third_party/polymer/v1_0/components/neon-animation/animations/reverse-ripple-animation.html

   1 <!--
   2 @license
   3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
   4 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
   5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
   6 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
   7 Code distributed by Google as part of the polymer project is also
   8 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
   9 -->
  10
  11
  12 <link rel="import" href="../../polymer/polymer.html">
  13 <link rel="import" href="../neon-shared-element-animation-behavior.html">
  14 <link rel="import" href="../web-animations.html">
  15
  16 <!--
  17 `<reverse-ripple-animation>` scales and transform an element such that it appears to ripple down from this element, to either
  18 a shared element, or a screen position.
  19
  20 If using as a shared element animation in `<neon-animated-pages>`, use this animation in an `exit`
  21 animation in the source page and in an `entry` animation in the destination page. Also, define the
  22 reverse-ripple elements in the `sharedElements` property (not a configuration property, see
  23 `Polymer.NeonSharedElementAnimatableBehavior`).
  24 If using a screen position, define the `gesture` property.
  25 Configuration:
  26 ```
  27 {
  28   name: 'reverse-ripple-animation`.
  29   id: <shared-element-id>, /* set this or gesture */
  30   gesture: {x: <page-x>, y: <page-y>}, /* set this or id */
  31   timing: <animation-timing>,
  32   toPage: <node>, /* define for the destination page */
  33   fromPage: <node>, /* define for the source page */
  34 }
  35 ```
  36 -->
  37
  38 <script>
  39   Polymer({
  40     is: 'reverse-ripple-animation',
  41
  42     behaviors: [
  43       Polymer.NeonSharedElementAnimationBehavior
  44     ],
  45
  46     configure: function(config) {
  47       var shared = this.findSharedElements(config);
  48       if (!shared) {
  49         return null;
  50       }
  51
  52       var translateX, translateY;
  53       var fromRect = shared.from.getBoundingClientRect();
  54       if (config.gesture) {
  55         translateX = config.gesture.x - (fromRect.left + (fromRect.width / 2));
  56         translateY = config.gesture.y - (fromRect.top + (fromRect.height / 2));
  57       } else {
  58         var toRect = shared.to.getBoundingClientRect();
  59         translateX = (toRect.left + (toRect.width / 2)) - (fromRect.left + (fromRect.width / 2));
  60         translateY = (toRect.top + (toRect.height / 2)) - (fromRect.top + (fromRect.height / 2));
  61       }
  62       var translate = 'translate(' + translateX + 'px,' + translateY + 'px)';
  63
  64       var size = Math.max(fromRect.width + Math.abs(translateX) * 2, fromRect.height + Math.abs(translateY) * 2);
  65       var diameter = Math.sqrt(2 * size * size);
  66       var scaleX = diameter / fromRect.width;
  67       var scaleY = diameter / fromRect.height;
  68       var scale = 'scale(' + scaleX + ',' + scaleY + ')';
  69
  70       this.setPrefixedProperty(shared.from, 'transformOrigin', '50% 50%');
  71       shared.from.style.borderRadius = '50%';
  72
  73       this._effect = new KeyframeEffect(shared.from, [
  74         {'transform': translate + ' ' + scale},
  75         {'transform': translate + ' scale(0)'}
  76       ], this.timingFromConfig(config));
  77       return this._effect;
  78     },
  79
  80     complete: function() {
  81       if (this.sharedElements) {
  82         this.setPrefixedProperty(this.sharedElements.from, 'transformOrigin', '');
  83         this.sharedElements.from.style.borderRadius = '';
  84       }
  85     }
  86   });
  87 </script>