/*=========================================================================
                                                                                
  Program:   bbtk
  Module:    $RCSfile: bbwxvtkViewer2D.cxx,v $
  Language:  C++
  Date:      $Date: 2008/03/03 13:14:27 $
  Version:   $Revision: 1.1 $
                                                                                
  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
  l'Image). All rights reserved. See Doc/License.txt or
  http://www.creatis.insa-lyon.fr/Public/bbtk/License.html for details.
                                                                                
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.
                                                                                
=========================================================================*/
/**
 *  \file 
 *  \brief 
 */


#ifdef _USE_WXWIDGETS_


#include "bbwxvtkViewer2D.h"
#include "bbwxvtkPackage.h"
//#include <wx/dialog.h>

#include "vtkInteractorStyleImage.h"
#include "vtkCamera.h"
#include "vtkRenderer.h"




namespace bbwxvtk
{

  BBTK_ADD_BLACK_BOX_TO_PACKAGE(wxvtk,Viewer2D);
  

  Viewer2DWidget::Viewer2DWidget(Viewer2D* box,
				 wxWindow *parent)
    :  
    wxPanel( parent, -1, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL),
    mBox(box)
  {
    wxPanel *panel	= this;

    wxvtkrenderwindowinteractor = new wxVTKRenderWindowInteractor(panel,-1);
    wxvtkrenderwindowinteractor->UseCaptureMouseOn();	
    wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
    sizer	-> Add( wxvtkrenderwindowinteractor , 1, wxEXPAND, 0);
    panel	-> SetSizer(sizer);
    panel	-> SetAutoLayout(true);
    panel	-> Layout();
    
    backImageData	= NULL;
    imageViewer		= NULL;

    
  }
  //-------------------------------------------------------------------------
  
  Viewer2DWidget::~Viewer2DWidget()
  {
    delete wxvtkrenderwindowinteractor;
// pourquoi pas wxvtkrenderwindowinteractor->Delete(); // JP
  }
  
  //-------------------------------------------------------------------------
  



  void Viewer2DWidget::Update()
  {

    if (imageViewer==NULL){
      imageViewer	= vtkImageViewer2::New();
      imageViewer->SetupInteractor ( wxvtkrenderwindowinteractor );
    }

    // Viewer2D*  mbbtkViewer2D = (Viewer2D*)GetBlackBox();


    
    //  imageViewer->SetSliceOrientation(((Viewer2D*)GetBlackBox())->bbGetInputOrientation());
    

    if ( backImageData != mBox->bbGetInputIn() )
      {
	backImageData = mBox->bbGetInputIn();
	imageViewer->SetInput( backImageData );
	backImageData->Update();
	int x1,x2,y1,y2,z1,z2;
	double spx,spy,spz;
	backImageData->GetSpacing(spx,spy,spz);
	backImageData->GetExtent (x1,x2,y1,y2,z1,z2);
	
	bbtkMessage("Output",2,"Viewer2D '"<<mBox->bbGetName()<<"' - Image :"<<std::endl);
	bbtkMessage("Output",2," extent  = "<< x1<<"-"<<x2<<" x "<<y1<<"-"<<y2<<" x "<<z1<<"-"<<z2<<std::endl);
	bbtkMessage("Output",2," spacing = "<<spx << " - "<< spy << " - "<<spz<<std::endl);

	vtkCamera *camera = imageViewer->GetRenderer()->GetActiveCamera();

	camera->SetViewUp ( spx*0, -spy*1, spz*0);
	camera->SetPosition( spx*(x1+x2)/2, spy*(y1+y2)/2, -spz*10000000); 
	camera->SetFocalPoint	( spx*(x1+x2)/2	, spy*(y1+y2)/2	, spz*0); 


	camera->ComputeViewPlaneNormal();
	camera->SetParallelScale(  spx*(x2-x1)/2.0 );
	//		imageViewer->GetRenderer()->ResetCamera(x1,x2,y1,y2,z1,z2);
      }
  
  
    if (backImageData!=NULL)
      {
	int z = mBox->bbGetInputSlice();

	int ext[6];
	backImageData->GetWholeExtent(ext);


	if (z<ext[4]) { z=ext[4]; }
	if (z>=ext[5]) { z=ext[5]-1; }
	// LG : SetZSlice does not exist anymore in vtk 5 !

#if (VTK_MAJOR_VERSION >= 5)
	imageViewer->SetSlice( z );
#else
	imageViewer->SetZSlice( z );
#endif

      }
    
    wxvtkrenderwindowinteractor->Render();
    //    wxvtkrenderwindowinteractor->Refresh();
    
    //    Refresh();
  }




  //--------------------------------------------------------------------------
  //-------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------


  BBTK_USER_BLACK_BOX_IMPLEMENTATION(Viewer2D,bbtk::WxBlackBox);


  void Viewer2D::Process() 
  { 
    ((Viewer2DWidget*)bbGetOutputWidget())->Update();
    bbSetOutputOut( bbGetInputSlice() );
  }
  

  /**
   * \brief  Create wxWidget . 
   *
   *
   */ 
  void Viewer2D::CreateWidget()
  {
    bbtkDebugMessageInc("Core",9,"Viewer2D::CreateWidget()"<<std::endl);

    Viewer2DWidget* w = new Viewer2DWidget(this,bbGetWxParent());
    w->Update();
    bbSetOutputWidget(w);

    bbtkDebugDecTab("Core",9);
  }


}//namespace bbtk

#endif