private static void ComparerProperty_PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (!(d is CollectionViewSource source))
{
return;
}
if (e.OldValue == null)
{
ViewSort._viewDescriptor.AddValueChanged(source, ViewSort.Source_ViewChanged);
}
else if (e.NewValue == null)
{
ViewSort._viewDescriptor.RemoveValueChanged(source, ViewSort.Source_ViewChanged);
}
ViewSort.TrySetComparer(source, (IComparer?)e.NewValue);
}
private static void Source_ViewChanged(object sender, EventArgs e)
{
CollectionViewSource source = (CollectionViewSource)sender;
ViewSort.TrySetComparer(source, ViewSort.GetComparer(source));
}