Merge pull request #43 from justcoin/remove-event-emitter
Remove event emitter
This commit is contained in:
commit
f4b819e1af
1 changed files with 0 additions and 98 deletions
|
@ -1,98 +0,0 @@
|
|||
/**
|
||||
* EventEmitter Mixin
|
||||
*
|
||||
* Designed to be used in conjunction with a mixin "augment" function,
|
||||
* such as http://chamnapchhorn.blogspot.com/2009/05/javascript-mixins.html
|
||||
*
|
||||
* @usage augment(MyClass, EventEmitter);
|
||||
* my_inst = new MyClass();
|
||||
* my_inst.on('someEvent', function(e){ console.dir(e); });
|
||||
* my_inst.trigger('someEvent', {eventProp:'value'});
|
||||
*
|
||||
* @example
|
||||
* // create a 'class'
|
||||
* MyClass = function() {}
|
||||
* // augment it with EventEmitter
|
||||
* EventEmitter.augment(MyClass.prototype);
|
||||
* // create a method, which triggers an event
|
||||
* MyClass.prototype.scrollComplete = function() {
|
||||
* this.trigger('scrolled', {baz:'eck'});
|
||||
* };
|
||||
*
|
||||
* // this callback is pulled out into a named function so that we can unbind it
|
||||
* var callback = function(e) {
|
||||
* console.log('the scrolled event was fired! this.foo='+this.foo+', e.baz='+e.baz);
|
||||
* };
|
||||
* // create an instance of th class
|
||||
* var myinstance = new MyClass();
|
||||
* // set a property on the instance
|
||||
* myinstance.foo = 'bar';
|
||||
* // bind to the scrollComplete event
|
||||
* myinstance.on('scrolled', callback, myinstance);
|
||||
* // fire the method, which should trigger the event and therefore our callback
|
||||
* myinstance.scrollComplete();
|
||||
* // unbind the event, so that our callback should not get called
|
||||
* myinstance.removeListener('scrolled', callback);
|
||||
* // this should now not fire the callback
|
||||
* myinstance.scrollComplete();
|
||||
*/
|
||||
var EventEmitter = function() {};
|
||||
/**
|
||||
* Bind a callback to an event, with an option scope context
|
||||
*
|
||||
* @param {string} name the name of the event
|
||||
* @param {function} callback the callback function to fire when the event is triggered
|
||||
* @param {object} context the scope to use for the callback (which will become 'this' inside the callback)
|
||||
*/
|
||||
EventEmitter.prototype.on = function(name, callback, context) {
|
||||
if (!context) context = this;
|
||||
if (!this._listeners) this._listeners = {};
|
||||
if (!this._listeners[name]) this._listeners[name] = [];
|
||||
if (!this._unbinders) this._unbinders = {};
|
||||
if (!this._unbinders[name]) this._unbinders[name] = [];
|
||||
var f = function(e) {
|
||||
callback.apply(context, [e]);
|
||||
};
|
||||
this._unbinders[name].push(callback);
|
||||
this._listeners[name].push(f);
|
||||
};
|
||||
/**
|
||||
* Trigger an event, firing all bound callbacks
|
||||
*
|
||||
* @param {string} name the name of the event
|
||||
* @param {object} event the event object to be passed through to the callback
|
||||
*/
|
||||
EventEmitter.prototype.trigger = function(name, event) {
|
||||
if (event === undefined) event = {}
|
||||
if (!this._listeners) this._listeners = {};
|
||||
if (!this._listeners[name]) return;
|
||||
var i = this._listeners[name].length;
|
||||
while (i--) this._listeners[name][i](event);
|
||||
};
|
||||
/**
|
||||
* Remove a bound listener
|
||||
*
|
||||
* @param {string} name the name of the event
|
||||
* @param {object} event the event object to be passed through to the callback
|
||||
*/
|
||||
EventEmitter.prototype.removeListener = function(name, callback) {
|
||||
if (!this._unbinders) this._unbinders = {};
|
||||
if (!this._unbinders[name]) return;
|
||||
var i = this._unbinders[name].length;
|
||||
while (i--) {
|
||||
if (this._unbinders[name][i] === callback) {
|
||||
this._unbinders[name].splice(i, 1);
|
||||
this._listeners[name].splice(i, 1);
|
||||
}
|
||||
}
|
||||
};
|
||||
/**
|
||||
* Augment an object with the EventEmitter mixin
|
||||
*
|
||||
* @param {object} obj The object to be augmented (often an object's protoype)
|
||||
*/
|
||||
EventEmitter.augment = function(obj) {
|
||||
for (var method in EventEmitter.prototype) {
|
||||
if (!obj[method]) obj[method] = EventEmitter.prototype[method];
|
||||
}
|
||||
};
|
Loading…
Reference in a new issue