/****************************************************************************
 * MeshLab                                                           o o     *
 * A versatile mesh processing toolbox                             o     o   *
 *                                                                _   O  _   *
 * Copyright(C) 2005                                                \/)\/    *
 * Visual Computing Lab                                            /\/|      *
 * ISTI - Italian National Research Council                           |      *
 *                                                                    \      *
 * All rights reserved.                                                      *
 *                                                                           *
 * This program is free software; you can redistribute it and/or modify      *   
 * it under the terms of the GNU General Public License as published by      *
 * the Free Software Foundation; either version 2 of the License, or         *
 * (at your option) any later version.                                       *
 *                                                                           *
 * This program is distributed in the hope that it will be useful,           *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
 * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
 * for more details.                                                         *
 *                                                                           *
 ****************************************************************************/
/****************************************************************************
  History
$Log: meshedit.cpp,v $
****************************************************************************/
#include <QtGui>

#include <math.h>
#include <stdlib.h>
#include <meshlab/glarea.h>
#include "sampleedit.h"
#include <wrap/gl/pick.h>
#include<vcg/complex/trimesh/append.h>

using namespace std;
using namespace vcg;

SampleEditPlugin::SampleEditPlugin() {
	qFont.setFamily("Helvetica");
	qFont.setPixelSize(12);    
}

const QString SampleEditPlugin::Info() 
{
	return tr("Return detailed info about a picked face of the model.");
}
 
void SampleEditPlugin::mouseReleaseEvent(QMouseEvent * event, MeshModel &/*m*/, GLArea * gla)
{
	gla->update();
	cur=event->pos();
	haveToPick=true;
}
  
void SampleEditPlugin::Decorate(MeshModel &m, GLArea * gla, QPainter *p)
{
	if(haveToPick)
	{
		glPushMatrix();
		glMultMatrix(m.cm.Tr);
		vector<CMeshO::FacePointer> NewSel;  
		GLPickTri<CMeshO>::PickFace(cur.x(), gla->height() - cur.y(), m.cm, NewSel);
		if(NewSel.size()>0)
		curFacePtr=NewSel.front();
		haveToPick=false;
		glPopMatrix();
	}   
 if(curFacePtr)
 {
	glPushMatrix();
	glMultMatrix(m.cm.Tr);
	glPushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT | GL_LINE_BIT | GL_DEPTH_BUFFER_BIT);
	glLineWidth(2.0f);
	glDepthFunc(GL_ALWAYS);
	glDisable(GL_DEPTH_TEST); 
	glDepthMask(GL_FALSE);
	
	glDisable(GL_LIGHTING);
	glColor(Color4b::DarkRed);
  glBegin(GL_LINE_LOOP);
    glVertex(curFacePtr->P(0));
    glVertex(curFacePtr->P(1));
    glVertex(curFacePtr->P(2));
  glEnd();

	glDepthMask(GL_TRUE);
	glEnable(GL_DEPTH_TEST); 
	glDepthFunc(GL_LESS);
	glColor(Color4b::Red);
  glBegin(GL_LINE_LOOP);
    glVertex(curFacePtr->P(0));
    glVertex(curFacePtr->P(1));
    glVertex(curFacePtr->P(2));
  glEnd();

  drawFace(curFacePtr,m,gla,p);

  glPopAttrib();
	glPopMatrix();
 }
}

void SampleEditPlugin::drawFace(CMeshO::FacePointer fp, MeshModel &m, GLArea *gla, QPainter *p)
{

  glDepthMask(GL_FALSE);
  glDisable(GL_DEPTH_TEST);
  p->endNativePainting();
  p->save();
  p->setRenderHint(QPainter::TextAntialiasing);
  p->setPen(Qt::white);
  QFont qFont;
  qFont.setStyleStrategy(QFont::NoAntialias);
  qFont.setFamily("Helvetica");
  qFont.setPixelSize(12);
  p->setFont(qFont);

  QString buf;
  buf+=QString("f%1\n (%3 %4 %5)").arg(tri::Index(m.cm,fp)).arg(tri::Index(m.cm,fp->V(0))).arg(tri::Index(m.cm,fp->V(1))).arg(tri::Index(m.cm,fp->V(2)));
  Point3f c=Barycenter(*fp);
  for(int i=0;i<3;++i)
    {
       buf+=QString("\nv%1:%2 (%3 %4 %5)").arg(i).arg(fp->V(i) - &m.cm.vert[0]).arg(fp->P(i)[0]).arg(fp->P(i)[1]).arg(fp->P(i)[2]);
      if( m.hasDataMask(MeshModel::MM_VERTQUALITY) )
        buf+=QString(" - Q(%1)").arg(fp->V(i)->Q());
      if( m.hasDataMask(MeshModel::MM_WEDGTEXCOORD) )
          buf+=QString("- uv(%1 %2) id:%3").arg(fp->WT(i).U()).arg(fp->WT(i).V()).arg(fp->WT(i).N());
    }

  p->drawText(QRect(0,0,gla->width(),gla->height()), Qt::AlignLeft | Qt::TextWordWrap, buf);
  p->restore();
  p->beginNativePainting();
}

bool SampleEditPlugin::StartEdit(MeshModel &/*m*/, GLArea *gla )
{
  curFacePtr=0;
	gla->setCursor(QCursor(QPixmap(":/images/cur_info.png"),1,1));	
	return true;
}