/****************************************************************************
* 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.                                                         *
*                                                                           *
****************************************************************************/

#ifndef __VCG_ALIGNPAIRWIDGET
#define __VCG_ALIGNPAIRWIDGET

#include <GL/glew.h>
#include <QObject>
#include <QDialog>
#include <QGLWidget>
#include <vcg/space/point2.h>
#include <wrap/gui/trackball.h>
class MeshTree;
class MeshNode;

class AlignPairWidget: public QGLWidget
{
	Q_OBJECT 
public:
	AlignPairWidget (QWidget * parent = 0);
	public slots:
		/// widget-based user interaction slots
signals:
		/// signal for setting the statusbar message
		void setStatusBar(QString message);
protected:
	/// opengl initialization and drawing calls
	void initializeGL ();
	void paintGL ();
	/// keyboard and mouse event callbacks
	void keyReleaseEvent(QKeyEvent * e);
	void keyPressEvent(QKeyEvent * e);
	void mousePressEvent(QMouseEvent*e);
	void mouseMoveEvent(QMouseEvent*e);
	void mouseReleaseEvent(QMouseEvent*e);
	void wheelEvent(QWheelEvent*e); 
	void mouseDoubleClickEvent(QMouseEvent * e);
	void drawPickedPoints(std::vector<vcg::Point3f> &, vcg::Color4b color);

private:
	/// the active mesh instance
	MeshNode* freeMesh;
	MeshTree* gluedTree;

	/// the active manipulator
	vcg::Trackball trackLeft,trackRight;
	vcg::Trackball* tt[2];
	vcg::Trackball* currentTrack;
public:	
	std::vector<vcg::Point3f> freePickedPointVec;
	std::vector<vcg::Point3f> gluedPickedPointVec;

	/// mesh data structure initializer
	bool hasToPick;
	bool hasToDelete;
	vcg::Point2i pointToPick;

	// use mesh vertex colors
	bool isUsingVertexColor;

	// force point rendering
	bool usePointRendering;
public:
	void initMesh(MeshNode *left, MeshTree *right);
};

#endif
