private static void SetGlyphForInitialSort(ListView listView)
{
if (!GetAutoSort(listView) || !GetShowSortGlyph(listView))
return;
var view = CollectionViewSource.GetDefaultView(listView.Items);
if (!view.SortDescriptions.Any())
return;
var headerRow = listView.FindDescendants<GridViewHeaderRowPresenter>().FirstOrDefault();
if (headerRow == null)
return;
var sort = view.SortDescriptions.First();
var headers = headerRow.FindDescendants<GridViewColumnHeader>();
foreach (var header in headers)
{
if (header.Column == null)
continue;
string sortPropertyName = GetSortPropertyName(header.Column);
if (sortPropertyName != sort.PropertyName)
continue;
AddSortGlyph(
header,
sort.Direction,
sort.Direction == ListSortDirection.Ascending ? GetSortGlyphAscending(listView) : GetSortGlyphDescending(listView));
SetSortedColumnHeader(listView, header);
break;
}
}
