func (p *port) AddNewObject(tree tr.TreeIf, cursor tr.Cursor, obj tr.TreeElementIf) (newCursor tr.Cursor, err error) { switch obj.(type) { case bh.ConnectionIf: conn := obj.(bh.ConnectionIf) var thisPort, otherPort bh.PortIf if p.Direction() == gr.InPort { otherPort = conn.From() thisPort = conn.To() } else { otherPort = conn.To() thisPort = conn.From() } if p != thisPort { log.Println("p =", p) log.Println("thisPort =", thisPort) log.Fatal("port.AddNewObject error: invalid connection ", conn) } sgt := thisPort.Node().Context() if sgt != otherPort.Node().Context() { log.Fatal("port.AddNewObject error: nodes have different context: ", conn) } contextCursor := tree.Parent(tree.Parent(cursor)) thisPort.AddConnection(conn) newCursor = p.treeAddNewObject(tree, cursor, conn, otherPort) context := tree.Object(contextCursor) switch context.(type) { case bh.SignalGraphIf: case bh.ImplementationIf: // propagate new edge to all instances of embracing type nt := tree.Object(tree.Parent(contextCursor)) for _, nn := range nt.(bh.NodeTypeIf).Instances() { nCursor := tree.Cursor(nn) tCursor := tree.CursorAt(nCursor, context) pCursor := tree.CursorAt(tCursor, p) pCursor.Position = cursor.Position p.treeAddNewObject(tree, pCursor, conn, otherPort) } default: log.Fatalf("port.AddNewObject error: wrong context type %T: %v\n", context, context) } default: log.Fatalf("port.AddNewObject error: invalid type %T: %v\n", obj, obj) } return }