Ooui-tws-port/Ooui.Forms/Cells/ViewCellView.cs

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C#
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using Ooui.Forms.Renderers;
using System;
using Xamarin.Forms;
namespace Ooui.Forms.Cells
{
public class ViewCellView : CellView
{
private WeakReference<IVisualElementRenderer> _rendererRef;
private ViewCell _viewCell;
public ViewCell ViewCell
{
get { return _viewCell; }
set
{
if (_viewCell == value)
return;
UpdateCell(value);
}
}
private void UpdateCell(ViewCell cell)
{
if (_viewCell != null)
Device.BeginInvokeOnMainThread(_viewCell.SendDisappearing);
_viewCell = cell;
Device.BeginInvokeOnMainThread(_viewCell.SendAppearing);
IVisualElementRenderer renderer;
if (_rendererRef == null || !_rendererRef.TryGetTarget(out renderer))
renderer = GetNewRenderer();
else
{
if (renderer.Element != null && renderer == Platform.GetRenderer(renderer.Element))
renderer.Element.ClearValue(Platform.RendererProperty);
var type = Xamarin.Forms.Internals.Registrar.Registered.GetHandlerType(_viewCell.View.GetType());
var reflectableType = renderer as System.Reflection.IReflectableType;
var rendererType = reflectableType != null ? reflectableType.GetTypeInfo().AsType() : renderer.GetType();
if (rendererType == type || (renderer is DefaultRenderer && type == null))
renderer.SetElement(_viewCell.View);
else
{
renderer = GetNewRenderer();
}
}
Platform.SetRenderer(_viewCell.View, renderer);
}
private IVisualElementRenderer GetNewRenderer()
{
var newRenderer = Platform.CreateRenderer(_viewCell.View);
_rendererRef = new WeakReference<IVisualElementRenderer>(newRenderer);
AppendChild(newRenderer.NativeView);
return newRenderer;
}
}
}