chrome/browser/web_app_icon_manager.h

   1 // Copyright (c) 2006-2008 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_WEB_APP_ICON_MANAGER_H__
   6 #define CHROME_BROWSER_WEB_APP_ICON_MANAGER_H__
   7
   8 #include <windows.h>
   9
  10 #include "base/scoped_ptr.h"
  11 #include "chrome/browser/web_app.h"
  12
  13 class TabContents;
  14
  15 // WebAppIconManager is used by SimpleXPFrame/SimpleVistaFrame to manage the
  16 // icons for the frame. If the current contents are a web app, then icon is
  17 // set from the app, otherwise the icons are set to the default.
  18 class WebAppIconManager : public WebApp::Observer {
  19  public:
  20   explicit WebAppIconManager(HWND parent);
  21   ~WebAppIconManager();
  22
  23   // Sets the contents the WebApp should come from. If the contents has a web
  24   // app, the image comes from it, otherwise the icon for the HWND is set to
  25   // the default chrome icon.
  26   void SetContents(TabContents* contents);
  27
  28   // Enables/disables icons. If true and this WebAppIconManager was previously
  29   // disabled, the icon is updated immediately.
  30   void SetUpdatesEnabled(bool enabled);
  31
  32  private:
  33   // Invoked when the icons of the WebApp has changed. Invokes
  34   // UpdateIconsFromApp appropriately.
  35   virtual void WebAppImagesChanged(WebApp* web_app);
  36
  37   // Updates the icons of the HWND, unless we're disabled in which case this
  38   // does nothing.
  39   void UpdateIconsFromApp();
  40
  41   // HWND the icon is updated on.
  42   const HWND hwnd_;
  43
  44   // Current app, may be null.
  45   scoped_refptr<WebApp> app_;
  46
  47   // Icons. These are only valid if the app doesn't have an icon.
  48   HICON small_icon_;
  49   HICON big_icon_;
  50
  51   // Are we enabled? If not, we won't update the icons of the HWND.
  52   bool enabled_;
  53
  54   DISALLOW_EVIL_CONSTRUCTORS(WebAppIconManager);
  55 };
  56
  57 #endif  // CHROME_BROWSER_WEB_APP_ICON_MANAGER_H__
  58