File: vtkSMRemoteObjectUpdateUndoElement.h

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/*=========================================================================

  Program:   ParaView
  Module:    vtkSMRemoteObjectUpdateUndoElement.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/**
 * @class   vtkSMRemoteObjectUpdateUndoElement
 * @brief   vtkSMRemoteObject undo element.
 *
 * This class keeps the before and after state of the RemoteObject in the
 * vtkSMMessage form. It works with any proxy and RemoteObject. It is a very
 * generic undoElement.
*/

#ifndef vtkSMRemoteObjectUpdateUndoElement_h
#define vtkSMRemoteObjectUpdateUndoElement_h

#include "vtkPVServerManagerCoreModule.h" //needed for exports
#include "vtkSMMessageMinimal.h"          // needed for vtkSMMessage
#include "vtkSMUndoElement.h"
#include "vtkWeakPointer.h" //  needed for vtkWeakPointer.

class vtkSMProxyLocator;

class VTKPVSERVERMANAGERCORE_EXPORT vtkSMRemoteObjectUpdateUndoElement : public vtkSMUndoElement
{
public:
  static vtkSMRemoteObjectUpdateUndoElement* New();
  vtkTypeMacro(vtkSMRemoteObjectUpdateUndoElement, vtkSMUndoElement);
  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;

  /**
   * Undo the operation encapsulated by this element.
   * \return the status of the operation, 1 on success, 0 otherwise.
   */
  virtual int Undo() VTK_OVERRIDE;

  /**
   * Redo the operation encaspsulated by this element.
   * \return the status of the operation, 1 on success, 0 otherwise.
   */
  virtual int Redo() VTK_OVERRIDE;

  /**
   * Set ProxyLocator to use if any.
   */
  virtual void SetProxyLocator(vtkSMProxyLocator*);

  /**
   * Set the state of the UndoElement
   */
  virtual void SetUndoRedoState(const vtkSMMessage* before, const vtkSMMessage* after);

  // Current full state of the UndoElement
  vtkSMMessage* BeforeState;
  vtkSMMessage* AfterState;

  virtual vtkTypeUInt32 GetGlobalId();

protected:
  vtkSMRemoteObjectUpdateUndoElement();
  ~vtkSMRemoteObjectUpdateUndoElement();

  // Internal method used to update proxy state based on the state info
  int UpdateState(const vtkSMMessage* state);

  vtkSMProxyLocator* ProxyLocator;

private:
  vtkSMRemoteObjectUpdateUndoElement(const vtkSMRemoteObjectUpdateUndoElement&) VTK_DELETE_FUNCTION;
  void operator=(const vtkSMRemoteObjectUpdateUndoElement&) VTK_DELETE_FUNCTION;
};

#endif