From cc0e1a8f3a2b615120a3c454ef23d967eb9b3e52 Mon Sep 17 00:00:00 2001
From: donovaly <uwestoehr@lyx.org>
Date: Sun, 3 Nov 2019 23:54:12 +0100
Subject: [PATCH] DrawViewAnnotation: add transformation procedure for changed
 properties

---
 src/Mod/TechDraw/App/DrawViewAnnotation.cpp | 18 ++++++++++++++++++
 src/Mod/TechDraw/App/DrawViewAnnotation.h   |  1 +
 2 files changed, 19 insertions(+)

diff --git a/src/Mod/TechDraw/App/DrawViewAnnotation.cpp b/src/Mod/TechDraw/App/DrawViewAnnotation.cpp
index e5c80eef33..e166b71f8e 100644
--- a/src/Mod/TechDraw/App/DrawViewAnnotation.cpp
+++ b/src/Mod/TechDraw/App/DrawViewAnnotation.cpp
@@ -97,6 +97,24 @@ void DrawViewAnnotation::onChanged(const App::Property* prop)
     TechDraw::DrawView::onChanged(prop);
 }
 
+void DrawViewAnnotation::handleChangedPropertyType(Base::XMLReader &reader, const char *TypeName, App::Property *prop)
+// transforms properties that had been changed
+{
+	// property LineSpace had the App::PropertyInteger and was changed to App::PropertyPercent
+	if (prop == &LineSpace && strcmp(TypeName, "App::PropertyInteger") == 0) {
+		App::PropertyInteger LineSpaceProperty;
+		// restore the PropertyInteger to be able to set its value
+		LineSpaceProperty.Restore(reader);
+		LineSpace.setValue(LineSpaceProperty.getValue());
+	}
+	// property MaxWidth had the App::PropertyFloat and was changed to App::PropertyLength
+	else if (prop == &MaxWidth && strcmp(TypeName, "App::PropertyFloat") == 0) {
+		App::PropertyFloat MaxWidthProperty;
+		MaxWidthProperty.Restore(reader);
+		MaxWidth.setValue(MaxWidthProperty.getValue());
+	}
+}
+
 QRectF DrawViewAnnotation::getRect() const
 {
     QRectF result;
diff --git a/src/Mod/TechDraw/App/DrawViewAnnotation.h b/src/Mod/TechDraw/App/DrawViewAnnotation.h
index e3854e7509..102084a58e 100644
--- a/src/Mod/TechDraw/App/DrawViewAnnotation.h
+++ b/src/Mod/TechDraw/App/DrawViewAnnotation.h
@@ -70,6 +70,7 @@ public:
 
 protected:
     virtual void onChanged(const App::Property* prop);
+    void handleChangedPropertyType(Base::XMLReader &reader, const char *TypeName, App::Property * prop);
 
 private:
     static const char* TextStyleEnums[];