1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2004, 2009 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/>. */
22 #include <cairo/cairo.h>
23 #include <libpspp/compiler.h>
24 #include <output/chart.h>
32 struct chart_geometry;
34 void chart_vector_start (cairo_t *, struct chart_geometry *,
36 void chart_vector_end (cairo_t *, struct chart_geometry *);
37 void chart_vector (cairo_t *, struct chart_geometry *, double x, double y);
39 /* Plot a data point */
40 void chart_datum(cairo_t *, const struct chart_geometry *,
41 int dataset UNUSED, double x, double y);
43 /* Draw a line with slope SLOPE and intercept INTERCEPT.
44 between the points limit1 and limit2.
45 If lim_dim is CHART_DIM_Y then the limit{1,2} are on the
46 y axis otherwise the x axis
48 void chart_line(cairo_t *, const struct chart_geometry *,
49 double slope, double intercept,
50 double limit1, double limit2, enum CHART_DIM lim_dim);