2 * Copyright (C) 2010-2012 jeanfi@gmail.com
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * 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
26 /* horizontal padding */
27 #define GRAPH_H_PADDING 4
28 /* vertical padding */
29 #define GRAPH_V_PADDING 4
31 static time_t get_graph_end_time_s()
35 if (gettimeofday(&tv, NULL) == 0)
41 static time_t get_graph_begin_time_s(struct config *cfg)
45 ct = get_graph_end_time_s();
50 return ct - cfg->graph_monitoring_duration * 60;
53 static int compute_y(double value, double min, double max, int height, int off)
55 double t = value - min;
56 return height - ((double)height * (t / (max - min))) + off;
59 static char *time_to_str(time_t s)
62 /* note: localtime returns a static field, no free required */
63 struct tm *tm = localtime(&s);
69 strftime(str, 6, "%H:%M", tm);
75 draw_graph_background(cairo_t *cr,
76 int g_xoff, int g_yoff,
77 int g_width, int g_height,
78 int width, int height, struct config *config,
81 GtkStyleContext* style_ctx;
82 struct color *bgcolor;
85 bgcolor = config->graph_bgcolor;
87 style_ctx = gtk_widget_get_style_context(widget);
88 gtk_style_context_get_background_color(style_ctx,
89 GTK_STATE_FLAG_NORMAL,
91 if (config->alpha_channel_enabled)
92 cairo_set_source_rgba(cr,
96 config->graph_bg_alpha);
98 cairo_set_source_rgb(cr,
103 cairo_rectangle(cr, 0, 0, width, height);
105 if (config->alpha_channel_enabled)
106 cairo_set_source_rgba(cr,
109 bgcolor->f_blue, config->graph_bg_alpha);
111 cairo_set_source_rgb(cr,
113 bgcolor->f_green, bgcolor->f_blue);
117 cairo_rectangle(cr, g_xoff, g_yoff, g_width, g_height);
121 /* setup dash style */
122 static double dashes[] = {
126 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
128 static void draw_background_lines(cairo_t *cr,
130 int g_width, int g_height,
131 int g_xoff, int g_yoff,
136 /* draw background lines */
137 cairo_set_line_width(cr, 1);
138 cairo_set_dash(cr, dashes, ndash, 0);
139 cairo_set_source_rgb(cr,
140 color->f_red, color->f_green, color->f_blue);
142 /* vertical lines representing time steps */
143 for (i = 0; i <= 5; i++) {
144 int x = i * (g_width / 5) + g_xoff;
145 cairo_move_to(cr, x, g_yoff);
146 cairo_line_to(cr, x, g_yoff + g_height);
150 /* horizontal lines draws a line for each 10C step */
151 for (i = min; i < max; i++) {
153 int y = compute_y(i, min, max, g_height, g_yoff);
155 cairo_move_to(cr, g_xoff, y);
156 cairo_line_to(cr, g_xoff + g_width, y);
161 /* back to normal line style */
162 cairo_set_dash(cr, 0, 0, 0);
165 static void draw_sensor_curve(struct psensor *s,
176 int first, i, x, y, t, dt, vdt;
179 cairo_set_source_rgb(cr,
186 for (i = 0; i < s->values_max_length; i++) {
187 t = s->measures[i].time.tv_sec;
188 v = s->measures[i].value.d_num;
190 if (v == UNKNOWN_DBL_VALUE || !t)
197 x = vdt * g_width / dt + g_xoff;
199 y = compute_y(v, min, max, g_height, g_yoff);
202 cairo_move_to(cr, x, y);
205 cairo_line_to(cr, x, y);
214 graph_update(struct psensor **sensors,
216 struct config *config)
218 struct color *fgcolor = config->graph_fgcolor;
219 int et, bt, width, height, g_width, g_height;
220 double min_rpm, max_rpm, mint, maxt;
221 char *strmin, *strmax;
222 /* horizontal and vertical offset of the graph */
224 cairo_surface_t *cst;
225 cairo_t *cr, *cr_pixmap;
226 char *str_btime, *str_etime;
227 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
228 struct psensor **sensor_cur;
229 GtkAllocation galloc;
231 if (!gtk_widget_is_drawable(w_graph))
234 min_rpm = get_min_rpm(sensors);
235 max_rpm = get_max_rpm(sensors);
237 mint = get_min_temp(sensors);
238 strmin = psensor_value_to_string(SENSOR_TYPE_TEMP, mint);
240 maxt = get_max_temp(sensors);
241 strmax = psensor_value_to_string(SENSOR_TYPE_TEMP, maxt);
243 str_btime = time_to_str(get_graph_begin_time_s(config));
244 str_etime = time_to_str(get_graph_end_time_s());
246 gtk_widget_get_allocation(w_graph, &galloc);
247 width = galloc.width;
248 height = galloc.height;
250 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
251 cr = cairo_create(cst);
253 cairo_select_font_face(cr,
255 CAIRO_FONT_SLANT_NORMAL,
256 CAIRO_FONT_WEIGHT_NORMAL);
257 cairo_set_font_size(cr, 10.0);
259 cairo_text_extents(cr, str_etime, &te_etime);
260 cairo_text_extents(cr, str_btime, &te_btime);
261 cairo_text_extents(cr, strmax, &te_max);
262 cairo_text_extents(cr, strmin, &te_min);
264 g_yoff = GRAPH_V_PADDING;
266 g_height = height - GRAPH_V_PADDING;
267 if (te_etime.height > te_btime.height)
268 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
270 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
272 if (te_min.width > te_max.width)
273 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
275 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
277 g_width = width - g_xoff - GRAPH_H_PADDING;
279 draw_graph_background(cr,
280 g_xoff, g_yoff, g_width, g_height,
281 width, height, config,
284 cairo_set_source_rgb(cr,
285 fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
287 /* draw graph begin time */
288 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
289 cairo_show_text(cr, str_btime);
292 /* draw graph end time */
294 width - te_etime.width - GRAPH_H_PADDING,
295 height - GRAPH_V_PADDING);
296 cairo_show_text(cr, str_etime);
299 /* draw min and max temp */
300 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
301 cairo_show_text(cr, strmax);
305 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
306 cairo_show_text(cr, strmin);
309 draw_background_lines(cr, fgcolor,
314 /* .. and finaly draws the temperature graphs */
315 bt = get_graph_begin_time_s(config);
316 et = get_graph_end_time_s();
319 sensor_cur = sensors;
321 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
322 cairo_set_line_width(cr, 1);
323 while (*sensor_cur) {
324 struct psensor *s = *sensor_cur;
329 if (is_fan_type(s->type)) {
332 } else if (s->type & SENSOR_TYPE_CPU_USAGE) {
336 SENSOR_TYPE_CPU_USAGE);
342 draw_sensor_curve(s, cr,
353 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
357 if (config->alpha_channel_enabled)
358 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
360 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
361 cairo_paint(cr_pixmap);
364 cairo_destroy(cr_pixmap);
365 cairo_surface_destroy(cst);