third_party/polymer/v1_0/components/neon-animation/animations/hero-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 <link rel="import" href="../../polymer/polymer.html">
  12 <link rel="import" href="../neon-shared-element-animation-behavior.html">
  13 <link rel="import" href="../web-animations.html">
  14
  15 <!--
  16 `<hero-animation>` is a shared element animation that scales and transform an element such that it
  17 appears to be shared between two pages. Use this in `<neon-animated-pages>`. The source page
  18 should use this animation in an 'exit' animation and set the `fromPage` configuration property to
  19 itself, and the destination page should use this animation in an `entry` animation and set the
  20 `toPage` configuration property to itself. They should also define the hero elements in the
  21 `sharedElements` property (not a configuration property, see
  22 `Polymer.NeonSharedElementAnimatableBehavior`).
  23
  24 Configuration:
  25 ```
  26 {
  27   name: 'hero-animation',
  28   id: <shared-element-id>,
  29   timing: <animation-timing>,
  30   toPage: <node>, /* define for the destination page */
  31   fromPage: <node>, /* define for the source page */
  32 }
  33 ```
  34 -->
  35
  36 <script>
  37
  38   Polymer({
  39
  40     is: 'hero-animation',
  41
  42     behaviors: [
  43       Polymer.NeonSharedElementAnimationBehavior
  44     ],
  45
  46     configure: function(config) {
  47       var shared = this.findSharedElements(config);
  48       if (!shared) {
  49         return;
  50       }
  51
  52       var fromRect = shared.from.getBoundingClientRect();
  53       var toRect = shared.to.getBoundingClientRect();
  54
  55       var deltaLeft = fromRect.left - toRect.left;
  56       var deltaTop = fromRect.top - toRect.top;
  57       var deltaWidth = fromRect.width / toRect.width;
  58       var deltaHeight = fromRect.height / toRect.height;
  59
  60       this.setPrefixedProperty(shared.to, 'transformOrigin', '0 0');
  61       shared.to.style.zIndex = 10000;
  62       shared.from.style.visibility = 'hidden';
  63
  64       this._effect = new KeyframeEffect(shared.to, [
  65         {'transform': 'translate(' + deltaLeft + 'px,' + deltaTop + 'px) scale(' + deltaWidth + ',' + deltaHeight + ')'},
  66         {'transform': 'none'}
  67       ], this.timingFromConfig(config));
  68
  69       return this._effect;
  70     },
  71
  72     complete: function(config) {
  73       var shared = this.findSharedElements(config);
  74       if (!shared) {
  75         return null;
  76       }
  77       shared.to.style.zIndex = '';
  78       shared.from.style.visibility = '';
  79     }
  80
  81   });
  82
  83 </script>