private void SecurityProviderOnSecuritiesChanged(bool exclude, NotifyCollectionChangedAction action, IEnumerable <Security> securities)
{
if (!CheckAccess())
{
_prevFilter = null;
_prevType = null;
_isDirty = true;
return;
}
switch (action)
{
case NotifyCollectionChangedAction.Add:
{
if (exclude)
{
FilterSecurities();
}
else
{
FilteredSecurities.AddRange(securities.Where(CheckCondition));
}
break;
}
case NotifyCollectionChangedAction.Remove:
{
if (exclude)
{
FilterSecurities(true);
}
else
{
FilteredSecurities.RemoveRange(securities);
}
break;
}
case NotifyCollectionChangedAction.Reset:
{
if (exclude)
{
FilterSecurities();
}
else
{
FilteredSecurities.Clear();
}
break;
}
default:
throw new ArgumentOutOfRangeException(nameof(action));
}
UpdateCounter();
}
private void FilterSecurities(bool fullRefresh = false)
{
var filter = SecurityFilter;
if (filter != null)
{
filter = filter.Trim();
}
var secType = SelectedType;
// при уточняющем фильтре выполняем поиск в найденных инструментах
if (!fullRefresh &&
!_prevFilter.IsEmpty() && filter.StartsWith(_prevFilter, StringComparison.InvariantCultureIgnoreCase) &&
(_prevType == secType || _prevType == null && secType != null) &&
FilteredSecurities.Count < 500)
{
FilteredSecurities.RemoveWhere(s => !CheckCondition(s));
UpdateCounter();
return;
}
// LookupByCode не принимает пустой фильтр
if (filter.IsEmpty())
{
filter = "*";
}
var securities = SecurityProvider.LookupByCode(filter);
var toAdd = securities
.Where(s => !_excludeSecurities.Contains(s) && (secType == null || s.Type == secType))
.ToArray();
if (!FilteredSecurities.SequenceEqual(toAdd))
{
FilteredSecurities.Clear();
FilteredSecurities.AddRange(toAdd);
}
UpdateCounter();
}
