drop-down

components.drop-down-header.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['dropdown-header']
});

components.drop-down-option-container.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNameBindings: [':dropdown-options', 'expanded:expanded'],
  
});

components.drop-down-option.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['dropdown-option'],
  click(){
    this.get('update')(this.get('value'));
  }                               
});

components.drop-down.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['dropdown'],
  expanded: false,
  actions: {
    update(value){
      this.get('update')(value);
      this.set('expanded', false);
    },
    toggleExpanded() {
      this.toggleProperty('expanded');
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  timeFrameOptions: Ember.A([
    { value: 7, label: 'Past 7 Days' },
    { value: 30, label: 'Past 30 Days' },
    { value: 90, label: 'Past 90 Days' },
    { value: 'quarter', label: 'Quarter to Date' },
    { value: 'year', label: 'Year to Date' }
  ]),
  timeFrame: 30,
  timeFrameLabel: Ember.computed('timeFrame', 'timeFrameOptions', function(){
     return this.get('timeFrameOptions').findBy('value', this.get('timeFrame')).label;
    }),
     
	actions: {
    updateTimeFrame(timeFrameValue){
    	this.set('timeFrame', timeFrameValue);
		}
  } 
});

styles.app.css

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

.dropdown {
}

.dropdown-header {
  background: grey;
  color: white;
  padding: 10px;
	border-radius: 10px;
  text-align: center;
}

.dropdown-options {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-out;
}
.dropdown-options-container {
  background: #999;
  color: white;
  padding: 10px;
  border-radius: 10px;

}

.dropdown-options.expanded {
	max-height: 1000px;
  transition: max-height 0.5s ease-in;
}
.dropdown-option {
  padding:5px;
  border-radius: 5px;
  text-align: center;
}
.dropdown-option:hover {
  background: white;
  color: grey;
}

templates.application.hbs

{{#drop-down update=(action 'updateTimeFrame') as |h| }}
	{{#h.header}}{{timeFrameLabel}}{{/h.header}}
  {{#h.optionsContainer}}
  	{{#each timeFrameOptions as |option|}}
    	{{#h.option value = option.value}}
        {{option.label}}
      {{/h.option}}
    {{/each}}
  {{/h.optionsContainer}}
{{/drop-down}}

templates.components.drop-down-header.hbs

{{yield}}

templates.components.drop-down-option-container.hbs

<div class="dropdown-options-container">
	{{yield}}
</div>

templates.components.drop-down-option.hbs

{{yield}}

templates.components.drop-down.hbs

{{yield 
	(hash 
		header=(component 'drop-down-header' click=(action 'toggleExpanded'))
  	optionsContainer=(component 'drop-down-option-container' expanded=expanded) 
  	option=(component 'drop-down-option' update=(action 'update'))
	)}}

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember-template-compiler.js"
  }
}