From 6962b8dddd59624f914bc0508b1a1cadd22f0dfa Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Wed, 7 Jan 2015 11:58:22 +0100
Subject: [PATCH] Glitches when panning with middle mouse button. #2454

---
 lib/Slic3r/GUI/PreviewCanvas.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Slic3r/GUI/PreviewCanvas.pm b/lib/Slic3r/GUI/PreviewCanvas.pm
index 61a2b20b4..67bc49757 100644
--- a/lib/Slic3r/GUI/PreviewCanvas.pm
+++ b/lib/Slic3r/GUI/PreviewCanvas.pm
@@ -208,7 +208,7 @@ sub mouse_event {
             }
             $self->_drag_start_xy($pos);
         }
-    } elsif ($e->LeftUp || $e->RightUp) {
+    } elsif ($e->LeftUp || $e->MiddleUp || $e->RightUp) {
         if ($self->on_move && defined $self->_drag_volume_idx) {
             $self->on_move->($self->_drag_volume_idx) if $self->_dragged;
         }