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bower_components/paper-listbox/paper-listbox.html 3.12 KB
a1a3bc73   Luigi Serra   graphs updates
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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="../iron-menu-behavior/iron-menu-behavior.html">
  <link rel="import" href="../paper-styles/default-theme.html">
  
  <!--
  Material design: [Menus](https://www.google.com/design/spec/components/menus.html)
  
  `<paper-listbox>` implements an accessible listbox control with Material Design styling. The focused item
  is highlighted, and the selected item has bolded text.
  
      <paper-listbox>
        <paper-item>Item 1</paper-item>
        <paper-item>Item 2</paper-item>
      </paper-listbox>
  
  An initial selection can be specified with the `selected` attribute.
  
      <paper-listbox selected="0">
        <paper-item>Item 1</paper-item>
        <paper-item>Item 2</paper-item>
      </paper-listbox>
  
  Make a multi-select listbox with the `multi` attribute. Items in a multi-select listbox can be deselected,
  and multiple item can be selected.
  
      <paper-listbox multi>
        <paper-item>Item 1</paper-item>
        <paper-item>Item 2</paper-item>
      </paper-listbox>
  
  ### Styling
  
  The following custom properties and mixins are available for styling:
  
  Custom property | Description | Default
  ----------------|-------------|----------
  `--paper-listbox-background-color`   | Menu background color                                            | `--primary-background-color`
  `--paper-listbox-color`              | Menu foreground color                                            | `--primary-text-color`
  `--paper-listbox`                    | Mixin applied to the listbox                                        | `{}`
  
  ### Accessibility
  
  `<paper-listbox>` has `role="listbox"` by default. A multi-select listbox will also have
  `aria-multiselectable` set. It implements key bindings to navigate through the listbox with the up and
  down arrow keys, esc to exit the listbox, and enter to activate a listbox item. Typing the first letter
  of a listbox item will also focus it.
  
  @group Paper Elements
  @element paper-listbox
  @hero hero.svg
  @demo demo/index.html
  -->
  
  <dom-module id="paper-listbox">
    <template>
      <style>
        :host {
          display: block;
          padding: 8px 0;
  
          background: var(--paper-listbox-background-color, --primary-background-color);
          color: var(--paper-listbox-color, --primary-text-color);
  
          @apply(--paper-listbox);
        }
      </style>
  
      <div class="selectable-content">
        <content></content>
      </div>
    </template>
  
    <script>
      (function() {
        Polymer({
          is: 'paper-listbox',
  
          behaviors: [
            Polymer.IronMenuBehavior
          ],
  
          hostAttributes: {
            role: 'listbox'
          }
        });
      })();
    </script>
  </dom-module>