| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_ |
| #define UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_ |
| |
| #include "ui/app_list/app_list_export.h" |
| |
| namespace app_list { |
| |
| class APP_LIST_EXPORT PaginationModelObserver { |
| public: |
| // Invoked when the total number of page is changed. |
| virtual void TotalPagesChanged() = 0; |
| |
| // Invoked when the selected page index is changed. |
| virtual void SelectedPageChanged(int old_selected, int new_selected) = 0; |
| |
| // Invoked when a transition starts. |
| virtual void TransitionStarted() = 0; |
| |
| // Invoked when the transition data is changed. |
| virtual void TransitionChanged() = 0; |
| |
| protected: |
| virtual ~PaginationModelObserver() {} |
| }; |
| |
| } // namespace app_list |
| |
| #endif // UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_ |