Source: ktexteditor/undointerface.h

# Source: ktexteditor/undointerface.h |
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    /* This file is part of the KDE libraries
       Copyright (C) 2001 Christoph Cullmann

       This library is free software; you can redistribute it and/or
       modify it under the terms of the GNU Library General Public
       License version 2 as published by the Free Software Foundation.

       This library is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       Library General Public License for more details.

       You should have received a copy of the GNU Library General Public License
       along with this library; see the file COPYING.LIB.  If not, write to
       the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
       Boston, MA 02111-1307, USA.
    */

    #ifndef __ktexteditor_undointerface_h__
    #define __ktexteditor_undointerface_h__

    class QCString;

    namespace KTextEditor
    {

    /*
    *  This is an interface for the KTextEditor::Document class !!!
    */
    class UndoInterface
    {
      friend class PrivateUndoInterface;

      public:
        UndoInterface ();
        virtual ~UndoInterface ();

        unsigned int undoInterfaceNumber () const;

      protected:
        void setUndoInterfaceDCOPSuffix (const QCString &suffix);

      //
      // slots !!!
      //
      public:
        virtual void undo () = 0;

        virtual void redo () = 0;

        virtual void clearUndo () = 0;

        virtual void clearRedo () = 0;

        virtual unsigned int undoCount () const = 0;

        virtual unsigned int redoCount () const = 0;

        /**
          returns the maximum of undo steps possible, 0 means no limit !
         */
        virtual unsigned int undoSteps () const = 0;

        virtual void setUndoSteps ( unsigned int steps ) = 0;

      //
      // signals !!!
      //
      public:
        virtual void undoChanged () = 0;

      private:
        class PrivateUndoInterface *d;
        static unsigned int globalUndoInterfaceNumber;
        unsigned int myUndoInterfaceNumber;
    };

    UndoInterface *undoInterface (class Document *doc);

    }

    #endif

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