Ember:嵌套组件事件冒泡

Question

我创建了一组嵌套组件.

代码在这里:http://emberjs.jsbin.com/hasehija/2/edit.

HTML:

{{#level-1}}
    {{#level-2}}
      {{#level-3}}
        <button {{action 'handleAction'}}>
          Click me (yielded)
        </button>
      {{/level-3}}
    {{/level-2}}
 {{/level-1}}

JS:

App.ApplicationController = Ember.Controller.extend({
  actions: {
    handleAction: function() {
      alert('Handled in ApplicationController');
    }
  }
});

App.Level1Component = Ember.Component.extend({
  actions: {
    handleAction: function() {
      alert('Handled in Level 1');
    }
  }
});

App.Level2Component = Ember.Component.extend({
  actions: {
    handleAction: function() {
      alert('Handled in Level 2');
    }
  }
});

App.Level3Component = Ember.Component.extend({
  actions: {
    handleAction: function() {
      alert('Handled in Level 3');
      this.set('action', 'handleAction');
      this.sendAction();
    }
  }
});

我想要实现的是以下列方式鼓泡事件:

Level3Component -> Level2Component -> Level1Component -> ApplicationController

不幸的是,我无法处理任何组件内的事件; 事件冒出来了ApplicationController.

有没有办法强制组件的操作在组件的整个层次结构上冒泡,以便我有4次显示警报(当然在添加this.sendAction之后)？

再一次,这是您可以使用的代码:http://emberjs.jsbin.com/hasehija/2/edit.

Answer 1

根据您的示例,您必须将组件targetObject属性定义为:

App.Level3Component = Ember.Component.extend({
  action: 'handleAction',
  targetObject: Em.computed.alias('parentView'),  
  actions: {
    handleAction: function() {
      alert('Handled in Level 3');
      this.sendAction();
    }
  }
});

http://emberjs.jsbin.com/hasehija/5/edit