New Twiddle

components.base-svg-0.js

import BaseSvg from './base-svg';

export default BaseSvg.extend({
  tagName: 'rect',
  fill: Ember.computed.readOnly('layerModel.color')
});

components.base-svg-1.js

import BaseSvg from './base-svg';

export default BaseSvg.extend({
  tagName: 'rect',
  fill: Ember.computed.readOnly('layerModel.color')
});

components.base-svg-2.js

import BaseSvg from './base-svg';

export default BaseSvg.extend({
  tagName: 'rect',
  fill: Ember.computed.readOnly('layerModel.color')
});

components.base-svg-3.js

import BaseSvg from './base-svg';

export default BaseSvg.extend({
  tagName: 'rect',
  fill: Ember.computed.readOnly('layerModel.color')
});

components.base-svg.js

import Ember from 'ember';

export default Ember.Component.extend({
  attributeBindings: ['fill', 'x', 'y', 'width', 'height'],
  
  x: 0,
  y: 0,
  width: 20,
  height: 20
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  dictionary: {
    'base-svg-0': {
      getX: () {},
    	getY: () {},
      getWidth: () {},
      getHeight: () {}
    }
  },
  
  layers: ['0', '1', '2', '3'],
  
  model: {
    0: [
      { type: 'base-svg-0', color: 'red' }
    ],
    1: [],
    2: [],
    3: []
  }
});

templates.application.hbs

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

<svg width=400 height=400>
	{{#each layers as |layer|}}
  	{{#each (get model layer) as |layerModel|}}
      {{component layerModel.type
      	dictionary=dictionary
        model=model
        layerModel=layerModel
      }}
    {{/each}}
  {{/each}}
</svg>
<br>
<br>

templates.components.base-svg-0.hbs

{{yield}}

templates.components.base-svg-1.hbs

{{yield}}

templates.components.base-svg-2.hbs

{{yield}}

templates.components.base-svg-3.hbs

{{yield}}

templates.components.base-svg.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": {}
}