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bower_components/paper-toggle-button/paper-toggle-button.html 7.64 KB
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  <!--
  @license
  Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
  This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  Code distributed by Google as part of the polymer project is also
  subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  -->
  
  <link rel="import" href="../polymer/polymer.html">
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  <link rel="import" href="../paper-styles/color.html">
  <link rel="import" href="../paper-styles/default-theme.html">
  <link rel="import" href="../paper-ripple/paper-ripple.html">
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  <link rel="import" href="../paper-behaviors/paper-checked-element-behavior.html">
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  <!--
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  Material design: [Switch](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-switch)
  
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  `paper-toggle-button` provides a ON/OFF switch that user can toggle the state
  by tapping or by dragging the switch.
  
  Example:
  
      <paper-toggle-button></paper-toggle-button>
  
  ### Styling
  
  The following custom properties and mixins are available for styling:
  
  Custom property | Description | Default
  ----------------|-------------|----------
  `--paper-toggle-button-unchecked-bar-color` | Slider color when the input is not checked | `#000000`
  `--paper-toggle-button-unchecked-button-color` | Button color when the input is not checked | `--paper-grey-50`
  `--paper-toggle-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--dark-primary-color`
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  `--paper-toggle-button-checked-bar-color` | Slider button color when the input is checked | `--default-primary-color`
  `--paper-toggle-button-checked-button-color` | Button color when the input is checked | `--default-primary-color`
  `--paper-toggle-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--default-primary-color`
  `--paper-toggle-button-unchecked-bar` | Mixin applied to the slider when the input is not checked | `{}`
  `--paper-toggle-button-unchecked-button` | Mixin applied to the slider button when the input is not checked | `{}`
  `--paper-toggle-button-checked-bar` | Mixin applied to the slider when the input is checked | `{}`
  `--paper-toggle-button-checked-button` | Mixin applied to the slider button when the input is checked | `{}`
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  `--paper-toggle-button-label-color` | Label color | `--primary-text-color`
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  @group Paper Elements
  @element paper-toggle-button
  @hero hero.svg
  @demo demo/index.html
  -->
  
  <dom-module id="paper-toggle-button">
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    <template strip-whitespace>
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      <style>
        :host {
          display: inline-block;
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        }
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        :host([disabled]) {
          pointer-events: none;
        }
  
        :host(:focus) {
          outline:none;
        }
  
        .toggle-bar {
          position: absolute;
          height: 100%;
          width: 100%;
          border-radius: 8px;
          pointer-events: none;
          opacity: 0.4;
          transition: background-color linear .08s;
          background-color: var(--paper-toggle-button-unchecked-bar-color, #000000);
          @apply(--paper-toggle-button-unchecked-bar);
        }
  
        .toggle-button {
          position: absolute;
          top: -3px;
          height: 20px;
          width: 20px;
          border-radius: 50%;
          box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.6);
          transition: -webkit-transform linear .08s, background-color linear .08s;
          transition: transform linear .08s, background-color linear .08s;
          will-change: transform;
          background-color: var(--paper-toggle-button-unchecked-button-color, --paper-grey-50);
          @apply(--paper-toggle-button-unchecked-button);
        }
  
        .toggle-button.dragging {
          -webkit-transition: none;
          transition: none;
        }
  
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        :host([checked]:not([disabled])) .toggle-bar {
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          opacity: 0.5;
          background-color: var(--paper-toggle-button-checked-bar-color, --default-primary-color);
          @apply(--paper-toggle-button-checked-bar);
        }
  
        :host([disabled]) .toggle-bar {
          background-color: #000;
          opacity: 0.12;
        }
  
        :host([checked]) .toggle-button {
          -webkit-transform: translate(16px, 0);
          transform: translate(16px, 0);
        }
  
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        :host([checked]:not([disabled])) .toggle-button {
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          background-color: var(--paper-toggle-button-checked-button-color, --default-primary-color);
          @apply(--paper-toggle-button-checked-button);
        }
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        :host([disabled]) .toggle-button {
          background-color: #bdbdbd;
          opacity: 1;
        }
  
        .toggle-ink {
          position: absolute;
          top: -14px;
          left: -14px;
          width: 48px;
          height: 48px;
          opacity: 0.5;
          pointer-events: none;
          color: var(--paper-toggle-button-unchecked-ink-color, --primary-text-color);
        }
  
        :host([checked]) .toggle-ink {
          color: var(--paper-toggle-button-checked-ink-color, --default-primary-color);
        }
  
        .toggle-container {
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          display: inline-block;
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          position: relative;
          width: 36px;
          height: 14px;
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        }
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        .toggle-label {
          position: relative;
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          top: -2px;
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          display: inline-block;
          vertical-align: middle;
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          margin-left: 10px;
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          white-space: normal;
          pointer-events: none;
          color: var(--paper-toggle-button-label-color, --primary-text-color);
        }
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      </style>
  
      <div class="toggle-container">
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        <div id="toggleBar" class="toggle-bar"></div>
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        <div id="toggleButton" class="toggle-button"></div>
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      </div>
  
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      <div class="toggle-label"><content></content></div>
  
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    </template>
  
    <script>
      Polymer({
        is: 'paper-toggle-button',
  
        behaviors: [
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          Polymer.PaperCheckedElementBehavior
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        ],
  
        hostAttributes: {
          role: 'button',
          'aria-pressed': 'false',
          tabindex: 0
        },
  
        properties: {
          /**
           * Fired when the checked state changes due to user interaction.
           *
           * @event change
           */
          /**
           * Fired when the checked state changes.
           *
           * @event iron-change
           */
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        },
  
        listeners: {
          track: '_ontrack'
        },
  
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        _ontrack: function(event) {
          var track = event.detail;
          if (track.state === 'start') {
            this._trackStart(track);
          } else if (track.state === 'track') {
            this._trackMove(track);
          } else if (track.state === 'end') {
            this._trackEnd(track);
          }
        },
  
        _trackStart: function(track) {
          this._width = this.$.toggleBar.offsetWidth / 2;
          /*
           * keep an track-only check state to keep the dragging behavior smooth
           * while toggling activations
           */
          this._trackChecked = this.checked;
          this.$.toggleButton.classList.add('dragging');
        },
  
        _trackMove: function(track) {
          var dx = track.dx;
          this._x = Math.min(this._width,
              Math.max(0, this._trackChecked ? this._width + dx : dx));
          this.translate3d(this._x + 'px', 0, 0, this.$.toggleButton);
          this._userActivate(this._x > (this._width / 2));
        },
  
        _trackEnd: function(track) {
          this.$.toggleButton.classList.remove('dragging');
          this.transform('', this.$.toggleButton);
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        },
  
        // customize the element's ripple
        _createRipple: function() {
          this._rippleContainer = this.$.toggleButton;
          var ripple = Polymer.PaperRippleBehavior._createRipple();
          ripple.id = 'ink';
          ripple.setAttribute('recenters', '');
          ripple.classList.add('circle', 'toggle-ink');
          return ripple;
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        }
  
      });
    </script>
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  </dom-module>