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| 1 <!-- |
| 2 Copyright (c) 2014 The Polymer Project Authors. All rights reserved. |
| 3 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt |
| 4 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt |
| 5 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt |
| 6 Code distributed by Google as part of the polymer project is also |
| 7 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt |
| 8 --> |
| 9 |
| 10 <!-- |
| 11 `core-header-panel` contains a header section and a content panel section. |
| 12 |
| 13 __Important:__ The `core-header-panel` will not display if its parent does not h
ave a height. |
| 14 |
| 15 Using [layout attributes](http://www.polymer-project.org/docs/polymer/layout-att
rs.html), you can easily make the `core-header-panel` fill the screen |
| 16 |
| 17 <body fullbleed layout vertical> |
| 18 <core-header-panel flex> |
| 19 <core-toolbar> |
| 20 <div>Hello World!</div> |
| 21 </core-toolbar> |
| 22 </core-header-panel> |
| 23 </body> |
| 24 |
| 25 or, if you would prefer to do it in CSS, just give `html`, `body`, and `core-hea
der-panel` a height of 100%: |
| 26 |
| 27 html, body { |
| 28 height: 100%; |
| 29 margin: 0; |
| 30 } |
| 31 core-header-panel { |
| 32 height: 100%; |
| 33 } |
| 34 |
| 35 Special support is provided for scrolling modes when one uses a core-toolbar or
equivalent |
| 36 for the header section. |
| 37 |
| 38 Example: |
| 39 |
| 40 <core-header-panel> |
| 41 <core-toolbar>Header</core-toolbar> |
| 42 <div>Content goes here...</div> |
| 43 </core-header-panel> |
| 44 |
| 45 If you want to use other than `core-toolbar` for the header, add |
| 46 `core-header` class to that element. |
| 47 |
| 48 Example: |
| 49 |
| 50 <core-header-panel> |
| 51 <div class="core-header">Header</div> |
| 52 <div>Content goes here...</div> |
| 53 </core-header-panel> |
| 54 |
| 55 To have the content fits to the main area, use `fit` attribute. |
| 56 |
| 57 <core-header-panel> |
| 58 <div class="core-header">standard</div> |
| 59 <div class="content" fit>content fits 100% below the header</div> |
| 60 </core-header-panel> |
| 61 |
| 62 Use `mode` to control the header and scrolling behavior. |
| 63 |
| 64 @group Polymer Core Elements |
| 65 @element core-header-panel |
| 66 @homepage github.io |
| 67 --> |
| 68 |
| 69 <link rel="import" href="../polymer/polymer.html"> |
| 70 |
| 71 <polymer-element name="core-header-panel"> |
| 72 <template> |
| 73 |
| 74 <link rel="stylesheet" href="core-header-panel.css"> |
| 75 |
| 76 <div id="outerContainer" on-scroll="{{scroll}}" vertical layout> |
| 77 |
| 78 <content id="headerContent" select="core-toolbar, .core-header"></content> |
| 79 |
| 80 <div id="mainPanel" flex vertical layout> |
| 81 |
| 82 <div id="mainContainer" flex?="{{mode !== 'cover'}}" on-scroll="{{scroll}}
"> |
| 83 <content id="mainContent" select="*"></content> |
| 84 </div> |
| 85 |
| 86 <div id="dropShadow"></div> |
| 87 |
| 88 </div> |
| 89 |
| 90 </div> |
| 91 |
| 92 </template> |
| 93 <script> |
| 94 |
| 95 Polymer('core-header-panel', { |
| 96 |
| 97 /** |
| 98 * Fired when the content has been scrolled. `details.target` returns |
| 99 * the scrollable element which you can use to access scroll info such as |
| 100 * `scrollTop`. |
| 101 * |
| 102 * @event scroll |
| 103 */ |
| 104 |
| 105 publish: { |
| 106 /** |
| 107 * Controls header and scrolling behavior. Options are |
| 108 * `standard`, `seamed`, `waterfall`, `waterfall-tall`, |
| 109 * `waterfall-medium-tall`, `scroll` and `cover`. |
| 110 * Default is `standard`. |
| 111 * |
| 112 * `standard`: The header is a step above the panel. The header will consu
me the |
| 113 * panel at the point of entry, preventing it from passing through to the |
| 114 * opposite side. |
| 115 * |
| 116 * `seamed`: The header is presented as seamed with the panel. |
| 117 * |
| 118 * `waterfall`: Similar to standard mode, but header is initially presente
d as |
| 119 * seamed with panel, but then separates to form the step. |
| 120 * |
| 121 * `waterfall-tall`: The header is initially taller (`tall` class is added
to |
| 122 * the header). As the user scrolls, the header separates (forming an edg
e) |
| 123 * while condensing (`tall` class is removed from the header). |
| 124 * |
| 125 * `scroll`: The header keeps its seam with the panel, and is pushed off s
creen. |
| 126 * |
| 127 * `cover`: The panel covers the whole `core-header-panel` including the |
| 128 * header. This allows user to style the panel in such a way that the pane
l is |
| 129 * partially covering the header. |
| 130 * |
| 131 * <style> |
| 132 * core-header-panel[mode=cover]::shadow #mainContainer { |
| 133 * left: 80px; |
| 134 * } |
| 135 * .content { |
| 136 * margin: 60px 60px 60px 0; |
| 137 * } |
| 138 * </style> |
| 139 * |
| 140 * <core-header-panel mode="cover"> |
| 141 * <core-appbar class="tall"> |
| 142 * <core-icon-button icon="menu"></core-icon-button> |
| 143 * </core-appbar> |
| 144 * <div class="content"></div> |
| 145 * </core-header-panel> |
| 146 * |
| 147 * @attribute mode |
| 148 * @type string |
| 149 * @default '' |
| 150 */ |
| 151 mode: {value: '', reflect: true}, |
| 152 |
| 153 /** |
| 154 * The class used in waterfall-tall mode. Change this if the header |
| 155 * accepts a different class for toggling height, e.g. "medium-tall" |
| 156 * |
| 157 * @attribute tallClass |
| 158 * @type string |
| 159 * @default 'tall' |
| 160 */ |
| 161 tallClass: 'tall', |
| 162 |
| 163 /** |
| 164 * If true, the drop-shadow is always shown no matter what mode is set to. |
| 165 * |
| 166 * @attribute shadow |
| 167 * @type boolean |
| 168 * @default false |
| 169 */ |
| 170 shadow: false |
| 171 }, |
| 172 |
| 173 domReady: function() { |
| 174 this.async('scroll'); |
| 175 }, |
| 176 |
| 177 modeChanged: function() { |
| 178 this.scroll(); |
| 179 }, |
| 180 |
| 181 get header() { |
| 182 return this.$.headerContent.getDistributedNodes()[0]; |
| 183 }, |
| 184 |
| 185 /** |
| 186 * Returns the scrollable element. |
| 187 * |
| 188 * @property scroller |
| 189 * @type Object |
| 190 */ |
| 191 get scroller() { |
| 192 return this.mode === 'scroll' ? |
| 193 this.$.outerContainer : this.$.mainContainer; |
| 194 }, |
| 195 |
| 196 scroll: function() { |
| 197 var shadowMode = {'waterfall': 1, 'waterfall-tall': 1}; |
| 198 var noShadow = {'seamed': 1, 'cover': 1, 'scroll': 1}; |
| 199 var tallMode = {'waterfall-tall': 1}; |
| 200 |
| 201 var main = this.$.mainContainer; |
| 202 var header = this.header; |
| 203 |
| 204 var sTop = main.scrollTop; |
| 205 var atTop = sTop === 0; |
| 206 |
| 207 if (header) { |
| 208 this.$.dropShadow.classList.toggle('hidden', !this.shadow && |
| 209 (atTop && shadowMode[this.mode] || noShadow[this.mode])); |
| 210 |
| 211 if (tallMode[this.mode]) { |
| 212 header.classList.toggle(this.tallClass, atTop || |
| 213 main.scrollHeight < this.$.outerContainer.offsetHeight); |
| 214 } |
| 215 |
| 216 header.classList.toggle('animate', tallMode[this.mode]); |
| 217 } |
| 218 |
| 219 this.fire('scroll', {target: this.scroller}, this, false); |
| 220 } |
| 221 |
| 222 }); |
| 223 |
| 224 </script> |
| 225 </polymer-element> |
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Chromium Code Reviews
Issue 582873003:
Polymer elements added to third_party/polymer. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master