Gui: expose claimChildren to Python

src/Gui/ViewProviderPy.xml

@@ -85,6 +85,11 @@
 				<UserDocu>Set a transformation on the Inventor node</UserDocu>
 			</Documentation>
 		</Methode>
+        <Methode Name="claimChildren" Const="true">
+			<Documentation>
+				<UserDocu>Returns list of objects that are to be grouped in tree under this object.</UserDocu>
+			</Documentation>
+		</Methode>
 		<Attribute Name="Annotation" ReadOnly="false">
 			<Documentation>
 				<UserDocu>A pivy Separator to add a custom scene graph to this ViewProvider</UserDocu>

src/Gui/ViewProviderPyImp.cpp

@@ -44,6 +44,7 @@
 #include <Base/MatrixPy.h>
 #include <Base/Placement.h>
 #include <Base/PlacementPy.h>
+#include <App/DocumentObject.h>
 
 using namespace Gui;
 
@@ -245,6 +246,22 @@ PyObject*  ViewProviderPy::setTransformation(PyObject *args)
     return 0;
 }
 
+PyObject* ViewProviderPy::claimChildren(PyObject* args)
+{
+    if (!PyArg_ParseTuple(args, ""))
+        return NULL;                     // NULL triggers exception
+
+    std::vector<App::DocumentObject*> children = this->getViewProviderPtr()->claimChildren();
+    Py::List ret;
+    for(App::DocumentObject* child: children){
+        if (child)
+            ret.append(Py::asObject(child->getPyObject()));
+        else
+            ret.append(Py::None());
+    }
+    return Py::new_reference_to(ret);
+}
+
 PyObject *ViewProviderPy::getCustomAttributes(const char* attr) const
 {
     // search for dynamic property