ui/app_list/pagination_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_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_