File: vtkCompositeRepresentation.h

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

  Program:   ParaView
  Module:    vtkCompositeRepresentation.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 vtkCompositeRepresentation - combine multiple representations into one
// with only 1 representation active at a time.
// .SECTION Description
// vtkCompositeRepresentation makes is possible to combine multiple
// representations into one. Only one representation can be active at a give
// time. vtkCompositeRepresentation provides API to add the representations that
// form the composite and to pick the active representation.
//
// vtkCompositeRepresentation relies on call AddToView and RemoveFromView
// on the internal representations whenever it needs to change the active
// representation. So it is essential that representations handle those methods
// correctly and don't suffer from uncanny side effects when that's done
// repeatedly.

#ifndef vtkCompositeRepresentation_h
#define vtkCompositeRepresentation_h

#include "vtkPVClientServerCoreRenderingModule.h" //needed for exports
#include "vtkPVDataRepresentation.h"

class vtkStringArray;

class VTKPVCLIENTSERVERCORERENDERING_EXPORT vtkCompositeRepresentation : public vtkPVDataRepresentation
{
public:
  static vtkCompositeRepresentation* New();
  vtkTypeMacro(vtkCompositeRepresentation, vtkPVDataRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Methods overridden to propagate to the active representation.
  virtual void SetVisibility(bool val);

  // Description:
  // Add/Remove representations. \c key is a unique string used to identify
  // that representation.
  virtual void AddRepresentation(const char* key, vtkPVDataRepresentation* repr);
  virtual void RemoveRepresentation(vtkPVDataRepresentation* repr);
  virtual void RemoveRepresentation(const char* key);

  // Description:
  // Set the active key. If a valid key is not specified, then none of the
  // representations is treated as active.
  void SetActiveRepresentation(const char* key);
  const char* GetActiveRepresentationKey();

  // Description:
  // Returns the active representation if valid.
  vtkPVDataRepresentation* GetActiveRepresentation();

  // Description:
  // Overridden to simply pass the input to the internal representations. We
  // won't need this if vtkPVDataRepresentation correctly respected in the
  // arguments passed to it during ProcessRequest() etc.
  virtual void SetInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void SetInputConnection(vtkAlgorithmOutput* input);
  virtual void AddInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void AddInputConnection(vtkAlgorithmOutput* input);
  virtual void RemoveInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void RemoveInputConnection(int port, int idx);

  // Description:
  // Propagate the modification to all internal representations.
  virtual void MarkModified();

  // Description:
  // Returns the data object that is rendered from the given input port.
  virtual vtkDataObject* GetRenderedDataObject(int port);

  // Description:
  // Returns the list of available representation types as a string array.
  vtkStringArray* GetRepresentationTypes();

  // Description:
  // Passed on to internal representations as well.
  virtual void SetUpdateTime(double time);
  virtual void SetForceUseCache(bool val);
  virtual void SetForcedCacheKey(double val);

protected:
  vtkCompositeRepresentation();
  ~vtkCompositeRepresentation();

  virtual int FillInputPortInformation( int, vtkInformation* info);

  // Description:
  // Adds the representation to the view.  This is called from
  // vtkView::AddRepresentation().  Subclasses should override this method.
  // Returns true if the addition succeeds.
  virtual bool AddToView(vtkView* view);

  // Description:
  // Removes the representation to the view.  This is called from
  // vtkView::RemoveRepresentation().  Subclasses should override this method.
  // Returns true if the removal succeeds.
  virtual bool RemoveFromView(vtkView* view);

  // Description:
  // Fires UpdateDataEvent
  void TriggerUpdateDataEvent();

private:
  vtkCompositeRepresentation(const vtkCompositeRepresentation&); // Not implemented
  void operator=(const vtkCompositeRepresentation&); // Not implemented

  class vtkInternals;
  vtkInternals* Internals;
  vtkCommand* Observer;

};

#endif