private void DoUpdate(ISortedChangeSet <TObject, TKey> updates, IObservableCollection <TObject> list)
{
updates.ForEach(update =>
{
switch (update.Reason)
{
case ChangeReason.Add:
list.Insert(update.CurrentIndex, update.Current);
break;
case ChangeReason.Remove:
list.RemoveAt(update.CurrentIndex);
break;
case ChangeReason.Moved:
list.Move(update.PreviousIndex, update.CurrentIndex);
break;
case ChangeReason.Update:
{
list.RemoveAt(update.PreviousIndex);
list.Insert(update.CurrentIndex, update.Current);
}
break;
}
});
}
private void DoUpdate(ISortedChangeSet <TObject, TKey> updates, IObservableCollection <TObject> list)
{
foreach (var update in updates)
{
switch (update.Reason)
{
case ChangeReason.Add:
list.Insert(update.CurrentIndex, update.Current);
break;
case ChangeReason.Remove:
list.RemoveAt(update.CurrentIndex);
break;
case ChangeReason.Moved:
list.Move(update.PreviousIndex, update.CurrentIndex);
break;
case ChangeReason.Update:
if (update.PreviousIndex != update.CurrentIndex)
{
list.RemoveAt(update.PreviousIndex);
list.Insert(update.CurrentIndex, update.Current);
}
else
{
list.Replace(update.Previous.Value, update.Current);
}
break;
}
}
}
/// <summary>
/// in place sort an <see cref="IObservableCollection{T}"/> utilizing an <see cref="IComparer{T}"/>
/// </summary>
/// <remarks>
/// will undo selection, when collection is bound for example to a ListBox
/// </remarks>
public static void Sort <T>(this IObservableCollection <T> collection, IComparer <T> comparer)
{
var sorted = collection.OrderBy(x => x, comparer).ToList();
for (var i = 0; i < sorted.Count; i++)
{
collection.Move(collection.IndexOf(sorted[i]), i);
}
}
/// <summary>
/// Move o item de uma posição para outra.
/// </summary>
/// <param name="oldIndex">Indice antigo</param>
/// <param name="newIndex">Novo indice.</param>
public void Move(int oldIndex, int newIndex)
{
_source.Move(oldIndex, newIndex);
}
/// <summary>
/// Novo o item.
/// </summary>
/// <param name="oldIndex"></param>
/// <param name="newIndex"></param>
public void Move(int oldIndex, int newIndex)
{
_source.Move(_indexes[oldIndex], _indexes[newIndex]);
}