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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 <script> | |
| 14 /** | |
| 15 * `IronResizableBehavior` is a behavior that can be used in Polymer elements
to | |
| 16 * coordinate the flow of resize events between "resizers" (elements that cont
rol the | |
| 17 * size or hidden state of their children) and "resizables" (elements that nee
d to be | |
| 18 * notified when they are resized or un-hidden by their parents in order to ta
ke | |
| 19 * action on their new measurements). | |
| 20 * Elements that perform measurement should add the `IronResizableBehavior` be
havior to | |
| 21 * their element definition and listen for the `iron-resize` event on themselv
es. | |
| 22 * This event will be fired when they become showing after having been hidden, | |
| 23 * when they are resized explicitly by another resizable, or when the window h
as been | |
| 24 * resized. | |
| 25 * Note, the `iron-resize` event is non-bubbling. | |
| 26 * | |
| 27 * @polymerBehavior Polymer.IronResizableBehavior | |
| 28 * @demo demo/index.html | |
| 29 **/ | |
| 30 Polymer.IronResizableBehavior = { | |
| 31 properties: { | |
| 32 _parentResizable: { | |
| 33 type: Object, | |
| 34 observer: '_parentResizableChanged' | |
| 35 } | |
| 36 }, | |
| 37 | |
| 38 listeners: { | |
| 39 'iron-request-resize-notifications': '_onIronRequestResizeNotifications' | |
| 40 }, | |
| 41 | |
| 42 created: function() { | |
| 43 // We don't really need property effects on these, and also we want them | |
| 44 // to be created before the `_parentResizable` observer fires: | |
| 45 this._interestedResizables = []; | |
| 46 this._boundNotifyResize = this.notifyResize.bind(this); | |
| 47 }, | |
| 48 | |
| 49 attached: function() { | |
| 50 this.fire('iron-request-resize-notifications', null, { | |
| 51 node: this, | |
| 52 bubbles: true | |
| 53 }); | |
| 54 | |
| 55 if (!this._parentResizable) { | |
| 56 window.addEventListener('resize', this._boundNotifyResize); | |
| 57 this.notifyResize(); | |
| 58 } | |
| 59 }, | |
| 60 | |
| 61 detached: function() { | |
| 62 if (this._parentResizable) { | |
| 63 this._parentResizable.stopResizeNotificationsFor(this); | |
| 64 } else { | |
| 65 window.removeEventListener('resize', this._boundNotifyResize); | |
| 66 } | |
| 67 | |
| 68 this._parentResizable = null; | |
| 69 }, | |
| 70 | |
| 71 /** | |
| 72 * Can be called to manually notify a resizable and its descendant | |
| 73 * resizables of a resize change. | |
| 74 */ | |
| 75 notifyResize: function() { | |
| 76 if (!this.isAttached) { | |
| 77 return; | |
| 78 } | |
| 79 | |
| 80 this._interestedResizables.forEach(function(resizable) { | |
| 81 // TODO(cdata): Currently behaviors cannot define "abstract" methods.. | |
| 82 if (!this.resizerShouldNotify || this.resizerShouldNotify(resizable)) { | |
| 83 resizable.notifyResize(); | |
| 84 } | |
| 85 }, this); | |
| 86 | |
| 87 this.fire('iron-resize', null, { | |
| 88 node: this, | |
| 89 bubbles: false | |
| 90 }); | |
| 91 }, | |
| 92 | |
| 93 /** | |
| 94 * Used to assign the closest resizable ancestor to this resizable | |
| 95 * if the ancestor detects a request for notifications. | |
| 96 */ | |
| 97 assignParentResizable: function(parentResizable) { | |
| 98 this._parentResizable = parentResizable; | |
| 99 }, | |
| 100 | |
| 101 /** | |
| 102 * Used to remove a resizable descendant from the list of descendants | |
| 103 * that should be notified of a resize change. | |
| 104 */ | |
| 105 stopResizeNotificationsFor: function(target) { | |
| 106 var index = this._interestedResizables.indexOf(target); | |
| 107 | |
| 108 if (index > -1) { | |
| 109 this._interestedResizables.splice(index, 1); | |
| 110 } | |
| 111 }, | |
| 112 | |
| 113 // TODO(cdata): Currently behaviors cannot define "abstract" methods. | |
| 114 // resizerShouldNotify: function(el) { return true; }, | |
| 115 | |
| 116 _parentResizableChanged: function(parentResizable) { | |
| 117 if (parentResizable) { | |
| 118 window.removeEventListener('resize', this._boundNotifyResize); | |
| 119 } | |
| 120 }, | |
| 121 | |
| 122 _onIronRequestResizeNotifications: function(event) { | |
| 123 var target = event.path ? event.path[0] : event.target; | |
| 124 | |
| 125 if (target === this) { | |
| 126 return; | |
| 127 } | |
| 128 | |
| 129 if (this._interestedResizables.indexOf(target) === -1) { | |
| 130 this._interestedResizables.push(target); | |
| 131 } | |
| 132 | |
| 133 target.assignParentResizable(this); | |
| 134 | |
| 135 event.stopPropagation(); | |
| 136 } | |
| 137 }; | |
| 138 </script> | |
| 139 | |
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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