diff options
Diffstat (limited to 'Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs')
-rw-r--r-- | Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs b/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs new file mode 100644 index 00000000..9dfd12bb --- /dev/null +++ b/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs @@ -0,0 +1,56 @@ +using System; + +#if WINDOWS_UWP + +namespace Xamarin.Forms.Platform.UWP +#else + +namespace Xamarin.Forms.Platform.WinRT +#endif +{ + public static class VisualElementExtensions + { + public static IVisualElementRenderer GetOrCreateRenderer(this VisualElement self) + { + if (self == null) + throw new ArgumentNullException("self"); + + IVisualElementRenderer renderer = Platform.GetRenderer(self); + if (renderer == null) + { + renderer = RendererFactory.CreateRenderer(self); + Platform.SetRenderer(self, renderer); + } + + return renderer; + } + + internal static void Cleanup(this VisualElement self) + { + if (self == null) + throw new ArgumentNullException("self"); + + IVisualElementRenderer renderer = Platform.GetRenderer(self); + + foreach (Element element in self.Descendants()) + { + var visual = element as VisualElement; + if (visual == null) + continue; + + IVisualElementRenderer childRenderer = Platform.GetRenderer(visual); + if (childRenderer != null) + { + childRenderer.Dispose(); + Platform.SetRenderer(visual, null); + } + } + + if (renderer != null) + { + renderer.Dispose(); + Platform.SetRenderer(self, null); + } + } + } +}
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