?/*
* Copyright © Aleksey Nemiro, 2015. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
module Nemiro {
/**
* Represents the event handlers for the specified object.
*/
export class EventHandlers<T> {
/** The name of event. */
public Name: string;
/** The event handlers list. */
private Items: { (sender: any, args?: T): void; }[] = [];
/** The event subscriber. */
private Subscriber: any = null;
constructor(eventName: string, subscriber: any) {
if (eventName === undefined || eventName == null || eventName == '') {
throw new Error('The parameter "eventName" is required and can not be empty!');
}
if (subscriber === undefined || subscriber == null) {
throw new Error('The parameter "subscriber" is requier! Enter a reference to the object that owns the event handlers.');
}
this.Name = eventName;
this.Subscriber = subscriber;
}
/**
* Adds an event handler.
*
* @params handler Function - the event handler.
*/
public Add(handler: { (sender: any, args?: T): void; }) {
if (handler === undefined || handler == null) {
throw new Error('The handler is required!');
}
if (typeof handler != 'function') {
throw new Error('The "handler" should be a function!');
}
this.Items.push(handler);
}
/**
* Removes the event handler.
*
* @params handler Function - the event handler.
*/
public Remove(handler: { (sender: any, args?: T): void; }) {
this.Items = this.Items.filter(h => h !== handler);
}
/**
* Invokes the handler.
*
* @params args Additional arguments that will be passed to the handler.
*/
public Trigger(args?: T) {
console.log('Trigger ', this.Name, args);
for (var i = 0; i < this.Items.length; i++) {
this.Items[i](this.Subscriber, args);
}
}
}
}
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