xample

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  
  actions: {
    awesomeRowMouseEnterAction: function() {
      alert("this is a MouseEnter from the application controller!!");
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

{{awesome-row mouseEnterAction=(action 'awesomeRowMouseEnterAction')}}
<br>
<br>

awesome-row.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  data: ['x', 'o', ' '],
  
  click: function() {
  	alert('abc');
  },
  
  mouseEnter: function() {
  	this.attrs.mouseEnterAction();
  }
});

awesome-row.template.hbs

{{#each data as |col|}}
  {{col}}
{{/each}}

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}