ui/app_list/app_list_model_observer.h

   1 // Copyright (c) 2012 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 UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_
   6 #define UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_
   7
   8 #include "ui/app_list/app_list_export.h"
   9
  10 namespace app_list {
  11
  12 class AppListItem;
  13
  14 class APP_LIST_EXPORT AppListModelObserver {
  15  public:
  16   // Invoked when AppListModel's status has changed.
  17   virtual void OnAppListModelStatusChanged() {}
  18
  19   // Triggered after |item| has been added to the model.
  20   virtual void OnAppListItemAdded(AppListItem* item) {}
  21
  22   // Triggered just before an item is deleted from the model.
  23   virtual void OnAppListItemWillBeDeleted(AppListItem* item) {}
  24
  25   // Triggered after |item| has moved or changed folders.
  26   virtual void OnAppListItemUpdated(AppListItem* item) {}
  27
  28  protected:
  29   virtual ~AppListModelObserver() {}
  30 };
  31
  32 }  // namespace app_list
  33
  34 #endif  // UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_