private static void UpdateContent(ViewGroup sender, object newContent, object[] args)
{
if (newContent == null && args == RemoveViewValue)
{
return;
}
//NOTE cheking if it's a view group listener.
if (args != null && args.Length == 2 && args[1] == AddViewValue)
{
return;
}
var templateId = sender.GetBindingMemberValue(AttachedMembers.ViewGroup.ContentTemplate);
var templateSelector = sender.GetBindingMemberValue(AttachedMembers.ViewGroup.ContentTemplateSelector);
newContent = PlatformExtensions.GetContentView(sender, sender.Context, newContent, templateId, templateSelector);
var contentViewManager = sender.GetBindingMemberValue(AttachedMembers.ViewGroup.ContentViewManager);
if (contentViewManager == null)
{
PlatformExtensions.SetContentView(sender, newContent);
}
else
{
contentViewManager.SetContent(sender, newContent);
}
}
private static void ViewGroupTemplateChanged <T>(ViewGroup sender, AttachedMemberChangedEventArgs <T> args)
{
var container = sender as AdapterView;
if (container == null)
{
sender.GetBindingMemberValue(AttachedMembers.ViewGroup.ItemsSourceGenerator)?.Reset();
}
else
{
(GetAdapter(container) as BaseAdapter)?.NotifyDataSetChanged();
}
}
private static void ViewGroupItemsSourceChanged(ViewGroup sender, AttachedMemberChangedEventArgs <IEnumerable> args)
{
var container = sender as AdapterView;
if (container == null)
{
var sourceGenerator = sender.GetBindingMemberValue(AttachedMembers.ViewGroup.ItemsSourceGenerator);
if (sourceGenerator == null)
{
sourceGenerator = new ViewGroupItemsSourceGenerator(sender);
sender.SetBindingMemberValue(AttachedMembers.ViewGroup.ItemsSourceGenerator, sourceGenerator);
}
sourceGenerator.SetItemsSource(args.NewValue);
return;
}
var adapter = GetAdapter(container) as IItemsSourceAdapter;
if (adapter == null)
{
adapter = ItemsSourceAdapter.Factory(container, container.Context, DataContext.Empty);
SetAdapter(container, adapter);
}
adapter.ItemsSource = args.NewValue;
}
private static void ContentTemplateIdChanged(ViewGroup sender, AttachedMemberChangedEventArgs <int?> args)
{
UpdateContent(sender, sender.GetBindingMemberValue(AttachedMembers.ViewGroup.Content), args.Args);
}
