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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_STATUS_WINDOW_SWITCHER_BUTTON_H_
      6 #define CHROME_BROWSER_CHROMEOS_STATUS_WINDOW_SWITCHER_BUTTON_H_
      7 #pragma once
      8 
      9 #include "base/memory/scoped_ptr.h"
     10 #include "chrome/browser/chromeos/status/status_area_button.h"
     11 #include "chrome/browser/ui/browser_list.h"
     12 #include "content/common/notification_observer.h"
     13 #include "views/controls/button/menu_button.h"
     14 #include "views/controls/menu/view_menu_delegate.h"
     15 
     16 namespace chromeos {
     17 
     18 class StatusAreaHost;
     19 
     20 // The window switcher button in the status area.  This button allows
     21 // the user to move to the next window if they click on the icon.
     22 class WindowSwitcherButton : public StatusAreaButton,
     23                              public views::ViewMenuDelegate,
     24                              public BrowserList::Observer {
     25  public:
     26   explicit WindowSwitcherButton(StatusAreaHost* host);
     27   virtual ~WindowSwitcherButton();
     28 
     29  private:
     30   // Updates the status of the button based on the state of the
     31   // browser list.
     32   void UpdateStatus();
     33 
     34   // BrowserList::Observer API
     35   virtual void OnBrowserAdded(const Browser* browser);
     36   virtual void OnBrowserRemoved(const Browser* browser);
     37 
     38   // views::ViewMenuDelegate implementation.
     39   virtual void RunMenu(views::View* source, const gfx::Point& pt);
     40 
     41   DISALLOW_COPY_AND_ASSIGN(WindowSwitcherButton);
     42 };
     43 
     44 }  // namespace chromeos
     45 
     46 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_WINDOW_SWITCHER_BUTTON_H_
     47