delete features when deleting body

src/Gui/Tree.cpp

@@ -1278,6 +1278,8 @@ std::vector<DocumentObjectItem*> DocumentItem::getAllParents(DocumentObjectItem*
 
     for (std::vector<App::DocumentObject*>::iterator it = inlist.begin(); it != inlist.end(); ++it) {
         Gui::ViewProvider* vp = pDocument->getViewProvider(*it);
+        if(!vp) 
+            continue;
         std::vector<App::DocumentObject*> child = vp->claimChildren();
         for (std::vector<App::DocumentObject*>::iterator jt = child.begin(); jt != child.end(); ++jt) {
             if (*jt == obj) {

src/Mod/PartDesign/App/Body.cpp

@@ -43,6 +43,7 @@
 #include <Mod/Part/App/DatumFeature.h>
 #include <Mod/Part/App/PartFeature.h>
 
+#include <boost/bind.hpp>
 
 using namespace PartDesign;
 
@@ -419,4 +420,23 @@ PyObject *Body::getPyObject(void)
     return Py::new_reference_to(PythonObject);
 }
 
+void Body::onSettingDocument() {
+    
+    if(connection.connected())
+        connection.disconnect();
+    
+    getDocument()->signalDeletedObject.connect(boost::bind(&Body::onDelete, this, _1));
+    App::DocumentObject::onSettingDocument();
+}
+
+void Body::onDelete(const App::DocumentObject& obj) {
+    
+    if(&obj == this) {        
+        //delete all child objects if needed
+        std::vector<DocumentObject*> grp = Model.getValues();
+        for (auto obj : grp)             
+            this->getDocument()->remObject(obj->getNameInDocument(), true);
+    }
+}
+
 }

src/Mod/PartDesign/App/Body.h

@@ -27,6 +27,7 @@
 #include <App/PropertyStandard.h>
 #include <Mod/Part/App/BodyBase.h>
 
+#include <boost/signals.hpp>
 
 namespace PartDesign
 {
@@ -121,8 +122,13 @@ public:
 
     PyObject *getPyObject(void);
 
+protected:
+    virtual void onSettingDocument();
+    
 private:
     App::DocumentObject* rememberTip;
+    boost::signals::scoped_connection connection;
+    void onDelete(const App::DocumentObject& obj);
 };
 
 } //namespace PartDesign