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<h1 class="page-title">Source: core/SignalBinding.js</h1>
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<section>
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<article>
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<pre class="sunlight-highlight-javascript linenums">/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2013 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* Phaser.SignalBinding
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*
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* Object that represents a binding between a Signal and a listener function.
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* <br />- <strong>This is an internal constructor and shouldn't be called by regular users.</strong>
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* <br />- inspired by Joa Ebert AS3 SignalBinding and Robert Penner's Slot classes.
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*
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* @class Phaser.SignalBinding
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* @name SignalBinding
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* @author Miller Medeiros http://millermedeiros.github.com/js-signals/
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* @constructor
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* @inner
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* @param {Signal} signal - Reference to Signal object that listener is currently bound to.
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* @param {function} listener - Handler function bound to the signal.
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* @param {boolean} isOnce - If binding should be executed just once.
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* @param {object} [listenerContext] - Context on which listener will be executed (object that should represent the `this` variable inside listener function).
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* @param {number} [priority] - The priority level of the event listener. (default = 0).
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*/
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Phaser.SignalBinding = function (signal, listener, isOnce, listenerContext, priority) {
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/**
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* @property {Phaser.Game} _listener - Handler function bound to the signal.
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* @private
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*/
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this._listener = listener;
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/**
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* @property {boolean} _isOnce - If binding should be executed just once.
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* @private
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*/
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this._isOnce = isOnce;
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/**
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* @property {object|undefined|null} context - Context on which listener will be executed (object that should represent the `this` variable inside listener function).
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* @memberof SignalBinding.prototype
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*/
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this.context = listenerContext;
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/**
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* @property {Signal} _signal - Reference to Signal object that listener is currently bound to.
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* @private
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*/
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this._signal = signal;
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/**
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* @property {number} _priority - Listener priority.
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* @private
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*/
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this._priority = priority || 0;
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};
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Phaser.SignalBinding.prototype = {
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/**
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* If binding is active and should be executed.
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* @property {boolean} active
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* @default
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*/
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active: true,
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/**
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* Default parameters passed to listener during `Signal.dispatch` and `SignalBinding.execute` (curried parameters).
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* @property {array|null} params
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* @default
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*/
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params: null,
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/**
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* Call listener passing arbitrary parameters.
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* <p>If binding was added using `Signal.addOnce()` it will be automatically removed from signal dispatch queue, this method is used internally for the signal dispatch.</p>
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* @method Phaser.SignalBinding#execute
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* @param {array} [paramsArr] - Array of parameters that should be passed to the listener.
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* @return {Description} Value returned by the listener.
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*/
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execute: function (paramsArr) {
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var handlerReturn, params;
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if (this.active && !!this._listener)
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{
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params = this.params? this.params.concat(paramsArr) : paramsArr;
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handlerReturn = this._listener.apply(this.context, params);
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if (this._isOnce)
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{
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this.detach();
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}
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}
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return handlerReturn;
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},
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/**
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* Detach binding from signal.
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* <p>alias to: @see mySignal.remove(myBinding.getListener());
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* @method Phaser.SignalBinding#detach
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* @return {function|null} Handler function bound to the signal or `null` if binding was previously detached.
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*/
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detach: function () {
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return this.isBound() ? this._signal.remove(this._listener, this.context) : null;
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},
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/**
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* @method Phaser.SignalBinding#isBound
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* @return {boolean} True if binding is still bound to the signal and has a listener.
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*/
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isBound: function () {
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return (!!this._signal && !!this._listener);
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},
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/**
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* @method Phaser.SignalBinding#isOnce
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* @return {boolean} If SignalBinding will only be executed once.
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*/
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isOnce: function () {
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return this._isOnce;
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},
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/**
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* @method Phaser.SignalBinding#getListener
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* @return {Function} Handler function bound to the signal.
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*/
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getListener: function () {
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return this._listener;
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},
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/**
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* @method Phaser.SignalBinding#getSignal
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* @return {Signal} Signal that listener is currently bound to.
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*/
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getSignal: function () {
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return this._signal;
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},
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/**
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* @method Phaser.SignalBinding#_destroy
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* Delete instance properties
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* @private
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*/
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_destroy: function () {
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delete this._signal;
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delete this._listener;
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delete this.context;
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},
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/**
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* @method Phaser.SignalBinding#toString
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* @return {string} String representation of the object.
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*/
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toString: function () {
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return '[Phaser.SignalBinding isOnce:' + this._isOnce +', isBound:'+ this.isBound() +', active:' + this.active + ']';
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}
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};
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</pre>
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</article>
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Phaser Copyright © 2012-2013 Photon Storm Ltd.
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<br />
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<span class="jsdoc-message">
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.0-dev</a>
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on Wed Oct 23 2013 13:51:58 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
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