Allow inserting at the beginning of a body

src/Mod/PartDesign/App/Body.cpp

@@ -130,6 +130,8 @@ App::DocumentObject* Body::getPrevSolidFeature(App::DocumentObject *start, const
     std::vector<App::DocumentObject*> features = Model.getValues();
     if (features.empty()) return NULL;
     App::DocumentObject* st = (start == NULL ? Tip.getValue() : start);
+    if (st == NULL)
+        return st; // Tip is NULL
 
     if (inclusive && isSolidFeature(st))
         return st;
@@ -156,7 +158,11 @@ App::DocumentObject* Body::getNextSolidFeature(App::DocumentObject *start, const
     if (inclusive && isSolidFeature(st))
             return st;
 
-    std::vector<App::DocumentObject*>::iterator it = std::find(features.begin(), features.end(), st);
+    std::vector<App::DocumentObject*>::iterator it;
+    if (st == NULL)
+        it = features.begin(); // Tip is NULL
+    else
+        it = std::find(features.begin(), features.end(), st);
     if (it == features.end()) return NULL; // Invalid start object
 
     // Skip sketches and datum features
@@ -170,9 +176,13 @@ App::DocumentObject* Body::getNextSolidFeature(App::DocumentObject *start, const
 }
 
 const bool Body::isAfterTip(const App::DocumentObject *f) {
+    App::DocumentObject* tipFeature = Tip.getValue();
+    if (tipFeature == NULL)
+        return true;
+
     std::vector<App::DocumentObject*> features = Model.getValues();
     std::vector<App::DocumentObject*>::const_iterator it = std::find(features.begin(), features.end(), f);
-    std::vector<App::DocumentObject*>::const_iterator tip = std::find(features.begin(), features.end(), Tip.getValue());
+    std::vector<App::DocumentObject*>::const_iterator tip = std::find(features.begin(), features.end(), tipFeature);
     return (it > tip);
 }
 
@@ -226,7 +236,8 @@ void Body::addFeature(App::DocumentObject *feature)
             // First feature in the body
             model.push_back(feature);
         else
-            throw Base::Exception("Body has features, but Tip is not valid");
+            // Insert feature as before all other features in the body
+            model.insert(model.begin(), feature);
     } else {
         // Insert after Tip
         std::vector<App::DocumentObject*>::iterator it = std::find(model.begin(), model.end(), tipFeature);
@@ -334,12 +345,14 @@ Base::BoundBox3d Body::getBoundBox()
 
     Part::Feature* tipSolid = static_cast<Part::Feature*>(getPrevSolidFeature());
     if (tipSolid != NULL) {
-        TopoDS_Shape sh = tipSolid->Shape.getValue();
+        if (tipSolid->Shape.getValue().IsNull())
-        if (sh.IsNull())
             // This can happen when a new feature is added without having its Shape property set yet
             tipSolid = static_cast<Part::Feature*>(getPrevSolidFeature(NULL, false));
 
         if (tipSolid != NULL) {
+            if (tipSolid->Shape.getValue().IsNull())
+                tipSolid = NULL;
+            else
                 result = tipSolid->Shape.getShape().getBoundBox();
         }
     }

src/Mod/PartDesign/Gui/Command.cpp

@@ -178,7 +178,10 @@ void CmdPartDesignMoveTip::activated(int iMsg)
     if (features.empty()) return;
     App::DocumentObject* selFeature = features.front();
 
-    if (!pcActiveBody->hasFeature(selFeature)) {
+    if (selFeature->getTypeId().isDerivedFrom(PartDesign::Body::getClassTypeId())) {
+        // Insert at the beginning of this body
+        selFeature = NULL;
+    } else if (!pcActiveBody->hasFeature(selFeature)) {
         // Switch to other body
         pcActiveBody = static_cast<PartDesign::Body*>(Part::BodyBase::findBodyOf(selFeature));
         if (pcActiveBody != NULL)
@@ -188,21 +191,27 @@ void CmdPartDesignMoveTip::activated(int iMsg)
             return;
     }
 
+    openCommand("Move insert point to selected feature");
     App::DocumentObject* oldTip = pcActiveBody->Tip.getValue();
+    if (oldTip != NULL) {
         if (!oldTip->getTypeId().isDerivedFrom(Part::Datum::getClassTypeId()))
             doCommand(Gui,"Gui.activeDocument().hide(\"%s\")", oldTip->getNameInDocument());
         App::DocumentObject* prevSolidFeature = pcActiveBody->getPrevSolidFeature();
         if (prevSolidFeature != NULL)
             doCommand(Gui,"Gui.activeDocument().hide(\"%s\")", prevSolidFeature->getNameInDocument());
+    }
 
-    openCommand("Move insert point to selected feature");
+    if (selFeature == NULL) {
+        doCommand(Doc,"App.activeDocument().%s.Tip = None", pcActiveBody->getNameInDocument());
+    } else {
         doCommand(Doc,"App.activeDocument().%s.Tip = App.activeDocument().%s",pcActiveBody->getNameInDocument(), selFeature->getNameInDocument());
 
         // Adjust visibility to show only the Tip feature and (if the Tip feature is not solid) the solid feature prior to the Tip
         doCommand(Gui,"Gui.activeDocument().show(\"%s\")", selFeature->getNameInDocument());
-    prevSolidFeature = pcActiveBody->getPrevSolidFeature();
+        App::DocumentObject* prevSolidFeature = pcActiveBody->getPrevSolidFeature();
         if ((prevSolidFeature != NULL) && !PartDesign::Body::isSolidFeature(selFeature))
             doCommand(Gui,"Gui.activeDocument().show(\"%s\")", prevSolidFeature->getNameInDocument());
+    }
 
     // TOOD: Hide all datum features after the Tip feature? But the user might have already hidden some and wants to see
     // others, so we would have to remember their state somehow

src/Mod/PartDesign/Gui/Workbench.cpp

@@ -276,7 +276,8 @@ void Workbench::setupContextMenu(const char* recipient, Gui::MenuItem* item) con
 {
     if (strcmp(recipient,"Tree") == 0)
     {
-        if (Gui::Selection().countObjectsOfType(PartDesign::Feature::getClassTypeId()) +
+        if (Gui::Selection().countObjectsOfType(PartDesign::Body::getClassTypeId()) +
+            Gui::Selection().countObjectsOfType(PartDesign::Feature::getClassTypeId()) +
             Gui::Selection().countObjectsOfType(Part::Datum::getClassTypeId()) +
             Gui::Selection().countObjectsOfType(Part::Part2DObject::getClassTypeId()) > 0 )
             *item << "PartDesign_MoveTip";