private IPresenter EnsurePresenter(IPresenter presenter)
{
int index = _presenters.IndexOf(presenter);
if (index == -1)
{
_presenters.Add(presenter);
}
else
{
presenter = _presenters[index];
}
var node = presenter as IPresenterNode;
if (node != null)
{
node.Parent = this;
}
if (IsInitialized)
{
presenter.Initialize();
}
return(presenter);
}
/// <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);
}
}
public void ReplaceWithRange(T from, T to)
{
var iFrom = _allItems.IndexOf(from);
var iTo = _allItems.IndexOf(to);
if (iFrom < 0 || iTo < 0)
{
return; //normally unreachable code
}
if (iFrom > iTo)
{
var tmp = iFrom;
iFrom = iTo;
iTo = tmp;
}
_selectedItems.Replace(
_allItems.Skip(iFrom).Take(iTo - iFrom + 1));
}
/// <summary>
/// Método acionado quando a propriedade de uma dos itens da coleção for alterada.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ItemPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
if (_comparerPropertiesContainer != null && _comparerPropertiesContainer.ContainsProperty(e.PropertyName))
{
var item = (T)sender;
var sourceIndex = _source.IndexOf(item);
if (sourceIndex >= 0)
{
for (var i = 0; i < _indexes.Count; i++)
{
if (_indexes[i] == sourceIndex)
{
if ((i > 0 && _comparer.Compare(item, _source[_indexes[i - 1]]) < 0) || (i < _indexes.Count && _comparer.Compare(item, _source[_indexes[i + 1]]) > 0))
{
CalculateIndexes();
}
break;
}
}
}
}
}
