2 * Copyright (C) 2010-2014 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
24 #include <glib/gi18n.h>
33 /* horizontal padding */
34 #define GRAPH_H_PADDING 4
35 /* vertical padding */
36 #define GRAPH_V_PADDING 4
38 bool is_smooth_curves_enabled;
41 /* Horizontal position of the central region (curves) */
43 /* Vertical position of the central region (curves) */
46 /* Height of the drawing canvas */
49 /* Background color of the current desktop theme */
50 GdkRGBA theme_bg_color;
52 /* Foreground color of the current desktop theme */
53 GdkRGBA theme_fg_color;
57 /* Return the end time of the graph i.e. the more recent measure. If
58 * no measure are available, return 0.
60 static time_t get_graph_end_time_s(struct psensor **sensors)
64 struct measure *measures;
70 measures = s->measures;
72 for (i = s->values_max_length - 1; i >= 0; i--) {
73 if (measures[i].value != UNKNOWN_DBL_VALUE) {
74 t = measures[i].time.tv_sec;
88 static time_t get_graph_begin_time_s(struct config *cfg, time_t etime)
93 return etime - cfg->graph_monitoring_duration * 60;
97 compute_y(double value, double min, double max, int height, int off)
99 double t = value - min;
101 return height - ((double)height * (t / (max - min))) + off;
104 static char *time_to_str(time_t s)
107 /* note: localtime returns a static field, no free required */
108 struct tm *tm = localtime(&s);
114 strftime(str, 6, "%H:%M", tm);
119 static void draw_left_region(cairo_t *cr, struct graph_info *info)
121 cairo_set_source_rgb(cr,
122 info->theme_bg_color.red,
123 info->theme_bg_color.green,
124 info->theme_bg_color.blue);
126 cairo_rectangle(cr, 0, 0, info->g_xoff, info->height);
131 draw_graph_background(cairo_t *cr,
132 int g_xoff, int g_yoff,
133 int g_width, int g_height,
134 int width, int height, struct config *config,
137 GtkStyleContext *style_ctx;
138 struct color *bgcolor;
141 bgcolor = config->graph_bgcolor;
143 style_ctx = gtk_widget_get_style_context(window);
144 gtk_style_context_get_background_color(style_ctx,
145 GTK_STATE_FLAG_NORMAL,
148 if (config->alpha_channel_enabled)
149 cairo_set_source_rgba(cr,
153 config->graph_bg_alpha);
155 cairo_set_source_rgb(cr,
160 cairo_rectangle(cr, g_xoff, 0, g_width, height);
163 if (config->alpha_channel_enabled)
164 cairo_set_source_rgba(cr,
168 config->graph_bg_alpha);
170 cairo_set_source_rgb(cr,
175 cairo_rectangle(cr, g_xoff, g_yoff, g_width, g_height);
179 /* setup dash style */
180 static double dashes[] = {
184 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
186 static void draw_background_lines(cairo_t *cr,
188 int g_width, int g_height,
189 int g_xoff, int g_yoff,
194 /* draw background lines */
195 cairo_set_line_width(cr, 1);
196 cairo_set_dash(cr, dashes, ndash, 0);
197 cairo_set_source_rgb(cr,
198 color->red, color->green, color->blue);
200 /* vertical lines representing time steps */
201 for (i = 0; i <= 5; i++) {
202 int x = i * (g_width / 5) + g_xoff;
204 cairo_move_to(cr, x, g_yoff);
205 cairo_line_to(cr, x, g_yoff + g_height);
209 /* horizontal lines draws a line for each 10C step */
210 for (i = min; i < max; i++) {
212 int y = compute_y(i, min, max, g_height, g_yoff);
214 cairo_move_to(cr, g_xoff, y);
215 cairo_line_to(cr, g_xoff + g_width, y);
220 /* back to normal line style */
221 cairo_set_dash(cr, 0, 0, 0);
224 /* Keys: sensor identifier.
226 * Values: array of time_t. Each time_t is corresponding to a sensor
227 * measure which has been used as the start point of a Bezier curve.
229 static GHashTable *times;
231 static void draw_sensor_smooth_curve(struct psensor *s,
242 int i, dt, vdt, j, k, found;
243 double x[4], y[4], v;
244 time_t t, t0, *stimes;
247 times = g_hash_table_new_full(g_str_hash,
252 stimes = g_hash_table_lookup(times, s->id);
254 cairo_set_source_rgb(cr,
259 /* search the index of the first measure used as a start point
260 * of a Bezier curve. The start and end points of the Bezier
261 * curves must be preserved to ensure the same overall shape
265 while (i < s->values_max_length) {
266 t = s->measures[i].time.tv_sec;
267 v = s->measures[i].value;
270 if (v != UNKNOWN_DBL_VALUE && t) {
273 if (t == stimes[k]) {
288 stimes = malloc((s->values_max_length + 1) * sizeof(time_t));
289 memset(stimes, 0, (s->values_max_length + 1) * sizeof(time_t));
290 g_hash_table_insert(times, strdup(s->id), stimes);
292 if (i == s->values_max_length)
297 while (i < s->values_max_length) {
300 while (i < s->values_max_length && j < 4) {
301 t = s->measures[i].time.tv_sec;
302 v = s->measures[i].value;
304 if (v == UNKNOWN_DBL_VALUE || !t) {
311 x[0 + j] = ((double)vdt * g_width) / dt + g_xoff;
312 y[0 + j] = compute_y(v, min, max, g_height, g_yoff);
322 cairo_move_to(cr, x[0], y[0]);
323 cairo_curve_to(cr, x[1], y[1], x[2], y[3], x[3], y[3]);
332 static void draw_sensor_curve(struct psensor *s,
343 int first, i, t, dt, vdt;
346 cairo_set_source_rgb(cr,
353 for (i = 0; i < s->values_max_length; i++) {
354 t = s->measures[i].time.tv_sec;
355 v = s->measures[i].value;
357 if (v == UNKNOWN_DBL_VALUE || !t)
362 x = ((double)vdt * g_width) / dt + g_xoff;
364 y = compute_y(v, min, max, g_height, g_yoff);
367 cairo_move_to(cr, x, y);
370 cairo_line_to(cr, x, y);
377 static void display_no_graphs_warning(cairo_t *cr, int x, int y)
381 msg = strdup(_("No graphs enabled"));
383 cairo_select_font_face(cr,
385 CAIRO_FONT_SLANT_NORMAL,
386 CAIRO_FONT_WEIGHT_NORMAL);
387 cairo_set_font_size(cr, 18.0);
389 cairo_move_to(cr, x, y);
390 cairo_show_text(cr, msg);
396 graph_update(struct psensor **sensors,
398 struct config *config,
401 struct color *fgcolor = config->graph_fgcolor;
402 int et, bt, width, height, g_width, g_height;
403 double min_rpm, max_rpm, mint, maxt, min, max;
404 char *strmin, *strmax;
405 /* horizontal and vertical offset of the graph */
406 int g_xoff, g_yoff, no_graphs;
407 cairo_surface_t *cst;
408 cairo_t *cr, *cr_pixmap;
409 char *str_btime, *str_etime;
410 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
411 struct psensor **sensor_cur, **enabled_sensors;
412 GtkAllocation galloc;
413 GtkStyleContext *style_ctx;
414 struct graph_info info;
416 if (!gtk_widget_is_drawable(w_graph))
419 enabled_sensors = psensor_list_filter_graph_enabled(sensors);
421 min_rpm = get_min_rpm(enabled_sensors);
422 max_rpm = get_max_rpm(enabled_sensors);
424 mint = get_min_temp(enabled_sensors);
425 strmin = psensor_value_to_str(SENSOR_TYPE_TEMP,
427 config->temperature_unit == CELSIUS);
429 maxt = get_max_temp(enabled_sensors);
430 strmax = psensor_value_to_str(SENSOR_TYPE_TEMP,
432 config->temperature_unit == CELSIUS);
434 et = get_graph_end_time_s(enabled_sensors);
435 bt = get_graph_begin_time_s(config, et);
437 str_btime = time_to_str(bt);
438 str_etime = time_to_str(et);
440 gtk_widget_get_allocation(w_graph, &galloc);
441 width = galloc.width;
442 height = galloc.height;
444 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
445 cr = cairo_create(cst);
447 cairo_select_font_face(cr,
449 CAIRO_FONT_SLANT_NORMAL,
450 CAIRO_FONT_WEIGHT_NORMAL);
451 cairo_set_font_size(cr, 10.0);
453 cairo_text_extents(cr, str_etime, &te_etime);
454 cairo_text_extents(cr, str_btime, &te_btime);
455 cairo_text_extents(cr, strmax, &te_max);
456 cairo_text_extents(cr, strmin, &te_min);
458 g_yoff = GRAPH_V_PADDING;
460 g_height = height - GRAPH_V_PADDING;
461 if (te_etime.height > te_btime.height)
462 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
464 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
466 if (te_min.width > te_max.width)
467 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
469 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
471 info.g_xoff = g_xoff;
472 info.g_yoff = g_yoff;
473 info.height = height;
475 style_ctx = gtk_widget_get_style_context(window);
476 gtk_style_context_get_background_color(style_ctx,
477 GTK_STATE_FLAG_NORMAL,
478 &info.theme_bg_color);
479 gtk_style_context_get_color(style_ctx,
480 GTK_STATE_FLAG_NORMAL,
481 &info.theme_fg_color);
484 g_width = width - g_xoff - GRAPH_H_PADDING;
486 draw_graph_background(cr,
487 g_xoff, g_yoff, g_width, g_height,
488 width, height, config,
491 /* Set the color for text drawing */
492 cairo_set_source_rgb(cr,
493 info.theme_fg_color.red,
494 info.theme_fg_color.green,
495 info.theme_fg_color.blue);
497 /* draw graph begin time */
498 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
499 cairo_show_text(cr, str_btime);
502 /* draw graph end time */
504 width - te_etime.width - GRAPH_H_PADDING,
505 height - GRAPH_V_PADDING);
506 cairo_show_text(cr, str_etime);
509 draw_background_lines(cr, fgcolor,
514 /* .. and finaly draws the temperature graphs */
516 sensor_cur = enabled_sensors;
518 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
519 cairo_set_line_width(cr, 1);
521 while (*sensor_cur) {
522 struct psensor *s = *sensor_cur;
525 if (s->type & SENSOR_TYPE_RPM) {
528 } else if (s->type & SENSOR_TYPE_PERCENT) {
530 max = get_max_value(enabled_sensors,
531 SENSOR_TYPE_PERCENT);
537 if (is_smooth_curves_enabled)
538 draw_sensor_smooth_curve(s, cr,
544 draw_sensor_curve(s, cr,
554 display_no_graphs_warning(cr,
559 draw_left_region(cr, &info);
561 /* draw min and max temp */
562 cairo_set_source_rgb(cr,
563 info.theme_fg_color.red,
564 info.theme_fg_color.green,
565 info.theme_fg_color.blue);
567 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
568 cairo_show_text(cr, strmax);
572 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
573 cairo_show_text(cr, strmin);
576 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
579 if (config->alpha_channel_enabled)
580 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
582 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
583 cairo_paint(cr_pixmap);
586 free(enabled_sensors);
588 cairo_destroy(cr_pixmap);
589 cairo_surface_destroy(cst);
593 int compute_values_max_length(struct config *c)
595 int n, duration, interval;
597 duration = c->graph_monitoring_duration * 60;
598 interval = c->sensor_update_interval;
600 n = 3 + ceil((((double)duration) / interval) + 0.5) + 3;