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_join(cr, CAIRO_LINE_JOIN_ROUND);
162 cairo_set_line_width(cr, 1);
164 for (i = 0; i < s->values_max_length; i++) {
168 t = s->measures[i].time.tv_sec;
169 v = s->measures[i].value.d_num;
171 if (v == UNKNOWN_DBL_VALUE || !t || (t - bt) < 0)
174 x = (t - bt) * g_width / (et - bt) + g_xoff;
176 y = compute_y(v, min, max, g_height, g_yoff);
179 cairo_move_to(cr, x, y);
182 cairo_line_to(cr, x, y);
191 graph_update(struct psensor **sensors,
193 struct config *config)
195 struct color *fgcolor = config->graph_fgcolor;
196 int et, bt, width, height, g_width, g_height;
197 double min_rpm, max_rpm, mint, maxt;
198 char *strmin, *strmax;
199 /* horizontal and vertical offset of the graph */
201 cairo_surface_t *cst;
202 cairo_t *cr, *cr_pixmap;
203 char *str_btime, *str_etime;
204 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
205 struct psensor **sensor_cur;
206 GtkAllocation galloc;
208 if (!gtk_widget_is_drawable(w_graph))
211 min_rpm = get_min_rpm(sensors);
212 max_rpm = get_max_rpm(sensors);
214 mint = get_min_temp(sensors);
215 strmin = psensor_value_to_string(SENSOR_TYPE_TEMP, mint);
217 maxt = get_max_temp(sensors);
218 strmax = psensor_value_to_string(SENSOR_TYPE_TEMP, maxt);
220 str_btime = time_to_str(get_graph_begin_time_s(config));
221 str_etime = time_to_str(get_graph_end_time_s());
223 gtk_widget_get_allocation(w_graph, &galloc);
224 width = galloc.width;
225 height = galloc.height;
227 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
228 cr = cairo_create(cst);
230 draw_graph_background(cr, width, height, config);
232 cairo_select_font_face(cr,
234 CAIRO_FONT_SLANT_NORMAL,
235 CAIRO_FONT_WEIGHT_NORMAL);
236 cairo_set_font_size(cr, 10.0);
238 cairo_text_extents(cr, str_etime, &te_etime);
239 cairo_text_extents(cr, str_btime, &te_btime);
240 cairo_text_extents(cr, strmax, &te_max);
241 cairo_text_extents(cr, strmin, &te_min);
243 g_yoff = GRAPH_V_PADDING;
245 g_height = height - GRAPH_V_PADDING;
246 if (te_etime.height > te_btime.height)
247 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
249 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
251 if (te_min.width > te_max.width)
252 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
254 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
256 g_width = width - g_xoff - GRAPH_H_PADDING;
258 cairo_set_source_rgb(cr,
259 fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
261 /* draw graph begin time */
262 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
263 cairo_show_text(cr, str_btime);
266 /* draw graph end time */
268 width - te_etime.width - GRAPH_H_PADDING,
269 height - GRAPH_V_PADDING);
270 cairo_show_text(cr, str_etime);
273 /* draw min and max temp */
274 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
275 cairo_show_text(cr, strmax);
279 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
280 cairo_show_text(cr, strmin);
283 draw_background_lines(cr, fgcolor,
288 /* .. and finaly draws the temperature graphs */
289 bt = get_graph_begin_time_s(config);
290 et = get_graph_end_time_s();
293 sensor_cur = sensors;
294 while (*sensor_cur) {
295 struct psensor *s = *sensor_cur;
300 if (is_fan_type(s->type)) {
303 } else if (s->type & SENSOR_TYPE_CPU_USAGE) {
307 SENSOR_TYPE_CPU_USAGE);
313 draw_sensor_curve(s, cr,
324 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
328 if (config->alpha_channel_enabled)
329 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
331 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
332 cairo_paint(cr_pixmap);
335 cairo_destroy(cr_pixmap);
336 cairo_surface_destroy(cst);