private void dragEnter(object sender, DragEventArgs args)
{
if (args.Data.GetData(typeof(LibraryTreeNode)) is LibraryTreeNode)
{
LibraryTreeNode node = (LibraryTreeNode)args.Data.GetData(typeof(LibraryTreeNode));
FileDescriptor fDesc = FileManager.Instance.lookUp(node.FilePath);
if (fDesc != null && (fDesc is TypeDescriptor || fDesc.GetType().IsSubclassOf(typeof(TypeDescriptor))))
{
args.Effect = DragDropEffects.All;
}
if (fDesc != null && (fDesc is ArtDescriptor))
{
args.Effect = DragDropEffects.All;
}
}
}
