Ember.Evented Class
This mixin allows for Ember objects to subscribe to and emit events.
App.Person = Ember.Object.extend(Ember.Evented, {
greet: function() {
// ...
this.trigger('greet');
}
});
var person = App.Person.create();
person.on('greet', function() {
console.log('Our person has greeted');
});
person.greet();
// outputs: 'Our person has greeted'
You can also chain multiple event subscriptions:
person.on('greet', function() {
console.log('Our person has greeted');
}).one('greet', function() {
console.log('Offer one-time special');
}).off('event', this, forgetThis);
Methods
has
-
name
Checks to see if object has any subscriptions for named event.
Parameters:
-
nameStringThe name of the event
Returns:
does the object have a subscription for event
off
-
name -
target -
method
Cancels subscription for given name, target, and method.
Parameters:
Returns:
this
on
-
name -
[target] -
method
Subscribes to a named event with given function.
person.on('didLoad', function() {
// fired once the person has loaded
});
An optional target can be passed in as the 2nd argument that will be set as the "this" for the callback. This is a good way to give your function access to the object triggering the event. When the target parameter is used the callback becomes the third argument.
Parameters:
Returns:
this
one
-
name -
[target] -
method
Subscribes a function to a named event and then cancels the subscription
after the first time the event is triggered. It is good to use one when
you only care about the first time an event has taken place.
This function takes an optional 2nd argument that will become the "this" value for the callback. If this argument is passed then the 3rd argument becomes the function.
Parameters:
Returns:
this
trigger
-
name -
args
Triggers a named event for the object. Any additional arguments will be passed as parameters to the functions that are subscribed to the event.
person.on('didEat', function(food) {
console.log('person ate some ' + food);
});
person.trigger('didEat', 'broccoli');
// outputs: person ate some broccoli
Parameters:
-
nameStringThe name of the event
-
argsObject...Optional arguments to pass on