From 313e86ea949e258d3870cc1ac157bb6db429c1cc Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Tue, 10 Dec 2019 17:25:30 +0100
Subject: [PATCH] Fixed show context menu for multiple selection in ObjectList

---
 src/slic3r/GUI/GUI_ObjectList.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index d825b740f..1011bfd5e 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -807,7 +807,7 @@ void ObjectList::list_manipulation(bool evt_context_menu/* = false*/)
 
     if (!item) {
         if (col == nullptr) {
-            if (wxOSX)
+            if (wxOSX && !multiple_selection())
                 UnselectAll();
             else if (!evt_context_menu) 
                 // Case, when last item was deleted and under GTK was called wxEVT_DATAVIEW_SELECTION_CHANGED,
@@ -822,8 +822,13 @@ void ObjectList::list_manipulation(bool evt_context_menu/* = false*/)
     }
 
     if (wxOSX && item && col) {
+        wxDataViewItemArray sels;
+        GetSelections(sels);
         UnselectAll();
-        Select(item);
+        if (sels.Count() > 1)
+            SetSelections(sels);
+        else
+            Select(item);
     }
 
     const wxString title = col->GetTitle();