public void Duplicate()
{
if (SelectedStrokesIds.Count > 0)
{
Clipboard = new StrokeList(SelectedStrokes);
}
if (Clipboard == null)
{
return;
}
SelectionChanged?.Invoke(new StrokeList());
var copiedStrokes = new StrokeList();
var translationMatrix = Constants.DuplicationTransform;
var offset = 0;
foreach (var s in Clipboard.OrderBy(x => (x as StrokeModel)?.CreatedDate))
{
var strokeModel = new StrokeModel(s.Clone(), UserId);
strokeModel.CreatedDate = strokeModel.CreatedDate.AddMilliseconds(offset++);
strokeModel.Transform(translationMatrix, false);
copiedStrokes.Add(strokeModel);
}
Strokes.Add(new StrokeCollection(copiedStrokes));
SelectionChanged?.Invoke(copiedStrokes);
EditingMode = InkCanvasEditingMode.Select;
}
public void UpdateStroke(string id, StrokeModel stroke)
{
if (stroke != null)
{
stroke.AuthorId = AuthService.CurrentUser?.Id ?? AuthService.OfflineClientId;
stroke.LastModificationDate = DateTime.Now;
Logger.Debug($"Adding stroke ${id}");
if (IsOffline)
{
StrokesMap[id] = stroke;
}
}
else
{
Logger.Debug($"Removing stroke ${id}");
if (IsOffline)
{
StrokeModel _;
StrokesMap.TryRemove(id, out _);
}
}
StrokesToUpdate[id] = stroke;
StrokesMapOverride[id] = stroke;
if (IsOffline)
{
StrokesUpdated?.Invoke();
}
}
private bool IsSelectedByOtherUser(StrokeModel stroke)
{
string strokeOwnerId = null;
DrawingModel?.SelectedStrokes?.TryGetValue(stroke.Id, out strokeOwnerId);
return(strokeOwnerId != null && strokeOwnerId != UserId);
}
public void OnStrokesChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (IsRefreshingStrokes)
{
return;
}
lock (StrokesLock)
{
if (e.OldItems != null && e.OldItems.Count > 0)
{
foreach (Stroke s in e.OldItems)
{
var stroke = s as StrokeModel;
if (stroke == null)
{
continue;
}
StrokeCollection.UpdateStroke(stroke.Id, null);
}
}
if (e.NewItems != null && e.NewItems.Count > 0)
{
foreach (Stroke s in e.NewItems)
{
var stroke = s as StrokeModel;
if (stroke == null)
{
stroke = new StrokeModel(s, UserId);
}
else
{
stroke.Id = Guid.NewGuid().ToString();
}
StrokeCollection.UpdateStroke(stroke.Id, stroke);
}
}
// Erasing the last stroke is considered like a Reset action.
if (e.Action == NotifyCollectionChangedAction.Reset)
{
foreach (StrokeModel stroke in StrokeCollection.GetMergedStrokeMaps())
{
StrokeCollection.UpdateStroke(stroke.Id, null);
}
}
}
}
