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

  Program:   ParaView
  Module:    vtkSMInteractionUndoStackBuilder.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.

=========================================================================*/
// .NAME vtkSMInteractionUndoStackBuilder - builder server manager undo
// sets for render view interactions and pushes them on the undo stack.
// .SECTION Description
// vtkSMInteractionUndoStackBuilder specializes in interaction.
// This class can create undo elements for only one render view
// at a time.

#ifndef vtkSMInteractionUndoStackBuilder_h
#define vtkSMInteractionUndoStackBuilder_h

#include "vtkPVServerManagerDefaultModule.h" //needed for exports
#include "vtkSMObject.h"

class vtkSMInteractionUndoStackBuilderObserver;
class vtkSMRenderViewProxy;
class vtkSMUndoStack;
class vtkUndoSet;

class VTKPVSERVERMANAGERDEFAULT_EXPORT vtkSMInteractionUndoStackBuilder : public vtkSMObject
{
public:
  static vtkSMInteractionUndoStackBuilder* New();
  vtkTypeMacro(vtkSMInteractionUndoStackBuilder, vtkSMObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Get/Set the render view proxy for which we are monitoring the
  // interactions.
  void SetRenderView(vtkSMRenderViewProxy*);
  vtkGetObjectMacro(RenderView, vtkSMRenderViewProxy);

  // Description:
  // Get/Set the undo stack that this builder will build.
  vtkGetObjectMacro(UndoStack, vtkSMUndoStack);
  virtual void SetUndoStack(vtkSMUndoStack*);

  // Description:
  // Clear the undo set currently being recorded.
  void Clear();


  // Description:
  // Called to record the state at the beginning of an interaction.
  // Usually, this method isn't called directly, since the builder
  // listens to interaction events on the interactor and calls it
  // automatically. May be used when changing the camera
  // programatically.
  void StartInteraction();

  // Description:
  // Called to record the state at the end of an interaction and push
  // it on the stack.
  // Usually, this method isn't called directly, since the builder
  // listens to interaction events on the interactor and calls it
  // automatically. May be used when changing the camera
  // programatically.
  void EndInteraction();

//BTX
protected:
  vtkSMInteractionUndoStackBuilder();
  ~vtkSMInteractionUndoStackBuilder();

  vtkSMRenderViewProxy* RenderView;
  vtkSMUndoStack* UndoStack;
  vtkUndoSet* UndoSet;


  // Description:
  // Event handler.
  void ExecuteEvent(vtkObject* caller, unsigned long event, void* data);


  void PropertyModified(const char* pname);

  friend class vtkSMInteractionUndoStackBuilderObserver;
private:
  vtkSMInteractionUndoStackBuilder(const vtkSMInteractionUndoStackBuilder&); // Not implemented.
  void operator=(const vtkSMInteractionUndoStackBuilder&); // Not implemented.


  vtkSMInteractionUndoStackBuilderObserver* Observer;
//ETX
};


#endif