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 *   Copyright (C) 2005 by                                                 *
 *   Lisandro Damián Nicanor Pérez Meyer - perezmeyer en/at gmail.com      *
 *   Gustavo González - gonzalgustavo en/at gmail.com                      *
 *   Pablo Odorico  pablo.odorico en/at gmail.com                          *
 *                                                                         *
 *   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        *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *

#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QtOpenGL/QGLWidget>
#include "datamanager.h"
#include "camera.h"
      This class inherits from QGLWidget, and it is used to diaplay the OGL view
      in the program. It also takes cares of some events, wich it then passes to
      the class camera.
00034 class GLWidget : public QGLWidget

      GLWidget(QWidget * parent = 0);

      void setFileRender(bool newVal);
      QPixmap snapshot(int width, int height);

      // Grid
      void makeGrid(GLfloat z, GLfloat size, GLfloat radio);
      void renderGrid();

public slots:
      void makeCurrentGLWidget();

      void RenderSurface();
      void setStatus(QString status, int timeout = 2000);
      void rebuildLists();

      void initializeGL();
      void paintGL();
      void resizeGL(int width, int height);

      // Mouse/Keyboard input
      void mousePressEvent(QMouseEvent *event);
      void mouseMoveEvent(QMouseEvent *event);
      void wheelEvent(QWheelEvent *event);
      void keyPressEvent (QKeyEvent *event);
      void keyReleaseEvent(QKeyEvent *event);

      void grabInput();
      void releaseInput();
      /// Number of true elements of movingTo[]
      int movingCount();
      /// make movingTo false
      void stopMoving();

private slots:
      void sceneTimerEvent();

      /// Camera
00081       Camera camera;

      /// Step for changing camera.rhoOrbit (with the mouse wheel)
00084       static const float zoomStep= 0.1;

      /// sceneTimer is used to simulate a fast auto-repeat event and
      /// as a scene timer
00088       static const int timerDelay = 13;
      QTimer *sceneTimer;
      /// Key state (WDSA)
00091       static const int movingDirections = 4;
      bool movingTo[movingDirections];

      /// Mouse Grabbing information
00095       static const float sensibility= 0.1;
      bool mouseGrabbed;
      /// Did the camera moved while the input was grabbed
00098       bool movedWhileGrabbed;
      QPoint grabPos;
      QPoint lastPos;

      /// A list index for the grid
00103       GLuint gridList;

      /// If true, initializeGL will emit rebuildLists. This is needed given
      /// that QGLWidget::renderPixmaps creates a new QGLContext
00107       bool fileRender;

#endif // GLWIDGET_H

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