App/Part: add getPartOfObject() to search a part for object

src/App/Part.cpp

@@ -66,6 +66,26 @@ Part::~Part(void)
 {
 }
 
+App::Part *Part::getPartOfObject (const DocumentObject* obj, bool indirect) {
+    const Document* doc = obj->getDocument();
+    std::vector<DocumentObject*> grps = doc->getObjectsOfType ( Part::getClassTypeId() );
+
+    for (auto partObj: grps) {
+        Part* part = static_cast <Part* >(partObj);
+        if ( indirect ) {
+            if ( part->geoHasObject (obj) ) {
+                return part;
+            }
+        } else {
+            if ( part->hasObject (obj) ) {
+                return part;
+            }
+        }
+    }
+
+    return 0;
+}
+
 
 PyObject *Part::getPyObject()
 {
@@ -73,7 +93,7 @@ PyObject *Part::getPyObject()
         // ref counter is set to 1
         PythonObject = Py::Object(new PartPy(this),true);
     }
-    return Py::new_reference_to(PythonObject); 
+    return Py::new_reference_to(PythonObject);
 }
 
 // Python feature ---------------------------------------------------------

src/App/Part.h

@@ -50,7 +50,7 @@ public:
     //@{
     /// Id e.g. Part number
     App::PropertyString  Id;
-    /// unique identifier of the Item 
+    /// unique identifier of the Item
     App::PropertyUUID    Uid;
     /// material descriptons
     App::PropertyMap     Material;
@@ -84,6 +84,15 @@ public:
         return "Gui::ViewProviderPart";
     }
 
+    /**
+     * Returns the part which contains this object.
+     * In case this object is not belongs to any Part 0 is returned.
+     * @param obj       the object to search for
+     * @param indirect  if true return if the part that so-called geoHas the object, @see geoHasObject()
+     *                  default is true
+     */
+    static App::Part* getPartOfObject (const DocumentObject* obj, bool indirect=true);
+
     virtual PyObject *getPyObject(void);
 };