Preserve True/Projected state on save/restore

src/Mod/Measure/App/Measurement.cpp

@@ -80,12 +80,12 @@ void Measurement::clear()
     measureType = Invalid;
 }
 
-bool Measurement::hasReferences()
+bool Measurement::has3DReferences()
 {
     return (References3D.getSize() > 0);
 }
 
-/// Convenience Methods for adding points
+///add a 3D reference (obj+sub) to end of list
 int Measurement::addReference3D(App::DocumentObject *obj, const char* subName)
 {
   std::vector<App::DocumentObject*> objects = References3D.getValues();

src/Mod/Measure/App/Measurement.h

@@ -55,10 +55,10 @@ public:
     ~Measurement();
 
     void clear();
-    bool hasReferences();
+    bool has3DReferences();
 
     /// Add a reference
-    int addReference3D(App::DocumentObject *obj, const char *subName);
+    int addReference3D(App::DocumentObject* obj, const char *subName);
 
     MeasureType getType();
 

src/Mod/Measure/App/MeasurementPy.xml

@@ -19,6 +19,11 @@
         <UserDocu>add a geometric reference</UserDocu>
       </Documentation>
     </Methode>
+    <Methode Name="has3DReferences">
+      <Documentation>
+        <UserDocu>does Measurement have links to 3D geometry</UserDocu>
+      </Documentation>
+    </Methode>
     <Methode Name="clear">
       <Documentation>
         <UserDocu>measure the difference between references to obtain resultant vector</UserDocu>

src/Mod/Measure/App/MeasurementPyImp.cpp

@@ -84,6 +84,19 @@ PyObject* MeasurementPy::addReference3D(PyObject *args)
     Py_Return;
 }
 
+PyObject* MeasurementPy::has3DReferences(PyObject *args)
+{
+    PyObject *result=Py_False;
+    if (!PyArg_ParseTuple(args, ""))
+        return 0;
+
+    if (getMeasurementPtr()->has3DReferences()) {
+        result = Py_True;
+    }
+
+    return result;
+}
+
 PyObject* MeasurementPy::clear(PyObject *)
 {
     this->getMeasurementPtr()->clear();