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_PAGINATION_MODEL_OBSERVER_H_ 6 #define UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_ 7 8 #include "ui/app_list/app_list_export.h" 9 10 namespace app_list { 11 12 class APP_LIST_EXPORT PaginationModelObserver { 13 public: 14 // Invoked when the total number of page is changed. 15 virtual void TotalPagesChanged() = 0; 16 17 // Invoked when the selected page index is changed. 18 virtual void SelectedPageChanged(int old_selected, int new_selected) = 0; 19 20 // Invoked when a transition starts. 21 virtual void TransitionStarted() = 0; 22 23 // Invoked when the transition data is changed. 24 virtual void TransitionChanged() = 0; 25 26 protected: 27 virtual ~PaginationModelObserver() {} 28 }; 29 30 } // namespace app_list 31 32 #endif // UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_ 33
