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;
51 /* Foreground color of the current desktop theme */
52 GdkRGBA theme_fg_color;
56 /* Return the end time of the graph i.e. the more recent measure. If
57 * no measure are available, return 0.
59 static time_t get_graph_end_time_s(struct psensor **sensors)
63 struct measure *measures;
69 measures = s->measures;
71 for (i = s->values_max_length - 1; i >= 0; i--) {
72 if (measures[i].value != UNKNOWN_DBL_VALUE) {
73 t = measures[i].time.tv_sec;
87 static time_t get_graph_begin_time_s(struct config *cfg, time_t etime)
92 return etime - cfg->graph_monitoring_duration * 60;
96 compute_y(double value, double min, double max, int height, int off)
98 double t = value - min;
100 return height - ((double)height * (t / (max - min))) + off;
103 static char *time_to_str(time_t s)
106 /* note: localtime returns a static field, no free required */
107 struct tm *tm = localtime(&s);
113 strftime(str, 6, "%H:%M", tm);
118 static void draw_left_region(cairo_t *cr, struct graph_info *info)
120 cairo_set_source_rgb(cr,
121 info->theme_bg_color.red,
122 info->theme_bg_color.green,
123 info->theme_bg_color.blue);
125 cairo_rectangle(cr, 0, 0, info->g_xoff, info->height);
130 draw_graph_background(cairo_t *cr,
131 int g_xoff, int g_yoff,
132 int g_width, int g_height,
133 int width, struct config *config,
134 struct graph_info *info)
136 struct color *bgcolor;
138 bgcolor = config->graph_bgcolor;
140 if (config->alpha_channel_enabled)
141 cairo_set_source_rgba(cr,
142 info->theme_bg_color.red,
143 info->theme_bg_color.green,
144 info->theme_bg_color.blue,
145 config->graph_bg_alpha);
147 cairo_set_source_rgb(cr,
148 info->theme_bg_color.red,
149 info->theme_bg_color.green,
150 info->theme_bg_color.blue);
152 cairo_rectangle(cr, g_xoff, 0, g_width, info->height);
155 if (config->alpha_channel_enabled)
156 cairo_set_source_rgba(cr,
160 config->graph_bg_alpha);
162 cairo_set_source_rgb(cr,
167 cairo_rectangle(cr, g_xoff, g_yoff, g_width, g_height);
171 /* setup dash style */
172 static double dashes[] = {
176 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
178 static void draw_background_lines(cairo_t *cr,
180 int g_width, int g_height,
181 int g_xoff, int g_yoff,
186 /* draw background lines */
187 cairo_set_line_width(cr, 1);
188 cairo_set_dash(cr, dashes, ndash, 0);
189 cairo_set_source_rgb(cr,
190 color->red, color->green, color->blue);
192 /* vertical lines representing time steps */
193 for (i = 0; i <= 5; i++) {
194 int x = i * (g_width / 5) + g_xoff;
196 cairo_move_to(cr, x, g_yoff);
197 cairo_line_to(cr, x, g_yoff + g_height);
201 /* horizontal lines draws a line for each 10C step */
202 for (i = min; i < max; i++) {
204 int y = compute_y(i, min, max, g_height, g_yoff);
206 cairo_move_to(cr, g_xoff, y);
207 cairo_line_to(cr, g_xoff + g_width, y);
212 /* back to normal line style */
213 cairo_set_dash(cr, 0, 0, 0);
216 /* Keys: sensor identifier.
218 * Values: array of time_t. Each time_t is corresponding to a sensor
219 * measure which has been used as the start point of a Bezier curve.
221 static GHashTable *times;
223 static void draw_sensor_smooth_curve(struct psensor *s,
234 int i, dt, vdt, j, k, found;
235 double x[4], y[4], v;
236 time_t t, t0, *stimes;
239 times = g_hash_table_new_full(g_str_hash,
244 stimes = g_hash_table_lookup(times, s->id);
246 cairo_set_source_rgb(cr,
251 /* search the index of the first measure used as a start point
252 * of a Bezier curve. The start and end points of the Bezier
253 * curves must be preserved to ensure the same overall shape
257 while (i < s->values_max_length) {
258 t = s->measures[i].time.tv_sec;
259 v = s->measures[i].value;
262 if (v != UNKNOWN_DBL_VALUE && t) {
265 if (t == stimes[k]) {
280 stimes = malloc((s->values_max_length + 1) * sizeof(time_t));
281 memset(stimes, 0, (s->values_max_length + 1) * sizeof(time_t));
282 g_hash_table_insert(times, strdup(s->id), stimes);
284 if (i == s->values_max_length)
289 while (i < s->values_max_length) {
292 while (i < s->values_max_length && j < 4) {
293 t = s->measures[i].time.tv_sec;
294 v = s->measures[i].value;
296 if (v == UNKNOWN_DBL_VALUE || !t) {
303 x[0 + j] = ((double)vdt * g_width) / dt + g_xoff;
304 y[0 + j] = compute_y(v, min, max, g_height, g_yoff);
314 cairo_move_to(cr, x[0], y[0]);
315 cairo_curve_to(cr, x[1], y[1], x[2], y[3], x[3], y[3]);
324 static void draw_sensor_curve(struct psensor *s,
335 int first, i, t, dt, vdt;
338 cairo_set_source_rgb(cr,
345 for (i = 0; i < s->values_max_length; i++) {
346 t = s->measures[i].time.tv_sec;
347 v = s->measures[i].value;
349 if (v == UNKNOWN_DBL_VALUE || !t)
354 x = ((double)vdt * g_width) / dt + g_xoff;
356 y = compute_y(v, min, max, g_height, g_yoff);
359 cairo_move_to(cr, x, y);
362 cairo_line_to(cr, x, y);
369 static void display_no_graphs_warning(cairo_t *cr, int x, int y)
373 msg = strdup(_("No graphs enabled"));
375 cairo_select_font_face(cr,
377 CAIRO_FONT_SLANT_NORMAL,
378 CAIRO_FONT_WEIGHT_NORMAL);
379 cairo_set_font_size(cr, 18.0);
381 cairo_move_to(cr, x, y);
382 cairo_show_text(cr, msg);
388 graph_update(struct psensor **sensors,
390 struct config *config,
393 struct color *fgcolor = config->graph_fgcolor;
394 int et, bt, width, height, g_width, g_height;
395 double min_rpm, max_rpm, mint, maxt, min, max;
396 char *strmin, *strmax;
397 /* horizontal and vertical offset of the graph */
398 int g_xoff, g_yoff, no_graphs;
399 cairo_surface_t *cst;
400 cairo_t *cr, *cr_pixmap;
401 char *str_btime, *str_etime;
402 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
403 struct psensor **sensor_cur, **enabled_sensors;
404 GtkAllocation galloc;
405 GtkStyleContext *style_ctx;
406 struct graph_info info;
408 if (!gtk_widget_is_drawable(w_graph))
411 enabled_sensors = psensor_list_filter_graph_enabled(sensors);
413 min_rpm = get_min_rpm(enabled_sensors);
414 max_rpm = get_max_rpm(enabled_sensors);
416 mint = get_min_temp(enabled_sensors);
417 strmin = psensor_value_to_str(SENSOR_TYPE_TEMP,
419 config->temperature_unit == CELSIUS);
421 maxt = get_max_temp(enabled_sensors);
422 strmax = psensor_value_to_str(SENSOR_TYPE_TEMP,
424 config->temperature_unit == CELSIUS);
426 et = get_graph_end_time_s(enabled_sensors);
427 bt = get_graph_begin_time_s(config, et);
429 str_btime = time_to_str(bt);
430 str_etime = time_to_str(et);
432 gtk_widget_get_allocation(w_graph, &galloc);
433 width = galloc.width;
434 height = galloc.height;
436 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
437 cr = cairo_create(cst);
439 cairo_select_font_face(cr,
441 CAIRO_FONT_SLANT_NORMAL,
442 CAIRO_FONT_WEIGHT_NORMAL);
443 cairo_set_font_size(cr, 10.0);
445 cairo_text_extents(cr, str_etime, &te_etime);
446 cairo_text_extents(cr, str_btime, &te_btime);
447 cairo_text_extents(cr, strmax, &te_max);
448 cairo_text_extents(cr, strmin, &te_min);
450 g_yoff = GRAPH_V_PADDING;
452 g_height = height - GRAPH_V_PADDING;
453 if (te_etime.height > te_btime.height)
454 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
456 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
458 if (te_min.width > te_max.width)
459 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
461 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
463 info.g_xoff = g_xoff;
464 info.g_yoff = g_yoff;
465 info.height = height;
467 style_ctx = gtk_widget_get_style_context(window);
468 gtk_style_context_get_background_color(style_ctx,
469 GTK_STATE_FLAG_NORMAL,
470 &info.theme_bg_color);
471 gtk_style_context_get_color(style_ctx,
472 GTK_STATE_FLAG_NORMAL,
473 &info.theme_fg_color);
476 g_width = width - g_xoff - GRAPH_H_PADDING;
478 draw_graph_background(cr,
479 g_xoff, g_yoff, g_width, g_height,
483 /* Set the color for text drawing */
484 cairo_set_source_rgb(cr,
485 info.theme_fg_color.red,
486 info.theme_fg_color.green,
487 info.theme_fg_color.blue);
489 /* draw graph begin time */
490 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
491 cairo_show_text(cr, str_btime);
494 /* draw graph end time */
496 width - te_etime.width - GRAPH_H_PADDING,
497 height - GRAPH_V_PADDING);
498 cairo_show_text(cr, str_etime);
501 draw_background_lines(cr, fgcolor,
506 /* .. and finaly draws the temperature graphs */
508 sensor_cur = enabled_sensors;
510 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
511 cairo_set_line_width(cr, 1);
513 while (*sensor_cur) {
514 struct psensor *s = *sensor_cur;
517 if (s->type & SENSOR_TYPE_RPM) {
520 } else if (s->type & SENSOR_TYPE_PERCENT) {
522 max = get_max_value(enabled_sensors,
523 SENSOR_TYPE_PERCENT);
529 if (is_smooth_curves_enabled)
530 draw_sensor_smooth_curve(s, cr,
536 draw_sensor_curve(s, cr,
546 display_no_graphs_warning(cr,
551 draw_left_region(cr, &info);
553 /* draw min and max temp */
554 cairo_set_source_rgb(cr,
555 info.theme_fg_color.red,
556 info.theme_fg_color.green,
557 info.theme_fg_color.blue);
559 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
560 cairo_show_text(cr, strmax);
564 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
565 cairo_show_text(cr, strmin);
568 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
571 if (config->alpha_channel_enabled)
572 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
574 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
575 cairo_paint(cr_pixmap);
578 free(enabled_sensors);
580 cairo_destroy(cr_pixmap);
581 cairo_surface_destroy(cst);
585 int compute_values_max_length(struct config *c)
587 int n, duration, interval;
589 duration = c->graph_monitoring_duration * 60;
590 interval = c->sensor_update_interval;
592 n = 3 + ceil((((double)duration) / interval) + 0.5) + 3;