[UWP] Respect TextBox BackgroundFocusBrush Effect (#928)

2 files changed, 37 insertions, 0 deletions

diff --git a/Xamarin.Forms.ControlGallery.WindowsUniversal/FocusEffect.cs b/Xamarin.Forms.ControlGallery.WindowsUniversal/FocusEffect.cs
new file mode 100644
index 00000000..0d4eba05
--- /dev/null
+++ b/Xamarin.Forms.ControlGallery.WindowsUniversal/FocusEffect.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Windows.UI;
+using Windows.UI.Xaml.Media;
+using Xamarin.Forms;
+using Xamarin.Forms.ControlGallery.WindowsUniversal;
+using Xamarin.Forms.Platform.UWP;
+
+[assembly: ResolutionGroupName("Xamarin")]
+[assembly: ExportEffect(typeof(FocusEffect), "FocusEffect")]
+namespace Xamarin.Forms.ControlGallery.WindowsUniversal
+{
+	public class FocusEffect : PlatformEffect
+	{
+		protected override void OnAttached()
+		{
+			try
+			{
+				(Control as Windows.UI.Xaml.Controls.Control).Background = new SolidColorBrush(Colors.Cyan);
+				(Control as FormsTextBox).BackgroundFocusBrush = new SolidColorBrush(Colors.White);
+			}
+			catch (Exception ex)
+			{
+				Debug.WriteLine("Cannot set property on attached control. Error: ", ex.Message);
+			}
+		}
+
+		protected override void OnDetached()
+		{
+		}
+	}
+}
\ No newline at end of file
diff --git a/Xamarin.Forms.ControlGallery.WindowsUniversal/Xamarin.Forms.ControlGallery.WindowsUniversal.csproj b/Xamarin.Forms.ControlGallery.WindowsUniversal/Xamarin.Forms.ControlGallery.WindowsUniversal.csproj
index bfb232e8..323d2fd8 100644
--- a/Xamarin.Forms.ControlGallery.WindowsUniversal/Xamarin.Forms.ControlGallery.WindowsUniversal.csproj
+++ b/Xamarin.Forms.ControlGallery.WindowsUniversal/Xamarin.Forms.ControlGallery.WindowsUniversal.csproj
@@ -169,6 +169,7 @@
     </Compile>
     <Compile Include="BrokenNativeControl.cs" />
     <Compile Include="CustomRenderers.cs" />
+    <Compile Include="FocusEffect.cs" />
     <Compile Include="MainPage.xaml.cs">
       <DependentUpon>MainPage.xaml</DependentUpon>
     </Compile>