void CustomGridDragAndDrop_DragOver(object sender, GridDragOverEventArgs e)
{
var result = VisualTreeHelper.HitTest(this.View, Mouse.GetPosition(View));
if (result != null && result.VisualHit != null)
{
var hitRow = LayoutTreeHelper.GetVisualParents(HitElement).Where(row => row is GroupGridRow || row is RowControl).FirstOrDefault() as FrameworkElement;
if (hitRow != null)
{
var rowData = hitRow.DataContext as RowData;
e.AllowDrop = Equals(rowData.Row.GetType(), e.DraggedRows[0].GetType());
e.Handled = true;
}
else
{
e.AllowDrop = false;
e.Handled = true;
}
}
}
private void GridPackedDragDropManager_OnDragOver(object sender, GridDragOverEventArgs e)
{
var manager = sender as GridDragDropManager;
if (manager == null)
{
return;
}
switch (_dragSource)
{
case Packing: if (!manager.AllowDrop)
{
manager.AllowDrop = true;
}
break;
default: if (manager.AllowDrop)
{
manager.AllowDrop = false;
}
break;
}
}
