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| 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.g
ithub.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/CONTRI
BUTORS.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/PATEN
TS.txt | |
| 9 --> | |
| 10 | |
| 11 <link rel="import" href="../polymer/polymer.html"> | |
| 12 | |
| 13 <!-- | |
| 14 `iron-collapse` creates a collapsible block of content. By default, the content | |
| 15 will be collapsed. Use `opened` or `toggle()` to show/hide the content. | |
| 16 | |
| 17 <button on-click="{{toggle}}">toggle collapse</button> | |
| 18 | |
| 19 <iron-collapse id="collapse"> | |
| 20 <div>Content goes here...</div> | |
| 21 </iron-collapse> | |
| 22 | |
| 23 ... | |
| 24 | |
| 25 toggle: function() { | |
| 26 this.$.collapse.toggle(); | |
| 27 } | |
| 28 | |
| 29 `iron-collapse` adjusts the height/width of the collapsible element to show/hide | |
| 30 the content. So avoid putting padding/margin/border on the collapsible directly
, | |
| 31 and instead put a div inside and style that. | |
| 32 | |
| 33 <style> | |
| 34 .collapse-content { | |
| 35 padding: 15px; | |
| 36 border: 1px solid #dedede; | |
| 37 } | |
| 38 </style> | |
| 39 | |
| 40 <iron-collapse> | |
| 41 <div class="collapse-content"> | |
| 42 <div>Content goes here...</div> | |
| 43 </div> | |
| 44 </iron-collapse> | |
| 45 | |
| 46 @group Iron Elements | |
| 47 @hero hero.svg | |
| 48 @demo demo/index.html | |
| 49 @element iron-collapse | |
| 50 --> | |
| 51 | |
| 52 <dom-module id="iron-collapse"> | |
| 53 | |
| 54 <style> | |
| 55 | |
| 56 :host { | |
| 57 display: block; | |
| 58 transition-duration: 300ms; | |
| 59 } | |
| 60 | |
| 61 :host(.iron-collapse-closed) { | |
| 62 display: none; | |
| 63 } | |
| 64 | |
| 65 :host(:not(.iron-collapse-opened)) { | |
| 66 overflow: hidden; | |
| 67 } | |
| 68 | |
| 69 </style> | |
| 70 | |
| 71 <template> | |
| 72 | |
| 73 <content></content> | |
| 74 | |
| 75 </template> | |
| 76 | |
| 77 </dom-module> | |
| 78 | |
| 79 <script> | |
| 80 | |
| 81 Polymer({ | |
| 82 | |
| 83 is: 'iron-collapse', | |
| 84 | |
| 85 properties: { | |
| 86 | |
| 87 /** | |
| 88 * If true, the orientation is horizontal; otherwise is vertical. | |
| 89 * | |
| 90 * @attribute horizontal | |
| 91 */ | |
| 92 horizontal: { | |
| 93 type: Boolean, | |
| 94 value: false, | |
| 95 observer: '_horizontalChanged' | |
| 96 }, | |
| 97 | |
| 98 /** | |
| 99 * Set opened to true to show the collapse element and to false to hide it
. | |
| 100 * | |
| 101 * @attribute opened | |
| 102 */ | |
| 103 opened: { | |
| 104 type: Boolean, | |
| 105 value: false, | |
| 106 notify: true, | |
| 107 observer: '_openedChanged' | |
| 108 } | |
| 109 | |
| 110 }, | |
| 111 | |
| 112 hostAttributes: { | |
| 113 role: 'group', | |
| 114 'aria-expanded': 'false', | |
| 115 tabindex: 0 | |
| 116 }, | |
| 117 | |
| 118 listeners: { | |
| 119 transitionend: '_transitionEnd' | |
| 120 }, | |
| 121 | |
| 122 ready: function() { | |
| 123 // Avoid transition at the beginning e.g. page loads and enable | |
| 124 // transitions only after the element is rendered and ready. | |
| 125 this._enableTransition = true; | |
| 126 }, | |
| 127 | |
| 128 /** | |
| 129 * Toggle the opened state. | |
| 130 * | |
| 131 * @method toggle | |
| 132 */ | |
| 133 toggle: function() { | |
| 134 this.opened = !this.opened; | |
| 135 }, | |
| 136 | |
| 137 show: function() { | |
| 138 this.toggleClass('iron-collapse-closed', false); | |
| 139 this.updateSize('auto', false); | |
| 140 var s = this._calcSize(); | |
| 141 this.updateSize('0px', false); | |
| 142 // force layout to ensure transition will go | |
| 143 this.offsetHeight; | |
| 144 this.updateSize(s, true); | |
| 145 }, | |
| 146 | |
| 147 hide: function() { | |
| 148 this.toggleClass('iron-collapse-opened', false); | |
| 149 this.updateSize(this._calcSize(), false); | |
| 150 // force layout to ensure transition will go | |
| 151 this.offsetHeight; | |
| 152 this.updateSize('0px', true); | |
| 153 }, | |
| 154 | |
| 155 updateSize: function(size, animated) { | |
| 156 this.enableTransition(animated); | |
| 157 var s = this.style; | |
| 158 var nochange = s[this.dimension] === size; | |
| 159 s[this.dimension] = size; | |
| 160 if (animated && nochange) { | |
| 161 this._transitionEnd(); | |
| 162 } | |
| 163 }, | |
| 164 | |
| 165 enableTransition: function(enabled) { | |
| 166 this.style.transitionDuration = (enabled && this._enableTransition) ? '' :
'0s'; | |
| 167 }, | |
| 168 | |
| 169 _horizontalChanged: function() { | |
| 170 this.dimension = this.horizontal ? 'width' : 'height'; | |
| 171 this.style.transitionProperty = this.dimension; | |
| 172 }, | |
| 173 | |
| 174 _openedChanged: function() { | |
| 175 this[this.opened ? 'show' : 'hide'](); | |
| 176 this.setAttribute('aria-expanded', this.opened ? 'true' : 'false'); | |
| 177 | |
| 178 }, | |
| 179 | |
| 180 _transitionEnd: function() { | |
| 181 if (this.opened) { | |
| 182 this.updateSize('auto', false); | |
| 183 } | |
| 184 this.toggleClass('iron-collapse-closed', !this.opened); | |
| 185 this.toggleClass('iron-collapse-opened', this.opened); | |
| 186 this.enableTransition(false); | |
| 187 }, | |
| 188 | |
| 189 _calcSize: function() { | |
| 190 return this.getBoundingClientRect()[this.dimension] + 'px'; | |
| 191 }, | |
| 192 | |
| 193 | |
| 194 }); | |
| 195 | |
| 196 </script> | |
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Chromium Code Reviews
Issue 1155683008:
Rename polymer and cr_elements v0_8 to v1_0 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@v1