support of fahrenheit option
[psensor.git] / src / graph.c
index bd67a9e..06d7c8b 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2011 jeanfi@gmail.com
+ * Copyright (C) 2010-2012 jeanfi@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
@@ -73,31 +73,57 @@ static char *time_to_str(time_t s)
 
 static void
 draw_graph_background(cairo_t *cr,
-                     int width, int height, struct config *config)
+                     int g_xoff, int g_yoff,
+                     int g_width, int g_height,
+                     int width, int height, struct config *config,
+                     GtkWidget *widget,
+                     GtkWidget *window)
 {
-       struct color *bgcolor = config->graph_bgcolor;
+       GtkStyleContext *style_ctx;
+       struct color *bgcolor;
+       GdkRGBA rgba;
 
-       /* draw background */
+       bgcolor = config->graph_bgcolor;
+
+       style_ctx = gtk_widget_get_style_context(window);
+       gtk_style_context_get_background_color(style_ctx,
+                                              GTK_STATE_FLAG_NORMAL,
+                                              &rgba);
+
+       if (config->alpha_channel_enabled)
+               cairo_set_source_rgba(cr,
+                                     rgba.red,
+                                     rgba.green,
+                                     rgba.blue,
+                                     config->graph_bg_alpha);
+       else
+               cairo_set_source_rgb(cr,
+                                    rgba.red,
+                                    rgba.green,
+                                    rgba.blue);
+
+       cairo_rectangle(cr, 0, 0, width, height);
+       cairo_fill(cr);
        if (config->alpha_channel_enabled)
                cairo_set_source_rgba(cr,
                                      bgcolor->f_red,
                                      bgcolor->f_green,
-                                     bgcolor->f_blue, config->graph_bg_alpha);
+                                     bgcolor->f_blue,
+                                     config->graph_bg_alpha);
        else
                cairo_set_source_rgb(cr,
                                     bgcolor->f_red,
-                                    bgcolor->f_green, bgcolor->f_blue);
+                                    bgcolor->f_green,
+                                    bgcolor->f_blue);
 
-       cairo_rectangle(cr, 0, 0, width, height);
+       cairo_rectangle(cr, g_xoff, g_yoff, g_width, g_height);
        cairo_fill(cr);
 }
 
 /* setup dash style */
 static double dashes[] = {
        1.0,            /* ink */
-       1.0,            /* skip */
-       1.0,            /* ink */
-       1.0             /* skip */
+       2.0,            /* skip */
 };
 static int ndash = sizeof(dashes) / sizeof(dashes[0]);
 
@@ -110,8 +136,8 @@ static void draw_background_lines(cairo_t *cr,
        int i;
 
        /* draw background lines */
-       cairo_set_dash(cr, dashes, ndash, 0);
        cairo_set_line_width(cr, 1);
+       cairo_set_dash(cr, dashes, ndash, 0);
        cairo_set_source_rgb(cr,
                             color->f_red, color->f_green, color->f_blue);
 
@@ -136,7 +162,6 @@ static void draw_background_lines(cairo_t *cr,
 
        /* back to normal line style */
        cairo_set_dash(cr, 0, 0, 0);
-
 }
 
 static void draw_sensor_curve(struct psensor *s,
@@ -150,27 +175,28 @@ static void draw_sensor_curve(struct psensor *s,
                              int g_xoff,
                              int g_yoff)
 {
-       int first = 1;
-       int i;
+       int first, i, x, y, t, dt, vdt;
+       double v;
 
        cairo_set_source_rgb(cr,
                             s->color->f_red,
                             s->color->f_green,
                             s->color->f_blue);
-       cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
-       cairo_set_line_width(cr, 1);
 
+       dt = et - bt;
+       first = 1;
        for (i = 0; i < s->values_max_length; i++) {
-               int x, y, t;
-               double v;
-
                t = s->measures[i].time.tv_sec;
                v = s->measures[i].value.d_num;
 
-               if (v == UNKNOWN_DBL_VALUE || !t || (t - bt) < 0)
+               if (v == UNKNOWN_DBL_VALUE || !t)
+                       continue;
+
+               vdt = t - bt;
+               if (vdt < 0)
                        continue;
 
-               x = (t - bt) * g_width / (et - bt) + g_xoff;
+               x = vdt * g_width / dt + g_xoff;
 
                y = compute_y(v, min, max, g_height, g_yoff);
 
@@ -189,7 +215,8 @@ static void draw_sensor_curve(struct psensor *s,
 void
 graph_update(struct psensor **sensors,
             GtkWidget *w_graph,
-            struct config *config)
+            struct config *config,
+            GtkWidget *window)
 {
        struct color *fgcolor = config->graph_fgcolor;
        int et, bt, width, height, g_width, g_height;
@@ -203,6 +230,8 @@ graph_update(struct psensor **sensors,
        cairo_text_extents_t te_btime, te_etime, te_max, te_min;
        struct psensor **sensor_cur;
        GtkAllocation galloc;
+       GtkStyleContext *style_ctx;
+       GdkRGBA rgba;
 
        if (!gtk_widget_is_drawable(w_graph))
                return ;
@@ -211,10 +240,15 @@ graph_update(struct psensor **sensors,
        max_rpm = get_max_rpm(sensors);
 
        mint = get_min_temp(sensors);
-       strmin = psensor_value_to_string(SENSOR_TYPE_TEMP, mint);
+
+       strmin = psensor_value_to_string(SENSOR_TYPE_TEMP,
+                                        mint,
+                                        config->temperature_unit == CELCIUS);
 
        maxt = get_max_temp(sensors);
-       strmax = psensor_value_to_string(SENSOR_TYPE_TEMP, maxt);
+       strmax = psensor_value_to_string(SENSOR_TYPE_TEMP,
+                                        maxt,
+                                        config->temperature_unit == CELCIUS);
 
        str_btime = time_to_str(get_graph_begin_time_s(config));
        str_etime = time_to_str(get_graph_end_time_s());
@@ -226,8 +260,6 @@ graph_update(struct psensor **sensors,
        cst = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
        cr = cairo_create(cst);
 
-       draw_graph_background(cr, width, height, config);
-
        cairo_select_font_face(cr,
                               "sans-serif",
                               CAIRO_FONT_SLANT_NORMAL,
@@ -254,8 +286,16 @@ graph_update(struct psensor **sensors,
 
        g_width = width - g_xoff - GRAPH_H_PADDING;
 
-       cairo_set_source_rgb(cr,
-                            fgcolor->f_red, fgcolor->f_green, fgcolor->f_blue);
+       draw_graph_background(cr,
+                             g_xoff, g_yoff, g_width, g_height,
+                             width, height, config,
+                             w_graph,
+                             window);
+
+       /** Set the color for text drawing */
+       style_ctx = gtk_widget_get_style_context(window);
+       gtk_style_context_get_color(style_ctx, GTK_STATE_FLAG_NORMAL, &rgba);
+       cairo_set_source_rgb(cr, rgba.red, rgba.green, rgba.blue);
 
        /* draw graph begin time */
        cairo_move_to(cr, g_xoff, height - GRAPH_V_PADDING);
@@ -290,6 +330,9 @@ graph_update(struct psensor **sensors,
 
        if (bt && et) {
                sensor_cur = sensors;
+
+               cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
+               cairo_set_line_width(cr, 1);
                while (*sensor_cur) {
                        struct psensor *s = *sensor_cur;