1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2011, 2015 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #ifndef OUTPUT_CAIRO_CHART_H
18 #define OUTPUT_CAIRO_CHART_H 1
20 #include <cairo/cairo.h>
23 #include "libpspp/compiler.h"
45 /* The geometry of a chart. */
46 struct xrchart_geometry
48 /* Bottom of the abscissa segment */
51 /* Left of the ordinate segment */
62 /* Default font size for the plot. */
65 struct xrchart_colour fill_colour;
67 /* Stuff particular to cartesians and boxplots. */
68 struct xrchart_axis axis[2];
70 /* True iff a path is currently being drawn */
74 void xrchart_geometry_init (cairo_t *, struct xrchart_geometry *,
75 double width, double length);
76 void xrchart_geometry_free (cairo_t *, struct xrchart_geometry *);
78 #define XRCHART_N_COLOURS 27
79 extern const struct xrchart_colour data_colour[];
89 XRMARKER_CIRCLE, /* Hollow circle. */
90 XRMARKER_ASTERISK, /* Asterisk (*). */
91 XRMARKER_SQUARE /* Hollow square. */
94 void xrchart_draw_marker (cairo_t *, double x, double y, enum xrmarker_type,
97 void xrchart_label (cairo_t *, int horz_justify, int vert_justify,
98 double font_size, const char *);
100 void xrchart_label_rotate (cairo_t *cr, int horz_justify, int vert_justify,
101 double font_size, const char *string, double angle);
104 /* Draw a tick mark at position
105 If label is non zero, then print it at the tick mark
107 void draw_tick (cairo_t *, const struct xrchart_geometry *,
108 enum tick_orientation orientation,
111 const char *label, ...)
112 PRINTF_FORMAT (6, 7);
115 /* Write the title on a chart*/
116 void xrchart_write_title (cairo_t *, const struct xrchart_geometry *,
117 const char *title, ...)
118 PRINTF_FORMAT (3, 4);
120 /* Set the scale for the abscissa */
121 bool xrchart_write_xscale (cairo_t *, struct xrchart_geometry *,
122 double min, double max) WARN_UNUSED_RESULT;
124 /* Set the scale for the ordinate */
125 bool xrchart_write_yscale (cairo_t *, struct xrchart_geometry *,
126 double smin, double smax) WARN_UNUSED_RESULT;
128 void xrchart_write_xlabel (cairo_t *, const struct xrchart_geometry *,
131 /* Write the ordinate label */
132 void xrchart_write_ylabel (cairo_t *, const struct xrchart_geometry *,
135 void xrchart_write_legend (cairo_t *, const struct xrchart_geometry *);
143 void xrchart_vector_start (cairo_t *, struct xrchart_geometry *,
145 void xrchart_vector_end (cairo_t *, struct xrchart_geometry *);
146 void xrchart_vector (cairo_t *, struct xrchart_geometry *, double x, double y);
148 /* Plot a data point */
149 void xrchart_datum (cairo_t *, const struct xrchart_geometry *,
150 int dataset UNUSED, double x, double y);
152 /* Draw a line with slope SLOPE and intercept INTERCEPT.
153 between the points limit1 and limit2.
154 If lim_dim is XRCHART_DIM_Y then the limit{1,2} are on the
155 y axis otherwise the x axis
157 void xrchart_line (cairo_t *, const struct xrchart_geometry *,
158 double slope, double intercept,
159 double limit1, double limit2, enum xrchart_dim lim_dim);
161 /* Drawing various kinds of charts. */
162 void xrchart_draw_boxplot (const struct chart_item *, cairo_t *,
163 struct xrchart_geometry *);
164 void xrchart_draw_roc (const struct chart_item *, cairo_t *,
165 struct xrchart_geometry *);
166 void xrchart_draw_piechart (const struct chart_item *, cairo_t *,
167 struct xrchart_geometry *);
168 void xrchart_draw_barchart (const struct chart_item *, cairo_t *,
169 struct xrchart_geometry *);
170 void xrchart_draw_histogram (const struct chart_item *, cairo_t *,
171 struct xrchart_geometry *);
172 void xrchart_draw_np_plot (const struct chart_item *, cairo_t *,
173 struct xrchart_geometry *);
174 void xrchart_draw_scree (const struct chart_item *, cairo_t *,
175 struct xrchart_geometry *);
176 void xrchart_draw_spreadlevel (const struct chart_item *, cairo_t *,
177 struct xrchart_geometry *);
178 void xrchart_draw_scatterplot (const struct chart_item *, cairo_t *,
179 struct xrchart_geometry *);
181 void xr_draw_chart (const struct chart_item *, cairo_t *,
182 double width, double height);
184 char *xr_draw_png_chart (const struct chart_item *,
185 const char *file_name_template, int number,
186 const struct cell_color *fg,
187 const struct cell_color *bg);
189 char *xr_draw_eps_chart (const struct chart_item *item,
190 const char *file_name_template, int number,
191 const struct cell_color *fg,
192 const struct cell_color *bg);
194 #endif /* output/cairo-chart.h */