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/*=========================================================================
Program: Visualization Toolkit
Module: vtkProgrammableDataObjectSource.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 vtkProgrammableDataObjectSource - generate source data object via a user-specified function
// .SECTION Description
// vtkProgrammableDataObjectSource is a source object that is programmable by
// the user. The output of the filter is a data object (vtkDataObject) which
// represents data via an instance of field data. To use this object, you
// must specify a function that creates the output.
//
// Example use of this filter includes reading tabular data and encoding it
// as vtkFieldData. You can then use filters like vtkDataObjectToDataSetFilter
// to convert the data object to a dataset and then visualize it. Another
// important use of this class is that it allows users of interpreters (e.g.,
// Tcl or Java) the ability to write source objects without having to
// recompile C++ code or generate new libraries.
//
// .SECTION See Also
// vtkProgrammableFilter vtkProgrammableAttributeDataFilter
// vtkProgrammableSource vtkDataObjectToDataSetFilter
#ifndef __vtkProgrammableDataObjectSource_h
#define __vtkProgrammableDataObjectSource_h
#include "vtkDataObjectAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkProgrammableDataObjectSource : public vtkDataObjectAlgorithm
{
public:
static vtkProgrammableDataObjectSource *New();
vtkTypeMacro(vtkProgrammableDataObjectSource,vtkDataObjectAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Signature definition for programmable method callbacks. Methods passed to
// SetExecuteMethod or SetExecuteMethodArgDelete must conform to this
// signature.
// The presence of this typedef is useful for reference and for external
// analysis tools, but it cannot be used in the method signatures in these
// header files themselves because it prevents the internal VTK wrapper
// generators from wrapping these methods.
typedef void (*ProgrammableMethodCallbackType)(void *arg);
// Description:
// Specify the function to use to generate the output data object. Note
// that the function takes a single (void *) argument.
void SetExecuteMethod(void (*f)(void *), void *arg);
// Description:
// Set the arg delete method. This is used to free user memory.
void SetExecuteMethodArgDelete(void (*f)(void *));
protected:
vtkProgrammableDataObjectSource();
~vtkProgrammableDataObjectSource();
virtual int RequestData(vtkInformation *, vtkInformationVector **,
vtkInformationVector *);
ProgrammableMethodCallbackType ExecuteMethod; //function to invoke
ProgrammableMethodCallbackType ExecuteMethodArgDelete;
void *ExecuteMethodArg;
private:
vtkProgrammableDataObjectSource(const vtkProgrammableDataObjectSource&); // Not implemented.
void operator=(const vtkProgrammableDataObjectSource&); // Not implemented.
};
#endif
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