devextreme/core/events_mixin.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (core/events_mixin.js)
 * Version: 18.2.18
 * Build date: Tue Oct 18 2022
 *
 * Copyright (c) 2012 - 2022 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
var DefaultEventsStrategy = require("./events_strategy"),
    each = require("./utils/iterator").each,
    isPlainObject = require("./utils/type").isPlainObject;
module.exports = {
    ctor: function() {
        this._events = {};
        this.setEventsStrategy(new DefaultEventsStrategy(this))
    },
    setEventsStrategy: function(strategy) {
        if ("function" === typeof strategy) {
            strategy = strategy(this)
        }
        this._eventsStrategy = strategy
    },
    hasEvent: function(eventName) {
        return this._eventsStrategy.hasEvent(eventName)
    },
    fireEvent: function(eventName, eventArgs) {
        this._eventsStrategy.fireEvent(eventName, eventArgs);
        return this
    },
    on: function(eventName, eventHandler) {
        if (isPlainObject(eventName)) {
            each(eventName, function(e, h) {
                this.on(e, h)
            }.bind(this))
        } else {
            this._eventsStrategy.on(eventName, eventHandler)
        }
        return this
    },
    off: function(eventName, eventHandler) {
        this._eventsStrategy.off(eventName, eventHandler);
        return this
    },
    _disposeEvents: function() {
        this._eventsStrategy.dispose()
    }
};