#include <plugins/Widgets/SplineWidget.h>
#include <cpPlugins/DataObjects/Image.h>
#include <cpPlugins/DataObjects/Mesh.h>
#include <cpExtensions/Visualization/WindowLevelImageActor.h>

#include <vtkImageData.h>
#include <vtkRenderer.h>
#include <vtkSplineWidget.h>

// -------------------------------------------------------------------------
cpPluginsWidgets::SplineWidget::
SplineWidget( )
  : Superclass( ),
    m_Configured( false )
{
  typedef cpPlugins::BaseObjects::DataObject _TData;
  typedef cpPlugins::DataObjects::Mesh       _TMesh;

  this->_ConfigureInput< _TData >( "Input", false, false );
  this->_ConfigureOutput< _TMesh >( "Output" );
  this->m_Contour = vtkSmartPointer< vtkPolyData >::New( );
  this->m_Contour->SetPoints( vtkSmartPointer< vtkPoints >::New( ) );
  this->m_Contour->SetVerts( vtkSmartPointer< vtkCellArray >::New( ) );
  this->m_Contour->SetLines( vtkSmartPointer< vtkCellArray >::New( ) );
  this->m_Contour->SetPolys( vtkSmartPointer< vtkCellArray >::New( ) );
  this->m_Contour->SetStrips( vtkSmartPointer< vtkCellArray >::New( ) );
  this->GetOutput( "Output" )->SetVTK( this->m_Contour );
}

// -------------------------------------------------------------------------
cpPluginsWidgets::SplineWidget::
~SplineWidget( )
{
}

// -------------------------------------------------------------------------
void cpPluginsWidgets::SplineWidget::
_GenerateData( )
{
  typedef cpExtensions::Visualization::WindowLevelImageActor _TActor;

  auto image = this->GetInputData< vtkImageData >( "Input" );
  if( image == NULL )
    this->_Error( "Invalid input image." );
  if( this->m_Interactors.size( ) == 0 )
    this->_Error( "Give at least one interactor." );

  auto wdg = this->_CreateVTK< vtkSplineWidget >( );
  if( this->m_Configured )
  {
    wdg->GetPolyData( this->m_Contour.GetPointer( ) );
    wdg->Off( );
  }
  else
  {
    auto iIt = this->m_Interactors.begin( );
    vtkRenderWindowInteractor* iren = NULL;
    vtkRenderer* ren = NULL;
    _TActor* actor = NULL;
    for( ; iIt != this->m_Interactors.end( ); ++iIt )
    {
      auto r = ( *iIt )->GetInteractorStyle( )->GetCurrentRenderer( );
      if( r != NULL )
      {
        auto props = r->GetViewProps( );
        if( props != NULL )
        {
          props->InitTraversal( );
          while( vtkProp* prop = props->GetNextProp( ) )
          {
            auto a = dynamic_cast< _TActor* >( prop );
            if( a != NULL )
              if( a->GetImage( ) == image )
              {
                iren = *iIt;
                actor = a;
                ren = r;

              } // fi

          } // elihw

        } // fi

      } // fi

    } // rof
    if( actor == NULL || ren == NULL || iren == NULL )
      this->_Error( "Invalid actor and/or renderer." );

    // Widget configuration
    wdg->SetCurrentRenderer( ren );
    wdg->SetDefaultRenderer( ren );
    wdg->SetInputData( image );
    wdg->SetProp3D( actor );
    wdg->SetInteractor( iren );
    double bnds[ 6 ];
    image->GetBounds( bnds );
    wdg->PlaceWidget(
      bnds[ 0 ], bnds[ 1 ],
      bnds[ 2 ], bnds[ 3 ],
      bnds[ 4 ], bnds[ 5 ]
      );
    wdg->ProjectToPlaneOn( );
    wdg->SetProjectionNormalToZAxes( );
    wdg->SetProjectionPosition(
      (
        actor->GetBounds( )[ 4 ] +
        actor->GetBounds( )[ 5 ]
        ) / double( 2 )
      );
    wdg->SetHandleSize( 0.005 );
    wdg->SetNumberOfHandles( 3 );
    wdg->On( );
    this->m_Configured = true;

  } // fi
}

// eof - $RCSfile$