From c6b62ed0a81214ec5dac01eb53068f74033bd174 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Orsini <jeanfi@gmail.com>
Date: Sat, 6 Oct 2012 09:06:34 +0000
Subject: [PATCH] added message when no sensor graphs are enabled. 
 (Closes: #689355)

---
 NEWS             |  1 +
 debian/changelog |  2 ++
 src/graph.c      | 31 ++++++++++++++++++++++++++++---
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/NEWS b/NEWS
index 538a835..f47075c 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,7 @@
 ** fixed cppcheck reported errors (realloc and not freed var).
 ** added faq (requires asciidoc to build the html version).
 ** check target is now running cppcheck if installed.
+** display message if no graphs are enabled (Closes #689355).
 
 * v0.7.0.3
 
diff --git a/debian/changelog b/debian/changelog
index 555bcd0..592310a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ psensor (0.7.0.x-0ubuntu1) unstable; urgency=low
   * New upstream
       + fixed realloc null returned value not handled in amd.c.
       + fixed url var in main function not freed.
+      + added message when no sensor graphs are enabled.
+	(Closes: #689355)
   * debian/control
       + added builddep to cppcheck.
       + added builddep to asciidoc.
diff --git a/src/graph.c b/src/graph.c
index 679b9c6..0203903 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -17,10 +17,15 @@
  * 02110-1301 USA
  */
 #include <stdlib.h>
+#include <string.h>
+
 #include <sys/time.h>
+
+#include <glib/gi18n.h>
 #include <gtk/gtk.h>
 
 #include "cfg.h"
+#include "log.h"
 #include "psensor.h"
 
 /* horizontal padding */
@@ -211,6 +216,23 @@ static void draw_sensor_curve(struct psensor *s,
 	cairo_stroke(cr);
 }
 
+static void display_no_graphs_warning(cairo_t *cr, int x, int y)
+{
+	char *msg;
+
+	msg = strdup(_("No graphs enabled"));
+
+	cairo_select_font_face(cr,
+			       "sans-serif",
+			       CAIRO_FONT_SLANT_NORMAL,
+			       CAIRO_FONT_WEIGHT_NORMAL);
+	cairo_set_font_size(cr, 18.0);
+
+	cairo_move_to(cr, x, y);
+	cairo_show_text(cr, msg);
+
+	free(msg);
+}
 
 void
 graph_update(struct psensor **sensors,
@@ -223,7 +245,7 @@ graph_update(struct psensor **sensors,
 	double min_rpm, max_rpm, mint, maxt;
 	char *strmin, *strmax;
 	/* horizontal and vertical offset of the graph */
-	int g_xoff, g_yoff;
+	int g_xoff, g_yoff, no_graphs, min, max;
 	cairo_surface_t *cst;
 	cairo_t *cr, *cr_pixmap;
 	char *str_btime, *str_etime;
@@ -333,12 +355,12 @@ graph_update(struct psensor **sensors,
 
 		cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
 		cairo_set_line_width(cr, 1);
+		no_graphs = 1;
 		while (*sensor_cur) {
 			struct psensor *s = *sensor_cur;
 
 			if (s->enabled) {
-				double min, max;
-
+				no_graphs = 0;
 				if (is_fan_type(s->type)) {
 					min = min_rpm;
 					max = max_rpm;
@@ -361,6 +383,9 @@ graph_update(struct psensor **sensors,
 
 			sensor_cur++;
 		}
+
+		if (no_graphs)
+			display_no_graphs_warning(cr, g_xoff + 12, g_height /2);
 	}
 
 	cr_pixmap = gdk_cairo_create(gtk_widget_get_window(w_graph));
-- 
2.7.4