AudioPlayer.app: Migrate to Polymer 1.0.

ui/file_manager/audio_player/elements/volume_controller.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function() {
   'use strict';
 
   /**
    * @constructor
    * @extends {PolymerElement}
    */
   var VolumeControllerElement = function() {};
 
   VolumeControllerElement.prototype = {
+    is: 'volume-controller',
+
+    properties: {
+      /**
+       * Width of the element in pixels. Must be specified before ready() is
+       * called. Dynamic change is not supported.
+       * @type {number}
+       */
+      width: {
+        type: Number,
+        value: 32
+      },
+
+      /**
+       * Height of the element in pixels. Must be specified before ready() is
+       * called. Dynamic change is not supported.
+       * @type {number}
+       */
+      height: {
+        type: Number,
+        value: 100
+      },
+
+      /**
+       * Volume. 0 is silent, and 100 is maximum.
+       * @type {number}
+       */
+      value: {
+        type: Number,
+        value: 50,
+        observer: 'valueChanged',
+        notify: true
+      },
+
+      /**
+       * Volume. 100 is silent, and 0 is maximum.
+       * @type {number}
+       */
+      rawValue: {
+        type: Number,
+        value: 0,
+        observer: 'rawValueChanged',
+        notify: true
+      }
+    },
+
     /**
      * Initializes an element. This method is called automatically when the
      * element is ready.
      */
     ready: function() {
       this.style.width = this.width + 'px';
       this.style.height = this.height + 'px';
 
       this.rawValueInput = this.$.rawValueInput;
       this.bar = this.$.bar;
 
       this.rawValueInput.style.width = this.height + 'px';
       this.rawValueInput.style.height = this.width + 'px';
       this.rawValueInput.style.webkitTransformOrigin =
           (this.width / 2) + 'px ' +
           (this.width / 2 - 2) + 'px';
 
       var barLeft = (this.width / 2 - 1);
       this.bar.style.left = barLeft + 'px';
       this.bar.style.right = barLeft + 'px';
 
       this.addEventListener('keydown', this.onKeyDown_.bind(this));
     },
 
     /**
-     * Registers handlers for changing of external variables
+     * Invoked when the 'volume' value is changed.
+     * @param {number} newValue New value.
+     * @param {number} oldValue Old value.
      */
-    observe: {
-      'model.volume': 'onVolumeChanged',
-    },
-
-    /**
-     * Model object of the Audio Player.
-     * @type {AudioPlayerModel}
-     */
-    model: null,
-
-    /**
-     * Invoked when the model changed.
-     * @param {AudioPlayerModel} oldValue Old Value.
-     * @param {AudioPlayerModel} newValue New Value.
-     */
-    modelChanged: function(oldValue, newValue) {
-      this.onVolumeChanged((oldValue || {}).volume, (newValue || {}).volume);
-    },
-
-    /**
-     * Volume. 0 is silent, and 100 is maximum.
-     * @type {number}
-     */
-    value: 50,
-
-    /**
-     * Volume. 1000 is silent, and 0 is maximum.
-     * @type {number}
-     */
-    rawValue: 0,
-
-    /**
-     * Height of the element in pixels. Must be specified before ready() is
-     * called. Dynamic change is not supported.
-     * @type {number}
-     */
-    height: 100,
-
-    /**
-     * Width of the element in pixels. Must be specified before ready() is
-     * called. Dynamic change is not supported.
-     * @type {number}
-     */
-    width: 32,
-
-    /**
-     * Invoked when the 'volume' value in the model is changed.
-     * @param {number} oldValue Old value.
-     * @param {number} newValue New value.
-     */
-    onVolumeChanged: function(oldValue, newValue) {
+    valueChanged: function(newValue, oldValue) {
       if (oldValue != newValue)
         this.rawValue = 100 - newValue;
     },
 
     /**
      * Invoked when the 'rawValue' property is changed.
+     * @param {number} newValue New value.
      * @param {number} oldValue Old value.
-     * @param {number} newValue New value.
      */
-    rawValueChanged: function(oldValue, newValue) {
-      if (oldValue != newValue)
-        this.model.volume = 100 - newValue;
+    rawValueChanged: function(newValue, oldValue) {
+      if (oldValue !== newValue)
+        this.value = 100 - newValue;
     },
 
     /**
      * Invoked when the 'keydown' event is fired.
      * @param {Event} event The event object.
      */
     onKeyDown_: function(event) {
       switch (event.keyIdentifier) {
         // Prevents the default behavior. These key should be handled in
         // <audio-player> element.
         case 'Up':
         case 'Down':
         case 'PageUp':
         case 'PageDown':
           event.preventDefault();
           break;
       }
     },
+
+    /**
+     * Computes style for '.filled' element based on raw value.
+     * @return {string}
+     */
+    computeFilledStyle_: function(rawValue) {
+      return 'height: ' + rawValue + '%;';
+    }
   };
 
-  Polymer('volume-controller', VolumeControllerElement.prototype);
+  Polymer(VolumeControllerElement.prototype);
 })();  // Anonymous closure