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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 <link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html
"> | |
| 13 <link rel="import" href="iron-control-state.html"> | |
| 14 | |
| 15 <script> | |
| 16 | |
| 17 /** | |
| 18 * @demo demo/index.html | |
| 19 * @polymerBehavior Polymer.IronButtonState | |
| 20 */ | |
| 21 Polymer.IronButtonStateImpl = { | |
| 22 | |
| 23 properties: { | |
| 24 | |
| 25 /** | |
| 26 * If true, the user is currently holding down the button. | |
| 27 */ | |
| 28 pressed: { | |
| 29 type: Boolean, | |
| 30 readOnly: true, | |
| 31 value: false, | |
| 32 reflectToAttribute: true, | |
| 33 observer: '_pressedChanged' | |
| 34 }, | |
| 35 | |
| 36 /** | |
| 37 * If true, the button toggles the active state with each tap or press | |
| 38 * of the spacebar. | |
| 39 */ | |
| 40 toggles: { | |
| 41 type: Boolean, | |
| 42 value: false, | |
| 43 reflectToAttribute: true | |
| 44 }, | |
| 45 | |
| 46 /** | |
| 47 * If true, the button is a toggle and is currently in the active state. | |
| 48 */ | |
| 49 active: { | |
| 50 type: Boolean, | |
| 51 value: false, | |
| 52 notify: true, | |
| 53 reflectToAttribute: true, | |
| 54 observer: '_activeChanged' | |
| 55 }, | |
| 56 | |
| 57 /** | |
| 58 * True if the element is currently being pressed by a "pointer," which | |
| 59 * is loosely defined as mouse or touch input (but specifically excluding | |
| 60 * keyboard input). | |
| 61 */ | |
| 62 pointerDown: { | |
| 63 type: Boolean, | |
| 64 readOnly: true, | |
| 65 value: false | |
| 66 }, | |
| 67 | |
| 68 /** | |
| 69 * True if the input device that caused the element to receive focus | |
| 70 * was a keyboard. | |
| 71 */ | |
| 72 receivedFocusFromKeyboard: { | |
| 73 type: Boolean, | |
| 74 readOnly: true | |
| 75 } | |
| 76 }, | |
| 77 | |
| 78 listeners: { | |
| 79 down: '_downHandler', | |
| 80 up: '_upHandler', | |
| 81 tap: '_tapHandler' | |
| 82 }, | |
| 83 | |
| 84 observers: [ | |
| 85 '_detectKeyboardFocus(focused)' | |
| 86 ], | |
| 87 | |
| 88 keyBindings: { | |
| 89 'enter:keydown': '_asyncClick', | |
| 90 'space:keydown': '_spaceKeyDownHandler', | |
| 91 'space:keyup': '_spaceKeyUpHandler', | |
| 92 }, | |
| 93 | |
| 94 _tapHandler: function() { | |
| 95 if (this.toggles) { | |
| 96 // a tap is needed to toggle the active state | |
| 97 this._userActivate(!this.active); | |
| 98 } else { | |
| 99 this.active = false; | |
| 100 } | |
| 101 }, | |
| 102 | |
| 103 _detectKeyboardFocus: function(focused) { | |
| 104 this._setReceivedFocusFromKeyboard(!this.pointerDown && focused); | |
| 105 }, | |
| 106 | |
| 107 // to emulate native checkbox, (de-)activations from a user interaction fire | |
| 108 // 'change' events | |
| 109 _userActivate: function(active) { | |
| 110 this.active = active; | |
| 111 this.fire('change'); | |
| 112 }, | |
| 113 | |
| 114 _downHandler: function() { | |
| 115 this._setPointerDown(true); | |
| 116 this._setPressed(true); | |
| 117 this._setReceivedFocusFromKeyboard(false); | |
| 118 }, | |
| 119 | |
| 120 _upHandler: function() { | |
| 121 this._setPointerDown(false); | |
| 122 this._setPressed(false); | |
| 123 }, | |
| 124 | |
| 125 _spaceKeyDownHandler: function(event) { | |
| 126 var keyboardEvent = event.detail.keyboardEvent; | |
| 127 keyboardEvent.preventDefault(); | |
| 128 keyboardEvent.stopImmediatePropagation(); | |
| 129 this._setPressed(true); | |
| 130 }, | |
| 131 | |
| 132 _spaceKeyUpHandler: function() { | |
| 133 if (this.pressed) { | |
| 134 this._asyncClick(); | |
| 135 } | |
| 136 this._setPressed(false); | |
| 137 }, | |
| 138 | |
| 139 // trigger click asynchronously, the asynchrony is useful to allow one | |
| 140 // event handler to unwind before triggering another event | |
| 141 _asyncClick: function() { | |
| 142 this.async(function() { | |
| 143 this.click(); | |
| 144 }, 1); | |
| 145 }, | |
| 146 | |
| 147 // any of these changes are considered a change to button state | |
| 148 | |
| 149 _pressedChanged: function(pressed) { | |
| 150 this._changedButtonState(); | |
| 151 }, | |
| 152 | |
| 153 _activeChanged: function(active) { | |
| 154 if (this.toggles) { | |
| 155 this.setAttribute('aria-pressed', active ? 'true' : 'false'); | |
| 156 } else { | |
| 157 this.removeAttribute('aria-pressed'); | |
| 158 } | |
| 159 this._changedButtonState(); | |
| 160 }, | |
| 161 | |
| 162 _controlStateChanged: function() { | |
| 163 if (this.disabled) { | |
| 164 this._setPressed(false); | |
| 165 } else { | |
| 166 this._changedButtonState(); | |
| 167 } | |
| 168 }, | |
| 169 | |
| 170 // provide hook for follow-on behaviors to react to button-state | |
| 171 | |
| 172 _changedButtonState: function() { | |
| 173 if (this._buttonStateChanged) { | |
| 174 this._buttonStateChanged(); // abstract | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 }; | |
| 179 | |
| 180 /** @polymerBehavior */ | |
| 181 Polymer.IronButtonState = [ | |
| 182 Polymer.IronA11yKeysBehavior, | |
| 183 Polymer.IronButtonStateImpl | |
| 184 ]; | |
| 185 | |
| 186 </script> | |
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Chromium Code Reviews
Issue 1269803005:
Remove third_party/polymer from .gitignore (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master