public Task <DragDropEffects> DoDragDrop(PointerEventArgs triggerEvent, IDataObject data, DragDropEffects allowedEffects)
{
// Sanity check
var tl = FindRoot(triggerEvent.Source);
var view = tl?.PlatformImpl as WindowBaseImpl;
if (view == null)
{
throw new ArgumentException();
}
triggerEvent.Pointer.Capture(null);
var tcs = new TaskCompletionSource <DragDropEffects>();
var clipboardImpl = _factory.CreateDndClipboard();
using (var clipboard = new ClipboardImpl(clipboardImpl))
using (var cb = new DndCallback(tcs))
{
if (data.Contains(DataFormats.Text))
{
// API is synchronous, so it's OK
clipboard.SetTextAsync(data.GetText()).Wait();
}
view.BeginDraggingSession((AvnDragDropEffects)allowedEffects,
triggerEvent.GetPosition(tl).ToAvnPoint(), clipboardImpl, cb,
GCHandle.ToIntPtr(GCHandle.Alloc(data)));
}
return(tcs.Task);
}