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bower_components/paper-checkbox/paper-checkbox.html 7.87 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">
  <link rel="import" href="../paper-ripple/paper-ripple.html">
  <link rel="import" href="../paper-styles/default-theme.html">
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  <link rel="import" href="../paper-styles/color.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: [Checkbox](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-checkbox)
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  `paper-checkbox` is a button that can be either checked or unchecked.  User
  can tap the checkbox to check or uncheck it.  Usually you use checkboxes
  to allow user to select multiple options from a set.  If you have a single
  ON/OFF option, avoid using a single checkbox and use `paper-toggle-button`
  instead.
  
  Example:
  
      <paper-checkbox>label</paper-checkbox>
  
      <paper-checkbox checked> label</paper-checkbox>
  
  ### Styling
  
  The following custom properties and mixins are available for styling:
  
  Custom property | Description | Default
  ----------------|-------------|----------
  `--paper-checkbox-unchecked-background-color` | Checkbox background color when the input is not checked | `transparent`
  `--paper-checkbox-unchecked-color` | Checkbox border color when the input is not checked | `--primary-text-color`
  `--paper-checkbox-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color`
  `--paper-checkbox-checked-color` | Checkbox color when the input is checked | `--default-primary-color`
  `--paper-checkbox-checked-ink-color` | Selected/focus ripple color when the input is checked | `--default-primary-color`
  `--paper-checkbox-checkmark-color` | Checkmark color | `white`
  `--paper-checkbox-label-color` | Label color | `--primary-text-color`
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  `--paper-checkbox-label-spacing` | Spacing between the label and the checkbox | `8px`
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  `--paper-checkbox-error-color` | Checkbox color when invalid | `--google-red-500`
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  @demo demo/index.html
  -->
  
  <dom-module id="paper-checkbox">
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    <template strip-whitespace>
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      <style>
        :host {
          display: inline-block;
          white-space: nowrap;
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        }
  
        :host(:focus) {
          outline: none;
        }
  
        .hidden {
          display: none;
        }
  
        #checkboxContainer {
          display: inline-block;
          position: relative;
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          width: 18px;
          height: 18px;
          cursor: pointer;
          -webkit-transform: translateZ(0);
          transform: translateZ(0);
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          vertical-align: middle;
          background-color: var(--paper-checkbox-unchecked-background-color, transparent);
        }
  
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        #ink {
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          position: absolute;
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          top: -15px;
          left: -15px;
          width: 48px;
          height: 48px;
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          color: var(--paper-checkbox-unchecked-ink-color, --primary-text-color);
          opacity: 0.6;
          pointer-events: none;
        }
  
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        :host-context([dir="rtl"]) #ink {
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          right: -15px;
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          left: auto;
        }
  
        #ink[checked] {
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          color: var(--paper-checkbox-checked-ink-color, --default-primary-color);
        }
  
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        #checkbox {
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          position: relative;
          box-sizing: border-box;
          height: 100%;
          border: solid 2px;
          border-color: var(--paper-checkbox-unchecked-color, --primary-text-color);
          border-radius: 2px;
          pointer-events: none;
          -webkit-transition: background-color 140ms, border-color 140ms;
          transition: background-color 140ms, border-color 140ms;
        }
  
        /* checkbox checked animations */
        #checkbox.checked #checkmark {
          -webkit-animation: checkmark-expand 140ms ease-out forwards;
          animation: checkmark-expand 140ms ease-out forwards;
        }
  
        @-webkit-keyframes checkmark-expand {
          0% {
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            top: 9px;
            left: 6px;
            width: 0px;
            height: 0px;
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          }
          100% {
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            top: -1px;
            left: 4px;
            width: 5px;
            height: 10px;
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          }
        }
  
        @keyframes checkmark-expand {
          0% {
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            top: 9px;
            left: 6px;
            width: 0px;
            height: 0px;
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          }
          100% {
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            top: -1px;
            left: 4px;
            width: 5px;
            height: 10px;
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          }
        }
  
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        #checkbox.checked {
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          background-color: var(--paper-checkbox-checked-color, --default-primary-color);
          border-color: var(--paper-checkbox-checked-color, --default-primary-color);
        }
  
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        #checkmark {
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          -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
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          position: absolute;
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          top: -1px;
          left: 4px;
          width: 5px;
          height: 10px;
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          border-style: solid;
          border-top: none;
          border-left: none;
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          border-right-width: 2px;
          border-bottom-width: 2px;
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          border-color: var(--paper-checkbox-checkmark-color, white);
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        }
  
        /* label */
        #checkboxLabel {
          position: relative;
          display: inline-block;
          vertical-align: middle;
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          padding-left: var(--paper-checkbox-label-spacing, 8px);
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          white-space: normal;
          pointer-events: none;
          color: var(--paper-checkbox-label-color, --primary-text-color);
        }
  
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        :host-context([dir="rtl"]) #checkboxLabel {
          padding-right: var(--paper-checkbox-label-spacing, 8px);
          padding-left: 0;
        }
  
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        #checkboxLabel[hidden] {
          display: none;
        }
  
        /* disabled state */
        :host([disabled]) {
          pointer-events: none;
        }
  
        :host([disabled]) #checkbox {
          opacity: 0.5;
          border-color: var(--paper-checkbox-unchecked-color, --primary-text-color);
        }
  
        :host([disabled][checked]) #checkbox {
          background-color: var(--paper-checkbox-unchecked-color, --primary-text-color);
          opacity: 0.5;
        }
  
        :host([disabled]) #checkboxLabel  {
          opacity: 0.65;
        }
  
        /* invalid state */
        #checkbox.invalid:not(.checked) {
          border-color: var(--paper-checkbox-error-color, --google-red-500);
        }
      </style>
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      <div id="checkboxContainer">
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        <div id="checkbox" class$="[[_computeCheckboxClass(checked, invalid)]]">
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          <div id="checkmark" class$="[[_computeCheckmarkClass(checked)]]"></div>
        </div>
      </div>
  
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      <div id="checkboxLabel"><content></content></div>
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    </template>
  
    <script>
      Polymer({
        is: 'paper-checkbox',
  
        behaviors: [
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          Polymer.PaperCheckedElementBehavior
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        ],
  
        hostAttributes: {
          role: 'checkbox',
          'aria-checked': 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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          ariaActiveAttribute: {
            type: String,
            value: 'aria-checked'
          }
        },
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        _computeCheckboxClass: function(checked, invalid) {
          var className = '';
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          if (checked) {
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            className += 'checked ';
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          }
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          if (invalid) {
            className += 'invalid';
          }
          return className;
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        },
  
        _computeCheckmarkClass: function(checked) {
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          return checked ? '' : 'hidden';
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        },
  
        // create ripple inside the checkboxContainer
        _createRipple: function() {
          this._rippleContainer = this.$.checkboxContainer;
          return Polymer.PaperInkyFocusBehaviorImpl._createRipple.call(this);
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        }
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      });
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    </script>
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  </dom-module>