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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPythonAlgorithm.h
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.
=========================================================================*/
// .NAME vtkPythonAlgorithm - algorithm that can be implemented in Python
// .SECTION Description
// vtkPythonAlgorithm is an algorithm that calls a Python object to do the actual
// work.
// It defers the following methods to Python:
// - ProcessRequest()
// - FillInputPortInformation()
// - FillOutputPortInformation()
//
// Python signature of these methods is as follows:
// - ProcessRequest(self, vtkself, request, inInfo, outInfo) : vtkself is the vtk object, inInfo is a tuple of information objects
// - FillInputPortInformation(self, vtkself, port, info)
// - FillOutputPortInformation(self, vtkself, port, info)
// - Initialize(self, vtkself)
//
// In addition, it calls an Initialize() method when setting the Python
// object, which allows the initialization of number of input and output
// ports etc.
// .SECTION See Also
// vtkProgrammableFilter
#ifndef vtkPythonAlgorithm_h
#define vtkPythonAlgorithm_h
#include "vtkPython.h" // Must be first
#include "vtkFiltersPythonModule.h" // For export macro
#include "vtkAlgorithm.h"
class vtkSmartPyObject;
class VTKFILTERSPYTHON_EXPORT vtkPythonAlgorithm : public vtkAlgorithm
{
public:
static vtkPythonAlgorithm *New();
vtkTypeMacro(vtkPythonAlgorithm, vtkAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Specify the Python object to use to operate on the data. A reference will
// be taken on the object. This will also invoke Initialize() on the Python
// object, which is commonly used to set the number of input and output
// ports as well as perform tasks commonly performed in the constructor
// of C++ algorithm subclass.
void SetPythonObject(PyObject* obj);
// Description:
// Set the number of input ports used by the algorithm.
// This is made public so that it can be called from Python.
virtual void SetNumberOfInputPorts(int n);
// Description:
// Set the number of output ports provided by the algorithm.
// This is made public so that it can be called from Python.
virtual void SetNumberOfOutputPorts(int n);
protected:
vtkPythonAlgorithm();
~vtkPythonAlgorithm();
virtual int ProcessRequest(vtkInformation* request,
vtkInformationVector** inInfo,
vtkInformationVector* outInfo);
virtual int FillInputPortInformation(int port, vtkInformation* info);
virtual int FillOutputPortInformation(int port, vtkInformation* info);
private:
vtkPythonAlgorithm(const vtkPythonAlgorithm&); // Not implemented.
void operator=(const vtkPythonAlgorithm&); // Not implemented.
int CheckResult(const char* method, const vtkSmartPyObject& res);
PyObject* Object;
};
#endif
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