# vtkTestFilterSelfProgressFilter

VTKExamples/Cxx/Developers/vtkTestFilterSelfProgressFilter

### Code

vtkTestFilterSelfProgressFilter.cxx

    #include "vtkSmartPointer.h"

    #include "vtkObjectFactory.h"
    #include "vtkStreamingDemandDrivenPipeline.h"
    #include "vtkInformationVector.h"
    #include "vtkInformation.h"
    #include "vtkDataObject.h"
    #include "vtkCallbackCommand.h"

    #include "vtkTestFilterSelfProgressFilter.h"

    vtkStandardNewMacro(vtkTestFilterSelfProgressFilter);

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

      this->AddObserver(vtkCommand::ProgressEvent, progressCallback);
    }

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

    int vtkTestFilterSelfProgressFilter::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(vtkTestFilterSelfProgressFilter)

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

    add_executable(vtkTestFilterSelfProgressFilter MACOSX_BUNDLE vtkTestFilterSelfProgressFilter.cxx)

    target_link_libraries(vtkTestFilterSelfProgressFilter ${VTK_LIBRARIES})

### Download and Build vtkTestFilterSelfProgressFilter

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

    cd vtkTestFilterSelfProgressFilter/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:

    ./vtkTestFilterSelfProgressFilter

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