File indexing completed on 2023-09-24 03:53:07

 /*
     KmPlot - a math. function plotter for the KDE-Desktop
 
     SPDX-FileCopyrightText: 1998, 1999, 2000, 2002 Klaus-Dieter Möller <kd.moeller@t-online.de>
 
     This file is part of the KDE Project.
     KmPlot is part of the KDE-EDU Project.
 
     SPDX-License-Identifier: GPL-2.0-or-later
 
 */
 
 #ifndef xparser_included
 #define xparser_included
 
 #define SLIDER_COUNT 4
 
 // Qt includes
 #include <QDebug>
 
 // local includes
 #include "parser.h"
 #include "settings.h"
 #include "vector.h"
 
 /**
  * @short Extended parser class.
  *
  * This class extends the parser class to support derivatives,
  * draw options like color and line width and so on.
  */
 class XParser : public Parser
 {
 public:
     static XParser *self();
 
     ~XParser();
     /**
      * Evaluates the \p n th derivative of the equation using numerical
      * stepsize \p h.
      */
     double derivative(int n, Equation *eq, DifferentialState *state, double x, double h);
     /**
      * For use with functions of two variables.
      */
     double partialDerivative(int n1, int n2, Equation *eq, DifferentialState *state, double x, double y, double h1, double h2);
     /**
      * For differential equations - uses numerical integration to
      * calculate value for the given x. Differential equations often have
      * the annoying habit of diverging to infinity rapidly. If this
      * happens while trying to calculate the value, then
      * XParser::differentialFinite will be set to false, and
      * XParserdifferentialDiverge will be set to the last point where the
      * differential value was finite.
      */
     double differential(Equation *eq, DifferentialState *state, double x, double max_dx);
     bool differentialFinite;
     double differentialDiverge;
     /**
      * The settings contain 10 default function colors. This returns the
      * (function % 10)th color.
      */
     QColor defaultColor(int function);
 
     /// finds a free function name
     QString findFunctionName(const QString &preferredName, int id, const QStringList &neededPatterns = QStringList(QStringLiteral("%1")));
 
     /// Returns an unused function name if it is needed
     void fixFunctionName(QString &, Equation::Type const = Equation::Cartesian, int const = -1);
 
     /// Interpretates the extended function string (only used by the old file format)
     bool getext(Function *, const QString &);
 
     /// Functions for the D-BUS interface:
 public Q_SLOTS:
     /// Returns a list with all functions
     Q_SCRIPTABLE QStringList listFunctionNames();
 
     /// Returns true if the graph is visible, otherwise false.
     Q_SCRIPTABLE bool functionFVisible(uint id);
     Q_SCRIPTABLE bool functionF1Visible(uint id);
     Q_SCRIPTABLE bool functionF2Visible(uint id);
     Q_SCRIPTABLE bool functionIntVisible(uint id);
     /// Set the visible of the function. Returns true if it succeeds, otherwise false.
     Q_SCRIPTABLE bool setFunctionFVisible(uint id, bool visible);
     Q_SCRIPTABLE bool setFunctionF1Visible(uint id, bool visible);
     Q_SCRIPTABLE bool setFunctionF2Visible(uint id, bool visible);
     Q_SCRIPTABLE bool setFunctionIntVisible(uint id, bool visible);
 
     /// Returns the function expression, or an empty string if the function couldn't be found
     Q_SCRIPTABLE QString functionStr(uint id, uint eq);
     /// Returns the complete function string including the extensions of a function, or an empty string if the function couldn't be found
 
     /// Get the color of a graph
     Q_SCRIPTABLE QColor functionFColor(uint id);
     Q_SCRIPTABLE QColor functionF1Color(uint id);
     Q_SCRIPTABLE QColor functionF2Color(uint id);
     Q_SCRIPTABLE QColor functionIntColor(uint id);
     /// Set the color of a graph. Returns true if it succeeds, otherwise false.
     Q_SCRIPTABLE bool setFunctionFColor(uint id, const QColor &color);
     Q_SCRIPTABLE bool setFunctionF1Color(uint id, const QColor &color);
     Q_SCRIPTABLE bool setFunctionF2Color(uint id, const QColor &color);
     Q_SCRIPTABLE bool setFunctionIntColor(uint id, const QColor &color);
 
     /// Get the line width of a graph
     Q_SCRIPTABLE double functionFLineWidth(uint id);
     Q_SCRIPTABLE double functionF1LineWidth(uint id);
     Q_SCRIPTABLE double functionF2LineWidth(uint id);
     Q_SCRIPTABLE double functionIntLineWidth(uint id);
     /// Set the line width of a graph. Returns true if it succeeds, otherwise false.
     Q_SCRIPTABLE bool setFunctionFLineWidth(uint id, double linewidth);
     Q_SCRIPTABLE bool setFunctionF1LineWidth(uint id, double linewidth);
     Q_SCRIPTABLE bool setFunctionF2LineWidth(uint id, double linewidth);
     Q_SCRIPTABLE bool setFunctionIntLineWidth(uint id, double linewidth);
 
     /// Returns the function's parameter list
     Q_SCRIPTABLE QStringList functionParameterList(uint id);
     Q_SCRIPTABLE bool functionAddParameter(uint id, const QString &new_parameter);
     Q_SCRIPTABLE bool functionRemoveParameter(uint id, const QString &remove_parameter);
     Q_SCRIPTABLE int addFunction(const QString &f_str0, const QString &f_str1);
     Q_SCRIPTABLE bool addFunction(const QString &extstr0,
                                   const QString &extstr1,
                                   bool f_mode,
                                   bool f1_mode,
                                   bool f2_mode,
                                   bool integral_mode,
                                   double linewidth,
                                   double f1linewidth,
                                   double f2linewidth,
                                   double integrallinewidth,
                                   const QString &str_dmin,
                                   const QString &str_dmax,
                                   const QString &str_startx,
                                   const QString &str_starty,
                                   double integral_precision,
                                   const QColor &color,
                                   const QColor &f1_color,
                                   const QColor &f2_color,
                                   const QColor &integral_color,
                                   const QStringList &str_parameter,
                                   int use_slider);
     Q_SCRIPTABLE bool setFunctionExpression(uint id, uint eq, const QString &f_str);
 
     /// Get the min and max value of a graph
     Q_SCRIPTABLE QString functionMinValue(uint id);
     Q_SCRIPTABLE QString functionMaxValue(uint id);
     /// Set the min and max values of a graph. Returns true if it succeeds, otherwise false.
     Q_SCRIPTABLE bool setFunctionMinValue(uint id, const QString &min);
     Q_SCRIPTABLE bool setFunctionMaxValue(uint id, const QString &max);
 
     /// Get the startx and starty value of a graph
     Q_SCRIPTABLE QString functionStartXValue(uint id);
     Q_SCRIPTABLE QString functionStartYValue(uint id);
     /// Set the startx and starty values of a graph. Returns true if it succeeds, otherwise false.
     Q_SCRIPTABLE bool setFunctionStartValue(uint id, const QString &x, const QString &y);
 
 private:
     Vector rk4_f(int order, Equation *eq, double x, const Vector &y);
     /// for use in differential
     Vector m_k1, m_k2, m_k3, m_k4, m_y_temp, m_y, m_result, m_arg;
 
 private:
     XParser();
     static XParser *m_self;
 };
 
 #endif // xparser_included