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 CreateUndoTransaction(string transactionName)
{
if (!_disableUndo)
{
_disableUndo = true;
if (_undoTransaction == null)
{
_undoTransaction = new Dictionary <string, MathExpGroupUndo>();
}
if (!_undoTransaction.ContainsKey(transactionName))
{
_undoTransaction.Add(transactionName, new MathExpGroupUndo(this, (MathExpGroup)root.Export().Clone()));
}
else
{
_undoTransaction[transactionName] = new MathExpGroupUndo(this, (MathExpGroup)root.Export().Clone());
}
}
}
