ProgressReport

VTKExamples/Cxx/Developers/ProgressReport

Description

This example demonstrates how to get the progress of a filter. This requires that the filter is updating its progress in a sensible way. A sample filter is provided which loops through the input points and updates its progress along the way.

Code

ProgressReport.cxx

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkSphereSource.h>
#include <vtkCallbackCommand.h>
#include <vtkCommand.h>

#include "vtkTestProgressReportFilter.h"

void ProgressFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData);

int main(int, char *[])
{ 
  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();

  vtkSmartPointer<vtkCallbackCommand> progressCallback = 
    vtkSmartPointer<vtkCallbackCommand>::New();
  progressCallback->SetCallback(ProgressFunction);

  vtkSmartPointer<vtkTestProgressReportFilter> testFilter = 
    vtkSmartPointer<vtkTestProgressReportFilter>::New();
  testFilter->SetInputConnection(sphereSource->GetOutputPort());
  testFilter->AddObserver(vtkCommand::ProgressEvent, progressCallback);
  testFilter->Update();

  return EXIT_SUCCESS;
}

void ProgressFunction ( vtkObject* caller,
                        long unsigned int vtkNotUsed(eventId),
                        void* vtkNotUsed(clientData),
                        void* vtkNotUsed(callData) )
{
  vtkTestProgressReportFilter* testFilter = static_cast<vtkTestProgressReportFilter*>(caller);
  std::cout << "Progress: " << testFilter->GetProgress() << std::endl;
}

vtkTestProgressReportFilter.h

#ifndef __vtkTestProgressReportFilter_h
#define __vtkTestProgressReportFilter_h

#include <vtkPolyDataAlgorithm.h>

class vtkTestProgressReportFilter : public vtkPolyDataAlgorithm
{
public:
  static vtkTestProgressReportFilter *New();
  vtkTypeMacro(vtkTestProgressReportFilter,vtkAlgorithm);

protected:
  vtkTestProgressReportFilter(){}
  ~vtkTestProgressReportFilter() VTK_OVERRIDE {}

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) VTK_OVERRIDE;

private:
  vtkTestProgressReportFilter(const vtkTestProgressReportFilter&) VTK_DELETE_FUNCTION;
  void operator=(const vtkTestProgressReportFilter&) VTK_DELETE_FUNCTION;

};

#endif

vtkTestProgressReportFilter.cxx

#include "vtkTestProgressReportFilter.h"

#include <vtkObjectFactory.h>
#include <vtkStreamingDemandDrivenPipeline.h>
#include <vtkInformationVector.h>
#include <vtkInformation.h>
#include <vtkDataObject.h>
#include <vtkSmartPointer.h>

vtkStandardNewMacro(vtkTestProgressReportFilter);

int vtkTestProgressReportFilter::RequestData(
  vtkInformation *vtkNotUsed(request),
  vtkInformationVector **inputVector,
  vtkInformationVector *outputVector)
{

  // Get the info objects
  vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation *outInfo = outputVector->GetInformationObject(0);


  // Get the input and ouptut
  vtkPolyData *input = vtkPolyData::SafeDownCast(
    inInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkPolyData *output = vtkPolyData::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  for(vtkIdType i = 0; i < input->GetNumberOfPoints(); i++)
  {
    this->UpdateProgress(static_cast<double>(i)/input->GetNumberOfPoints());
  }

  output->ShallowCopy(input);

  return 1;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ProgressReport)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(ProgressReport MACOSX_BUNDLE ProgressReport.cxx  vtkTestProgressReportFilter.cxx)

target_link_libraries(ProgressReport ${VTK_LIBRARIES})

Download and Build ProgressReport

Click here to download ProgressReport and its CMakeLists.txt file. Once the tarball ProgressReport.tar has been downloaded and extracted,

cd ProgressReport/build 

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ProgressReport

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.