From 06c2b4bdf3d2b5968df38f4d359504d74c5eb1a0 Mon Sep 17 00:00:00 2001
From: Enrico Turri <enricoturri@seznam.cz>
Date: Mon, 4 Mar 2019 11:00:52 +0100
Subject: [PATCH] Allow to drag object's subparts once selected using the
 sidebar table

---
 src/slic3r/GUI/GLCanvas3D.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index b51662325..29d72687b 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -896,7 +896,11 @@ void GLCanvas3D::Selection::add(unsigned int volume_idx, bool as_single_selectio
     if (needs_reset)
         clear();
 
-    m_mode = volume->is_modifier ? Volume : Instance;
+    if (volume->is_modifier)
+        m_mode = Volume;
+    else if (!contains_volume(volume_idx))
+        m_mode = Instance;
+    // else -> keep current mode
 
     switch (m_mode)
     {