00001 /*======================================================================= 00002 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.), *** 00003 *** AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT. *** 00004 *** *** 00005 *** REPRODUCTION, DISCLOSURE, OR USE, IN WHOLE OR IN PART, OTHER THAN AS *** 00006 *** SPECIFIED IN THE LICENSE ARE NOT TO BE UNDERTAKEN EXCEPT WITH PRIOR *** 00007 *** WRITTEN AUTHORIZATION OF FEI S.A.S. *** 00008 *** *** 00009 *** RESTRICTED RIGHTS LEGEND *** 00010 *** USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS *** 00011 *** WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN *** 00012 *** SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT *** 00013 *** CLAUSE AT FAR 52.227-19 OR SUBPARAGRAPH (C)(1)(II) OF THE RIGHTS IN *** 00014 *** TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013. *** 00015 *** *** 00016 *** COPYRIGHT (C) 1996-2020 BY FEI S.A.S, *** 00017 *** BORDEAUX, FRANCE *** 00018 *** ALL RIGHTS RESERVED *** 00019 **=======================================================================*/ 00020 /*======================================================================= 00021 ** Author : Thibaut Andrieu (Jan 2011) 00022 **=======================================================================*/ 00023 00024 #if !defined _SO_ELLIPSE_SCREEN_DRAWER_H_ 00025 #define _SO_ELLIPSE_SCREEN_DRAWER_H_ 00026 00027 00028 #include <Inventor/drawers/SoPolyLineScreenDrawer.h> 00029 #include <Inventor/fields/SoSFEnum.h> 00030 00091 class SoEllipseScreenDrawer : public SoPolyLineScreenDrawer 00092 { 00093 SO_NODE_HEADER( SoEllipseScreenDrawer ); 00094 00095 public: 00097 SoEllipseScreenDrawer(); 00098 00102 enum CreationMethod 00103 { 00105 CORNER_CORNER, 00107 CENTER_CORNER 00108 }; 00109 00113 SoSFEnum method; 00114 00118 SoSFUInt32 nbPoint; 00119 00120 private: 00121 00123 static void initClass(); 00124 00126 static void exitClass(); 00127 00128 SoEXTENDER_Documented private: 00129 00131 virtual void onKeyDown( SoHandleEventAction* action ); 00132 00134 virtual void onMouseDragging( SoHandleEventAction* action ); 00135 00137 virtual void onMouseDown( SoHandleEventAction* action ); 00138 00140 virtual void onMouseUp( SoHandleEventAction* action ); 00141 00143 inline bool isCreating() const { return m_initPoint[0] != -1 && m_initPoint[1] != -1; } 00144 00145 private: 00146 00148 virtual ~SoEllipseScreenDrawer(); 00149 00150 private: 00151 00159 void getEllipseParameters( const SbVec2f& currentPoint, 00160 float& xRadius, 00161 float& yRadius, 00162 SbVec2f& center ) const; 00163 00168 SbVec2f m_initPoint; 00169 00170 }; 00171 00172 00173 #endif // _SO_ELLIPSE_SCREEN_DRAWER_H_ 00174 00175 00176