From ddf37d3b01d8c19dc004a423b25c18ab1f7cddc4 Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Thu, 19 Sep 2019 14:11:56 +0200
Subject: [PATCH] Fix under OSX for
 https://github.com/prusa3d/PrusaSlicer/commit/584b37513f54d625f0f3a7490cd63ce48f83a95f

---
 src/slic3r/GUI/GUI_ObjectList.cpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 116f99eb80..47be4b5eb3 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -794,15 +794,26 @@ void ObjectList::list_manipulation(bool evt_context_menu/* = false*/)
     const wxPoint pt = get_mouse_position_in_control();
     HitTest(pt, item, col);
 
+    /* Note: Under OSX right click doesn't send "selection changed" event.
+     * It means that Selection() will be return still previously selected item.
+     * Thus under OSX we should force UnselectAll(), when item and col are nullptr,
+     * and select new item otherwise.
+     */
+
     if (!item) {
-        if (col == nullptr)
-            return;
+        if (wxOSX && col == nullptr)
+            UnselectAll();
         if (evt_context_menu) {
             show_context_menu(evt_context_menu);
             return;
         }
     }
 
+    if (wxOSX && item && col) {
+        UnselectAll();
+        Select(item);
+    }
+
     const wxString title = col->GetTitle();
 
     if (title == " ")