BarBackgroundColor and BarTextColor on TabbedPage (#96)

* [Core] Add properties to TabbedPage

* [Controls] Add properties to test page

* [iOS] Added BarBackgroundColor & BarTextColor to TabbedPage

* [A] Added BarBackgroundColor & BarTextColor to TabbedPage

* [UWP] Added BarBackgroundColor & BarTextColor to TabbedPage

* [WinRT] Format file

* [WinRT] Added BarBackgroundColor & BarTextColor to TabbedPage

* [Docs] Updated docs

3 files changed, 52 insertions, 3 deletions

diff --git a/Xamarin.Forms.Platform.WinRT.Tablet/TabbedPageRenderer.cs b/Xamarin.Forms.Platform.WinRT.Tablet/TabbedPageRenderer.cs
index 33923a49..f1df0813 100644
--- a/Xamarin.Forms.Platform.WinRT.Tablet/TabbedPageRenderer.cs
+++ b/Xamarin.Forms.Platform.WinRT.Tablet/TabbedPageRenderer.cs
@@ -3,6 +3,7 @@ using System.Collections.Specialized;
 using System.ComponentModel;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media;
 using Windows.UI.Xaml.Media.Animation;
 
 namespace Xamarin.Forms.Platform.WinRT
@@ -87,6 +88,8 @@ namespace Xamarin.Forms.Platform.WinRT
 
 				OnPagesChanged(Page.Children, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
 				UpdateCurrentPage();
+				UpdateBarTextColor();
+				UpdateBarBackgroundColor();
 
 				((INotifyCollectionChanged)Page.Children).CollectionChanged += OnPagesChanged;
 				element.PropertyChanged += OnElementPropertyChanged;
@@ -95,6 +98,22 @@ namespace Xamarin.Forms.Platform.WinRT
 			OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
 		}
 
+		Brush GetBarBackgroundBrush()
+		{
+			object defaultColor = Windows.UI.Xaml.Application.Current.Resources["ApplicationPageBackgroundThemeBrush"];
+			if (Page.BarBackgroundColor.IsDefault && defaultColor != null)
+				return (Brush)defaultColor;
+			return Page.BarBackgroundColor.ToBrush();
+		}
+
+		Brush GetBarForegroundBrush()
+		{
+			object defaultColor = Windows.UI.Xaml.Application.Current.Resources["ApplicationForegroundThemeBrush"];
+			if (Page.BarTextColor.IsDefault)
+				return (Brush)defaultColor;
+			return Page.BarTextColor.ToBrush();
+		}
+
 		public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
 		{
 			if (_canvas.Children.Count == 0)
@@ -153,8 +172,22 @@ namespace Xamarin.Forms.Platform.WinRT
 
 		void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
 		{
-			if (e.PropertyName == "CurrentPage")
+			if (e.PropertyName == nameof(TabbedPage.CurrentPage))
 				UpdateCurrentPage();
+			else if (e.PropertyName == TabbedPage.BarTextColorProperty.PropertyName)
+				UpdateBarTextColor();
+			else if (e.PropertyName == TabbedPage.BarBackgroundColorProperty.PropertyName)
+				UpdateBarBackgroundColor();
+		}
+
+		void UpdateBarBackgroundColor()
+		{
+			_tabs.Background = GetBarBackgroundBrush();
+		}
+
+		void UpdateBarTextColor()
+		{
+			_tabs.Foreground = GetBarForegroundBrush();
 		}
 
 		void UpdateCurrentPage()
diff --git a/Xamarin.Forms.Platform.WinRT.Tablet/TabletResources.xaml b/Xamarin.Forms.Platform.WinRT.Tablet/TabletResources.xaml
index 51b9e1d7..cfd51257 100644
--- a/Xamarin.Forms.Platform.WinRT.Tablet/TabletResources.xaml
+++ b/Xamarin.Forms.Platform.WinRT.Tablet/TabletResources.xaml
@@ -250,7 +250,7 @@
 		<Setter Property="ItemsPanel">
 			<Setter.Value>
 				<ItemsPanelTemplate>
-					<StackPanel Orientation="Horizontal" Margin="0,11,0,0" />
+					<StackPanel Orientation="Horizontal" Margin="0,11,0,0" Background="{TemplateBinding ToolbarBackground}" />
 				</ItemsPanelTemplate>
 			</Setter.Value>
 		</Setter>
@@ -261,7 +261,7 @@
 						<StackPanel VerticalAlignment="Bottom">
 							<Image DataContext="{Binding Icon, Converter={StaticResource ImageConverter}}" Source="{Binding Value}" HorizontalAlignment="Left" />
 							<TextBlock Margin="0,15,0,15" Text="{Binding Title, Converter={StaticResource UpperConverter}}"
-									   Style="{ThemeResource CaptionTextBlockStyle}" FontWeight="SemiBold" Foreground="{ThemeResource AppBarItemForegroundThemeBrush}" HorizontalAlignment="Left" />
+									   Style="{ThemeResource CaptionTextBlockStyle}" FontWeight="SemiBold" Foreground="{TemplateBinding ToolbarForeground}"  HorizontalAlignment="Left" />
 						</StackPanel>
 					</local:TabButton>
 				</DataTemplate>
diff --git a/Xamarin.Forms.Platform.WinRT.Tablet/TabsControl.cs b/Xamarin.Forms.Platform.WinRT.Tablet/TabsControl.cs
index d98a27a0..0848772c 100644
--- a/Xamarin.Forms.Platform.WinRT.Tablet/TabsControl.cs
+++ b/Xamarin.Forms.Platform.WinRT.Tablet/TabsControl.cs
@@ -1,6 +1,7 @@
 using System;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media;
 
 namespace Xamarin.Forms.Platform.WinRT
 {
@@ -46,5 +47,20 @@ namespace Xamarin.Forms.Platform.WinRT
 	public class TabsControl
 		: ItemsControl
 	{
+
+		public static readonly DependencyProperty ToolbarForegroundProperty = DependencyProperty.Register(nameof(ToolbarForeground), typeof(Brush), typeof(TabsControl), new PropertyMetadata(default(Brush)));
+		public static readonly DependencyProperty ToolbarBackgroundProperty = DependencyProperty.Register(nameof(ToolbarBackground), typeof(Brush), typeof(TabsControl), new PropertyMetadata(default(Brush)));
+
+		public Brush ToolbarBackground
+		{
+			get { return (Brush)GetValue(ToolbarBackgroundProperty); }
+			set { SetValue(ToolbarBackgroundProperty, value); }
+		}
+
+		public Brush ToolbarForeground
+		{
+			get { return (Brush)GetValue(ToolbarForegroundProperty); }
+			set { SetValue(ToolbarForegroundProperty, value); }
+		}
 	}
 }
\ No newline at end of file