public void CommitUndoTransaction(string transactionName)
{
if (_undoTransaction != null && _undoTransaction.ContainsKey(transactionName))
{
MathExpGroupUndo _currStates = _undoTransaction[transactionName];
MathExpGroupUndo objRedo = new MathExpGroupUndo(this, (MathExpGroup)root.Export().Clone());
UndoEntity undo = new UndoEntity(_currStates, objRedo);
_undoTransaction.Remove(transactionName);
_undoEngine.AddUndoEntity(undo);
enableUndo();
_disableUndo = false;
}
}
public void AddUndoEntity(UndoEntity entity)
{
if (!_disableUndo)
{
_undoEngine.AddUndoEntity(entity);
OnHasUndoChange();
}
}