void AssociatedObject_DragEnter(object sender, DragEventArgs e)
{
e.Handled = true;
//initialize adorner manager with the adorner layer of the itemsControl
if (_insertAdornerManager != null)
{
return;
}
var s = sender as DataGrid;
if (s != null)
{
_insertAdornerManager = new ListBoxAdornerManager(AdornerLayer.GetAdornerLayer(s));
}
if (_dataType != null)
{
return;
}
//if the DataContext implements IDropable, record the data type that can be dropped
if (AssociatedObject.DataContext == null)
{
return;
}
if (AssociatedObject.DataContext as IDropable != null)
{
_dataType = ((IDropable)AssociatedObject.DataContext).DataType;
}
}
private void AtDragEnter(object sender, DragEventArgs e)
{
if (_dataType == null)
{
//if the DataContext implements IDropable, record the data type that can be dropped
if (AssociatedObject.DataContext != null)
{
if (AssociatedObject.DataContext as IDropable != null)
{
_dataType = ((IDropable)AssociatedObject.DataContext).DataType;
}
}
}
//initialize adorner manager with the adorner layer of the itemsControl
if (_insertAdornerManager == null)
{
_insertAdornerManager = new ListBoxAdornerManager(AdornerLayer.GetAdornerLayer((ItemsControl)sender));
}
e.Handled = true;
}