radio-list

components.item-display.js

import Ember from 'ember';

export default Ember.Component.extend({
   	item: undefined,
  
  	onSelected(){},
  
    actions: {
        onClick() {
          this.onSelected(this);            
        }
    },
  
    id: Ember.computed('item', function () {
        return this.get('item').id;
    }),
  
    name: Ember.computed('item.name', function () {
        return this.get('item').name;
    }),
  
    selected: Ember.computed('item.selected', function () {
        return this.get('item').selected;
    }),
  
    notSelected: Ember.computed('item.selected', function () {
        return !this.get('item').selected;
    }),
});

components.radio-list.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  items: [],
  selectedItem: undefined,
  
  actions: {
    onSelectionChanged(itemDisplay) {
      this.get('items').forEach(item => {
        let selected = item.id === itemDisplay.id;
        
        console.log(`item.id ${item.id} itemDisplay.id ${itemDisplay.id} selected ${selected}`);
        
        Ember.set(item, 'selected', selected);
        
        if (selected) {
          this.set('selectedItem', item);
        }
      });
    }
  }

});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  items: [
    { id:1,name: 'One' },
    { id:2,name: 'Two' },
    { id:3,name: 'Three' }
  ]
});

styles.app.css

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

.item-display {
  cursor:pointer;

}

.item-display.selected {
  color: green;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{radio-list items=items}}
<br>
<br>

templates.components.item-display.hbs

<div class="item-display {{if selected "selected"}}" {{action "onClick" on="click" bubbles=false}}>
  {{#if selected}}
    <i class="fa fa-check-circle radio-btn"></i> X
  {{/if}}
  
  {{#if notSelected}}
    <i class="fa fa-circle-o radio-btn"></i> O
  {{/if}}
  
  <span>{{name}}</span>
</div>

templates.components.radio-list.hbs

{{#each items as |item|}}
    {{item-display item=item onSelected=onSelectionChanged}}
{{/each}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3",
    "ember-truth-helpers": "2.1.0"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}