From ade4e4d96a2b026807019efdc717ed28793b09ad Mon Sep 17 00:00:00 2001
From: Pieter Hijma <pieterhijma@users.noreply.github.com>
Date: Mon, 15 Sep 2025 15:07:32 +0200
Subject: [PATCH] Gui: Enable single click expand property editor

---
 src/Gui/propertyeditor/PropertyEditor.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/Gui/propertyeditor/PropertyEditor.cpp b/src/Gui/propertyeditor/PropertyEditor.cpp
index d601842b92..2ee9d7428b 100644
--- a/src/Gui/propertyeditor/PropertyEditor.cpp
+++ b/src/Gui/propertyeditor/PropertyEditor.cpp
@@ -76,7 +76,7 @@ PropertyEditor::PropertyEditor(QWidget* parent)
 
     setAlternatingRowColors(true);
     setRootIsDecorated(false);
-    setExpandsOnDoubleClick(true);
+    setExpandsOnDoubleClick(false);
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     QStyleOptionViewItem opt = PropertyEditor::viewOptions();
@@ -411,6 +411,18 @@ void PropertyEditor::openEditor(const QModelIndex& index)
 
 void PropertyEditor::onItemActivated(const QModelIndex& index)
 {
+    if (!index.isValid()) {
+        return;
+    }
+    if (auto* prop = static_cast<PropertyItem*>(index.internalPointer());
+        prop && prop->isSeparator()) {
+
+        // setExpanded() only works on column 0
+        QModelIndex idxFirstColum = propertyModel->index(index.row(), 0, index.parent());
+        setExpanded(idxFirstColum, !isExpanded(idxFirstColum));
+        return;
+    }
+
     if (index.column() != 1) {
         return;
     }