chrome/browser/ui/toolbar/wrench_menu_badge_controller.h

   1 // Copyright 2014 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_UI_TOOLBAR_WRENCH_MENU_BADGE_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_TOOLBAR_WRENCH_MENU_BADGE_CONTROLLER_H_
   7
   8 #include "base/macros.h"
   9 #include "chrome/browser/ui/toolbar/wrench_icon_painter.h"
  10 #include "content/public/browser/notification_details.h"
  11 #include "content/public/browser/notification_observer.h"
  12 #include "content/public/browser/notification_registrar.h"
  13 #include "content/public/browser/notification_service.h"
  14
  15 class Profile;
  16
  17 // WrenchMenuBadgeController encapsulates the logic for badging the wrench menu
  18 // icon as a result of various events - such as available updates, errors, etc.
  19 class WrenchMenuBadgeController : public content::NotificationObserver {
  20  public:
  21   enum BadgeType {
  22     BADGE_TYPE_NONE,
  23     BADGE_TYPE_UPGRADE_NOTIFICATION,
  24     BADGE_TYPE_GLOBAL_ERROR,
  25     BADGE_TYPE_INCOMPATIBILITY_WARNING,
  26   };
  27
  28   // Delegate interface for receiving badge update notifications.
  29   class Delegate {
  30    public:
  31     // Notifies the UI to update the badge to have the specified |severity|, as
  32     // well as specifying whether it should |animate|. The |type| parameter
  33     // specifies the type of change (i.e. the source of the notification).
  34     virtual void UpdateBadgeSeverity(BadgeType type,
  35                                      WrenchIconPainter::Severity severity,
  36                                      bool animate) = 0;
  37
  38    protected:
  39     virtual ~Delegate() {}
  40   };
  41
  42   // Creates an instance of this class for the given |profile| that will notify
  43   // |delegate| of updates.
  44   WrenchMenuBadgeController(Profile* profile, Delegate* delegate);
  45   virtual ~WrenchMenuBadgeController();
  46
  47   // Forces an update of the UI based on the current state of the world. This
  48   // will check whether there are any current pending updates, global errors,
  49   // etc. and based on that information trigger an appropriate call to the
  50   // delegate.
  51   void UpdateDelegate();
  52
  53  private:
  54   // content::NotificationObserver:
  55   virtual void Observe(int type,
  56                        const content::NotificationSource& source,
  57                        const content::NotificationDetails& details) OVERRIDE;
  58
  59   Profile* profile_;
  60   Delegate* delegate_;
  61   content::NotificationRegistrar registrar_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(WrenchMenuBadgeController);
  64 };
  65
  66 #endif  // CHROME_BROWSER_UI_TOOLBAR_WRENCH_MENU_BADGE_CONTROLLER_H_