From cf1eeaab19da2d2a6eaaba3ae6bd1fc8ad620552 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 17 Apr 2024 10:00:14 +0200
Subject: [PATCH] Gui: In property editor disable widget of Placement property
 is not part of a DocumentObject

---
 src/Gui/propertyeditor/PropertyItem.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Gui/propertyeditor/PropertyItem.cpp b/src/Gui/propertyeditor/PropertyItem.cpp
index f1cfcb42ce..68f47ab629 100644
--- a/src/Gui/propertyeditor/PropertyItem.cpp
+++ b/src/Gui/propertyeditor/PropertyItem.cpp
@@ -2713,7 +2713,13 @@ QWidget* PropertyPlacementItem::createEditor(QWidget* parent, const QObject* rec
 {
     auto pe = new PlacementEditor(this->propertyName(), parent);
     QObject::connect(pe, SIGNAL(valueChanged(const QVariant &)), receiver, method);
-    pe->setDisabled(isReadOnly());
+
+    // The Placement dialog only works if property is part of a DocumentObject
+    bool readonly = isReadOnly();
+    if (auto prop = getFirstProperty()) {
+        readonly |= (!prop->getContainer()->isDerivedFrom<App::DocumentObject>());
+    }
+    pe->setDisabled(readonly);
     return pe;
 }