third_party/polymer/components/paper-toggle-button/paper-toggle-button.html

   1 <!--
   2 Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
   3 This code may only be used under the BSD style license found at http://polymer.github.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/CONTRIBUTORS.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/PATENTS.txt
   8 -->
   9
  10 <!--
  11 `paper-toggle-button` provides a ON/OFF switch that user can toggle the state
  12 by tapping or by dragging the swtich.
  13
  14 Example:
  15
  16     <paper-toggle-button></paper-toggle-button>
  17
  18 Styling toggle button:
  19
  20 To change the ink color for checked state:
  21
  22     paper-toggle-button::shadow paper-radio-button::shadow #ink[checked] {
  23       color: #4285f4;
  24     }
  25
  26 To change the radio checked color:
  27
  28     paper-toggle-button::shadow paper-radio-button::shadow #onRadio {
  29       background-color: #4285f4;
  30     }
  31
  32 To change the bar color for checked state:
  33
  34     paper-toggle-button::shadow #toggleBar[checked] {
  35       background-color: #4285f4;
  36     }
  37
  38 To change the ink color for unchecked state:
  39
  40     paper-toggle-button::shadow paper-radio-button::shadow #ink {
  41       color: #b5b5b5;
  42     }
  43
  44 To change the radio unchecked color:
  45
  46     paper-toggle-button::shadow paper-radio-button::shadow #offRadio {
  47       border-color: #b5b5b5;
  48     }
  49
  50 To change the bar color for unchecked state:
  51
  52     paper-toggle-button::shadow #toggleBar {
  53       background-color: red;
  54     }
  55
  56 @group Paper Elements
  57 @element paper-toggle-button
  58 @homepage github.io
  59 -->
  60
  61 <link rel="import" href="../paper-radio-button/paper-radio-button.html">
  62
  63 <polymer-element name="paper-toggle-button" attributes="checked disabled" role="button" aria-pressed="false" tabindex="0">
  64 <template>
  65
  66   <link rel="stylesheet" href="paper-toggle-button.css">
  67
  68   <div id="toggleContainer" disabled?="{{disabled}}">
  69
  70     <div id="toggleBar" checked?="{{checked}}"></div>
  71
  72     <paper-radio-button id="toggleRadio" toggles checked="{{checked}}" on-change="{{changeAction}}" on-core-change="{{stopPropagation}}"
  73         on-trackstart="{{trackStart}}" on-trackx="{{trackx}}" on-trackend="{{trackEnd}}"></paper-radio-button>
  74
  75   </div>
  76
  77 </template>
  78 <script>
  79
  80   Polymer('paper-toggle-button', {
  81
  82     /**
  83      * Fired when the checked state changes due to user interaction.
  84      *
  85      * @event change
  86      */
  87
  88     /**
  89      * Fired when the checked state changes.
  90      *
  91      * @event core-change
  92      */
  93
  94     /**
  95      * Gets or sets the state, `true` is checked and `false` is unchecked.
  96      *
  97      * @attribute checked
  98      * @type boolean
  99      * @default false
 100      */
 101     checked: false,
 102
 103     /**
 104      * If true, the toggle button is disabled.  A disabled toggle button cannot
 105      * be tapped or dragged to change the checked state.
 106      *
 107      * @attribute disabled
 108      * @type boolean
 109      * @default false
 110      */
 111     disabled: false,
 112
 113     trackStart: function(e) {
 114       this._w = this.$.toggleBar.offsetLeft + this.$.toggleBar.offsetWidth;
 115       e.preventTap();
 116     },
 117
 118     trackx: function(e) {
 119       this._x = Math.min(this._w,
 120           Math.max(0, this.checked ? this._w + e.dx : e.dx));
 121       this.$.toggleRadio.classList.add('dragging');
 122       var s =  this.$.toggleRadio.style;
 123       s.webkitTransform = s.transform = 'translate3d(' + this._x + 'px,0,0)';
 124     },
 125
 126     trackEnd: function() {
 127       var s =  this.$.toggleRadio.style;
 128       s.transform = s.webkitTransform = '';
 129       this.$.toggleRadio.classList.remove('dragging');
 130       var old = this.checked;
 131       this.checked = Math.abs(this._x) > this._w / 2;
 132       if (this.checked !== old) {
 133         this.fire('change');
 134       }
 135     },
 136
 137     checkedChanged: function() {
 138       this.setAttribute('aria-pressed', Boolean(this.checked));
 139       this.fire('core-change');
 140     },
 141
 142     changeAction: function(e) {
 143       e.stopPropagation();
 144       this.fire('change');
 145     },
 146
 147     stopPropagation: function(e) {
 148       e.stopPropagation();
 149     }
 150
 151   });
 152
 153 </script>
 154 </polymer-element>