protected override DragAndDropVisualMode HandleElementsDragAndDrop(DragAndDropArgs args, LayerTreeElement[] elements)
{
if (args.performDrop)
{
if (args.dragAndDropPosition == DragAndDropPosition.UponItem)
{
if (args.parentItem is TreeViewItem <LayerTreeElement> layerTreeItem)
{
ItemsDropped?.Invoke(elements, layerTreeItem.Data);
}
}
Reload();
return(DragAndDropVisualMode.None);
}
switch (args.dragAndDropPosition)
{
default: {
return(DragAndDropVisualMode.None);
}
case DragAndDropPosition.BetweenItems:
case DragAndDropPosition.OutsideItems: {
return(DragAndDropVisualMode.Rejected);
}
case DragAndDropPosition.UponItem: {
if (args.parentItem is TreeViewItem <LayerTreeElement> layerTreeItem)
{
return(layerTreeItem.Data.Type == LayerTreeViewElementType.Layer ? DragAndDropVisualMode.Link : DragAndDropVisualMode.Rejected);
}
return(DragAndDropVisualMode.Move);
}
}
}
private async void Row_Drop(object sender, DragEventArgs e)
{
var row = (Border)sender;
var fse = (FileSystemElement)row.Tag;
StyleHitbox(row, ROW_DEFAULT_STYLE_NAME);
if (fse.IsFolder && e.DataView.Contains(StandardDataFormats.StorageItems))
{
var items = await e.DataView.GetStorageItemsAsync();
ItemsDropped?.Invoke(fse, items);
//FileSystem.MoveStorageItemsAsync(fse, items.ToList());
}
}