrollView = this.node.getComponent(cc.ScrollView);
        if (scrollView == null) {
            return;
        }
        let parentScrollView = this.getComponentInParent(cc.ScrollView);
        if (parentScrollView == null) {
            return;
        }

        this.parentScrollView = parentScrollView;

        this.oldOnTouchBegan = scrollView._onTouchBegan.bind(scrollView);
        this.oldOnTouchMoved  = scrollView._onTouchMoved.bind(scrollView);
        this.oldOnTouchEnded  = scrollView._onTouchEnded.bind(scrollView);

        scrollView._onTouchBegan = this.onTouchBegan.bind(this);
        scrollView._onTouchMoved = this.onTouchMoved.bind(this);
        scrollView._onTouchEnded = this.onTouchEnded.bind(this);
    },

    onTouchBegan(event, captureListeners) {
        this.oldOnTouchBegan(event, captureListeners);
        this.parentScrollView._onTouchBegan(event, captureListeners);
    },
    
    onTouchMoved(event, captureListeners) {
        this.oldOnTouchMoved(event, captureListeners);
        this.parentScrollView._onTouchMoved(event, captureListeners);
    },

    onTouchEnded(event, captureListeners) {
        this.oldOnTouchEnded(event, captureListeners);
        this.parentScrollView._onTouchEnded(event, captureListeners);
    },

    getComponentInParent(component) {
        let parent = this.node.parent;
        let result = null;
        while(parent != null) {
            let scrollView = parent.getComponent(component);
            if (scrollView != null) {
                result = scrollView;
                break;
            }
            parent = parent.parent;
        }
        return result;
    },
});