--- /dev/null
+/*
+ Copyright (C) 2010-2011 wpitchoune@gmail.com
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301 USA
+*/
+
+#include <stdlib.h>
+#include <sys/time.h>
+#include <gtk/gtk.h>
+
+#include "cfg.h"
+#include "psensor.h"
+
+/* horizontal padding */
+#define GRAPH_H_PADDING 4
+/* vertical padding */
+#define GRAPH_V_PADDING 4
+
+time_t get_graph_end_time_s()
+{
+ struct timeval tv;
+
+ if (gettimeofday(&tv, NULL) == 0)
+ return tv.tv_sec;
+ else
+ return 0;
+}
+
+time_t get_graph_begin_time_s(struct config *cfg)
+{
+ int ct;
+
+ ct = get_graph_end_time_s();
+
+ if (!ct)
+ return 0;
+
+ return ct - cfg->graph_monitoring_duration * 60;
+}
+
+int compute_y(float temp, int mint, int maxt, int width, int height)
+{
+ double t = temp - mint;
+ return height - ((double)height * (t / (maxt - mint)));
+}
+
+char *time_to_str(time_t s)
+{
+ char *str;
+ /* note: localtime returns a static field, no free required */
+ struct tm *tm = localtime(&s);
+
+ if (!tm)
+ return NULL;
+
+ str = malloc(6);
+ strftime(str, 6, "%H:%M", tm);
+
+ return str;
+}
+
+void
+draw_graph_background(cairo_t *cr,
+ int width, int height, struct config *config)
+{
+ struct color *bgcolor = config->graph_bgcolor;
+
+ /* draw background */
+ if (config->alpha_channel_enabled)
+ cairo_set_source_rgba(cr,
+ bgcolor->f_red,
+ bgcolor->f_green,
+ bgcolor->f_blue, config->graph_bg_alpha);
+ else
+ cairo_set_source_rgb(cr,
+ bgcolor->f_red,
+ bgcolor->f_green, bgcolor->f_blue);
+
+ cairo_rectangle(cr, 0, 0, width, height);
+ cairo_fill(cr);
+}
+
+void
+graph_update(struct psensor **sensors,
+ GtkWidget *w_graph, struct config *config)
+{
+ struct color *fgcolor = config->graph_fgcolor;
+ int et, bt;
+ int min_rpm = get_min_rpm(sensors);
+ int max_rpm = get_max_rpm(sensors);
+
+ int mint = get_min_temp(sensors);
+ char *strmin = psensor_value_to_string(SENSOR_TYPE_TEMP, mint);
+
+ int maxt = get_max_temp(sensors);
+ char *strmax = psensor_value_to_string(SENSOR_TYPE_TEMP, maxt);
+
+ int width = w_graph->allocation.width;
+ int height = w_graph->allocation.height;
+
+ int g_width;
+
+ /* horizontal and vertical offset of the graph */
+ int g_xoff, g_yoff;
+
+ int g_height;
+
+ cairo_surface_t *cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+ width,
+ height);
+ cairo_t *cr = cairo_create(cst);
+ cairo_t *cr_pixmap;
+
+ char *str_btime = time_to_str(get_graph_begin_time_s(config));
+ cairo_text_extents_t te_btime;
+
+ char *str_etime = time_to_str(get_graph_end_time_s());
+ cairo_text_extents_t te_etime;
+
+ /* setup dash style */
+ double dashes[] = {
+ 1.0, /* ink */
+ 1.0, /* skip */
+ 1.0, /* ink */
+ 1.0 /* skip */
+ };
+ int ndash = sizeof(dashes) / sizeof(dashes[0]);
+
+ int i;
+
+ cairo_text_extents_t te_max, te_min;
+
+ struct psensor **sensor_cur;
+
+ draw_graph_background(cr, width, height, config);
+
+ cairo_select_font_face(cr,
+ "sans-serif",
+ CAIRO_FONT_SLANT_NORMAL,
+ CAIRO_FONT_WEIGHT_NORMAL);
+ cairo_set_font_size(cr, 10.0);
+
+ cairo_text_extents(cr, str_etime, &te_etime);
+ cairo_text_extents(cr, str_btime, &te_btime);
+ cairo_text_extents(cr, strmax, &te_max);
+ cairo_text_extents(cr, strmin, &te_min);
+
+ if (te_etime.height > te_btime.height)
+ g_yoff = GRAPH_V_PADDING + te_etime.height + GRAPH_V_PADDING;
+ else
+ g_yoff = GRAPH_V_PADDING + te_btime.height + GRAPH_V_PADDING;
+
+ if (te_min.width > te_max.width)
+ g_xoff = (2 * GRAPH_H_PADDING) + te_max.width;
+ else
+ g_xoff = (2 * GRAPH_H_PADDING) + te_min.width;
+
+ g_width = width - g_xoff;
+
+ cairo_set_source_rgb(cr,
+ fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
+
+ g_height = height - g_yoff - GRAPH_V_PADDING;
+
+ /* draw graph begin time */
+ cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
+ cairo_show_text(cr, str_btime);
+ free(str_btime);
+
+ /* draw graph end time */
+ cairo_move_to(cr,
+ width - te_etime.width - GRAPH_H_PADDING,
+ height - GRAPH_V_PADDING);
+ cairo_show_text(cr, str_etime);
+ free(str_etime);
+
+ /* draw min and max temp */
+ cairo_move_to(cr, GRAPH_H_PADDING, te_max.height + GRAPH_V_PADDING);
+ cairo_show_text(cr, strmax);
+ free(strmax);
+
+ cairo_move_to(cr,
+ GRAPH_H_PADDING, height - (te_min.height / 2) - g_yoff);
+ cairo_show_text(cr, strmin);
+ free(strmin);
+
+ /* draw background lines */
+ cairo_set_dash(cr, dashes, ndash, 0);
+ cairo_set_line_width(cr, 1);
+ cairo_set_source_rgb(cr,
+ fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
+
+ /* vertical lines representing time steps */
+ for (i = 0; i <= 5; i++) {
+ int x = i * (g_width / 5) + g_xoff;
+ cairo_move_to(cr, x, GRAPH_V_PADDING);
+ cairo_line_to(cr, x, height - g_yoff);
+ cairo_stroke(cr);
+ }
+
+ /* horizontal lines draws a line for each 10C step */
+ for (i = mint; i < maxt; i++) {
+ if (i % 10 == 0) {
+ int y = compute_y(i, mint, maxt, width, g_height)
+ + GRAPH_V_PADDING;
+ cairo_move_to(cr, g_xoff, y);
+ cairo_line_to(cr, width - GRAPH_H_PADDING, y);
+ cairo_stroke(cr);
+ }
+ }
+
+ /* back to normal line style */
+ cairo_set_dash(cr, 0, 0, 0);
+
+ /* .. and finaly draws the temperature graphs */
+ bt = get_graph_begin_time_s(config);
+ et = get_graph_end_time_s();
+
+ sensor_cur = sensors;
+ while (*sensor_cur) {
+ struct psensor *s = *sensor_cur;
+
+ if (s->enabled) {
+ int first = 1;
+ int i;
+
+ cairo_set_source_rgb(cr,
+ s->color->f_red,
+ s->color->f_green,
+ s->color->f_blue);
+ cairo_set_line_width(cr, 1);
+
+ for (i = 0; i < s->values_max_length; i++) {
+ int min, max, x, y, t, v;
+
+ t = s->measures[i].time.tv_sec;
+ v = s->measures[i].value;
+
+ if (!v || !t || !bt || !et || (t - bt) < 0)
+ continue;
+
+ if (is_fan_type(s->type)) {
+ min = min_rpm;
+ max = max_rpm;
+ } else {
+ min = mint;
+ max = maxt;
+ }
+
+ x = (t - bt) * g_width / (et - bt) + g_xoff;
+
+ y = compute_y(v, min, max, g_width, g_height)
+ + GRAPH_V_PADDING;
+
+ if (first) {
+ cairo_move_to(cr, x, y);
+ first = 0;
+ } else {
+ cairo_line_to(cr, x, y);
+ }
+
+ }
+ cairo_stroke(cr);
+ }
+
+ sensor_cur++;
+ }
+
+ cr_pixmap = gdk_cairo_create(w_graph->window);
+
+ if (cr_pixmap) {
+
+ if (config->alpha_channel_enabled)
+ cairo_set_operator(cr_pixmap, CAIRO_OPERATOR_SOURCE);
+
+ cairo_set_source_surface(cr_pixmap, cst, 0, 0);
+ cairo_paint(cr_pixmap);
+ }
+
+ cairo_destroy(cr_pixmap);
+ cairo_surface_destroy(cst);
+ cairo_destroy(cr);
+}
projects / psensor.git / blobdiff