+ PropertyLength inherits PropertyQuantity

src/App/PropertyUnits.cpp

@@ -125,7 +125,12 @@ TYPESYSTEM_SOURCE(App::PropertyAcceleration, App::PropertyFloat);
 // PropertyLength
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-TYPESYSTEM_SOURCE(App::PropertyLength, App::PropertyFloat);
+TYPESYSTEM_SOURCE(App::PropertyLength, App::PropertyQuantity);
+
+PropertyLength::PropertyLength()
+{
+    setUnit(Base::Unit::Length);
+}
 
 const char* PropertyLength::getEditorName(void) const
 { 

src/App/PropertyUnits.h

@@ -87,11 +87,11 @@ public:
  * This is a property for representing lengths. It is basically a float
  * property which must not be negative. On the Gui it has a quantity like m or mm.
  */
-class AppExport PropertyLength : public PropertyFloat
+class AppExport PropertyLength : public PropertyQuantity
 {
     TYPESYSTEM_HEADER();
 public:
-    PropertyLength(void){}
+    PropertyLength(void);
     virtual ~PropertyLength(){}
     virtual const char* getEditorName(void) const;