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,
82 GtkStyleContext *style_ctx;
83 struct color *bgcolor;
86 bgcolor = config->graph_bgcolor;
88 style_ctx = gtk_widget_get_style_context(window);
89 gtk_style_context_get_background_color(style_ctx,
90 GTK_STATE_FLAG_NORMAL,
93 if (config->alpha_channel_enabled)
94 cairo_set_source_rgba(cr,
98 config->graph_bg_alpha);
100 cairo_set_source_rgb(cr,
105 cairo_rectangle(cr, 0, 0, width, height);
107 if (config->alpha_channel_enabled)
108 cairo_set_source_rgba(cr,
112 config->graph_bg_alpha);
114 cairo_set_source_rgb(cr,
119 cairo_rectangle(cr, g_xoff, g_yoff, g_width, g_height);
123 /* setup dash style */
124 static double dashes[] = {
128 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
130 static void draw_background_lines(cairo_t *cr,
132 int g_width, int g_height,
133 int g_xoff, int g_yoff,
138 /* draw background lines */
139 cairo_set_line_width(cr, 1);
140 cairo_set_dash(cr, dashes, ndash, 0);
141 cairo_set_source_rgb(cr,
142 color->f_red, color->f_green, color->f_blue);
144 /* vertical lines representing time steps */
145 for (i = 0; i <= 5; i++) {
146 int x = i * (g_width / 5) + g_xoff;
147 cairo_move_to(cr, x, g_yoff);
148 cairo_line_to(cr, x, g_yoff + g_height);
152 /* horizontal lines draws a line for each 10C step */
153 for (i = min; i < max; i++) {
155 int y = compute_y(i, min, max, g_height, g_yoff);
157 cairo_move_to(cr, g_xoff, y);
158 cairo_line_to(cr, g_xoff + g_width, y);
163 /* back to normal line style */
164 cairo_set_dash(cr, 0, 0, 0);
167 static void draw_sensor_curve(struct psensor *s,
178 int first, i, x, y, t, dt, vdt;
181 cairo_set_source_rgb(cr,
188 for (i = 0; i < s->values_max_length; i++) {
189 t = s->measures[i].time.tv_sec;
190 v = s->measures[i].value;
192 if (v == UNKNOWN_DBL_VALUE || !t)
199 x = vdt * g_width / dt + g_xoff;
201 y = compute_y(v, min, max, g_height, g_yoff);
204 cairo_move_to(cr, x, y);
207 cairo_line_to(cr, x, y);
216 graph_update(struct psensor **sensors,
218 struct config *config,
221 struct color *fgcolor = config->graph_fgcolor;
222 int et, bt, width, height, g_width, g_height;
223 double min_rpm, max_rpm, mint, maxt;
224 char *strmin, *strmax;
225 /* horizontal and vertical offset of the graph */
227 cairo_surface_t *cst;
228 cairo_t *cr, *cr_pixmap;
229 char *str_btime, *str_etime;
230 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
231 struct psensor **sensor_cur;
232 GtkAllocation galloc;
233 GtkStyleContext *style_ctx;
236 if (!gtk_widget_is_drawable(w_graph))
239 min_rpm = get_min_rpm(sensors);
240 max_rpm = get_max_rpm(sensors);
242 mint = get_min_temp(sensors);
244 strmin = psensor_value_to_str(SENSOR_TYPE_TEMP,
246 config->temperature_unit == CELCIUS);
248 maxt = get_max_temp(sensors);
249 strmax = psensor_value_to_str(SENSOR_TYPE_TEMP,
251 config->temperature_unit == CELCIUS);
253 str_btime = time_to_str(get_graph_begin_time_s(config));
254 str_etime = time_to_str(get_graph_end_time_s());
256 gtk_widget_get_allocation(w_graph, &galloc);
257 width = galloc.width;
258 height = galloc.height;
260 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
261 cr = cairo_create(cst);
263 cairo_select_font_face(cr,
265 CAIRO_FONT_SLANT_NORMAL,
266 CAIRO_FONT_WEIGHT_NORMAL);
267 cairo_set_font_size(cr, 10.0);
269 cairo_text_extents(cr, str_etime, &te_etime);
270 cairo_text_extents(cr, str_btime, &te_btime);
271 cairo_text_extents(cr, strmax, &te_max);
272 cairo_text_extents(cr, strmin, &te_min);
274 g_yoff = GRAPH_V_PADDING;
276 g_height = height - GRAPH_V_PADDING;
277 if (te_etime.height > te_btime.height)
278 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
280 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
282 if (te_min.width > te_max.width)
283 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
285 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
287 g_width = width - g_xoff - GRAPH_H_PADDING;
289 draw_graph_background(cr,
290 g_xoff, g_yoff, g_width, g_height,
291 width, height, config,
295 /** Set the color for text drawing */
296 style_ctx = gtk_widget_get_style_context(window);
297 gtk_style_context_get_color(style_ctx, GTK_STATE_FLAG_NORMAL, &rgba);
298 cairo_set_source_rgb(cr, rgba.red, rgba.green, rgba.blue);
300 /* draw graph begin time */
301 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
302 cairo_show_text(cr, str_btime);
305 /* draw graph end time */
307 width - te_etime.width - GRAPH_H_PADDING,
308 height - GRAPH_V_PADDING);
309 cairo_show_text(cr, str_etime);
312 /* draw min and max temp */
313 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
314 cairo_show_text(cr, strmax);
318 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
319 cairo_show_text(cr, strmin);
322 draw_background_lines(cr, fgcolor,
327 /* .. and finaly draws the temperature graphs */
328 bt = get_graph_begin_time_s(config);
329 et = get_graph_end_time_s();
332 sensor_cur = sensors;
334 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
335 cairo_set_line_width(cr, 1);
336 while (*sensor_cur) {
337 struct psensor *s = *sensor_cur;
342 if (is_fan_type(s->type)) {
345 } else if (s->type & SENSOR_TYPE_CPU_USAGE) {
349 SENSOR_TYPE_CPU_USAGE);
355 draw_sensor_curve(s, cr,
366 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
370 if (config->alpha_channel_enabled)
371 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
373 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
374 cairo_paint(cr_pixmap);
377 cairo_destroy(cr_pixmap);
378 cairo_surface_destroy(cst);