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| 1 <!-- | |
| 2 Copyright 2013 The Polymer Authors. All rights reserved. | |
| 3 Use of this source code is governed by a BSD-style | |
| 4 license that can be found in the LICENSE file. | |
| 5 --> | |
| 6 <!-- | |
| 7 /** | |
| 8 * @module Polymer Elements | |
| 9 */ | |
| 10 /** | |
| 11 * polymer-selector is used to manage a list of elements that can be selected. | |
| 12 * The attribute "selected" indicates which item element is being selected. | |
| 13 * The attribute "multi" indicates if multiple items can be selected at once. | |
| 14 * Tapping on the item element would fire "polymer-activate" event. Use | |
| 15 * "polymer-select" event to listen for selection changes. | |
| 16 * | |
| 17 * Example: | |
| 18 * | |
| 19 * <polymer-selector selected="0"> | |
| 20 * <div>Item 1</div> | |
| 21 * <div>Item 2</div> | |
| 22 * <div>Item 3</div> | |
| 23 * </polymer-selector> | |
| 24 * | |
| 25 * polymer-selector is not styled. So one needs to use "polymer-selected" CSS | |
| 26 * class to style the selected element. | |
| 27 * | |
| 28 * <style> | |
| 29 * .item.polymer-selected { | |
| 30 * background: #eee; | |
| 31 * } | |
| 32 * </style> | |
| 33 * ... | |
| 34 * <polymer-selector> | |
| 35 * <div class="item">Item 1</div> | |
| 36 * <div class="item">Item 2</div> | |
| 37 * <div class="item">Item 3</div> | |
| 38 * </polymer-selector> | |
| 39 * | |
| 40 * @class polymer-selector | |
| 41 */ | |
| 42 /** | |
| 43 * Fired when an item's selection state is changed. This event is fired both | |
| 44 * when an item is selected or deselected. The `isSelected` detail property | |
| 45 * contains the selection state. | |
| 46 * | |
| 47 * @event polymer-select | |
| 48 * @param {Object} detail | |
| 49 * @param {boolean} detail.isSelected true for selection and false for deselec
tion | |
| 50 * @param {Object} detail.item the item element | |
| 51 */ | |
| 52 /** | |
| 53 * Fired when an item element is tapped. | |
| 54 * | |
| 55 * @event polymer-activate | |
| 56 * @param {Object} detail | |
| 57 * @param {Object} detail.item the item element | |
| 58 */ | |
| 59 --> | |
| 60 <link rel="import" href="polymer-selection.html"> | |
| 61 | |
| 62 <polymer-element name="polymer-selector" | |
| 63 attributes="selected multi valueattr selectedClass selectedProperty selected
Item selectedModel selectedIndex notap target itemsSelector activateEvent"> | |
| 64 <template> | |
| 65 <polymer-selection id="selection" multi="{{multi}}" on-polymer-select="{{sel
ectionSelect}}"></polymer-selection> | |
| 66 <content id="items" select="*"></content> | |
| 67 </template> | |
| 68 <script> | |
| 69 Polymer('polymer-selector', { | |
| 70 /** | |
| 71 * Gets or sets the selected element. Default to use the index | |
| 72 * of the item element. | |
| 73 * | |
| 74 * If you want a specific attribute value of the element to be | |
| 75 * used instead of index, set "valueattr" to that attribute name. | |
| 76 * | |
| 77 * Example: | |
| 78 * | |
| 79 * <polymer-selector valueattr="label" selected="foo"> | |
| 80 * <div label="foo"></div> | |
| 81 * <div label="bar"></div> | |
| 82 * <div label="zot"></div> | |
| 83 * </polymer-selector> | |
| 84 * | |
| 85 * In multi-selection this should be an array of values. | |
| 86 * | |
| 87 * Example: | |
| 88 * | |
| 89 * <polymer-selector id="selector" valueattr="label" multi> | |
| 90 * <div label="foo"></div> | |
| 91 * <div label="bar"></div> | |
| 92 * <div label="zot"></div> | |
| 93 * </polymer-selector> | |
| 94 * | |
| 95 * this.$.selector.selected = ['foo', 'zot']; | |
| 96 * | |
| 97 * @attribute selected | |
| 98 * @type Object | |
| 99 * @default null | |
| 100 */ | |
| 101 selected: null, | |
| 102 /** | |
| 103 * If true, multiple selections are allowed. | |
| 104 * | |
| 105 * @attribute multi | |
| 106 * @type boolean | |
| 107 * @default false | |
| 108 */ | |
| 109 multi: false, | |
| 110 /** | |
| 111 * Specifies the attribute to be used for "selected" attribute. | |
| 112 * | |
| 113 * @attribute valueattr | |
| 114 * @type string | |
| 115 * @default 'name' | |
| 116 */ | |
| 117 valueattr: 'name', | |
| 118 /** | |
| 119 * Specifies the CSS class to be used to add to the selected element. | |
| 120 * | |
| 121 * @attribute selectedClass | |
| 122 * @type string | |
| 123 * @default 'polymer-selected' | |
| 124 */ | |
| 125 selectedClass: 'polymer-selected', | |
| 126 /** | |
| 127 * Specifies the property to be used to set on the selected element | |
| 128 * to indicate its active state. | |
| 129 * | |
| 130 * @attribute selectedProperty | |
| 131 * @type string | |
| 132 * @default 'active' | |
| 133 */ | |
| 134 selectedProperty: 'active', | |
| 135 /** | |
| 136 * Returns the currently selected element. In multi-selection this returns | |
| 137 * an array of selected elements. | |
| 138 * | |
| 139 * @attribute selectedItem | |
| 140 * @type Object | |
| 141 * @default null | |
| 142 */ | |
| 143 selectedItem: null, | |
| 144 /** | |
| 145 * In single selection, this returns the model associated with the | |
| 146 * selected element. | |
| 147 * | |
| 148 * @attribute selectedModel | |
| 149 * @type Object | |
| 150 * @default null | |
| 151 */ | |
| 152 selectedModel: null, | |
| 153 /** | |
| 154 * In single selection, this returns the selected index. | |
| 155 * | |
| 156 * @attribute selectedIndex | |
| 157 * @type number | |
| 158 * @default -1 | |
| 159 */ | |
| 160 selectedIndex: -1, | |
| 161 /** | |
| 162 * The target element that contains items. If this is not set | |
| 163 * polymer-selector is the container. | |
| 164 * | |
| 165 * @attribute target | |
| 166 * @type Object | |
| 167 * @default null | |
| 168 */ | |
| 169 target: null, | |
| 170 /** | |
| 171 * This can be used to query nodes from the target node to be used for | |
| 172 * selection items. Note this only works if the 'target' property is set. | |
| 173 * | |
| 174 * Example: | |
| 175 * | |
| 176 * <polymer-selector target="{{$.myForm}}" itemsSelector="input[type=r
adio]"></polymer-selector> | |
| 177 * <form id="myForm"> | |
| 178 * <label><input type="radio" name="color" value="red"> Red</label>
<br> | |
| 179 * <label><input type="radio" name="color" value="green"> Green</lab
el> <br> | |
| 180 * <label><input type="radio" name="color" value="blue"> Blue</label
> <br> | |
| 181 * <p>color = {{color}}</p> | |
| 182 * </form> | |
| 183 * | |
| 184 * @attribute itemSelector | |
| 185 * @type string | |
| 186 * @default '' | |
| 187 */ | |
| 188 itemsSelector: '', | |
| 189 /** | |
| 190 * The event that would be fired from the item element to indicate | |
| 191 * it is being selected. | |
| 192 * | |
| 193 * @attribute activateEvent | |
| 194 * @type string | |
| 195 * @default 'tap' | |
| 196 */ | |
| 197 activateEvent: 'tap', | |
| 198 notap: false, | |
| 199 ready: function() { | |
| 200 this.activateListener = this.activateHandler.bind(this); | |
| 201 this.observer = new MutationObserver(this.updateSelected.bind(this)); | |
| 202 if (!this.target) { | |
| 203 this.target = this; | |
| 204 } | |
| 205 }, | |
| 206 get items() { | |
| 207 var nodes = this.target !== this ? (this.itemsSelector ? | |
| 208 this.target.querySelectorAll(this.itemsSelector) : | |
| 209 this.target.children) : this.$.items.getDistributedNodes(); | |
| 210 return Array.prototype.filter.call(nodes || [], function(n) { | |
| 211 return n && n.localName !== 'template'; | |
| 212 }); | |
| 213 }, | |
| 214 targetChanged: function(old) { | |
| 215 if (old) { | |
| 216 this.removeListener(old); | |
| 217 this.observer.disconnect(); | |
| 218 } | |
| 219 if (this.target) { | |
| 220 this.addListener(this.target); | |
| 221 this.observer.observe(this.target, {childList: true}); | |
| 222 } | |
| 223 }, | |
| 224 addListener: function(node) { | |
| 225 node.addEventListener(this.activateEvent, this.activateListener); | |
| 226 }, | |
| 227 removeListener: function(node) { | |
| 228 node.removeEventListener(this.activateEvent, this.activateListener); | |
| 229 }, | |
| 230 get selection() { | |
| 231 return this.$.selection.getSelection(); | |
| 232 }, | |
| 233 selectedChanged: function() { | |
| 234 this.updateSelected(); | |
| 235 }, | |
| 236 updateSelected: function() { | |
| 237 this.validateSelected(); | |
| 238 if (this.multi) { | |
| 239 this.clearSelection(); | |
| 240 this.selected && this.selected.forEach(function(s) { | |
| 241 this.valueToSelection(s); | |
| 242 }, this); | |
| 243 } else { | |
| 244 this.valueToSelection(this.selected); | |
| 245 } | |
| 246 }, | |
| 247 validateSelected: function() { | |
| 248 // convert to an array for multi-selection | |
| 249 if (this.multi && !Array.isArray(this.selected) && | |
| 250 this.selected !== null && this.selected !== undefined) { | |
| 251 this.selected = [this.selected]; | |
| 252 } | |
| 253 }, | |
| 254 clearSelection: function() { | |
| 255 if (this.multi) { | |
| 256 this.selection.slice().forEach(function(s) { | |
| 257 this.$.selection.setItemSelected(s, false); | |
| 258 }, this); | |
| 259 } else { | |
| 260 this.$.selection.setItemSelected(this.selection, false); | |
| 261 } | |
| 262 this.selectedItem = null; | |
| 263 this.$.selection.clear(); | |
| 264 }, | |
| 265 valueToSelection: function(value) { | |
| 266 var item = (value === null || value === undefined) ? | |
| 267 null : this.items[this.valueToIndex(value)]; | |
| 268 this.$.selection.select(item); | |
| 269 }, | |
| 270 updateSelectedItem: function() { | |
| 271 this.selectedItem = this.selection; | |
| 272 }, | |
| 273 selectedItemChanged: function() { | |
| 274 if (this.selectedItem) { | |
| 275 var t = this.selectedItem.templateInstance; | |
| 276 this.selectedModel = t ? t.model : undefined; | |
| 277 } else { | |
| 278 this.selectedModel = null; | |
| 279 } | |
| 280 this.selectedIndex = this.selectedItem ? | |
| 281 parseInt(this.valueToIndex(this.selected)) : -1; | |
| 282 }, | |
| 283 valueToIndex: function(value) { | |
| 284 // find an item with value == value and return it's index | |
| 285 for (var i=0, items=this.items, c; (c=items[i]); i++) { | |
| 286 if (this.valueForNode(c) == value) { | |
| 287 return i; | |
| 288 } | |
| 289 } | |
| 290 // if no item found, the value itself is probably the index | |
| 291 return value; | |
| 292 }, | |
| 293 valueForNode: function(node) { | |
| 294 return node[this.valueattr] || node.getAttribute(this.valueattr); | |
| 295 }, | |
| 296 // events fired from <polymer-selection> object | |
| 297 selectionSelect: function(e, detail) { | |
| 298 this.updateSelectedItem(); | |
| 299 if (detail.item) { | |
| 300 this.applySelection(detail.item, detail.isSelected) | |
| 301 } | |
| 302 }, | |
| 303 applySelection: function(item, isSelected) { | |
| 304 if (this.selectedClass) { | |
| 305 item.classList.toggle(this.selectedClass, isSelected); | |
| 306 } | |
| 307 if (this.selectedProperty) { | |
| 308 item[this.selectedProperty] = isSelected; | |
| 309 } | |
| 310 }, | |
| 311 // event fired from host | |
| 312 activateHandler: function(e) { | |
| 313 if (!this.notap) { | |
| 314 var i = this.findDistributedTarget(e.target, this.items); | |
| 315 if (i >= 0) { | |
| 316 var item = this.items[i]; | |
| 317 var s = this.valueForNode(item) || i; | |
| 318 if (this.multi) { | |
| 319 if (this.selected) { | |
| 320 this.addRemoveSelected(s); | |
| 321 } else { | |
| 322 this.selected = [s]; | |
| 323 } | |
| 324 } else { | |
| 325 this.selected = s; | |
| 326 } | |
| 327 this.asyncFire('polymer-activate', {item: item}); | |
| 328 } | |
| 329 } | |
| 330 }, | |
| 331 addRemoveSelected: function(value) { | |
| 332 var i = this.selected.indexOf(value); | |
| 333 if (i >= 0) { | |
| 334 this.selected.splice(i, 1); | |
| 335 } else { | |
| 336 this.selected.push(value); | |
| 337 } | |
| 338 this.valueToSelection(value); | |
| 339 }, | |
| 340 findDistributedTarget: function(target, nodes) { | |
| 341 // find first ancestor of target (including itself) that | |
| 342 // is in nodes, if any | |
| 343 while (target && target != this) { | |
| 344 var i = Array.prototype.indexOf.call(nodes, target); | |
| 345 if (i >= 0) { | |
| 346 return i; | |
| 347 } | |
| 348 target = target.parentNode; | |
| 349 } | |
| 350 } | |
| 351 }); | |
| 352 </script> | |
| 353 </polymer-element> | |
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Issue 1576153002:
Remove the Dromaeo and TodoMVC samples. (Closed)
Base URL: git@github.com:dart-lang/sdk.git@master