internal UIContainerCell(string cellId, View view, Shell shell, object context) : base(UITableViewCellStyle.Default, cellId)
{
View = view;
View.MeasureInvalidated += MeasureInvalidated;
SelectionStyle = UITableViewCellSelectionStyle.None;
_renderer = Platform.GetRenderer(view);
if (_renderer == null)
{
_renderer = Platform.CreateRenderer(view);
Platform.SetRenderer(view, _renderer);
}
ContentView.AddSubview(_renderer.NativeView);
_renderer.NativeView.ClipsToBounds = true;
ContentView.ClipsToBounds = true;
BindingContext = context;
if (shell != null)
{
shell.AddLogicalChild(View);
}
}
public void SetCustomContent(View content)
{
if (content == Content)
{
return;
}
removeScolledEvent?.Invoke();
removeScolledEvent = null;
if (Content != null)
{
var oldRenderer = Platform.GetRenderer(Content);
var oldContentView = ContentView;
var oldContent = Content;
Content = null;
ContentView = null;
oldContent.ClearValue(Platform.RendererProperty);
oldContentView?.RemoveFromSuperview();
oldRenderer?.Dispose();
}
// If the user hasn't defined custom content then only the ContentView is set
else if (ContentView != null)
{
var oldContentView = ContentView;
ContentView = null;
oldContentView.RemoveFromSuperview();
}
Content = content;
if (Content != null)
{
var renderer = Platform.CreateRenderer(Content);
ContentView = renderer.NativeView;
Platform.SetRenderer(Content, renderer);
ContentView.ClipsToBounds = true;
// not sure if there's a more efficient way to do this
// I can test the native control to see if it inherits from UIScrollView
// But the CollectionViewRenderer doesn't inherit from UIScrollView
if (Content is ScrollView sv)
{
sv.Scrolled += ScrollViewScrolled;
removeScolledEvent = () => sv.Scrolled -= ScrollViewScrolled;
void ScrollViewScrolled(object sender, ScrolledEventArgs e) =>
OnScrolled((nfloat)sv.ScrollY);
}
else if (Content is CollectionView cv)
{
cv.Scrolled += CollectionViewScrolled;
removeScolledEvent = () => cv.Scrolled -= CollectionViewScrolled;
void CollectionViewScrolled(object sender, ItemsViewScrolledEventArgs e) =>
OnScrolled((nfloat)e.VerticalOffset);
}
else if (Content is ListView lv)
{
lv.Scrolled += ListViewScrolled;
removeScolledEvent = () => lv.Scrolled -= ListViewScrolled;
void ListViewScrolled(object sender, ScrolledEventArgs e) =>
OnScrolled((nfloat)e.ScrollY);
}
}
}
