The deprecated version of sp_item_invoke_bbox_full (which still uses NRRects) returns empty rectangles when calculating geometric bboxes of vertical or horizontal lines. A group of those lines will therefore also have an empty geometric bbox, which is wrong. We must use the new version of sp_item_invoke_bbox_full, which uses NR::Maybe<NR::Rects> instead.

(bzr r5204)

2 files changed, 11 insertions, 4 deletions

diff --git a/src/seltrans.cpp b/src/seltrans.cpp
index 490ff4644..5ab99e147 100644
--- a/src/seltrans.cpp
+++ b/src/seltrans.cpp
@@ -278,7 +278,11 @@ void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool sho
     _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
     _geometric_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
     _point = p;
-    _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * NR::scale(x, y);    
+    if (_geometric_bbox) {
+        _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * NR::scale(x, y);
+    } else {
+        _point_geom = p;
+    }    
 
     // Next, get all points to consider for snapping
     SnapManager const &m = _desktop->namedview->snap_manager;
diff --git a/src/sp-item-group.cpp b/src/sp-item-group.cpp
index 7969c1bc1..d0a1d9111 100644
--- a/src/sp-item-group.cpp
+++ b/src/sp-item-group.cpp
@@ -273,8 +273,6 @@ static gchar * sp_group_description (SPItem * item)
 static NR::Matrix
 sp_group_set_transform(SPItem *item, NR::Matrix const &xform)
 {
-    SPGroup *group = SP_GROUP(item);
-
     Inkscape::Selection *selection = sp_desktop_selection(inkscape_active_desktop());
     persp3d_split_perspectives_according_to_selection(selection);
 
@@ -684,16 +682,21 @@ void CGroup::onModified(guint flags) {
 }
 
 void CGroup::calculateBBox(NRRect *bbox, NR::Matrix const &transform, unsigned const flags) {
+    
+    NR::Maybe<NR::Rect> dummy_bbox = NR::Nothing();
+    
     GSList *l = _group->childList(false, SPObject::ActionBBox);
     while (l) {
         SPObject *o = SP_OBJECT (l->data);
         if (SP_IS_ITEM(o)) {
             SPItem *child = SP_ITEM(o);
             NR::Matrix const ct(child->transform * transform);
-            sp_item_invoke_bbox_full(child, bbox, ct, flags, FALSE);
+            sp_item_invoke_bbox_full(child, &dummy_bbox, ct, flags, FALSE);
         }        
         l = g_slist_remove (l, o);
     }
+    
+    *bbox = NRRect(dummy_bbox);
 }
 
 void CGroup::onPrint(SPPrintContext *ctx) {