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      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_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_LISTENER_H_
      6 #define UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_LISTENER_H_
      7 
      8 #include "ui/views/views_export.h"
      9 
     10 namespace views {
     11 
     12 class SingleSplitView;
     13 
     14 // An interface implemented by objects that want to be notified when the
     15 // splitter moves.
     16 class VIEWS_EXPORT SingleSplitViewListener {
     17  public:
     18   // Invoked when split handle is moved by the user. |sender|'s divider_offset
     19   // is already set to the new value, but Layout has not happened yet.
     20   // Returns false if the layout has been handled by the listener, returns
     21   // true if |sender| should do it by itself.
     22   virtual bool SplitHandleMoved(SingleSplitView* sender) = 0;
     23 
     24  protected:
     25   virtual ~SingleSplitViewListener() {}
     26 };
     27 
     28 }  // namespace views
     29 
     30 #endif  // UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_LISTENER_H_
     31