From 9e4552e64f4f5200fc203bc915a26f86a300d2f2 Mon Sep 17 00:00:00 2001
From: punker76 <punkerat76@gmail.com>
Date: Sat, 2 Nov 2019 20:49:03 +0100
Subject: [PATCH] (GH-3661) Add a new OverlayBrush dependency property to
 SplitView

- Add new OverlayBrush dependency property that enables using an custom Overlay
---
 .../Controls/SplitView/SplitView.cs             | 17 +++++++++++++++++
 src/MahApps.Metro/Themes/SplitView.xaml         |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/MahApps.Metro/Controls/SplitView/SplitView.cs b/src/MahApps.Metro/Controls/SplitView/SplitView.cs
index db040ec13d..7461e94935 100644
--- a/src/MahApps.Metro/Controls/SplitView/SplitView.cs
+++ b/src/MahApps.Metro/Controls/SplitView/SplitView.cs
@@ -130,6 +130,23 @@ public bool IsPaneOpen
             set { this.SetValue(IsPaneOpenProperty, value); }
         }
 
+        /// <summary>
+        /// Identifies the <see cref="OverlayBrush"/> dependency property. 
+        /// </summary>
+        /// <returns>The identifier for the <see cref="OverlayBrush" /> dependency property.</returns>
+        public static readonly DependencyProperty OverlayBrushProperty =
+            DependencyProperty.Register("OverlayBrush", typeof(Brush), typeof(SplitView), new PropertyMetadata(Brushes.Transparent));
+
+        /// <summary>
+        /// Gets or sets a value that specifies the OverlayBrush 
+        /// </summary>
+        /// <returns>The current OverlayBrush</returns>
+        public Brush OverlayBrush
+        {
+            get { return (Brush)this.GetValue(OverlayBrushProperty); }
+            set { this.SetValue(OverlayBrushProperty, value); }
+        }
+
         /// <summary>
         ///     Identifies the <see cref="OpenPaneLength" /> dependency property.
         /// </summary>
diff --git a/src/MahApps.Metro/Themes/SplitView.xaml b/src/MahApps.Metro/Themes/SplitView.xaml
index 17cedbeb12..91f795b0fb 100644
--- a/src/MahApps.Metro/Themes/SplitView.xaml
+++ b/src/MahApps.Metro/Themes/SplitView.xaml
@@ -436,7 +436,7 @@
                                             Focusable="False"
                                             IsTabStop="False" />
                             <Rectangle x:Name="LightDismissLayer"
-                                       Fill="Transparent"
+                                       Fill="{TemplateBinding OverlayBrush}"
                                        Visibility="Collapsed" />
                         </Grid>