public void StartBatch()
{
if (_batch == null)
{
ClearRedoHistory();
_batch = new UndoManagerBatch();
}
}
public void StartBatch()
{
if (_batch != null)
{
return;
}
ClearRedoHistory();
_batch = new UndoManagerBatch();
}
public void CloseBatch()
{
if (_batch != null)
{
if (_batch.Count > 0)
{
_undoEvents.Push(_batch);
}
_batch = null;
}
}
/// <summary>
/// roll back everything in the currently open batch, not redoable
/// </summary>
public void UndoBatch()
{
_working = true;
try
{
_batch?.Undo();
}
finally
{
_working = false;
_batch = null;
}
}
public void CloseBatch()
{
if (_batch == null)
{
return;
}
if (_batch.Count > 0)
{
bool emptyBefore = !_undoEvents.Any();
_undoEvents.Push(_batch);
if (emptyBefore)
{
// no longer empty
NonEmpty?.Invoke(this, EventArgs.Empty);
}
}
_batch = null;
}
/// <summary>
/// roll back everything in the currently open batch, not redoable
/// </summary>
public void UndoBatch()
{
Working = true;
bool nonEmptyBefore = (_batch?.Count ?? 0) > 0 || _undoEvents.Any();
try
{
_batch?.Undo();
}
finally
{
bool nowEmpty = !_undoEvents.Any();
Working = false;
_batch = null;
if (nonEmptyBefore && nowEmpty)
{
Empty?.Invoke(this, EventArgs.Empty);
}
}
}
