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| 1 <!-- | |
| 2 Copyright (c) 2015 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 <link rel="import" href="../polymer/polymer.html"> | |
| 11 <link rel="import" href="iron-control-state.html"> | |
| 12 | |
| 13 <script> | |
| 14 | |
| 15 Polymer.IronButtonState = { | |
| 16 | |
| 17 properties: { | |
| 18 | |
| 19 /** | |
| 20 * If true, the user is currently holding down the button. | |
| 21 * | |
| 22 * @attribute pressed | |
| 23 * @type boolean | |
| 24 * @default false | |
| 25 */ | |
| 26 pressed: { | |
| 27 type: Boolean, | |
| 28 readOnly: true, | |
| 29 reflectToAttribute: true, | |
| 30 observer: '_pressedChanged' | |
| 31 }, | |
| 32 | |
| 33 /** | |
| 34 * If true, the button toggles the active state with each tap or press | |
| 35 * of the spacebar. | |
| 36 * | |
| 37 * @attribute toggles | |
| 38 * @type boolean | |
| 39 * @default false | |
| 40 */ | |
| 41 toggles: { | |
| 42 type: Boolean, | |
| 43 reflectToAttribute: true | |
| 44 }, | |
| 45 | |
| 46 /** | |
| 47 * If true, the button is a toggle and is currently in the active state. | |
| 48 * | |
| 49 * @attribute active | |
| 50 * @type boolean | |
| 51 * @default false | |
| 52 */ | |
| 53 active: { | |
| 54 type: Boolean, | |
| 55 notify: true, | |
| 56 reflectToAttribute: true, | |
| 57 observer: '_activeChanged' | |
| 58 } | |
| 59 | |
| 60 }, | |
| 61 | |
| 62 listeners: { | |
| 63 mousedown: '_downHandler', | |
| 64 mouseup: '_upHandler', | |
| 65 keydown: '_keyDownHandler', | |
| 66 keyup: '_keyUpHandler', | |
| 67 tap: '_tapHandler' | |
| 68 }, | |
| 69 | |
| 70 _tapHandler: function() { | |
| 71 if (this.toggles) { | |
| 72 // a tap is needed to toggle the active state | |
| 73 this._userActivate(!this.active); | |
| 74 } else { | |
| 75 this.active = false; | |
| 76 } | |
| 77 }, | |
| 78 | |
| 79 // to emulate native checkbox, (de-)activations from a user interaction fire | |
| 80 // 'change' events | |
| 81 _userActivate: function(active) { | |
| 82 this.active = active; | |
| 83 this.fire('change'); | |
| 84 }, | |
| 85 | |
| 86 _downHandler: function() { | |
| 87 this._setPressed(true); | |
| 88 }, | |
| 89 | |
| 90 _upHandler: function(e) { | |
| 91 this._setPressed(false); | |
| 92 }, | |
| 93 | |
| 94 _keyDownHandler: function(e) { | |
| 95 switch(e.keyCode) { | |
| 96 case this.keyCodes.ENTER_KEY: | |
| 97 this._asyncClick(); | |
| 98 break; | |
| 99 | |
| 100 case this.keyCodes.SPACE: | |
| 101 this._setPressed(true); | |
| 102 break; | |
| 103 | |
| 104 } | |
| 105 }, | |
| 106 | |
| 107 _keyUpHandler: function(e) { | |
| 108 if (e.keyCode == this.keyCodes.SPACE) { | |
| 109 if (this.pressed) { | |
| 110 this._asyncClick(); | |
| 111 } | |
| 112 this._setPressed(false); | |
| 113 } | |
| 114 }, | |
| 115 | |
| 116 // trigger click asynchronously, the asynchrony is useful to allow one | |
| 117 // event handler to unwind before triggering another event | |
| 118 _asyncClick: function() { | |
| 119 this.async(function() { | |
| 120 this.click(); | |
| 121 }, 1); | |
| 122 }, | |
| 123 | |
| 124 // any of these changes are considered a change to button state | |
| 125 | |
| 126 _pressedChanged: function(pressed) { | |
| 127 this._changedButtonState(); | |
| 128 }, | |
| 129 | |
| 130 _activeChanged: function(active) { | |
| 131 this.setAttribute('aria-pressed', active ? 'true' : 'false'); | |
| 132 this._changedButtonState(); | |
| 133 }, | |
| 134 | |
| 135 _controlStateChanged: function() { | |
| 136 if (this.disabled) { | |
| 137 this._setPressed(false); | |
| 138 this.active = false; | |
| 139 } else { | |
| 140 this._changedButtonState(); | |
| 141 } | |
| 142 }, | |
| 143 | |
| 144 // provide hook for follow-on behaviors to react to button-state | |
| 145 | |
| 146 _changedButtonState: function() { | |
| 147 if (this._buttonStateChanged) { | |
| 148 this._buttonStateChanged(); // abstract | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 }; | |
| 153 | |
| 154 </script> | |
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Chromium Code Reviews
Issue 1124053009:
Pull latest Polymer elements (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master