private void Flush()
{
if (this.IsFlushPending)
{
this.IsFlushPending = false;
StopTimer();
var changePropertyRevertibleCommand = new ChangePropertyRevertibleCommand(_instance, _propertyInfo, LastUpdatedValue, OldValueToFlush, CommandDescription);
_undoRedoService.AddExecutedCommand(changePropertyRevertibleCommand);
}
}
private void CreateRevertibleCommandFromCollectionChange(NotifyCollectionChangedEventArgs notifyCollectionChangedEventArgs)
{
switch (notifyCollectionChangedEventArgs.Action)
{
case NotifyCollectionChangedAction.Add:
{
_undoRedoService.AddExecutedCommand(new RevertibleCommand(
() =>
{
var insertionIndex = notifyCollectionChangedEventArgs.NewStartingIndex;
foreach (var newItem in notifyCollectionChangedEventArgs.NewItems)
{
_objAsIList.Insert(insertionIndex++, newItem);
}
},
() =>
{
foreach (var newItem in notifyCollectionChangedEventArgs.NewItems)
{
_objAsIList.RemoveAt(notifyCollectionChangedEventArgs.NewStartingIndex);
}
}));
break;
}
case NotifyCollectionChangedAction.Move:
{
_undoRedoService.AddExecutedCommand(new RevertibleCommand(
() =>
{
var oldStartingIndex = notifyCollectionChangedEventArgs.OldStartingIndex;
foreach (var item in notifyCollectionChangedEventArgs.OldItems)
{
_objAsIList.RemoveAt(oldStartingIndex++);
}
var newStartingIndex = notifyCollectionChangedEventArgs.NewStartingIndex;
foreach (var item in notifyCollectionChangedEventArgs.NewItems)
{
_objAsIList.Insert(newStartingIndex++, item);
}
},
() =>
{
var newStartingIndex = notifyCollectionChangedEventArgs.NewStartingIndex;
foreach (var item in notifyCollectionChangedEventArgs.NewItems)
{
_objAsIList.RemoveAt(newStartingIndex++);
}
var oldStartingIndex = notifyCollectionChangedEventArgs.OldStartingIndex;
foreach (var item in notifyCollectionChangedEventArgs.OldItems)
{
_objAsIList.Insert(oldStartingIndex++, item);
}
}));
break;
}
case NotifyCollectionChangedAction.Remove:
{
_undoRedoService.AddExecutedCommand(new RevertibleCommand(
() =>
{
foreach (var removedItem in notifyCollectionChangedEventArgs.OldItems)
{
_objAsIList.RemoveAt(notifyCollectionChangedEventArgs.OldStartingIndex);
}
},
() =>
{
var insertionIndex = notifyCollectionChangedEventArgs.OldStartingIndex;
foreach (var removedItem in notifyCollectionChangedEventArgs.OldItems)
{
_objAsIList.Insert(insertionIndex++, removedItem);
}
}));
break;
}
case NotifyCollectionChangedAction.Replace:
{
_undoRedoService.AddExecutedCommand(new RevertibleCommand(
() =>
{
var index = notifyCollectionChangedEventArgs.NewStartingIndex;
foreach (var replacedItem in notifyCollectionChangedEventArgs.NewItems)
{
_objAsIList[index++] = replacedItem;
}
},
() =>
{
var index = notifyCollectionChangedEventArgs.OldStartingIndex;
foreach (var previousItem in notifyCollectionChangedEventArgs.OldItems)
{
_objAsIList[index++] = previousItem;
}
}));
break;
}
case NotifyCollectionChangedAction.Reset:
{
var removedItems = _recordedElementItems.Select((element) => element.OldValue).ToArray();
_undoRedoService.AddExecutedCommand(new RevertibleCommand(
() =>
{
_objAsIList.Clear();
},
() =>
{
foreach (var removedItem in removedItems)
{
_objAsIList.Add(removedItem);
}
}));
break;
}
default:
{
throw new Exception("unknown " + typeof(NotifyCollectionChangedAction).Name + " = " + notifyCollectionChangedEventArgs.Action);
}
}
}
