// =========================================================================
// @author Leonardo Florez Valencia
// @email florez-l@javeriana.edu.co
// =========================================================================
#ifndef __fpa__Filters__RegionGrow__h__
#define __fpa__Filters__RegionGrow__h__

#include <deque>
#include <itkConceptChecking.h>
#include <itkFunctionBase.h>
#include <fpa/Filters/Algorithm.h>
#include <fpa/Functors/BaseVertexFunction.h>

namespace fpa
{
  namespace Filters
  {
    /**
     */
    template< class _TTraits >
    class RegionGrow
      : public fpa::Filters::Algorithm< _TTraits >
    {
    public:
      typedef _TTraits TTraits;
      fpaTraitsMacro( typename, TTraits );

      typedef fpa::Filters::Algorithm< TTraits > Superclass;
      typedef RegionGrow                         Self;
      typedef itk::SmartPointer< Self >          Pointer;
      typedef itk::SmartPointer< const Self >    ConstPointer;

      typedef std::deque< TNode >                    TQueue;
      typedef itk::FunctionBase< TInputValue, bool > TScalarPredicate;
      typedef fpa::Functors::BaseVertexFunction< TVertex, bool > TVertexPredicate;

    protected:
      itkConceptMacro(
        Check_TOutputValue,
        ( itk::Concept::IsUnsignedInteger< TOutputValue > )
        );

    public:
      itkTypeMacro( fpa::Filters::RegionGrow, fpa::Filters::Algorithm );

      itkGetConstObjectMacro( ScalarPredicate, TScalarPredicate );
      itkGetObjectMacro( ScalarPredicate, TScalarPredicate );

      itkGetConstObjectMacro( VertexPredicate, TVertexPredicate );
      itkGetObjectMacro( VertexPredicate, TVertexPredicate );

      itkGetConstMacro( InsideValue, TOutputValue );
      itkSetMacro( InsideValue, TOutputValue );

    public:
      void SetPredicate( TScalarPredicate* p );
      void SetPredicate( TVertexPredicate* p );

      TOutputValue GetOutsideValue( ) const;
      void SetOutsideValue( const TOutputValue& v );

    protected:
      RegionGrow( );
      virtual ~RegionGrow( );

      virtual void _UpdateOutputValue( TNode& n ) override;
      virtual void _QueueClear( ) override;
      virtual TNode _QueuePop( ) override;
      virtual void _QueuePush( const TNode& n ) override;
      virtual unsigned long _QueueSize( ) const override;
      virtual void _ComputeOutputValue( TNode& n ) override;

    private:
      // Purposely not implemented.
      RegionGrow( const Self& other );
      Self& operator=( const Self& other );

    protected:
      typename TScalarPredicate::Pointer m_ScalarPredicate;
      typename TVertexPredicate::Pointer m_VertexPredicate;

      TOutputValue m_InsideValue;
      TQueue       m_Queue;
    };

  } // ecapseman

} // ecapseman

#ifndef ITK_MANUAL_INSTANTIATION
#  include <fpa/Filters/RegionGrow.hxx>
#endif // ITK_MANUAL_INSTANTIATION

#endif // __fpa__Filters__RegionGrow__h__
// eof - $RCSfile$