From f502ccf7489d22cf88fc3596666b462dde388a1a Mon Sep 17 00:00:00 2001
From: Lluis Sanchez Gual <lluis@xamarin.com>
Date: Sat, 29 Nov 2014 19:25:36 +0100
Subject: [PATCH] [Mac] Fix crash when checking if a widget has a native parent

---
 Xwt.Mac/Xwt.Mac/MacEngine.cs         | 6 +++++-
 Xwt/Xwt.Backends/XwtWidgetBackend.cs | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Xwt.Mac/Xwt.Mac/MacEngine.cs b/Xwt.Mac/Xwt.Mac/MacEngine.cs
index 5f62df0d..8ad82e6c 100644
--- a/Xwt.Mac/Xwt.Mac/MacEngine.cs
+++ b/Xwt.Mac/Xwt.Mac/MacEngine.cs
@@ -124,6 +124,7 @@ namespace Xwt.Mac
 			RegisterBackend <Xwt.Backends.IPasswordEntryBackend, PasswordEntryBackend> ();
 			RegisterBackend <Xwt.Backends.IWebViewBackend, WebViewBackend> ();
 			RegisterBackend <Xwt.Backends.ISaveFileDialogBackend, SaveFileDialogBackend> ();
+			RegisterBackend <Xwt.Backends.IColorPickerBackend, ColorPickerBackend> ();
 		}
 
 		public override void RunApplication ()
@@ -194,7 +195,10 @@ namespace Xwt.Mac
 
 		public override bool HasNativeParent (Widget w)
 		{
-			ViewBackend wb = (ViewBackend)Toolkit.GetBackend (w);
+			var b = (IWidgetBackend) Toolkit.GetBackend (w);
+			if (b is XwtWidgetBackend)
+				b = ((XwtWidgetBackend)b).NativeBackend;
+			ViewBackend wb = (ViewBackend)b;
 			return wb.Widget.Superview != null;
 		}
 		
diff --git a/Xwt/Xwt.Backends/XwtWidgetBackend.cs b/Xwt/Xwt.Backends/XwtWidgetBackend.cs
index 506c429e..6cb4c1a0 100644
--- a/Xwt/Xwt.Backends/XwtWidgetBackend.cs
+++ b/Xwt/Xwt.Backends/XwtWidgetBackend.cs
@@ -117,6 +117,10 @@ namespace Xwt.Backends
 				Font = new Xwt.Drawing.Font (value);
 			}
 		}
+
+		public IWidgetBackend NativeBackend {
+			get { return BackendHost.Backend; }
+		}
 		
 		object IWidgetBackend.NativeWidget {
 			get { return BackendHost.Backend.NativeWidget; }