2 Copyright (C) 2010-2011 jeanfi@gmail.com
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 2 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, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
27 /* horizontal padding */
28 #define GRAPH_H_PADDING 4
29 /* vertical padding */
30 #define GRAPH_V_PADDING 4
32 static time_t get_graph_end_time_s()
36 if (gettimeofday(&tv, NULL) == 0)
42 static time_t get_graph_begin_time_s(struct config *cfg)
46 ct = get_graph_end_time_s();
51 return ct - cfg->graph_monitoring_duration * 60;
54 static int compute_y(double value, double min, double max, int height, int off)
56 double t = value - min;
57 return height - ((double)height * (t / (max - min))) + off;
60 static char *time_to_str(time_t s)
63 /* note: localtime returns a static field, no free required */
64 struct tm *tm = localtime(&s);
70 strftime(str, 6, "%H:%M", tm);
76 draw_graph_background(cairo_t *cr,
77 int width, int height, struct config *config)
79 struct color *bgcolor = config->graph_bgcolor;
82 if (config->alpha_channel_enabled)
83 cairo_set_source_rgba(cr,
86 bgcolor->f_blue, config->graph_bg_alpha);
88 cairo_set_source_rgb(cr,
90 bgcolor->f_green, bgcolor->f_blue);
92 cairo_rectangle(cr, 0, 0, width, height);
96 /* setup dash style */
97 static double dashes[] = {
103 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
105 static void draw_background_lines(cairo_t *cr,
107 int g_width, int g_height,
108 int g_xoff, int g_yoff,
113 /* draw background lines */
114 cairo_set_dash(cr, dashes, ndash, 0);
115 cairo_set_line_width(cr, 1);
116 cairo_set_source_rgb(cr,
117 color->f_red, color->f_green, color->f_blue);
119 /* vertical lines representing time steps */
120 for (i = 0; i <= 5; i++) {
121 int x = i * (g_width / 5) + g_xoff;
122 cairo_move_to(cr, x, g_yoff);
123 cairo_line_to(cr, x, g_yoff + g_height);
127 /* horizontal lines draws a line for each 10C step */
128 for (i = min; i < max; i++) {
130 int y = compute_y(i, min, max, g_height, g_yoff);
132 cairo_move_to(cr, g_xoff, y);
133 cairo_line_to(cr, g_xoff + g_width, y);
138 /* back to normal line style */
139 cairo_set_dash(cr, 0, 0, 0);
143 static void draw_sensor_curve(struct psensor *s,
157 cairo_set_source_rgb(cr,
161 cairo_set_line_width(cr, 1);
163 for (i = 0; i < s->values_max_length; i++) {
167 t = s->measures[i].time.tv_sec;
168 v = s->measures[i].value;
170 if (v == UNKNOWN_VALUE || !t || (t - bt) < 0)
173 x = (t - bt) * g_width / (et - bt) + g_xoff;
175 y = compute_y(v, min, max, g_height, g_yoff);
178 cairo_move_to(cr, x, y);
181 cairo_line_to(cr, x, y);
190 graph_update(struct psensor **sensors,
191 GtkWidget *w_graph, struct config *config)
193 struct color *fgcolor = config->graph_fgcolor;
195 double min_rpm = get_min_rpm(sensors);
196 double max_rpm = get_max_rpm(sensors);
198 double mint = get_min_temp(sensors);
199 char *strmin = psensor_value_to_string(SENSOR_TYPE_TEMP, mint);
201 double maxt = get_max_temp(sensors);
202 char *strmax = psensor_value_to_string(SENSOR_TYPE_TEMP, maxt);
204 int width, height, g_width, g_height;
206 /* horizontal and vertical offset of the graph */
209 cairo_surface_t *cst;
210 cairo_t *cr, *cr_pixmap;
212 char *str_btime = time_to_str(get_graph_begin_time_s(config));
213 char *str_etime = time_to_str(get_graph_end_time_s());
215 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
217 struct psensor **sensor_cur;
218 GtkAllocation galloc;
220 gtk_widget_get_allocation(w_graph, &galloc);
221 width = galloc.width;
222 height = galloc.height;
224 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
225 cr = cairo_create(cst);
227 draw_graph_background(cr, width, height, config);
229 cairo_select_font_face(cr,
231 CAIRO_FONT_SLANT_NORMAL,
232 CAIRO_FONT_WEIGHT_NORMAL);
233 cairo_set_font_size(cr, 10.0);
235 cairo_text_extents(cr, str_etime, &te_etime);
236 cairo_text_extents(cr, str_btime, &te_btime);
237 cairo_text_extents(cr, strmax, &te_max);
238 cairo_text_extents(cr, strmin, &te_min);
240 g_yoff = GRAPH_V_PADDING;
242 g_height = height - GRAPH_V_PADDING;
243 if (te_etime.height > te_btime.height)
244 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
246 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
248 if (te_min.width > te_max.width)
249 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
251 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
253 g_width = width - g_xoff - GRAPH_H_PADDING;
255 cairo_set_source_rgb(cr,
256 fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
258 /* draw graph begin time */
259 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
260 cairo_show_text(cr, str_btime);
263 /* draw graph end time */
265 width - te_etime.width - GRAPH_H_PADDING,
266 height - GRAPH_V_PADDING);
267 cairo_show_text(cr, str_etime);
270 /* draw min and max temp */
271 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
272 cairo_show_text(cr, strmax);
276 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
277 cairo_show_text(cr, strmin);
280 draw_background_lines(cr, fgcolor,
285 /* .. and finaly draws the temperature graphs */
286 bt = get_graph_begin_time_s(config);
287 et = get_graph_end_time_s();
290 sensor_cur = sensors;
291 while (*sensor_cur) {
292 struct psensor *s = *sensor_cur;
297 if (is_fan_type(s->type)) {
305 draw_sensor_curve(s, cr,
316 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
320 if (config->alpha_channel_enabled)
321 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
323 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
324 cairo_paint(cr_pixmap);
327 cairo_destroy(cr_pixmap);
328 cairo_surface_destroy(cst);