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undo-stack-observer.h

/**
 * Undo / redo / undo log commit listener
 *
 * Authors:
 * David Yip <yipdw@rose-hulman.edu>
 *
 * Copyright (c) 2005 Authors
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifndef __WHITEBOARD_UNDO_COMMIT_OBSERVER_H__
#define __WHITEBOARD_UNDO_COMMIT_OBSERVER_H__

#include <glibmm.h>
#include "../undo-stack-observer.h"
#include "jabber_whiteboard/typedefs.h"

namespace Inkscape {

namespace Whiteboard {

class SessionManager;

/**
 * Inkboard implementation of Inkscape::UndoStackObserver.
 */
00028 class UndoStackObserver : public Inkscape::UndoStackObserver {
public:
      enum ObserverType {
            UNDO_EVENT,
            REDO_EVENT,
            UNDO_COMMIT_EVENT
      };

      UndoStackObserver(SessionManager* sm);
      ~UndoStackObserver();
      void notifyUndoEvent(XML::Event* log);
      void notifyRedoEvent(XML::Event* log);
      void notifyUndoCommitEvent(XML::Event* log);

      void lockObserverFromSending(ObserverType type);
      void unlockObserverFromSending(ObserverType type);

private:
      SessionManager* _sm;

      // common action handler
      void _doAction(XML::Event* log);

      // noncopyable, nonassignable
      UndoStackObserver(UndoStackObserver const& other);
      UndoStackObserver& operator=(UndoStackObserver const& other);

      unsigned int _undoSendEventLocks;
      unsigned int _redoSendEventLocks;
      unsigned int _undoCommitSendEventLocks;
};

}

}

#endif

/*
  Local Variables:
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  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :

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