From 12c91f4283c01ba7f18ef02de29e653e5e26c846 Mon Sep 17 00:00:00 2001
From: Enrico Turri <enricoturri@seznam.cz>
Date: Mon, 4 Mar 2019 10:44:40 +0100
Subject: [PATCH 1/4] Removed reset of gcode preview from
 schedule_background_process()

---
 src/slic3r/GUI/Plater.cpp | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 7a41e06e5..87b41c238 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -1997,9 +1997,6 @@ void Plater::priv::schedule_background_process()
     this->background_process_timer.Start(500, wxTIMER_ONE_SHOT);
     // Notify the Canvas3D that something has changed, so it may invalidate some of the layer editing stuff.
     this->view3D->get_canvas3d()->set_config(this->config);
-    // Reset gcode preview
-    this->preview->get_canvas3d()->reset_volumes();
-    this->preview->get_canvas3d()->reset_legend_texture();
 }
 
 void Plater::priv::update_print_volume_state()

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 2/4] 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)
     {

From 8050b93bf9af751de19103038bb90cb60c99fcf5 Mon Sep 17 00:00:00 2001
From: Maeyanie <me@maeyanie.com>
Date: Sat, 2 Mar 2019 01:40:24 -0500
Subject: [PATCH 3/4] Fix compile error

At least on my system (Fedora 28) gcc gave a compile error for std::vector being used here despite being undefined.
Adding the appropriate include fixes the problem, and seems unlikely to cause any other problems.
---
 src/slic3r/GUI/KBShortcutsDialog.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/KBShortcutsDialog.hpp b/src/slic3r/GUI/KBShortcutsDialog.hpp
index c5f60f0b8..d8905e1ce 100644
--- a/src/slic3r/GUI/KBShortcutsDialog.hpp
+++ b/src/slic3r/GUI/KBShortcutsDialog.hpp
@@ -3,6 +3,7 @@
 
 #include <wx/wx.h>
 #include <map>
+#include <vector>
 
 namespace Slic3r { 
 namespace GUI {

From 4b134b29e63bc8951136bc342b7a1d868fdb77c2 Mon Sep 17 00:00:00 2001
From: Maeyanie <me@maeyanie.com>
Date: Sat, 2 Mar 2019 01:45:20 -0500
Subject: [PATCH 4/4] Fix compile error, part 2

Another undefined use of std::vector
---
 src/slic3r/GUI/GUI_ObjectSettings.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/GUI_ObjectSettings.hpp b/src/slic3r/GUI/GUI_ObjectSettings.hpp
index 3e72713bf..12115e208 100644
--- a/src/slic3r/GUI/GUI_ObjectSettings.hpp
+++ b/src/slic3r/GUI/GUI_ObjectSettings.hpp
@@ -2,6 +2,7 @@
 #define slic3r_GUI_ObjectSettings_hpp_
 
 #include <memory>
+#include <vector>
 #include <wx/panel.h>
 
 class wxBoxSizer;