/// <summary>
/// Create a list of AlphaGroup<T> with keys set by a SortedLocaleGrouping.
/// </summary>
/// <param name="slg">The sorted group headers for the specified locale</param>
/// <returns>The items source for a LongListSelector</returns>
private static List <AlphaKeyGroup <T> > CreateGroups(SortedLocaleGrouping slg)
{
List <AlphaKeyGroup <T> > list = new List <AlphaKeyGroup <T> >();
foreach (string key in slg.GroupDisplayNames)
{
if (key == "...")
{
list.Add(new AlphaKeyGroup <T>(GlobeGroupKey));
}
else
{
list.Add(new AlphaKeyGroup <T>(key));
}
}
return(list);
}
/// <summary>
/// Create a list of AlphaGroup<T> with keys set by a SortedLocaleGrouping.
/// </summary>
/// <param name="items">The items to place in the groups.</param>
/// <param name="ci">The CultureInfo to group and sort by.</param>
/// <param name="getKey">A delegate to get the key from an item.</param>
/// <param name="sort">Will sort the data if true.</param>
/// <returns>An items source for a LongListSelector</returns>
public static List <AlphaKeyGroup <T> > CreateGroups(IEnumerable <T> items, CultureInfo ci, GetKeyDelegate getKey, bool sort)
{
SortedLocaleGrouping slg = new SortedLocaleGrouping(ci);
List <AlphaKeyGroup <T> > list = CreateGroups(slg);
foreach (T item in items)
{
int index = slg.GetGroupIndex(getKey(item));
if (index >= 0 && index < list.Count)
{
list[index].Add(item);
}
}
if (sort)
{
foreach (AlphaKeyGroup <T> group in list)
{
group.Sort((c0, c1) => { return(ci.CompareInfo.Compare(getKey(c0), getKey(c1))); });
}
}
return(list);
}