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| 1 | |
| 2 | |
| 3 /** @polymerBehavior Polymer.IronButtonState */ | |
| 4 Polymer.IronButtonStateImpl = { | |
| 5 | |
| 6 properties: { | |
| 7 | |
| 8 /** | |
| 9 * If true, the user is currently holding down the button. | |
| 10 * | |
| 11 * @attribute pressed | |
| 12 * @type boolean | |
| 13 * @default false | |
| 14 */ | |
| 15 pressed: { | |
| 16 type: Boolean, | |
| 17 readOnly: true, | |
| 18 value: false, | |
| 19 reflectToAttribute: true, | |
| 20 observer: '_pressedChanged' | |
| 21 }, | |
| 22 | |
| 23 /** | |
| 24 * If true, the button toggles the active state with each tap or press | |
| 25 * of the spacebar. | |
| 26 * | |
| 27 * @attribute toggles | |
| 28 * @type boolean | |
| 29 * @default false | |
| 30 */ | |
| 31 toggles: { | |
| 32 type: Boolean, | |
| 33 value: false, | |
| 34 reflectToAttribute: true | |
| 35 }, | |
| 36 | |
| 37 /** | |
| 38 * If true, the button is a toggle and is currently in the active state. | |
| 39 * | |
| 40 * @attribute active | |
| 41 * @type boolean | |
| 42 * @default false | |
| 43 */ | |
| 44 active: { | |
| 45 type: Boolean, | |
| 46 value: false, | |
| 47 notify: true, | |
| 48 reflectToAttribute: true, | |
| 49 observer: '_activeChanged' | |
| 50 }, | |
| 51 | |
| 52 /** | |
| 53 * True if the element is currently being pressed by a "pointer," which | |
| 54 * is loosely defined as mouse or touch input (but specifically excluding | |
| 55 * keyboard input). | |
| 56 */ | |
| 57 pointerDown: { | |
| 58 type: Boolean, | |
| 59 readOnly: true, | |
| 60 value: false | |
| 61 }, | |
| 62 | |
| 63 /** | |
| 64 * True if the input device that caused the element to receive focus | |
| 65 * was a keyboard. | |
| 66 */ | |
| 67 receivedFocusFromKeyboard: { | |
| 68 type: Boolean, | |
| 69 readOnly: true | |
| 70 } | |
| 71 }, | |
| 72 | |
| 73 listeners: { | |
| 74 down: '_downHandler', | |
| 75 up: '_upHandler', | |
| 76 tap: '_tapHandler' | |
| 77 }, | |
| 78 | |
| 79 observers: [ | |
| 80 '_detectKeyboardFocus(focused)' | |
| 81 ], | |
| 82 | |
| 83 keyBindings: { | |
| 84 'enter:keydown': '_asyncClick', | |
| 85 'space:keydown': '_spaceKeyDownHandler', | |
| 86 'space:keyup': '_spaceKeyUpHandler', | |
| 87 }, | |
| 88 | |
| 89 _tapHandler: function() { | |
| 90 if (this.toggles) { | |
| 91 // a tap is needed to toggle the active state | |
| 92 this._userActivate(!this.active); | |
| 93 } else { | |
| 94 this.active = false; | |
| 95 } | |
| 96 }, | |
| 97 | |
| 98 _detectKeyboardFocus: function(focused) { | |
| 99 this._setReceivedFocusFromKeyboard(!this.pointerDown && focused); | |
| 100 }, | |
| 101 | |
| 102 // to emulate native checkbox, (de-)activations from a user interaction fire | |
| 103 // 'change' events | |
| 104 _userActivate: function(active) { | |
| 105 this.active = active; | |
| 106 this.fire('change'); | |
| 107 }, | |
| 108 | |
| 109 _downHandler: function() { | |
| 110 this._setPointerDown(true); | |
| 111 this._setPressed(true); | |
| 112 this._setReceivedFocusFromKeyboard(false); | |
| 113 }, | |
| 114 | |
| 115 _upHandler: function() { | |
| 116 this._setPointerDown(false); | |
| 117 this._setPressed(false); | |
| 118 }, | |
| 119 | |
| 120 _spaceKeyDownHandler: function(event) { | |
| 121 var keyboardEvent = event.detail.keyboardEvent; | |
| 122 keyboardEvent.preventDefault(); | |
| 123 keyboardEvent.stopImmediatePropagation(); | |
| 124 this._setPressed(true); | |
| 125 }, | |
| 126 | |
| 127 _spaceKeyUpHandler: function() { | |
| 128 if (this.pressed) { | |
| 129 this._asyncClick(); | |
| 130 } | |
| 131 this._setPressed(false); | |
| 132 }, | |
| 133 | |
| 134 // trigger click asynchronously, the asynchrony is useful to allow one | |
| 135 // event handler to unwind before triggering another event | |
| 136 _asyncClick: function() { | |
| 137 this.async(function() { | |
| 138 this.click(); | |
| 139 }, 1); | |
| 140 }, | |
| 141 | |
| 142 // any of these changes are considered a change to button state | |
| 143 | |
| 144 _pressedChanged: function(pressed) { | |
| 145 this._changedButtonState(); | |
| 146 }, | |
| 147 | |
| 148 _activeChanged: function(active) { | |
| 149 if (this.toggles) { | |
| 150 this.setAttribute('aria-pressed', active ? 'true' : 'false'); | |
| 151 } else { | |
| 152 this.removeAttribute('aria-pressed'); | |
| 153 } | |
| 154 this._changedButtonState(); | |
| 155 }, | |
| 156 | |
| 157 _controlStateChanged: function() { | |
| 158 if (this.disabled) { | |
| 159 this._setPressed(false); | |
| 160 } else { | |
| 161 this._changedButtonState(); | |
| 162 } | |
| 163 }, | |
| 164 | |
| 165 // provide hook for follow-on behaviors to react to button-state | |
| 166 | |
| 167 _changedButtonState: function() { | |
| 168 if (this._buttonStateChanged) { | |
| 169 this._buttonStateChanged(); // abstract | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 }; | |
| 174 | |
| 175 /** @polymerBehavior Polymer.IronButtonState */ | |
| 176 Polymer.IronButtonState = [ | |
| 177 Polymer.IronA11yKeysBehavior, | |
| 178 Polymer.IronButtonStateImpl | |
| 179 ]; | |
| 180 | |
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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