public bool Remove(IViewModelCollection <T> item)
{
var result = _sources.Remove(item);
if (result)
{
Unwire(item);
}
return(result);
}
private void Wire(IViewModelCollection <T> item)
{
if (_isOrdered)
{
item.CollectionChanged += OnCollectionSortedChanged;
}
else
{
item.CollectionChanged += OnCollectionChanged;
}
item.PropertyChanged += OnPropertyChanged;
}
public void Add(IViewModelCollection <T> item)
{
_sources.Add(item);
if (_isOrdered)
{
InternalAddSortedRange(item);
}
else
{
_items.AddRange(item);
}
Wire(item);
}
public bool Contains(IViewModelCollection <T> item)
{
return(_sources.Contains(item));
}
private void Unwire(IViewModelCollection <T> item)
{
item.CollectionChanged -= OnCollectionChanged;
}
