Don't draw tooltips if no profile is displayed

This fixes ticket 33

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

2 files changed, 7 insertions, 2 deletions

diff --git a/gtk-gui.c b/gtk-gui.c
index 842a28740..a2681de0f 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -1302,6 +1302,10 @@ static gboolean profile_tooltip (GtkWidget *widget, gint x, gint y,
 	if (tx < 0 || ty < 0)
 		return FALSE;
 
+	/* don't draw a tooltip if nothing is there */
+	if (gc->pi.nr == 0)
+		return FALSE;
+
 	width = drawing_area->width - 2*drawing_area->x;
 	height = drawing_area->height - 2*drawing_area->y;
 	if (width <= 0 || height <= 0)
diff --git a/profile.c b/profile.c
index 4b02f9bc1..f8b4bd168 100644
--- a/profile.c
+++ b/profile.c
@@ -2120,7 +2120,7 @@ void get_plot_details(struct graphics_context *gc, int time, char *buf, size_t b
 {
 	struct plot_info *pi = &gc->pi;
 	int pressure = 0, temp = 0;
-	struct plot_data *entry;
+	struct plot_data *entry = NULL;
 	int i;
 
 	for (i = 0; i < pi->nr; i++) {
@@ -2132,5 +2132,6 @@ void get_plot_details(struct graphics_context *gc, int time, char *buf, size_t b
 		if (entry->sec >= time)
 			break;
 	}
-	plot_string(entry, buf, bufsize, entry->depth, pressure, temp, pi->has_ndl);
+	if (entry)
+		plot_string(entry, buf, bufsize, entry->depth, pressure, temp, pi->has_ndl);
 }