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 #include "ui/app_list/app_list_model.h"
  10
  11 namespace app_list {
  12
  13 class AppListItem;
  14
  15 class APP_LIST_EXPORT AppListModelObserver {
  16  public:
  17   // Triggered after AppListModel's status has changed.
  18   virtual void OnAppListModelStatusChanged() {}
  19
  20   // Triggered after AppListModel's state has changed.
  21   virtual void OnAppListModelStateChanged(AppListModel::State old_state,
  22                                           AppListModel::State new_state) {}
  23
  24   // Triggered after |item| has been added to the model.
  25   virtual void OnAppListItemAdded(AppListItem* item) {}
  26
  27   // Triggered just before an item is deleted from the model.
  28   virtual void OnAppListItemWillBeDeleted(AppListItem* item) {}
  29
  30   // Triggered just after an item is deleted from the model.
  31   virtual void OnAppListItemDeleted() {}
  32
  33   // Triggered after |item| has moved, changed folders, or changed properties.
  34   virtual void OnAppListItemUpdated(AppListItem* item) {}
  35
  36   // Triggered when the custom launcher page enabled state is changed.
  37   virtual void OnCustomLauncherPageEnabledStateChanged(bool enabled) {}
  38
  39   // Triggered when the search engine is changed to and from Google.
  40   virtual void OnSearchEngineIsGoogleChanged(bool is_google) {}
  41
  42  protected:
  43   virtual ~AppListModelObserver() {}
  44 };
  45
  46 }  // namespace app_list
  47
  48 #endif  // UI_APP_LIST_APP_LIST_MODEL_OBSERVER_H_