void AssociatedObject_DragEnter(object sender, DragEventArgs e)
{
e.Effects = _effect = DragDropEffects.None;
Type dataType = GetDataType(e);
if (dataType != null)
{
//Debug.WriteLine("Timer START");
_openTimer.Start();
// can drop?
IDropable dropable = GetDropable();
_canDrop = dropable.CanDrop(GetData(e), this.AssociatedObject.DataContext, out _message);
_data = GetData(e);
_target = this.AssociatedObject.DataContext;
_uiElement = sender as UIElement;
if (_adorner == null)
{
MakeAdorner(_uiElement, _data, _target, false, _canDrop, _message);
}
// give mouse effect
if (_canDrop)
{
e.Effects = _effect = DragDropEffects.Move;
}
}
e.Handled = true;
}