function touchHandler(event) {
    event.stopPropagation();
    var touches = event.changedTouches,
        first = touches[0],
        type = "";
    switch (event.type) {
        case "touchstart": type = "mousedown"; break;
        case "touchmove": type = "mousemove"; break;
        case "touchend": type = "mouseup"; break;
        default: return;
    }
    var simulatedEvent = new MouseEvent(type, { "altKey": false, "button": 0, "buttons": 0, "clientX": first.clientX, "clientY": first.clientY, "ctrlKey": false, "metaKey": false, "relatedTarget": first, "screenX": first.screenX, "screenY": first.screenY, "shiftKey": false });

    // var simulatedEvent = document.createEvent("MouseEvent");
    // simulatedEvent.initMouseEvent(type, true, true, window, 1,
    //     first.screenX, first.screenY,
    //     first.clientX, first.clientY, false,
    //     false, false, false, 0/*left*/, null);

    first.target.dispatchEvent(simulatedEvent);
}

function init() {
    document.addEventListener("touchstart", touchHandler, true);
    document.addEventListener("touchmove", touchHandler, true);
    document.addEventListener("touchend", touchHandler, true);
    document.addEventListener("touchcancel", touchHandler, true);


    HTMLElement.prototype.__defineGetter__("ondblclick", function () {
        return this.doubleTap;
    });

    HTMLElement.prototype.__defineSetter__("ondblclick", function (fun) {
        this.doubleTap = fun;
        $(this).on("doubleTap", fun)
    });
    var eventlstener = HTMLElement.prototype.addEventListener;

    HTMLElement.prototype.addEventListener = function (type, fun, op) {
        if (type == "click") {
            eventlstener.call(this, type, function (e) {
                if (!this.startTime) {
                    this.startTime = new Date().getTime();
                    fun.call(this);
                }
                else {
                    const time = new Date().getTime() - this.startTime;
                    this.startTime = new Date().getTime();
                    if (time > 200) {
                        fun.call(this);
                    }
                    else {
                        e.detail = 2;
                        fun.call(this);
                    }
                }

            }, op);
        }
        else {
            eventlstener.apply(this, arguments);
        }
    }


    // handleClick = (e: MouseEvent) => {
    //     // 节点拖拽进画布之后，不触发click事件相关emit
    //     // 点拖拽进画布没有触发mousedown事件，没有startTime，用这个值做区分
    //     if (!this.startTime) return;
    //     const time = new Date().getTime() - this.startTime;
    //     if (time > 200) return; // 事件大于200ms，认为是拖拽, 不触发click事件。
    //     const { model, graphModel } = this.props;
    //     // 节点数据，多为事件对象数据抛出
    //     const nodeData = model.getData();
    //     const position = graphModel.getPointByClient({
    //         x: e.clientX,
    //         y: e.clientY,
    //     });

    //     const eventOptions: EventArgs = {
    //         data: nodeData,
    //         e,
    //         position,
    //         isSelected: false,
    //         isMultiple: false,
    //     };

    //     const isRightClick = e.button === 2;
    //     // 这里 IE 11不能正确显示
    //     const isDoubleClick = e.detail === 2;

    //     // 判断是否有右击，如果有右击则取消点击事件触发
    //     if (isRightClick) return;

    //     const { editConfigModel } = graphModel;
    //     // 在multipleSelect tool禁用的情况下，允许取消选中节点
    //     const isMultiple = isMultipleSelect(e, editConfigModel);
    //     eventOptions.isMultiple = isMultiple;
    //     if (model.isSelected && !isDoubleClick && isMultiple) {
    //         eventOptions.isSelected = false;
    //         model.setSelected(false);
    //     } else {
    //         graphModel.selectNodeById(model.id, isMultiple);
    //         eventOptions.isSelected = true;
    //         this.toFront();
    //     }

    //     // 不是双击的，默认都是单击
    //     if (isDoubleClick) {
    //         if (editConfigModel.nodeTextEdit && model.text.editable) {
    //             model.setSelected(false);
    //             graphModel.setElementStateById(model.id, ElementState.TEXT_EDIT);
    //         }
    //         graphModel.eventCenter.emit(EventType.NODE_DBCLICK, eventOptions);
    //     } else {
    //         graphModel.eventCenter.emit(EventType.ELEMENT_CLICK, eventOptions);
    //         graphModel.eventCenter.emit(EventType.NODE_CLICK, eventOptions);
    //     }
    // };
}