1 files changed, 29 insertions, 0 deletions
diff --git a/views/controls/table/table_model_observer.h b/views/controls/table/table_model_observer.h
new file mode 100644
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+++ b/views/controls/table/table_model_observer.h
@@ -0,0 +1,29 @@
+// Copyright (c) 2009 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 VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_
+#define VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_
+
+namespace views {
+
+// Observer for a TableModel. Anytime the model changes, it must notify its
+// observer.
+class TableModelObserver {
+ public:
+  // Invoked when the model has been completely changed.
+  virtual void OnModelChanged() = 0;
+
+  // Invoked when a range of items has changed.
+  virtual void OnItemsChanged(int start, int length) = 0;
+
+  // Invoked when new items are added.
+  virtual void OnItemsAdded(int start, int length) = 0;
+
+  // Invoked when a range of items has been removed.
+  virtual void OnItemsRemoved(int start, int length) = 0;
+};
+
+}  // namespace views
+
+#endif  // VIEWS_CONTROL_TABLE_TABLE_MODEL_OBSERVER_H_