vtkSource.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkSource.h,v $

  Copyright (c) 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 __vtkSource_h
#define __vtkSource_h

#include "vtkProcessObject.h"

class vtkDataObject;
class vtkDistributedExecutive;

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

  virtual void Update();

  virtual void UpdateWholeExtent();

  virtual void UpdateInformation();

  virtual void PropagateUpdateExtent(vtkDataObject *output);

  virtual void TriggerAsynchronousUpdate();

  virtual void UpdateData(vtkDataObject *output);

  virtual void ComputeInputUpdateExtents( vtkDataObject *output );


  virtual void SetReleaseDataFlag(int);
  virtual int GetReleaseDataFlag();
  vtkBooleanMacro(ReleaseDataFlag,int);


  vtkDataObject **GetOutputs();
  vtkGetMacro(NumberOfOutputs,int);

  void UnRegisterAllOutputs(void);

  int GetOutputIndex(vtkDataObject *out);

  virtual void SetExecutive(vtkExecutive* executive);


  virtual int ProcessRequest(vtkInformation*,
                                       vtkInformationVector*,
                                       vtkInformationVector*);

protected:
  vtkSource();
  ~vtkSource();

  virtual void ExecuteData(vtkDataObject *output);

  int UpdateExtentIsEmpty(vtkDataObject *output);

  virtual void Execute();

  // By default, UpdateInformation calls this method to copy information
  // unmodified from the input to the output.
  virtual void ExecuteInformation();

  // Called after ExecuteData to call DataHasBeenGenerated on the
  // outputs.  It can be overridden by subclasses to call
  // DataHasBeenGenerated on only a subset of the outputs.  The
  // argument is the pointer to the output data object that was passed
  // to ExecuteData.
  virtual void MarkGeneratedOutputs(vtkDataObject*);

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

  // method used internally for getting an output.
  vtkDataObject *GetOutput(int idx);

  // protected methods for setting inputs.
  virtual void SetNthOutput(int num, vtkDataObject *output);
  virtual void AddOutput(vtkDataObject *output);
  virtual void RemoveOutput(vtkDataObject *output);
  
  vtkDataObject **Outputs;     // An Array of the outputs to the filter
  int NumberOfOutputs;
  int Updating;
  // Time when ExecuteInformation was last called.
  vtkTimeStamp InformationTime;

  virtual void ReportReferences(vtkGarbageCollector*);
  virtual void RemoveReferences();

  // Output port information must match the current outputs.
  int FillOutputPortInformation(int, vtkInformation*);

  // Reimplemented from vtkAlgorithm to maintain backward
  // compatibility for vtkProcessObject.
  virtual void SetNumberOfOutputPorts(int n);

  //BTX
  friend class vtkDistributedExecutive;
  //ETX

private:
  vtkSource(const vtkSource&);  // Not implemented.
  void operator=(const vtkSource&);  // Not implemented.
};

#endif

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