ITK/Examples/Utilities/ObserveEvent

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This example demonstrates how to observe and event that is invoked by a filter.

ObserveEvent.cxx

#include "itkBinaryNotImageFilter.h"
#include "itkCommand.h"
 
typedef itk::Image<unsigned char, 2>  ImageType;
 
class MyCommand : public itk::Command
{
  public:
    itkNewMacro( MyCommand );
 
  public:
 
    void Execute(itk::Object *caller, const itk::EventObject & event)
    {
      Execute( (const itk::Object *)caller, event);
    }
 
    void Execute(const itk::Object * object, const itk::EventObject & event)
    {
      std::cout << "Command called." << std::endl;
    }
 
};
 
int main(int, char*[])
{
  ImageType::Pointer image = ImageType::New();
  typedef itk::BinaryNotImageFilter <ImageType>
          BinaryNotImageFilterType;
 
  BinaryNotImageFilterType::Pointer filter = BinaryNotImageFilterType::New();
  filter->SetInput(image);
 
  MyCommand::Pointer myCommand = MyCommand::New();
  filter->AddObserver(itk::ProgressEvent(), myCommand);
 
  filter->Update();
 
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
project(ObserveEvent)
 
find_package(ITK REQUIRED)
include(${ITK_USE_FILE})
 
add_executable(ObserveEvent ObserveEvent.cxx)
 
if( "${ITK_VERSION_MAJOR}" LESS 4 )
  target_link_libraries(ObserveEvent ITKReview ${ITK_LIBRARIES})
else( "${ITK_VERSION_MAJOR}" LESS 4 )
  target_link_libraries(ObserveEvent ${ITK_LIBRARIES})
endif( "${ITK_VERSION_MAJOR}" LESS 4 )
Retrieved from "http://www.itk.org/Wiki/ITK/Examples/Utilities/ObserveEvent"
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