Print Preview Cleanup: Creating enum with all custom events used.

chrome/browser/resources/print_preview/margin_textbox.js

 // Copyright (c) 2011 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.
 
 cr.define('print_preview', function() {
   'strict';
 
   function MarginTextbox(groupName) {
     var box = document.createElement('input');
     box.__proto__ = MarginTextbox.prototype;
@@ skipping 130 matching lines @@
      */
     onBlur_: function() {
       clearTimeout(this.timerId_);
       this.validate();
       if (!this.isValid) {
         this.setValue_(this.lastValidValueInPoints);
         this.validate();
       }
 
       this.updateColor();
-      cr.dispatchSimpleEvent(document, 'updateSummary');
-      cr.dispatchSimpleEvent(document, 'updatePrintButton');
-      cr.dispatchSimpleEvent(this, 'MarginsMayHaveChanged');
+      cr.dispatchSimpleEvent(document, customEvents.UPDATE_SUMMARY);
+      cr.dispatchSimpleEvent(document, customEvents.UPDATE_PRINT_BUTTON);
+      cr.dispatchSimpleEvent(this, customEvents.MARGINS_MAY_HAVE_CHANGED);
     },
 
     /**
      * Executes whenever a keypressed event occurs. Note: Only the "Enter" key
      * event is handled. The "Escape" key does not result in such event,
      * therefore it is handled by |this.onKeyUp_|.
      * @param {KeyboardEvent} e The event that triggered this listener.
      * @private
      */
     onKeyPressed_: function(e) {
       if (e.keyCode == MarginTextbox.ENTER_KEYCODE)
         this.blur();
     },
 
     /**
      * Executes whenever a keyup event occurs. Note: Only the "Escape"
      * key event is handled.
      * @param {KeyboardEvent} e The event that triggered this listener.
      * @private
      */
     onKeyUp_: function(e) {
       if (e.keyCode == MarginTextbox.ESCAPE_KEYCODE) {
         this.setValue_(this.lastValidValueInPoints);
         this.validate();
         this.updateColor();
-        cr.dispatchSimpleEvent(document, 'updateSummary');
-        cr.dispatchSimpleEvent(document, 'updatePrintButton');
+        cr.dispatchSimpleEvent(document, customEvents.UPDATE_SUMMARY);
+        cr.dispatchSimpleEvent(document, customEvents.UPDATE_PRINT_BUTTON);
       }
     },
 
     /**
      * Resetting the timer used to detect when the user stops typing in order
      * to update the print preview.
      * @private
      */
     resetTimer_: function() {
       clearTimeout(this.timerId_);
       this.timerId_ = window.setTimeout(
           this.onTextValueMayHaveChanged.bind(this), 1000);
     },
 
     /**
      * Executes whenever the user stops typing or when a drag session associated
      * with |this| ends.
      */
     onTextValueMayHaveChanged: function() {
       this.validate();
       this.updateColor();
-      cr.dispatchSimpleEvent(document, 'updateSummary');
-      cr.dispatchSimpleEvent(document, 'updatePrintButton');
+      cr.dispatchSimpleEvent(document, customEvents.UPDATE_SUMMARY);
+      cr.dispatchSimpleEvent(document, customEvents.UPDATE_PRINT_BUTTON);
 
       if (!this.isValid)
         return;
-      cr.dispatchSimpleEvent(this, 'MarginsMayHaveChanged');
+      cr.dispatchSimpleEvent(this, customEvents.MARGINS_MAY_HAVE_CHANGED);
     }
 
   };
 
   return {
     MarginTextbox: MarginTextbox
   };
 });