OpenMesh
OpenMesh/Apps/QtViewer/QGLViewerWidget.hh
00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
00005  *                           www.openmesh.org                                *
00006  *                                                                           *
00007  *---------------------------------------------------------------------------* 
00008  *  This file is part of OpenMesh.                                           *
00009  *                                                                           *
00010  *  OpenMesh is free software: you can redistribute it and/or modify         * 
00011  *  it under the terms of the GNU Lesser General Public License as           *
00012  *  published by the Free Software Foundation, either version 3 of           *
00013  *  the License, or (at your option) any later version with the              *
00014  *  following exceptions:                                                    *
00015  *                                                                           *
00016  *  If other files instantiate templates or use macros                       *
00017  *  or inline functions from this file, or you compile this file and         *
00018  *  link it with other files to produce an executable, this file does        *
00019  *  not by itself cause the resulting executable to be covered by the        *
00020  *  GNU Lesser General Public License. This exception does not however       *
00021  *  invalidate any other reasons why the executable file might be            *
00022  *  covered by the GNU Lesser General Public License.                        *
00023  *                                                                           *
00024  *  OpenMesh is distributed in the hope that it will be useful,              *
00025  *  but WITHOUT ANY WARRANTY; without even the implied warranty of           *
00026  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
00027  *  GNU Lesser General Public License for more details.                      *
00028  *                                                                           *
00029  *  You should have received a copy of the GNU LesserGeneral Public          *
00030  *  License along with OpenMesh.  If not,                                    *
00031  *  see <http://www.gnu.org/licenses/>.                                      *
00032  *                                                                           *
00033 \*===========================================================================*/ 
00034 
00035 /*===========================================================================*\
00036  *                                                                           *             
00037  *   $Revision: 362 $                                                         *
00038  *   $Date: 2011-01-26 10:21:12 +0100 (Mi, 26 Jan 2011) $                   *
00039  *                                                                           *
00040 \*===========================================================================*/
00041 
00042 
00043 #ifndef OPENMESHAPPS_QGLVIEWERWIDGET_HH
00044 #define OPENMESHAPPS_QGLVIEWERWIDGET_HH
00045 
00046 
00047 //== INCLUDES =================================================================
00048 
00049 
00050 #include <OpenMesh/Core/Geometry/VectorT.hh>
00051 #include <QtOpenGL/qgl.h>
00052 #include <string>
00053 #include <vector>
00054 #include <map>
00055 
00056 
00057 //== FORWARD DECLARATIONS =====================================================
00058 
00059 class QMenu;
00060 class QActionGroup;
00061 class QAction;
00062 
00063 //== CLASS DEFINITION =========================================================
00064 
00065   
00066 class QGLViewerWidget : public QGLWidget
00067 {
00068 
00069   Q_OBJECT
00070   
00071 public:
00072   typedef QGLWidget Super;
00073    
00074   // Default constructor.
00075   QGLViewerWidget( QWidget* _parent=0 );
00076 
00077   // 
00078   QGLViewerWidget( QGLFormat& _fmt, QWidget* _parent=0 );
00079 
00080   // Destructor.
00081   virtual ~QGLViewerWidget();
00082 
00083 private:
00084 
00085   void init(void);
00086 
00087 public:
00088 
00089   /* Sets the center and size of the whole scene. 
00090      The _center is used as fixpoint for rotations and for adjusting
00091      the camera/viewer (see view_all()). */
00092   void set_scene_pos( const OpenMesh::Vec3f& _center, float _radius );  
00093 
00094   /* view the whole scene: the eye point is moved far enough from the
00095      center so that the whole scene is visible. */
00096   void view_all();
00097 
00099   QAction *add_draw_mode(const std::string& _s);
00100 
00102   void del_draw_mode(const std::string& _s);
00103 
00104   const std::string& current_draw_mode() const 
00105   { return draw_mode_ ? draw_mode_names_[draw_mode_-1] : nomode_; }
00106 
00107   float radius() const { return radius_; }
00108   const OpenMesh::Vec3f& center() const { return center_; }
00109 
00110   const GLdouble* modelview_matrix() const  { return modelview_matrix_;  }
00111   const GLdouble* projection_matrix() const { return projection_matrix_; }
00112 
00113   float fovy() const { return 45.0f; }
00114 
00115   QAction* findAction(const char *name);
00116   void addAction(QAction* action, const char* name);
00117   void removeAction(const char* name);
00118   void removeAction(QAction* action);
00119 
00120 protected:
00121 
00122   // draw the scene: will be called by the painGL() method.
00123   virtual void draw_scene(const std::string& _draw_mode);
00124 
00125   double performance(void);
00126   
00127   void setDefaultMaterial(void);
00128   void setDefaultLight(void);
00129 
00130 private slots:  
00131 
00132   // popup menu clicked
00133   void slotDrawMode(QAction *_mode);  
00134   void slotSnapshot( void );
00135 
00136   
00137 private: // inherited
00138 
00139   // initialize OpenGL states (triggered by Qt)
00140   void initializeGL();
00141 
00142   // draw the scene (triggered by Qt)
00143   void paintGL();
00144 
00145   // handle resize events (triggered by Qt)
00146   void resizeGL( int w, int h );
00147 
00148 protected:
00149    
00150   // Qt mouse events
00151   virtual void mousePressEvent( QMouseEvent* );
00152   virtual void mouseReleaseEvent( QMouseEvent* );
00153   virtual void mouseMoveEvent( QMouseEvent* );
00154   virtual void wheelEvent( QWheelEvent* );
00155   virtual void keyPressEvent( QKeyEvent* );
00156 
00157 private:
00158    
00159   // updates projection matrix
00160   void update_projection_matrix();
00161 
00162   // translate the scene and update modelview matrix
00163   void translate(const OpenMesh::Vec3f& _trans);
00164 
00165   // rotate the scene (around its center) and update modelview matrix
00166   void rotate(const OpenMesh::Vec3f& _axis, float _angle);
00167 
00168   OpenMesh::Vec3f  center_;
00169   float            radius_;
00170               
00171   GLdouble    projection_matrix_[16],
00172               modelview_matrix_[16];
00173 
00174 
00175   // popup menu for draw mode selection
00176   QMenu*               popup_menu_;
00177   QActionGroup*        draw_modes_group_;
00178   typedef std::map<QString,QAction*> ActionMap;
00179   ActionMap            names_to_actions;
00180   unsigned int              draw_mode_;
00181   unsigned int              n_draw_modes_;
00182   std::vector<std::string>  draw_mode_names_;
00183   static std::string        nomode_;
00184 
00185 
00186 
00187   // virtual trackball: map 2D screen point to unit sphere
00188   bool map_to_sphere(const QPoint& _point, OpenMesh::Vec3f& _result);
00189 
00190   QPoint           last_point_2D_;
00191   OpenMesh::Vec3f  last_point_3D_;
00192   bool             last_point_ok_;
00193 
00194 };
00195 
00196 
00197 //=============================================================================
00198 #endif // OPENMESHAPPS_QGLVIEWERWIDGET_HH
00199 //=============================================================================
00200