devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/events/double_click.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import eventsEngine from "../events/core/events_engine";
import {
closestCommonParent
} from "../core/utils/dom";
import domAdapter from "../core/dom_adapter";
import Class from "../core/class";
import registerEvent from "./core/event_registrator";
import {
name as clickEventName
} from "./click";
import {
addNamespace,
fireEvent
} from "./utils/index";
var DBLCLICK_EVENT_NAME = "dxdblclick";
var DBLCLICK_NAMESPACE = "dxDblClick";
var NAMESPACED_CLICK_EVENT = addNamespace(clickEventName, DBLCLICK_NAMESPACE);
var DBLCLICK_TIMEOUT = 300;
var DblClick = Class.inherit({
ctor: function() {
this._handlerCount = 0;
this._forgetLastClick()
},
_forgetLastClick: function() {
this._firstClickTarget = null;
this._lastClickTimeStamp = -DBLCLICK_TIMEOUT
},
add: function() {
if (this._handlerCount <= 0) {
eventsEngine.on(domAdapter.getDocument(), NAMESPACED_CLICK_EVENT, this._clickHandler.bind(this))
}
this._handlerCount++
},
_clickHandler: function(e) {
var timeStamp = e.timeStamp || Date.now();
var timeBetweenClicks = timeStamp - this._lastClickTimeStamp;
var isSimulated = timeBetweenClicks < 0;
var isDouble = !isSimulated && timeBetweenClicks < DBLCLICK_TIMEOUT;
if (isDouble) {
fireEvent({
type: DBLCLICK_EVENT_NAME,
target: closestCommonParent(this._firstClickTarget, e.target),
originalEvent: e
});
this._forgetLastClick()
} else {
this._firstClickTarget = e.target;
this._lastClickTimeStamp = timeStamp
}
},
remove: function() {
this._handlerCount--;
if (this._handlerCount <= 0) {
this._forgetLastClick();
eventsEngine.off(domAdapter.getDocument(), NAMESPACED_CLICK_EVENT)
}
}
});
registerEvent(DBLCLICK_EVENT_NAME, new DblClick);
export {
DBLCLICK_EVENT_NAME as name
};