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

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C#
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2018-04-26 23:55:23 +00:00
using Ooui.Forms.Renderers;
using System;
using Xamarin.Forms;
namespace Ooui.Forms.Cells
{
public class ViewCellElement : CellElement
{
WeakReference<IVisualElementRenderer> _rendererRef;
protected override void BindCell ()
{
var cell = (ViewCell)Cell;
IVisualElementRenderer renderer;
if (_rendererRef == null || !_rendererRef.TryGetTarget (out renderer))
renderer = GetNewRenderer (cell);
else {
if (renderer.Element != null && renderer == Platform.GetRenderer (renderer.Element))
renderer.Element.ClearValue (Platform.RendererProperty);
var type = Xamarin.Forms.Internals.Registrar.Registered.GetHandlerTypeForObject (cell.View);
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 (cell.View);
}
else {
renderer = GetNewRenderer (cell);
}
}
Platform.SetRenderer (cell.View, renderer);
base.BindCell ();
}
IVisualElementRenderer GetNewRenderer (ViewCell cell)
{
var newRenderer = Platform.CreateRenderer (cell.View);
_rendererRef = new WeakReference<IVisualElementRenderer> (newRenderer);
AppendChild (newRenderer.NativeView);
return newRenderer;
}
}
}