[Win] Will arrange native children of custom renderers (opt-in) (#322)

* Add repro for 42602

* [Win] Add option to arrange native children

* [Win] Don't allocate arrangedChildren unless required

1 files changed, 39 insertions, 0 deletions

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42602.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42602.cs
new file mode 100644
index 00000000..05e41013
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42602.cs
@@ -0,0 +1,39 @@
+using System;
+
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Controls
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Bugzilla, 42602, "[Win] Custom BoxView Renderer Does Not Render All Its Children Elements", PlatformAffected.WinRT)]
+	public class Bugzilla42602 : TestContentPage
+	{
+		AbsoluteLayout content;
+
+		protected override void Init()
+		{
+			//background white 800 x 600 square
+			content = new AbsoluteLayout()
+			{
+				BackgroundColor = Color.White,
+				WidthRequest = 800,
+				HeightRequest = 800,
+				VerticalOptions = LayoutOptions.CenterAndExpand,
+				HorizontalOptions = LayoutOptions.CenterAndExpand
+			};
+
+			//test TextBoxView 400 x 400, color gray, should have a red ellipse and a red "hello world"
+
+			var test = new TextBoxView() { WidthRequest = 300, HeightRequest = 300, BackgroundColor = Color.Blue };
+			content.Children.Add(test, new Point((content.WidthRequest - test.WidthRequest) / 2f, (content.HeightRequest - test.HeightRequest) / 2f));
+
+			Content = content;
+		}
+
+		public class TextBoxView : BoxView
+		{
+
+		}
+	}
+}