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ThirdParty-6/ParaView-5.0.1/VTK/Common/ExecutionModel/vtkProgressObserver.h

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/*=========================================================================
Program: Visualization Toolkit
Module: vtkProgressObserver.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 vtkProgressObserver - Basic class to optionally replace vtkAlgorithm progress functionality.
// .SECTION Description
// When the basic functionality in vtkAlgorithm that reports progress is
// not enough, a subclass of vtkProgressObserver can be used to provide
// custom functionality.
// The main use case for this is when an algorithm's RequestData() is
// called from multiple threads in parallel - the basic functionality in
// vtkAlgorithm is not thread safe. vtkSMPProgressObserver can
// handle this situation by routing progress from each thread to a
// thread local vtkProgressObserver, which will invoke events separately
// for each thread.
#ifndef vtkProgressObserver_h
#define vtkProgressObserver_h
#include "vtkCommonExecutionModelModule.h" // For export macro
#include "vtkObject.h"
class VTKCOMMONEXECUTIONMODEL_EXPORT vtkProgressObserver : public vtkObject
{
public:
static vtkProgressObserver *New();
vtkTypeMacro(vtkProgressObserver,vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// The default behavior is to update the Progress data member
// and invoke a ProgressEvent. This is designed to be overwritten.
virtual void UpdateProgress(double amount);
// Description:
// Returns the progress reported by the algorithm.
vtkGetMacro(Progress, double);
protected:
vtkProgressObserver();
~vtkProgressObserver();
double Progress;
private:
vtkProgressObserver(const vtkProgressObserver&); // Not implemented.
void operator=(const vtkProgressObserver&); // Not implemented.
};
#endif