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#ifndef OPENMESHAPPS_DECIMATERVIEWERWIDGET_HH
#define OPENMESHAPPS_DECIMATERVIEWERWIDGET_HH


//== INCLUDES =================================================================

#if !defined(OM_USE_OSG)
#  define OM_USE_OSG 0
#endif


#include <qtimer.h>
#include <string>
#include <memory>

//--------------------
#include <OpenMesh/Core/IO/MeshIO.hh>
//--------------------
#if OM_USE_OSG
#  include <OpenMesh/Tools/Kernel_OSG/TriMesh_OSGArrayKernelT.hh>
#  define DEFAULT_TRAITS Kernel_OSG::Traits
#  define TRIMESH_KERNEL Kernel_OSG::TriMesh_OSGArrayKernelT
#else
//--------------------
#  include <OpenMesh/Core/Mesh/Traits.hh>
#  include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
#  define DEFAULT_TRAITS DefaultTraits
#  define TRIMESH_KERNEL TriMesh_ArrayKernelT
#endif

#include <OpenMesh/Apps/QtViewer/MeshViewerWidgetT.hh>

#include <OpenMesh/Tools/Decimater/DecimaterT.hh>
#include <OpenMesh/Tools/Decimater/ModNormalFlippingT.hh>
#include <OpenMesh/Tools/Decimater/ModQuadricT.hh>


//== CLASS DEFINITION =========================================================


using namespace OpenMesh;

struct MyTraits : public DEFAULT_TRAITS
{
  VertexAttributes  ( Attributes::Normal       );
  FaceAttributes    ( Attributes::Normal       );  
};

typedef TRIMESH_KERNEL<MyTraits>                     mesh_t;
typedef MeshViewerWidgetT<mesh_t>                    MeshViewerWidgetDecimaterBase;

//== CLASS DEFINITION =========================================================


class DecimaterViewerWidget : public MeshViewerWidgetDecimaterBase
{
  Q_OBJECT
   
public:
  
  typedef MeshViewerWidgetDecimaterBase inherited_t;

  typedef Decimater::DecimaterT<mesh_t>                decimater_t;  
  typedef Decimater::ModQuadricT< mesh_t >::Handle        mod_quadric_t;
  typedef Decimater::ModNormalFlippingT< mesh_t >::Handle mod_nf_t;

  // object types
#if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || __cplusplus > 199711L || defined(__GXX_EXPERIMENTAL_CXX0X__)
  typedef std::unique_ptr< decimater_t   >   decimater_o;
#else
  typedef std::auto_ptr< decimater_t   >   decimater_o;
#endif



  /// default constructor
  explicit DecimaterViewerWidget(QWidget* _parent=0)
    : MeshViewerWidgetDecimaterBase(_parent),
      animate_(false),
      timer_(0),
      steps_(1)
  {
    timer_ = new QTimer(this);
    
    connect( timer_, SIGNAL(timeout()), SLOT(animate()) );
  }
  
  DecimaterViewerWidget() :
          animate_(false),
          timer_(0),
          steps_(0)
  {
  }

  /// destructor
  ~DecimaterViewerWidget()
  {
    delete timer_;
  }

public: // inherited

  bool open_mesh(const char* _filename, OpenMesh::IO::Options _opt) override
  {
    bool rc;

    if ( (rc = inherited_t::open_mesh( _filename, _opt )) )
    {
      std::cout << "prepare decimater" << std::endl;

      decimater_ = decimater_o ( new decimater_t  ( mesh() ) );

      decimater_->add(mod_quadric_);
      decimater_->module(mod_quadric_).set_binary(false);

      decimater_->add(mod_nf_);

      decimater_->initialize();
    }
    return rc;
  }
  
protected slots:

  void animate( void );

protected:   

  virtual void keyPressEvent(QKeyEvent* _event) override;


private:
  
  bool              animate_;
  QTimer           *timer_;

  decimater_o       decimater_;  
  mod_quadric_t     mod_quadric_;
  mod_nf_t          mod_nf_;

  size_t            steps_;
};


//=============================================================================
#endif // OPENMESHAPPS_DECIMATERVIEWERWIDGET_HH defined
//=============================================================================

