private void ItemsSourceOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
for (var i = 0; i < e.NewItems.Count; ++i)
{
var model = (IDataSourceViewModel)e.NewItems[i];
if (PassesFilter(model))
{
var sourceIndex = e.NewStartingIndex + i;
var filteredIndex = FindFilteredIndex(sourceIndex);
FilteredItemsSource.Insert(filteredIndex, model);
}
}
break;
case NotifyCollectionChangedAction.Remove:
foreach (IDataSourceViewModel model in e.OldItems)
{
FilteredItemsSource.Remove(model);
}
break;
case NotifyCollectionChangedAction.Reset:
FilteredItemsSource.Clear();
break;
default:
throw new NotImplementedException();
}
UpdateNoDataSourcesMessage();
}
private void OnStringFilterChanged(string oldValue, string newValue)
{
if (ItemsSource != null)
{
int sourceIndex = 0;
int filterIndex = 0;
foreach (IDataSourceViewModel model in ItemsSource)
{
bool passedOld = PassesFilter(model, oldValue);
bool passesNew = PassesFilter(model, newValue);
if (!passedOld)
{
if (passesNew)
{
FilteredItemsSource.Insert(filterIndex++, model);
}
}
else if (!passesNew)
{
FilteredItemsSource.RemoveAt(filterIndex);
}
else
{
++filterIndex;
}
++sourceIndex;
}
}
}
private void OnStringFilterChanged(string oldValue, string newValue)
{
if (ItemsSource != null)
{
var sourceIndex = 0;
var filterIndex = 0;
foreach (var model in ItemsSource)
{
var passedOld = PassesFilter(model, oldValue);
var passesNew = PassesFilter(model, newValue);
if (!passedOld)
{
if (passesNew)
{
FilteredItemsSource.Insert(filterIndex++, model);
}
}
else if (!passesNew)
{
FilteredItemsSource.RemoveAt(filterIndex);
}
else
{
++filterIndex;
}
++sourceIndex;
}
}
UpdateNoDataSourcesMessage();
}
private void ItemsSourceOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
for (int i = 0; i < e.NewItems.Count; ++i)
{
var model = (IDataSourceViewModel)e.NewItems[i];
if (PassesFilter(model))
{
int sourceIndex = e.NewStartingIndex + i;
int filteredIndex = FindFilteredIndex(sourceIndex);
FilteredItemsSource.Insert(filteredIndex, model);
}
}
break;
case NotifyCollectionChangedAction.Remove:
foreach (IDataSourceViewModel model in e.OldItems)
{
FilteredItemsSource.Remove(model);
}
break;
/*case NotifyCollectionChangedAction.Reset:
* foreach (IDataSourceViewModel model in _dataSourceCopy)
* {
* model.PropertyChanged -= DataSourceOnPropertyChanged;
* }
* _dataSourceCopy.Clear();
* FilteredItemsSource.Clear();
* break;*/
default:
throw new NotImplementedException();
}
}