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parametricgraph.h
00001 /*************************************************************************** 00002 parametricgraph.h - description 00003 ------------------- 00004 begin : Sun May 26 2002 00005 copyright : (C) 2002 by Fungmeista 00006 email : mizunoami44@users.sourceforge.net 00007 ***************************************************************************/ 00008 00009 /*************************************************************************** 00010 * * 00011 * This program is free software; you can redistribute it and/or modify * 00012 * it under the terms of the GNU General Public License as published by * 00013 * the Free Software Foundation; either version 2 of the License, or * 00014 * (at your option) any later version. * 00015 * * 00016 ***************************************************************************/ 00017 00018 #ifndef PARAMETRICGRAPH_H 00019 #define PARAMETRICGRAPH_H 00020 00021 #include "expressiongraph.h" 00022 00028 class ParametricGraph : public ExpressionGraph 00029 { 00030 Q_OBJECT 00031 00032 public: 00033 ParametricGraph(QWidget *parent=0, const char *name=0); 00034 ~ParametricGraph(); 00035 00036 virtual void load_key( const char *key, const char *value ); 00037 00038 int setTMin(double); 00039 int setTMax(double); 00040 int setTStep(double); 00041 inline double getTStep() const{return tStep;} 00042 inline double getTMin() const{return tMin;} 00043 inline double getTMax() const{return tMax;} 00044 00045 virtual void installMathFunctions(); 00046 virtual int execMathFunction( const char * ); 00047 00048 virtual inline int getGraphType() const{return PARAMETRICGRAPH;} 00049 00050 protected: 00051 virtual void updateCoords(); 00052 inline virtual const char * independent_vars(){return "t";} 00053 inline virtual const char * dependent_var(int i){return (i == X_VAR) ? "x" : "y";} 00054 00055 virtual int setXYForTrace(const double, const double, double *, double *, Expression &); 00056 virtual void putUndefinedMessage(double x, double y); 00057 //virtual void callDrawExpression(Expression &, QPainter *painter); 00058 virtual void drawExpression(QPainter*, Expression &); 00059 inline virtual unsigned int var_count(){return 2;} 00060 inline virtual double snapIntervalX(){return (isTracing()) ? tStep : getXScale();} 00061 inline virtual double startSnap(){return (isTracing()) ? tMin : 0;} 00062 inline virtual double traceDepX(double x){return (x-getXMin())/((getXMax()-getXMin())/(tMax-tMin))+tMin;} 00063 00064 virtual void sendCustomClick(QMouseEvent *, MathFunction *, double, double); 00065 00066 private: 00067 double tMin,tMax,tStep; 00068 00069 static const int X_VAR = 0; 00070 static const int Y_VAR = 1; 00071 00072 double t_trace; 00073 }; 00074 00075 #endif