MeVisLab/Standard/Sources/ML/MLCSO/CSOBase/CSOUndoRedo/CSOUndoRedoManager.h

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// **InsertLicense** code
//----------------------------------------------------------------------------------

//----------------------------------------------------------------------------------

#ifndef __CSOUndoRedoManager_H
#define __CSOUndoRedoManager_H

#include "CSOUndoRedoCommands.h"


ML_START_NAMESPACE



class MLCSO_EXPORT CSOUndoRedoManager
{

public:

  enum UNDO_MODE {
    MODE_UNDOING = 0, 
    MODE_REDOING = 1, 
    MODE_NORMAL  = 2  
  };


  CSOUndoRedoManager(CSOList* csoList);

  ~CSOUndoRedoManager();

  void addCommand(CSOCommand* command);
  void popUndoCommand();


  void undo();
  void redo();

  void openGroup();
  void closeGroup();

  void clearUndo();
  void clearRedo();
  void clearAll();


  void pushUndoCommand(CSOCommand* command);
  void pushRedoCommand(CSOCommand* command);


  bool canUndo() const;
  bool canRedo() const;

  inline int maxNumUndos() const { return _maxUndoSize; }
  void setMaxNumUndos(int maxNumUndos);


  int numUndos() const;
  int numRedos() const;

  bool isInUndoMode() const;
  bool isInRedoMode() const;

  inline void enableUndoRedo() { _isEnabled = true; }
  inline void disableUndoRedo() { _isEnabled = false;}

  inline bool isEnabled() { return _isEnabled; }

private:

  void executeGroup(std::vector<CSOCommand*>& stack);

  void increaseUndoSize();
  void decreaseUndoSize();

  void removeFirstUndo();

  std::vector<CSOCommand*> _undoStack;

  std::vector<CSOCommand*> _redoStack;

  int _mode;

  int _maxUndoSize;
  int _currentUndoSize;
  int _currentRedoSize;

  int _currentGroupId;
  int _currentGroupDepth;

  bool _isEnabled;

  CSOList* _csoList;
};




ML_END_NAMESPACE


#endif // __CSOUndoRedoManager_H_