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_width, int g_height,
132 int width, struct config *config,
133 struct graph_info *info)
135 struct color *bgcolor;
137 bgcolor = config->graph_bgcolor;
139 if (config->alpha_channel_enabled)
140 cairo_set_source_rgba(cr,
141 info->theme_bg_color.red,
142 info->theme_bg_color.green,
143 info->theme_bg_color.blue,
144 config->graph_bg_alpha);
146 cairo_set_source_rgb(cr,
147 info->theme_bg_color.red,
148 info->theme_bg_color.green,
149 info->theme_bg_color.blue);
151 cairo_rectangle(cr, info->g_xoff, 0, g_width, info->height);
154 if (config->alpha_channel_enabled)
155 cairo_set_source_rgba(cr,
159 config->graph_bg_alpha);
161 cairo_set_source_rgb(cr,
166 cairo_rectangle(cr, info->g_xoff, info->g_yoff, g_width, g_height);
170 /* setup dash style */
171 static double dashes[] = {
175 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
177 static void draw_background_lines(cairo_t *cr,
179 int g_width, int g_height,
180 int g_xoff, int g_yoff,
185 /* draw background lines */
186 cairo_set_line_width(cr, 1);
187 cairo_set_dash(cr, dashes, ndash, 0);
188 cairo_set_source_rgb(cr,
189 color->red, color->green, color->blue);
191 /* vertical lines representing time steps */
192 for (i = 0; i <= 5; i++) {
193 int x = i * (g_width / 5) + g_xoff;
195 cairo_move_to(cr, x, g_yoff);
196 cairo_line_to(cr, x, g_yoff + g_height);
200 /* horizontal lines draws a line for each 10C step */
201 for (i = min; i < max; i++) {
203 int y = compute_y(i, min, max, g_height, g_yoff);
205 cairo_move_to(cr, g_xoff, y);
206 cairo_line_to(cr, g_xoff + g_width, y);
211 /* back to normal line style */
212 cairo_set_dash(cr, 0, 0, 0);
215 /* Keys: sensor identifier.
217 * Values: array of time_t. Each time_t is corresponding to a sensor
218 * measure which has been used as the start point of a Bezier curve.
220 static GHashTable *times;
222 static void draw_sensor_smooth_curve(struct psensor *s,
233 int i, dt, vdt, j, k, found;
234 double x[4], y[4], v;
235 time_t t, t0, *stimes;
238 times = g_hash_table_new_full(g_str_hash,
243 stimes = g_hash_table_lookup(times, s->id);
245 cairo_set_source_rgb(cr,
250 /* search the index of the first measure used as a start point
251 * of a Bezier curve. The start and end points of the Bezier
252 * curves must be preserved to ensure the same overall shape
256 while (i < s->values_max_length) {
257 t = s->measures[i].time.tv_sec;
258 v = s->measures[i].value;
261 if (v != UNKNOWN_DBL_VALUE && t) {
264 if (t == stimes[k]) {
279 stimes = malloc((s->values_max_length + 1) * sizeof(time_t));
280 memset(stimes, 0, (s->values_max_length + 1) * sizeof(time_t));
281 g_hash_table_insert(times, strdup(s->id), stimes);
283 if (i == s->values_max_length)
288 while (i < s->values_max_length) {
291 while (i < s->values_max_length && j < 4) {
292 t = s->measures[i].time.tv_sec;
293 v = s->measures[i].value;
295 if (v == UNKNOWN_DBL_VALUE || !t) {
302 x[0 + j] = ((double)vdt * g_width) / dt + g_xoff;
303 y[0 + j] = compute_y(v, min, max, g_height, g_yoff);
313 cairo_move_to(cr, x[0], y[0]);
314 cairo_curve_to(cr, x[1], y[1], x[2], y[3], x[3], y[3]);
323 static void draw_sensor_curve(struct psensor *s,
334 int first, i, t, dt, vdt;
337 cairo_set_source_rgb(cr,
344 for (i = 0; i < s->values_max_length; i++) {
345 t = s->measures[i].time.tv_sec;
346 v = s->measures[i].value;
348 if (v == UNKNOWN_DBL_VALUE || !t)
353 x = ((double)vdt * g_width) / dt + g_xoff;
355 y = compute_y(v, min, max, g_height, g_yoff);
358 cairo_move_to(cr, x, y);
361 cairo_line_to(cr, x, y);
368 static void display_no_graphs_warning(cairo_t *cr, int x, int y)
372 msg = strdup(_("No graphs enabled"));
374 cairo_select_font_face(cr,
376 CAIRO_FONT_SLANT_NORMAL,
377 CAIRO_FONT_WEIGHT_NORMAL);
378 cairo_set_font_size(cr, 18.0);
380 cairo_move_to(cr, x, y);
381 cairo_show_text(cr, msg);
387 graph_update(struct psensor **sensors,
389 struct config *config,
392 struct color *fgcolor = config->graph_fgcolor;
393 int et, bt, width, height, g_width, g_height;
394 double min_rpm, max_rpm, mint, maxt, min, max;
395 char *strmin, *strmax;
396 /* horizontal and vertical offset of the graph */
397 int g_xoff, g_yoff, no_graphs;
398 cairo_surface_t *cst;
399 cairo_t *cr, *cr_pixmap;
400 char *str_btime, *str_etime;
401 cairo_text_extents_t te_btime, te_etime, te_max, te_min;
402 struct psensor **sensor_cur, **enabled_sensors;
403 GtkAllocation galloc;
404 GtkStyleContext *style_ctx;
405 struct graph_info info;
407 if (!gtk_widget_is_drawable(w_graph))
410 enabled_sensors = psensor_list_filter_graph_enabled(sensors);
412 min_rpm = get_min_rpm(enabled_sensors);
413 max_rpm = get_max_rpm(enabled_sensors);
415 mint = get_min_temp(enabled_sensors);
416 strmin = psensor_value_to_str(SENSOR_TYPE_TEMP,
418 config->temperature_unit == CELSIUS);
420 maxt = get_max_temp(enabled_sensors);
421 strmax = psensor_value_to_str(SENSOR_TYPE_TEMP,
423 config->temperature_unit == CELSIUS);
425 et = get_graph_end_time_s(enabled_sensors);
426 bt = get_graph_begin_time_s(config, et);
428 str_btime = time_to_str(bt);
429 str_etime = time_to_str(et);
431 gtk_widget_get_allocation(w_graph, &galloc);
432 width = galloc.width;
433 height = galloc.height;
435 cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
436 cr = cairo_create(cst);
438 cairo_select_font_face(cr,
440 CAIRO_FONT_SLANT_NORMAL,
441 CAIRO_FONT_WEIGHT_NORMAL);
442 cairo_set_font_size(cr, 10.0);
444 cairo_text_extents(cr, str_etime, &te_etime);
445 cairo_text_extents(cr, str_btime, &te_btime);
446 cairo_text_extents(cr, strmax, &te_max);
447 cairo_text_extents(cr, strmin, &te_min);
449 g_yoff = GRAPH_V_PADDING;
451 g_height = height - GRAPH_V_PADDING;
452 if (te_etime.height > te_btime.height)
453 g_height -= GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
455 g_height -= GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
457 if (te_min.width > te_max.width)
458 g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
460 g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
462 info.g_xoff = g_xoff;
463 info.g_yoff = g_yoff;
464 info.height = height;
466 style_ctx = gtk_widget_get_style_context(window);
467 gtk_style_context_get_background_color(style_ctx,
468 GTK_STATE_FLAG_NORMAL,
469 &info.theme_bg_color);
470 gtk_style_context_get_color(style_ctx,
471 GTK_STATE_FLAG_NORMAL,
472 &info.theme_fg_color);
475 g_width = width - g_xoff - GRAPH_H_PADDING;
477 draw_graph_background(cr,
482 /* Set the color for text drawing */
483 cairo_set_source_rgb(cr,
484 info.theme_fg_color.red,
485 info.theme_fg_color.green,
486 info.theme_fg_color.blue);
488 /* draw graph begin time */
489 cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
490 cairo_show_text(cr, str_btime);
493 /* draw graph end time */
495 width - te_etime.width - GRAPH_H_PADDING,
496 height - GRAPH_V_PADDING);
497 cairo_show_text(cr, str_etime);
500 draw_background_lines(cr, fgcolor,
505 /* .. and finaly draws the temperature graphs */
507 sensor_cur = enabled_sensors;
509 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
510 cairo_set_line_width(cr, 1);
512 while (*sensor_cur) {
513 struct psensor *s = *sensor_cur;
516 if (s->type & SENSOR_TYPE_RPM) {
519 } else if (s->type & SENSOR_TYPE_PERCENT) {
521 max = get_max_value(enabled_sensors,
522 SENSOR_TYPE_PERCENT);
528 if (is_smooth_curves_enabled)
529 draw_sensor_smooth_curve(s, cr,
535 draw_sensor_curve(s, cr,
545 display_no_graphs_warning(cr,
550 draw_left_region(cr, &info);
552 /* draw min and max temp */
553 cairo_set_source_rgb(cr,
554 info.theme_fg_color.red,
555 info.theme_fg_color.green,
556 info.theme_fg_color.blue);
558 cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
559 cairo_show_text(cr, strmax);
563 GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
564 cairo_show_text(cr, strmin);
567 cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
570 if (config->alpha_channel_enabled)
571 cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
573 cairo_set_source_surface(cr_pixmap, cst, 0, 0);
574 cairo_paint(cr_pixmap);
577 free(enabled_sensors);
579 cairo_destroy(cr_pixmap);
580 cairo_surface_destroy(cst);
584 int compute_values_max_length(struct config *c)
586 int n, duration, interval;
588 duration = c->graph_monitoring_duration * 60;
589 interval = c->sensor_update_interval;
591 n = 3 + ceil((((double)duration) / interval) + 0.5) + 3;