Activate the status area only when it's focused using the keyboard

chrome/browser/chromeos/status/status_area_view.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_STATUS_STATUS_AREA_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_STATUS_AREA_VIEW_H_
 #pragma once
 
 #include <list>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
 #include "ui/views/accessible_pane_view.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_delegate.h"
 
 // This class is used to wrap the small informative widgets in the upper-right
 // of the window title bar. It is used on ChromeOS only.
 class StatusAreaView : public views::AccessiblePaneView,
                        public views::Widget::Observer,
-                       public base::SupportsWeakPtr<StatusAreaView> {
+                       public base::SupportsWeakPtr<StatusAreaView>,
+                       public views::WidgetDelegate {
  public:
   enum ButtonBorder {
     NO_BORDER,
     HAS_BORDER
   };
 
-  explicit StatusAreaView();
+  StatusAreaView();
   virtual ~StatusAreaView();
 
   void AddButton(StatusAreaButton* button, ButtonBorder border);
   void RemoveButton(StatusAreaButton* button);
 
   void MakeButtonsActive(bool active);
   void UpdateButtonVisibility();
 
   // Refresh the style used to paint all buttons' text.  Schedules repaint.
   void UpdateButtonTextStyle();
 
   // Takes focus and transfers it to the first (last if |reverse| is true).
   // After focus has traversed through all elements, clears focus and calls
   // |return_focus_cb(reverse)| from the message loop.
   typedef base::Callback<void(bool)> ReturnFocusCallback;
   void TakeFocus(bool reverse,
                  const ReturnFocusCallback& return_focus_cb);
 
   // views::View* overrides.
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void PreferredSizeChanged() OVERRIDE;
   virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE;
 
+  // views::WidgetDelegate overrides:
+  virtual bool CanActivate() const OVERRIDE;
+  virtual views::Widget* GetWidget() OVERRIDE;
+  virtual const views::Widget* GetWidget() const OVERRIDE;
+
  private:
   // Overridden from views::FocusChangeListener:
   virtual void OnDidChangeFocus(views::View* focused_before,
                                 views::View* focused_now) OVERRIDE;
 
   // Overriden from views::Widget::Observer:
   virtual void OnWidgetActivationChanged(views::Widget* widget,
                                          bool active) OVERRIDE;
 
   // Overriden from views::AccessiblePaneView:
@@ skipping 13 matching lines @@
   // Clears focus and calls |return_focus_cb_|.
   void ReturnFocus(bool reverse);
 
   // Clears focus (called when widget is deactivated).
   void ClearFocus();
 
   DISALLOW_COPY_AND_ASSIGN(StatusAreaView);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_STATUS_AREA_VIEW_H_