From 2e73258ab0dfb8b3b0930b278b0029503256a176 Mon Sep 17 00:00:00 2001
From: Vsevolod Kukol <sevoku@microsoft.com>
Date: Fri, 3 Mar 2017 21:52:40 +0100
Subject: [PATCH] Add WindowFrame.BackgroundColor property

---
 Xwt.Gtk/Xwt.GtkBackend/WindowBackend.cs | 13 +++++++++++++
 Xwt.WPF/Xwt.WPFBackend/WindowBackend.cs |  5 +++++
 Xwt.XamMac/Xwt.Mac/WindowBackend.cs     | 10 ++++++++++
 Xwt/Xwt.Backends/IWindowBackend.cs      |  2 ++
 Xwt/Xwt/Window.cs                       |  7 ++++++-
 5 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/Xwt.Gtk/Xwt.GtkBackend/WindowBackend.cs b/Xwt.Gtk/Xwt.GtkBackend/WindowBackend.cs
index cf8e1454d..e78915576 100755
--- a/Xwt.Gtk/Xwt.GtkBackend/WindowBackend.cs
+++ b/Xwt.Gtk/Xwt.GtkBackend/WindowBackend.cs
@@ -27,6 +27,7 @@
 
 using System;
 using Xwt.Backends;
+using Xwt.Drawing;
 
 namespace Xwt.GtkBackend
 {
@@ -121,6 +122,18 @@ public void GetConstraints (Gtk.Widget target, out SizeConstraint width, out Siz
 			width = RequestedSize.Width;
 			height = RequestedSize.Height;
 		}
+
+		Color? backgroundColor;
+
+		Color IWindowBackend.BackgroundColor {
+			get {
+				return backgroundColor ?? Window.GetBackgroundColor ();
+			}
+			set {
+				backgroundColor = value;
+				Window.SetBackgroundColor (value);
+			}
+		}
 	}
 
 	class RootWindowAlignment: Gtk.Alignment, IConstraintProvider
diff --git a/Xwt.WPF/Xwt.WPFBackend/WindowBackend.cs b/Xwt.WPF/Xwt.WPFBackend/WindowBackend.cs
index bc59f6ab7..c0e211621 100644
--- a/Xwt.WPF/Xwt.WPFBackend/WindowBackend.cs
+++ b/Xwt.WPF/Xwt.WPFBackend/WindowBackend.cs
@@ -188,6 +188,11 @@ protected override void OnResizeModeChanged ()
 		{
 			Window.ResetBorderSize ();
 		}
+
+		public Xwt.Drawing.Color BackgroundColor {
+			get { return Window.Background.ToXwtColor (); }
+			set { Window.Background = ResPool.GetSolidBrush (value); }
+		}
 	}
 
 	class WpfWindow : System.Windows.Window
diff --git a/Xwt.XamMac/Xwt.Mac/WindowBackend.cs b/Xwt.XamMac/Xwt.Mac/WindowBackend.cs
index d900cfd5b..2fc1bde8b 100644
--- a/Xwt.XamMac/Xwt.Mac/WindowBackend.cs
+++ b/Xwt.XamMac/Xwt.Mac/WindowBackend.cs
@@ -34,6 +34,7 @@
 using Foundation;
 using ObjCRuntime;
 using Xwt.Backends;
+using Xwt.Drawing;
 
 namespace Xwt.Mac
 {
@@ -133,6 +134,15 @@ public void Present ()
 			set { AlphaValue = (float)value; }
 		}
 
+		Color IWindowBackend.BackgroundColor {
+			get {
+				return BackgroundColor.ToXwtColor ();
+			}
+			set {
+				BackgroundColor = value.ToNSColor ();
+			}
+		}
+
 		public bool Sensitive {
 			get {
 				return sensitive;
diff --git a/Xwt/Xwt.Backends/IWindowBackend.cs b/Xwt/Xwt.Backends/IWindowBackend.cs
index 066404a6c..0d2a16a09 100755
--- a/Xwt/Xwt.Backends/IWindowBackend.cs
+++ b/Xwt/Xwt.Backends/IWindowBackend.cs
@@ -26,11 +26,13 @@
 
 using System;
 using Xwt;
+using Xwt.Drawing;
 
 namespace Xwt.Backends
 {
 	public interface IWindowBackend: IWindowFrameBackend, IChildPlacementHandler
 	{
+		Color BackgroundColor { get; set; }
 		void SetChild (IWidgetBackend child);
 		void SetMainMenu (IMenuBackend menu);
 		void SetPadding (double left, double top, double right, double bottom);
diff --git a/Xwt/Xwt/Window.cs b/Xwt/Xwt/Window.cs
index bb1dbbcee..048390fc0 100644
--- a/Xwt/Xwt/Window.cs
+++ b/Xwt/Xwt/Window.cs
@@ -26,7 +26,7 @@
 
 using System;
 using Xwt.Backends;
-
+using Xwt.Drawing;
 
 namespace Xwt
 {
@@ -61,6 +61,11 @@ public Window ()
 			set { initialLocation = value; }
 		}
 
+		public Color BackgroundColor {
+			get { return Backend.BackgroundColor; }
+			set { Backend.BackgroundColor = value; }
+		}
+
 		public WidgetSpacing Padding {
 			get { return padding; }
 			set {