ui/base/models/table_model_observer.h

   1 // Copyright (c) 2011 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_BASE_MODELS_TABLE_MODEL_OBSERVER_H_
   6 #define UI_BASE_MODELS_TABLE_MODEL_OBSERVER_H_
   7
   8 #include "ui/base/ui_base_export.h"
   9
  10 namespace ui {
  11
  12 // Observer for a TableModel. Anytime the model changes, it must notify its
  13 // observer.
  14 class UI_BASE_EXPORT TableModelObserver {
  15  public:
  16   // Invoked when the model has been completely changed.
  17   virtual void OnModelChanged() = 0;
  18
  19   // Invoked when a range of items has changed.
  20   virtual void OnItemsChanged(int start, int length) = 0;
  21
  22   // Invoked when new items are added.
  23   virtual void OnItemsAdded(int start, int length) = 0;
  24
  25   // Invoked when a range of items has been removed.
  26   virtual void OnItemsRemoved(int start, int length) = 0;
  27
  28  protected:
  29   virtual ~TableModelObserver() {}
  30 };
  31
  32 }  // namespace ui
  33
  34 #endif  // UI_BASE_MODELS_TABLE_MODEL_OBSERVER_H_