mouse move

components.move-me.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['move-me'],
  classNameBindings: ['movable'],
  attributeBindings: ['style'],
  
  mouseDown() {
  	this.set('moving', true);
  	this.set('movable', true);
  },
  mouseUp() {
  	this.set('moving', false);
  },
  mouseLeave() {
    this.set('moving', false);
  },
  mouseMove(event) {
    if (this.get('moving')) {
      this.set('style', `left: ${event.clientX-30}px; top: ${event.clientY-30}px;`);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.movable {
	position: fixed;
}
.move-me {
	border: 1px solid red;
  box-sizing: border-box;
  width: 150px;
  height: 150px;
}

templates.application.hbs

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

{{#move-me}}
Move me!
{{/move-me}}
<br>
<br>

templates.components.move-me.hbs

{{yield}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}