From 7dae0ae0fb7f516cadbe80a60943995fa6044f56 Mon Sep 17 00:00:00 2001
From: jrheinlaender <jrheinlaender@users.sourceforge.net>
Date: Mon, 15 Jul 2013 07:40:03 +0200
Subject: [PATCH] Allow external references from other body but not from same
 body outside the support

---
 src/Mod/Sketcher/Gui/CommandCreateGeo.cpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp b/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
index 35adb3825a..b60ef85f99 100644
--- a/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
+++ b/src/Mod/Sketcher/Gui/CommandCreateGeo.cpp
@@ -48,6 +48,7 @@
 #include <Gui/SelectionFilter.h>
 #include <Mod/Sketcher/App/SketchObject.h>
 #include <Mod/Part/App/DatumFeature.h>
+#include <Mod/Part/App/BodyBase.h>
 
 #include "ViewProviderSketch.h"
 #include "DrawSketchHandler.h"
@@ -4481,8 +4482,17 @@ namespace SketcherGui {
                pObj->getTypeId().isDerivedFrom(Part::Datum::getClassTypeId()))
                 return true;
 
-            if (!sketch->allowOtherBody && (pObj != support))
-                return false;
+            if (pObj != support) {
+                // Selection outside of support not allowed
+                if (!sketch->allowOtherBody)
+                    return false;
+
+                // Selection outside of support allowed if from other body
+                // TODO: There is still a possibility of creating cyclic references here
+                if (Part::BodyBase::findBodyOf(pObj) == Part::BodyBase::findBodyOf(support))
+                    return false;
+            }
+
             if (!sSubName || sSubName[0] == '\0')
                 return false;
             std::string element(sSubName);