1 /* PSPP - computes sample statistics.
2 Copyright (C) 2004 Free Software Foundation, Inc.
3 Written by John Darrington <john@darrington.wattle.id.au>
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
32 const char *data_colour[] = {
47 chart_initialise(struct chart *chart)
50 chart->pl_params = pl_newplparams();
52 chart->lp = pl_newpl_r ("X",0,stdout,stderr,chart->pl_params);
54 if (pl_openpl_r (chart->lp) < 0) /* open Plotter */
57 pl_fspace_r (chart->lp, 0.0, 0.0, 1000.0, 1000.0); /* set coordinate system */
58 pl_flinewidth_r (chart->lp, 0.25); /* set line thickness */
59 pl_pencolorname_r (chart->lp, "black");
61 pl_erase_r (chart->lp); /* erase graphics display */
62 pl_filltype_r(chart->lp,0);
66 pl_savestate_r(chart->lp);
68 /* Set default chartetry */
69 chart->data_top = 900;
70 chart->data_right = 800;
71 chart->data_bottom = 120;
72 chart->data_left = 150;
73 chart->abscissa_top = 70;
74 chart->ordinate_right = 120;
75 chart->title_bottom = 920;
76 chart->legend_left = 810;
77 chart->legend_right = 1000;
79 strcpy(chart->fill_colour,"red");
82 /* Get default font size */
83 if ( !chart->font_size)
84 chart->font_size = pl_fontsize_r(chart->lp, -1);
86 /* Draw the data area */
88 chart->data_left, chart->data_bottom,
89 chart->data_right, chart->data_top);
97 /* Draw a tick mark at position
98 If label is non zero, then print it at the tick mark
101 draw_tick(struct chart *chart,
102 enum tick_orientation orientation,
104 const char *label, ...)
106 const int tickSize = 10;
108 pl_savestate_r(chart->lp);
110 pl_move_r(chart->lp, chart->data_left, chart->data_bottom);
112 if ( orientation == TICK_ABSCISSA )
113 pl_flinerel_r(chart->lp, position, 0, position, -tickSize);
114 else if (orientation == TICK_ORDINATE )
115 pl_flinerel_r(chart->lp, 0, position, -tickSize, position);
123 vsnprintf(buf,10,label,ap);
125 if ( orientation == TICK_ABSCISSA )
126 pl_alabel_r(chart->lp, 'c','t', buf);
127 else if (orientation == TICK_ORDINATE )
129 if ( fabs(position) < DBL_EPSILON )
130 pl_moverel_r(chart->lp, 0, 10);
132 pl_alabel_r(chart->lp, 'r','c', buf);
138 pl_restorestate_r(chart->lp);
145 chart_write_title(struct chart *chart, const char *title)
147 /* Write the title */
148 pl_savestate_r(chart->lp);
149 pl_ffontsize_r(chart->lp,chart->font_size * 1.5);
150 pl_move_r(chart->lp,chart->data_left, chart->title_bottom);
151 pl_alabel_r(chart->lp,0,0,title);
152 pl_restorestate_r(chart->lp);
158 chart_finalise(struct chart *chart)
160 pl_restorestate_r(chart->lp);
162 if (pl_closepl_r (chart->lp) < 0) /* close Plotter */
164 fprintf (stderr, "Couldn't close Plotter\n");
168 pl_deletepl_r(chart->lp);
170 pl_deleteplparams(chart->pl_params);