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Diffstat (limited to 'kmplot/kmplot/diagr.h')
| -rw-r--r-- | kmplot/kmplot/diagr.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/kmplot/kmplot/diagr.h b/kmplot/kmplot/diagr.h new file mode 100644 index 00000000..45cae5a6 --- /dev/null +++ b/kmplot/kmplot/diagr.h @@ -0,0 +1,145 @@ +/* +* KmPlot - a math. function plotter for the KDE-Desktop +* +* Copyright (C) 1998, 1999 Klaus-Dieter M�ler +* 2000, 2002 kd.moeller@t-online.de +* +* This file is part of the KDE Project. +* KmPlot is part of the KDE-EDU Project. +* +* 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 +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +* +*/ +/** @file diagr.h + * @brief Contains the CDiagr class. */ + +#ifndef diagr_included +#define diagr_included + +// standard includes +#include <math.h> +#include <stdio.h> + +// Qt includes +#include <qpainter.h> + +//@{ +/// Some abbreviations for horizontal and vertical lines. +#define Line drawLine +#define Lineh(x1, y, x2) drawLine(x1, y, x2, y) +#define Linev(x, y1, y2) drawLine(x, y1, x, y2) +//@} + +//@{ +/// Grid styles. +#define GRID_NONE 0 +#define GRID_LINES 1 +#define GRID_CROSSES 2 +#define GRID_POLAR 3 +//@} + +/** @short This class manages the core drawing of the axes and the grid. */ +class CDiagr +{ +public: + /// Contructor. Members are set to initial values. + ///@see Create() + CDiagr(); + /// Nothing to do for the destructor. + ~CDiagr(); + + /// Sets all members to current values. + void Create( QPoint Ref, + int lx, int ly, + double xmin, double xmax, + double ymin, double ymax ); + /// Sets the current values for the scaling factors + void Skal( double ex, double ey ); + /// Draws all requested parts of the diagram (axes, labels, grid e.g.) + void Plot( QPainter* pDC ); + /// Returns the rectangle around the core of the plot area. + QRect GetPlotArea() { return PlotArea; } + /// Returns the rectangle for the frame around the plot. Extra frame is bigger. + QRect GetFrame() { return m_frame; } + + /** @name Transformations */ + //@{ + /// These functions convert real coordinates to pixel coordinates and vice versa. + int Transx(double); + int Transy(double); + double Transx(int); + double Transy(int); + //@} + + /** @name Style options + * These members hold the current options for line widths and colors + */ + //@{ + QRgb frameColor; ///< color of the border frame + QRgb axesColor; ///< color of the axes + QRgb gridColor; ///< color of the grid + + uint borderThickness, ///< current line width for the border frame + axesLineWidth, ///< current line width for the axes + gridLineWidth, ///< current line width for the grid + ticWidth, ///< current line width for the tics + ticLength, ///< current length of the tic lines + //@} + xclipflg, ///< clipflg is set to 1 if the plot is out of the plot aerea. + yclipflg; ///< clipflg is set to 1 if the plot is out of the plot aerea. + + +private: + + /// Draw the coordinate axes. + void drawAxes(QPainter*); + /// Draw the grid. + void drawGrid( QPainter* ); + /// Write labels. + void drawLabels(QPainter*); + /// Current grid style. + int g_mode; + + //@{ + /// Plot range edge. + double xmin, xmax, ymin, ymax; + //@} + //@{ + /// Clip boundage. + double xmd, ymd; + //@} + //@{ + /// Axes tic distance. + double ex, ey; + //@} + //@{ + ///Position of the first tic. + double tsx, tsy; + //@} + //@{ + /// Screen coordinates of the coordinate system origin. + double ox, oy; + //@} + //@{ + /// Transformation factors. + /// @see Skal + double skx, sky; + //@} + + QRect PlotArea; ///< plot area + QRect m_frame; ///< frame around the plot +}; + +#endif // diagr_included |