protected void SetDeleted(T item)
{
item.ValueChanged -= item_ValueChanged;
if (!IsInitialized || !Editable)
{
return;
}
EditedObject <T> editedObj = new EditedObject <T>()
{
DataObject = item,
OldState = item.DataState,
NewState = DataState.Deleted,
};
if (item.DataState == DataState.Created)
{
added.Remove(item);
}
else
{
if (item.DataState == DataState.Modified)
{
modified.Remove(item);
}
deleted.Add(item);
item.MarkDeleted();
}
AddTrack(editedObj);
OnListChanged(new ListChangedEventArgs <T>(ListChangedType.ItemDeleted, editedObj));
}
protected void AddTrack(EditedObject <T> editTrack)
{
if (editLevel < track.Count)
{
track.RemoveRange(editLevel, track.Count - editLevel);
}
track.Add(editTrack);
editLevel++;
}
EditedObject <T> Undo(bool suppressEvent)
{
isInitialized = false;
EditedObject <T> editTrack = track[--editLevel];
switch (editTrack.NewState)
{
case DataState.Modified:
editTrack.DataObject.GetType().GetProperty(editTrack.PropertyName).SetValue(editTrack.DataObject, editTrack.OldValue, null);
if (editTrack.OldState == DataState.None)
{
editTrack.DataObject.ResetState();
modified.Remove(editTrack.DataObject);
}
editTrack.DataObject.OnPropertyChanged(editTrack.PropertyName);
editTrack.DataObject.OnValueChanged(editTrack.PropertyName, editTrack.OldValue, editTrack.NewValue);
break;
case DataState.Deleted:
switch (editTrack.OldState)
{
case DataState.None:
editTrack.DataObject.ResetState();
deleted.Remove(editTrack.DataObject);
break;
case DataState.Created:
added.Add(editTrack.DataObject);
break;
case DataState.Modified:
modified.Add(editTrack.DataObject);
editTrack.DataObject.MarkModified();
deleted.Remove(editTrack.DataObject);
break;
}
list.Add(editTrack.DataObject);
editTrack.DataObject.ValueChanged += item_ValueChanged;
break;
case DataState.Created:
added.Remove(editTrack.DataObject);
list.Remove(editTrack.DataObject);
editTrack.DataObject.ValueChanged -= item_ValueChanged;
break;
}
isInitialized = true;
if (!suppressEvent)
{
OnListChanged(new ListChangedEventArgs <T>(ListChangedType.ItemUndo, editTrack));
}
return(editTrack);
}
protected void SetAdded(T item)
{
item.ValueChanged += item_ValueChanged;
if (!IsInitialized || !Editable)
{
return;
}
EditedObject <T> editedObj = new EditedObject <T>()
{
DataObject = item,
OldState = item.DataState,
NewState = DataState.Created
};
added.Add(item);
item.MarkCreated();
AddTrack(editedObj);
OnListChanged(new ListChangedEventArgs <T>(ListChangedType.ItemAdded, editedObj));
}
protected void SetModified(T obj, string propertyName, object oldValue, object newValue)
{
if (!IsInitialized || !Editable)
{
return;
}
EditedObject <T> editedObj = new EditedObject <T>()
{
DataObject = obj,
OldState = obj.DataState,
NewState = DataState.Modified,
OldValue = oldValue,
NewValue = newValue,
PropertyName = propertyName
};
if (obj.DataState == DataState.None)
{
modified.Add(obj);
obj.MarkModified();
}
AddTrack(editedObj);
OnListChanged(new ListChangedEventArgs <T>(ListChangedType.ItemModified, editedObj));
}
public ListChangedEventArgs(ListChangedType type, EditedObject <T> obj)
{
EditedObject = obj;
ListChangedType = type;
}