From 13ed4bc6e8ec9be74be792f569a61b4affa49656 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 20 Feb 2021 13:33:54 +0100
Subject: [PATCH] PD: [skip ci] fixes #0004540: When manual size of DatumPlane
 is selected its Length property is not saved to the file and consequently not
 restored on opening

---
 src/Mod/PartDesign/App/DatumPlane.cpp | 9 +++++++++
 src/Mod/PartDesign/App/DatumPlane.h   | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/src/Mod/PartDesign/App/DatumPlane.cpp b/src/Mod/PartDesign/App/DatumPlane.cpp
index 0968ac1736..8e065ba834 100644
--- a/src/Mod/PartDesign/App/DatumPlane.cpp
+++ b/src/Mod/PartDesign/App/DatumPlane.cpp
@@ -78,6 +78,15 @@ Base::Vector3d Plane::getNormal()
     return normal;
 }
 
+void Plane::Restore(Base::XMLReader& reader)
+{
+    // set it to Manual to avoid to automatically adjust
+    // Length because it will be read before ResizeMode
+    // See bug #0004540
+    ResizeMode.setValue("Manual");
+    Datum::Restore(reader);
+}
+
 void Plane::onChanged(const App::Property *prop)
 {
     if (prop == &ResizeMode) {
diff --git a/src/Mod/PartDesign/App/DatumPlane.h b/src/Mod/PartDesign/App/DatumPlane.h
index d5781ea862..34ae349c29 100644
--- a/src/Mod/PartDesign/App/DatumPlane.h
+++ b/src/Mod/PartDesign/App/DatumPlane.h
@@ -50,6 +50,9 @@ public:
 
     Base::Vector3d getNormal();
 
+protected:
+    virtual void Restore(Base::XMLReader& reader);
+
 private:
     static const char* ResizeModeEnums[];
 };