private static void OnListViewHeaderClick(object sender, RoutedEventArgs e)
{
var listView = e.Source as TreeList;
GridViewColumnHeader header = e.OriginalSource as GridViewColumnHeader;
SortInfo sortInfo = listView.GetValue(SortInfoProperty.DependencyProperty) as SortInfo;
if (sortInfo != null)
{
AdornerLayer.GetAdornerLayer(sortInfo.LastSortColumn).Remove(sortInfo.CurrentAdorner);
listView.Items.SortDescriptions.Clear();
}
else
{
sortInfo = new SortInfo();
}
if (sortInfo.CurrentAdorner == null)
{
return;
}
if (sortInfo.LastSortColumn == header)
{
(sortInfo.CurrentAdorner.Child as SortDecorator).SortDirection = (sortInfo.CurrentAdorner.Child as SortDecorator).SortDirection == ListSortDirection.Ascending ? ListSortDirection.Descending : ListSortDirection.Ascending;
}
else
{
sortInfo.CurrentAdorner = new UIElementAdorner_Sort(header, new SortDecorator());
}
sortInfo.LastSortColumn = header;
listView.SetValue(SortInfoProperty, sortInfo);
AdornerLayer.GetAdornerLayer(header).Add(sortInfo.CurrentAdorner);
SortDescription sortDescriptioin = new SortDescription()
{
Direction = (sortInfo.CurrentAdorner.Child as SortDecorator).SortDirection,
PropertyName = header.Column.GetValue(SortFieldProperty) as string ?? header.Column.Header as string
};
listView.Items.SortDescriptions.Add(sortDescriptioin);
}
internal static void SetSortInfo(DependencyObject obj, SortInfo value)
{
obj.SetValue(SortInfoProperty.DependencyProperty, value);
}