#include "Viewer.h"
#include <math.h>
#include <iostream>
#include <qfiledialog.h>
#include <qmessagebox.h> 

using namespace std;
using namespace X3DTK::MESH;

Viewer::Viewer()
{
}

void Viewer::keyPressEvent(QKeyEvent *e)
{
  switch (e->key())
  {
    case Qt::Key_L : loadFile(); break;
    default        : QGLViewer::keyPressEvent(e);
  }
  updateGL();  
}

void Viewer::loadFile()
{
  QString name = QFileDialog::getOpenFileName("", "X3D files (*.x3d *.X3D);;All files (*)", this);
  
  // In case of Cancel
  if (name.isEmpty())
    return;

  // Loads the file name.
  scene.load(name);
  computeVerticesDistance(scene.getMesh());
  
  // QGLViewer settings.
  setSceneBoundingBox(scene.getBBoxMin(), scene.getBBoxMax());
  showEntireScene(); 
}

void Viewer::init()
{
  glPolygonOffset(-2.0, -2.0);
#ifdef GL_RESCALE_NORMAL
  glEnable(GL_RESCALE_NORMAL);
#endif

  loadFile();
}

void Viewer::draw()
{
  if (scene.getMesh() == 0) return;
  
  drawer.drawFaces(scene.getMesh());
}

QString Viewer::helpString() const
{
  QString message("");
  
  message += "<b>L</b>" + QString(" loads a new file<br>");
  
  message += QGLViewer::helpString();
  
  return message;
}

void Viewer::help() const
{
  QMessageBox *mb = new QMessageBox("help", helpString(), QMessageBox::NoIcon,QMessageBox::Ok | QMessageBox::Default, QMessageBox::NoButton,QMessageBox::NoButton, NULL, "Help", false,Qt::WStyle_DialogBorder | Qt::WType_Dialog | Qt::WDestructiveClose);
  mb->show();
}