/// <summary>
/// Ends the transaction under which all undo/redo operations take place
/// </summary>
/// <param name="tran"></param>
public void EndTransaction(UndoTransaction tran)
{
if (_curTran == tran)
{
_curTran = null;
///now we might have had no items added to undo and redo stack as a part of this transaction. Check empty transaction at top and remove them
if (_undoStack.Count > 0)
{
UndoTransaction t = _undoStack[0] as UndoTransaction;
if (t != null && t.OperationsCount == 0)
{
_undoStack.Pop();
}
}
if (_redoStack.Count > 0)
{
UndoTransaction t = _redoStack[0] as UndoTransaction;
if (t != null && t.OperationsCount == 0)
{
_redoStack.Pop();
}
}
}
}
/// <summary>
/// Starts a transaction under which all undo redo operations take place
/// </summary>
/// <param name="tran"></param>
public void StartTransaction(UndoTransaction tran)
{
if (_curTran == null)
{
_curTran = tran;
///push an empty undo operation
_undoStack.Push(new UndoTransaction(tran.Name));
_redoStack.Push(new UndoTransaction(tran.Name));
}
}
