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undointerface.h
00001 /* This file is part of the KDE libraries
00002    Copyright (C) 2001 Christoph Cullmann <cullmann@kde.org>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License version 2 as published by the Free Software Foundation.
00007 
00008    This library is distributed in the hope that it will be useful,
00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011    Library General Public License for more details.
00012 
00013    You should have received a copy of the GNU Library General Public License
00014    along with this library; see the file COPYING.LIB.  If not, write to
00015    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016    Boston, MA 02110-1301, USA.
00017 */
00018 
00019 #ifndef __ktexteditor_undointerface_h__
00020 #define __ktexteditor_undointerface_h__
00021 
00022 #include <kdelibs_export.h>
00023 
00024 class TQCString;
00025 
00026 namespace KTextEditor
00027 {
00028 
00032 class KTEXTEDITOR_EXPORT UndoInterface
00033 {
00034   friend class PrivateUndoInterface;
00035 
00036   public:
00037     UndoInterface ();
00038     virtual ~UndoInterface ();
00039 
00040     unsigned int undoInterfaceNumber () const;
00041     
00042   protected:  
00043     void setUndoInterfaceDCOPSuffix (const TQCString &suffix); 
00044 
00045   //
00046   // slots !!!
00047   //
00048   public:
00049     virtual void undo () = 0;
00050 
00051     virtual void redo () = 0;
00052 
00053     virtual void clearUndo () = 0;
00054 
00055     virtual void clearRedo () = 0;
00056 
00057     virtual unsigned int undoCount () const = 0;
00058 
00059     virtual unsigned int redoCount () const = 0;
00060 
00064     virtual unsigned int undoSteps () const = 0;
00065 
00066     virtual void setUndoSteps ( unsigned int steps ) = 0;
00067 
00068   //
00069   // signals !!!
00070   //
00071   public:
00072     virtual void undoChanged () = 0;
00073 
00074   private:
00075     class PrivateUndoInterface *d;
00076     static unsigned int globalUndoInterfaceNumber;
00077     unsigned int myUndoInterfaceNumber;
00078 };
00079 
00080 KTEXTEDITOR_EXPORT UndoInterface *undoInterface (class Document *doc);
00081 
00082 }
00083 
00084 #endif

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