paper-tab.html

<!--
Copyright (c) 2014 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
-->

<!--
`paper-tab` is styled to look like a tab.  It should be used in conjunction with
`paper-tabs`.

Example:

    <paper-tabs selected="0">
      <paper-tab>TAB 1</paper-tab>
      <paper-tab>TAB 2</paper-tab>
      <paper-tab>TAB 3</paper-tab>
    </paper-tabs>
    
Styling tab:

To change the ink color:

    .pink paper-tab::shadow #ink {
      color: #ff4081;
    }

@group Paper Elements
@element paper-tab
@homepage github.io
-->

<link rel="import" href="../paper-ripple/paper-ripple.html">

<polymer-element name="paper-tab" attributes="noink" role="tab" inline flex center-center horizontal layout>
<template>

  <link rel="stylesheet" href="paper-tab.css">
  
  <div class="tab-content" flex auto center-center horizontal layout><content></content></div>
  <paper-ripple id="ink" initialOpacity="0.95" opacityDecayVelocity="0.98"></paper-ripple>
  
</template>
<script>

  Polymer('paper-tab', {
    
    /**
     * If true, ink ripple effect is disabled.
     *
     * @attribute noink
     * @type boolean
     * @default false
     */
    noink: false,
    
    eventDelegates: {
      down: 'downAction',
      up: 'upAction'
    },

    downAction: function(e) {
      if (this.noink || (this.parentElement && this.parentElement.noink)) {
        return;
      }
      this.$.ink.downAction(e);
    },

    upAction: function() {
      this.$.ink.upAction();
    },
    
    cancelRipple: function() {
      this.$.ink.upAction();
    }
    
  });
  
</script>
</polymer-element>