Make keyboard focus work again.

Perspex.Input/FocusManager.cs

@@ -7,6 +7,7 @@
 namespace Perspex.Input
 {
     using Perspex.Interactivity;
+    using Splat;
 
     public class FocusManager : IFocusManager
     {
@@ -33,6 +34,13 @@ namespace Perspex.Input
 
             this.Current = control;
 
+            IKeyboardDevice keyboard = Locator.Current.GetService<IKeyboardDevice>();
+
+            if (keyboard != null)
+            {
+                keyboard.FocusedElement = control;
+            }
+
             if (next != null)
             {
                 next.RaiseEvent(new RoutedEventArgs

Perspex.Input/IKeyboardDevice.cs

@@ -28,6 +28,8 @@ namespace Perspex.Input
 
     public interface IKeyboardDevice : IInputDevice
     {
+        IInputElement FocusedElement { get; set; }
+
         ModifierKeys Modifiers { get; }
     }
 }

Perspex.Input/KeyboardDevice.cs

@@ -35,7 +35,7 @@ namespace Perspex.Input
         public IInputElement FocusedElement
         {
             get;
-            protected set;
+            set;
         }
 
         public abstract ModifierKeys Modifiers { get; }
@@ -49,7 +49,7 @@ namespace Perspex.Input
                 switch (e.Type)
                 {
                     case RawKeyEventType.KeyDown:
-                        element.RaiseEvent(new KeyEventArgs
+                        KeyEventArgs ev = new KeyEventArgs
                         {
                             RoutedEvent = InputElement.PreviewKeyDownEvent,
                             Device = this,
@@ -57,16 +57,11 @@ namespace Perspex.Input
                             Text = e.Text,
                             Source = element,
                             OriginalSource = element,
-                        });
-                        element.RaiseEvent(new KeyEventArgs
-                        {
-                            RoutedEvent = InputElement.KeyDownEvent,
-                            Device = this,
-                            Key = e.Key,
-                            Text = e.Text,
-                            Source = element,
-                            OriginalSource = element,
-                        });
+                        };
+
+                        element.RaiseEvent(ev); ;
+                        ev.RoutedEvent = InputElement.KeyDownEvent;
+                        element.RaiseEvent(ev); ;
                         break;
                 }
             }

Perspex.Interactivity/Interactive.cs

@@ -59,7 +59,7 @@ namespace Perspex.Interactivity
         {
             Contract.Requires<NullReferenceException>(e != null);
 
-            if (e.RoutedEvent != null)
+            if (!e.Handled)
             {
                 switch (e.RoutedEvent.RoutingStrategy)
                 {

Perspex.Windows/WindowsPlatform.cs

@@ -8,8 +8,10 @@ namespace Perspex.Windows
 {
     using System;
     using System.Collections.Generic;
+    using Perspex.Input;
     using Perspex.Platform;
     using Perspex.Threading;
+    using Perspex.Windows.Input;
     using Perspex.Windows.Interop;
     using Perspex.Windows.Threading;
     using Splat;
@@ -24,6 +26,7 @@ namespace Perspex.Windows
         public static void Initialize()
         {
             var locator = Locator.CurrentMutable;
+            locator.Register(() => WindowsKeyboardDevice.Instance, typeof(IKeyboardDevice));
             locator.Register(() => instance, typeof(IPlatformThreadingInterface));
         }