private void OnNoisyCollectionReset()
{
if (CollectionReset != null)
{
CollectionReset.Invoke();
}
}
/// <summary>
/// ステージされたデータをすべて破棄し、Itemsを再構築します。
/// 初期要素数はinitialSizeになります。
/// </summary>
/// <returns></returns>
public async Task ResetCollection()
{
if (_prevCancelToken != null)
{
_prevCancelToken.Cancel();
_prevCancelToken.Dispose();
}
try
{
_prevCancelToken = new CancellationTokenSource();
await UpdateProxyAsync(_prevCancelToken.Token);
}
catch (TaskCanceledException)
{
return;
}
_collectionChangedTrigger.OnNext(CollectionChanged <T> .Reset);
int i = 0;
foreach (var item in _proxy.Take(_initialSize).ToArray())
{
_collectionChangedTrigger.OnNext(CollectionChanged <T> .Add(i++, item));
}
CollectionReset?.Invoke(this, EventArgs.Empty);
_prevCancelToken.Dispose();
_prevCancelToken = null;
}
/// <summary>
/// Raises the <see cref="CollectionReset"/> event.
/// </summary>
protected virtual void OnCollectionReset()
{
CollectionReset?.Invoke(this);
if (suppressUntypedNotifications)
{
return;
}
untypedCollectionReset?.Invoke(this);
}
/// <summary>
/// Removes all the items from the collection, then notifies the change
/// </summary>
public void Clear()
{
var backup = _source.ToArray();
_source.Clear();
OnCollectionChanged(backup, null);
if (CollectionReset != null)
{
CollectionReset.Invoke();
}
}
/// <summary>
/// Removes all the items from the collection, then notifies the change
/// </summary>
public void Clear()
{
IList <T> backup;
lock (asynclock)
{
backup = _source.ToArray();
_source.Clear();
}
OnCollectionChanged(backup, null);
if (CollectionReset != null)
{
CollectionReset.Invoke();
}
}
/// <summary> /// Raises the <see cref="CollectionReset"/> event. /// </summary> private void OnCollectionReset() => CollectionReset?.Invoke(this);