High Five

components.raised-hands.js

import Ember from 'ember';

const {
  Component,
  computed,
  get,
  run,
  set
} = Ember;

export default Component.extend({
  classNames: ['raised-hands'],
  classNameBindings: ['currentImage', 'initialAnimation', 'followOnAnimation', 'reset'],
  
  images: [
    "tone-1f3fb",
    "tone-1f3fc",
    "tone-1f3ff",
    "tone-1f3fe",
    "tone-1f3fd"
  ],
  
  currentImage: null,
  followOnAnimation: false,
  initialAnimation: true,
  reset: false,
  
  init() {
    this._super(...arguments);
    this.selectImage();
  },
  
  availableImages: computed.setDiff('images', 'currentImageArray'),
  
  currentImageArray: computed('currentImage', function() {
    let currentImage = get(this, 'currentImage');
    return [currentImage];
  }),
  
  selectImage() {
    let images = get(this, 'availableImages');
		let image = images[Math.floor(Math.random() * images.length)];
    set(this, 'currentImage', image);
		let that = this;
    let followOnTimer = run.later((function() {
			set(that, 'followOnAnimation', false);
		}), 500);
		set(this, 'timer', followOnTimer);
    set(this, 'reset', true);
    run.later((function() {
      set(that, 'reset', false);
		}), 1);
  },

  click() {
    let that = this;
    let timer = get(this, 'timer');
    run.cancel(timer);
    this.selectImage();
	  set(that, 'initialAnimation', false);
		set(that, 'followOnAnimation', true);
  }
});

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;
}

.raised-hands {
  cursor: pointer;
  position: absolute;
  left: 100px;
  top: 100px;
  background-image: url('https://cl.ly/0R383N3B1U1L/emoji-1f64c-sprite.png');
  background-repeat: no-repeat;
  background-size: 500px 100px;
  width: 100px;
  height: 100px;
  to {width: auto;}
}

.raised-hands.tone-1f3fb {
  background-position: -400px 0;
}

.raised-hands.tone-1f3fc {
  background-position: -300px 0;
}

.raised-hands.tone-1f3fd {
  background-position: -200px 0;
}

.raised-hands.tone-1f3fe {
  background-position: -100px 0;
}

.raised-hands.tone-1f3ff {
  background-position: 0 0;
}

.initial-animation.raised-hands {
  animation: pulsate 0.5s ease-out;
  animation-delay: 0.75s;
}

.follow-on-animation.raised-hands {
  animation: pulsate 0.5s ease-out;
  animation-delay: 0;
}

.reset.raised-hands {
  animation: emptyAnimation;
}

@keyframes emptyAnimation {}

@-webkit-keyframes pulsate {
  25% {transform: scale(1.3, 1.3);}
  100% {transform: scale(1.0, 1.0);}
}

@-webkit-keyframes reset {
  100% {transform: scale(1.0, 1.0);}
}

templates.application.hbs

{{raised-hands}}

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": {}
}