X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/03f856c427096797f0f7a6c93ca7f3ad72f7193e..b0f067190f385284449015d12d592b3f385b6a11:/gtk.c

diff --git a/gtk.c b/gtk.c
index b69e95d..8a26730 100644
--- a/gtk.c
+++ b/gtk.c
@@ -181,10 +181,10 @@ static gint button_event(GtkWidget *widget, GdkEventButton *event,
     if (event->type != GDK_BUTTON_PRESS)
         return TRUE;
 
-    if (event->button == 1)
-	button = LEFT_BUTTON;
-    else if (event->button == 2)
+    if (event->button == 2 || (event->state & GDK_SHIFT_MASK))
 	button = MIDDLE_BUTTON;
+    else if (event->button == 1)
+	button = LEFT_BUTTON;
     else if (event->button == 3)
 	button = RIGHT_BUTTON;
     else