public EditableSet(IBindableCollection <TElement> originals, Action <TElement> editItemAction, Action <TElement> addItemAction, Action <TElement> deleteItemAction)
{
_originals = originals;
_deleteItemAction = deleteItemAction;
_addItemAction = addItemAction;
_editItemAction = editItemAction;
_inserted = new ObservableCollection <Editable <TElement> >();
_editableOriginals = _originals.AsBindable().Select(orig => new Editable <TElement>(orig));
_editableOriginals.Evaluate();
_undoItemChangesCommand = new DelegateCommand <Editable <TElement> >(
item => UndoItemChanges(item),
item => item.HasChanges
);
_deleteItemCommand = new DelegateCommand <Editable <TElement> >(
item => DeleteItem(item),
item => true
);
_undoChangesCommand = new DelegateCommand(
ignored => UndoChanges(),
ignored => true
);
_commitChangesCommand = new DelegateCommand(
ignored => CommitChanges(),
ignored => true
);
}