protected void NotifyCollectionChanged(object sender, NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> e)
{
NSThreadExtensions.ExecuteOnMainThread(() =>
{
IosDataSourceHandler.Handle(_tableViewRef.Target, e);
});
}
public void Handle(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> arg)
{
switch (arg.Action)
{
case NotifyCollectionChangedAction.Reset:
HandleGroupsReset();
break;
case NotifyCollectionChangedAction.Replace:
HandleGroupsReplace(arg);
break;
default:
if (BatchAction == null)
{
Update(arg);
}
else
{
BatchAction.Invoke(() => Update(arg));
}
break;
}
}
protected override void HandleGroupsRemove(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
foreach (var range in args.OldItemRanges)
{
Enumerable.Range(range.Index, range.OldItems.Count())
.Apply(RemoveSection);
}
}
public static void Handle <TKey, TItem>(
UITableView tableView,
NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
var handler = new IosTableObservableKeyGroupCollectionHandler <TKey, TItem>(tableView);
handler.Handle(args);
}
protected override void HandleGroupsRemove(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
foreach (var sectionsRange in args.OldItemRanges)
{
int sectionIndex = sectionsRange.Index;
foreach (var section in sectionsRange.OldItems)
{
_collectionViewRef.Target?.DeleteSections(NSIndexSet.FromIndex(sectionIndex));
sectionIndex++;
}
}
}
protected override void HandleGroupsAdd(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
foreach (var sectionsRange in args.NewItemRanges)
{
int sectionIndex = sectionsRange.Index;
foreach (var section in sectionsRange.NewItems)
{
_tableViewRef.Target?.InsertSections(NSIndexSet.FromIndex(sectionIndex), UITableViewRowAnimation.Automatic);
sectionIndex++;
}
}
}
public static void Handle <TKey, TItem>(
RecyclerView.Adapter adapter,
IEnumerable <IGrouping <TKey, TItem> > dataSource,
IList <FlatItem> flatMapping,
bool withSectionHeader,
bool withSectionFooter,
NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
var handler = new DroidRecyclerObservableKeyGroupCollectionHandler <TKey, TItem>(
adapter,
dataSource,
flatMapping,
withSectionHeader,
withSectionFooter);
handler.Handle(args);
}
private void Update(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
HandleGroupsAdd(e);
break;
case NotifyCollectionChangedAction.Remove:
HandleGroupsRemove(e);
break;
case NotifyCollectionChangedAction.Replace:
HandleGroupsReplace(e);
break;
}
if (e.GroupEvents != null)
{
foreach (var groupEvent in e.GroupEvents)
{
switch (groupEvent.Arg.Action)
{
case NotifyCollectionChangedAction.Add:
HandleItemsAdd(groupEvent.GroupIndex, groupEvent.Arg);
break;
case NotifyCollectionChangedAction.Remove:
HandleItemsRemove(groupEvent.GroupIndex, groupEvent.Arg);
break;
case NotifyCollectionChangedAction.Reset:
HandleItemsReset(groupEvent.GroupIndex);
break;
}
}
}
}
private void CatchEvents(object sender, NotifyKeyGroupCollectionChangedEventArgs <TKey, TValue> e)
{
_events.Add(e);
}
protected virtual void NotifyCollectionChanged(object sender, NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> e)
{
BuildPlainList();
NotifyOnMainThread();
}
protected abstract void HandleGroupsReplace(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args);
protected override void HandleGroupsReplace(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
_collectionViewRef.Target?.ReloadData();
}
protected override void HandleGroupsReplace(NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> args)
{
_recyclerViewAdapterRef.Target?.NotifyDataSetChanged();
}
