---

Common/vtkProcessObject.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkProcessObject.h,v $
  Language:  C++

  Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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.

=========================================================================*/
#ifndef __vtkProcessObject_h
#define __vtkProcessObject_h

#include "vtkObject.h"

class vtkDataObject;

class VTK_COMMON_EXPORT vtkProcessObject : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkProcessObject,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  void SetStartMethod(void (*f)(void *), void *arg);

  void SetProgressMethod(void (*f)(void *), void *arg);

  void SetEndMethod(void (*f)(void *), void *arg);

  void SetStartMethodArgDelete(void (*f)(void *));

  void SetProgressMethodArgDelete(void (*f)(void *));

  void SetEndMethodArgDelete(void (*f)(void *));


  vtkSetMacro(AbortExecute,int);
  vtkGetMacro(AbortExecute,int);
  vtkBooleanMacro(AbortExecute,int);


  vtkSetClampMacro(Progress,float,0.0f,1.0f);
  vtkGetMacro(Progress,float);

  void UpdateProgress(float amount);


  vtkSetStringMacro(ProgressText);
  vtkGetStringMacro(ProgressText);

  // left public for performance since it is used in inner loops
  int AbortExecute;


  vtkDataObject **GetInputs() {return this->Inputs;}
  vtkGetMacro(NumberOfInputs,int);

  void SqueezeInputArray();
  
  void RemoveAllInputs();

protected:
  vtkProcessObject();
  ~vtkProcessObject();

  // Progress/Update handling
  unsigned long StartTag;
  unsigned long ProgressTag;
  unsigned long EndTag;
  float Progress;
  char  *ProgressText;

  int NumberOfInputs;
  int NumberOfRequiredInputs;
  vtkDataObject **Inputs;     //An array of the inputs to the filter
  // Temporary arrays used internally.  
  // It is only valid after SortInputsByLocality is called.
  vtkDataObject **SortedInputs;   // Inputs sorted by locality
  // We need a second array for an effficeint search.  
  // This array is never valid.
  vtkDataObject **SortedInputs2;   
  void SortInputsByLocality();
  // A helper method for quicksort.
  void SortMerge(vtkDataObject **a1, int l1,
                 vtkDataObject **a2, int l2,
                 vtkDataObject **results);

  // Called to allocate the input array.  Copies old inputs.
  void SetNumberOfInputs(int num);

  // protected methods for setting inputs.
  virtual void SetNthInput(int num, vtkDataObject *input);
  virtual void AddInput(vtkDataObject *input);
  virtual void RemoveInput(vtkDataObject *input);
  
private:
  vtkProcessObject(const vtkProcessObject&);  // Not implemented.
  void operator=(const vtkProcessObject&);  // Not implemented.
};

#endif

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