From: erg <devnull@localhost>
Date: Mon, 1 Feb 2010 21:30:55 +0000 (+0000)
Subject: Fix crash if a click is done but no graph is loaded
X-Git-Tag: LAST_LIBGRAPH~32^2~1457
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5cbc149d992e68c8e3923f285d1c5de1e83abd4b;p=graphviz

Fix crash if a click is done but no graph is loaded
---

diff --git a/cmd/smyrna/gltemplate.c b/cmd/smyrna/gltemplate.c
index 5d01213b1..c024aec7c 100755
--- a/cmd/smyrna/gltemplate.c
+++ b/cmd/smyrna/gltemplate.c
@@ -275,7 +275,10 @@ gboolean expose_event(GtkWidget * widget, GdkEventExpose * event,
 static gboolean button_press_event(GtkWidget * widget,
 				   GdkEventButton * event, gpointer data)
 {
-    Agraph_t* g=view->g[view->activeGraph];
+    Agraph_t* g;
+
+    if (view->g == 0) return FALSE;
+    g=view->g[view->activeGraph];
 
     begin_x = (float) event->x;
     begin_y = (float) event->y;
@@ -301,6 +304,7 @@ static gboolean button_press_event(GtkWidget * widget,
 static gboolean button_release_event(GtkWidget * widget,
 				     GdkEventButton * event, gpointer data)
 {
+    if (view->widgets == 0) return FALSE;
     view->FontSizeConst = GetOGLDistance(14);
     view->arcball->isDragging = 0;
     view->widgets->common.functions.mouseup((glCompObj*)view->widgets,(GLfloat) event->x,(GLfloat) event->y,getGlCompMouseType(event->button));