private void UpdateToolbarEnabling()
{
btnRefresh.Enabled = Selected != null;
btnDelete.Enabled = Selected != null && Selected.AllowDelete();
btnRename.Enabled = Selected != null && Selected.AllowRename();
btnCopy.Enabled = Selected != null && Selected.GetValidAppObjects().Any();
btnNew.Enabled = Root != null && Root.AllowNewChild();
DragDropBuilder bld = null;
if (Selected != null && ObjectClipboard.Memory != null)
{
bld = Selected.GetDragDropBuilder(ObjectClipboard.Memory);
}
ObjectClipboard.EnableAndFillPasteButton(bld, btnPaste);
}
