paper-inky-focus-behavior.html 1.28 KB
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<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-behaviors/iron-button-state.html">

<script>

  /**
   * `Polymer.PaperInkyFocusBehavior` implements a ripple when the element has keyboard focus.
   *
   * @polymerBehavior Polymer.PaperInkyFocusBehavior
   */
  Polymer.PaperInkyFocusBehaviorImpl = {

    observers: [
      '_focusedChanged(receivedFocusFromKeyboard)'
    ],

    _focusedChanged: function(receivedFocusFromKeyboard) {
      if (!this.$.ink) {
        return;
      }

      this.$.ink.holdDown = receivedFocusFromKeyboard;
    }

  };

  /** @polymerBehavior Polymer.PaperInkyFocusBehavior */
  Polymer.PaperInkyFocusBehavior = [
    Polymer.IronButtonState,
    Polymer.IronControlState,
    Polymer.PaperInkyFocusBehaviorImpl
  ];

</script>