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

2 files changed, 103 insertions, 64 deletions

diff --git a/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml b/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
index 61f6667e..4dcf4be5 100644
--- a/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
+++ b/Xamarin.Forms.Platform.WinRT.Phone/PhoneResources.xaml
@@ -242,7 +242,7 @@
         <Setter Property="HeaderTemplate">
             <Setter.Value>
                 <DataTemplate>
-                    <TextBlock Text="{Binding Title}" />
+                    <TextBlock Text="{Binding Title}" Foreground="{TemplateBinding ToolbarForeground}" />
                 </DataTemplate>
             </Setter.Value>
         </Setter>
@@ -281,7 +281,7 @@
                         </Grid>
                         <ScrollViewer x:Name="ScrollViewer" HorizontalSnapPointsAlignment="Center" HorizontalSnapPointsType="MandatorySingle" HorizontalScrollBarVisibility="Hidden" Margin="{TemplateBinding Padding}" Grid.Row="1" Template="{StaticResource ScrollViewerScrollBarlessTemplate}" VerticalSnapPointsType="None" VerticalScrollBarVisibility="Disabled" VerticalScrollMode="Disabled" VerticalContentAlignment="Stretch" ZoomMode="Disabled">
                             <PivotPanel x:Name="Panel" VerticalAlignment="Stretch">
-                                <PivotHeaderPanel x:Name="Header">
+                                <PivotHeaderPanel x:Name="Header" Background="{TemplateBinding ToolbarBackground}">
                                     <PivotHeaderPanel.RenderTransform>
                                         <CompositeTransform x:Name="HeaderTranslateTransform" TranslateX="0"/>
                                     </PivotHeaderPanel.RenderTransform>
diff --git a/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs b/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
index 9de3a623..a7337301 100644
--- a/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
+++ b/Xamarin.Forms.Platform.WinRT.Phone/TabbedPageRenderer.cs
@@ -8,14 +8,15 @@ using Windows.UI.Xaml.Media;
 
 namespace Xamarin.Forms.Platform.WinRT
 {
-	internal class TabbedPagePresenter :  Windows.UI.Xaml.Controls.ContentPresenter
+	internal class TabbedPagePresenter : Windows.UI.Xaml.Controls.ContentPresenter
 	{
-		public TabbedPagePresenter ()
+		public TabbedPagePresenter()
 		{
 			SizeChanged += (s, e) => {
-				if (ActualWidth > 0 && ActualHeight > 0) {
-					var tab = ((Page) DataContext);
-					((TabbedPage) tab.RealParent).ContainerArea = new Rectangle (0, 0, ActualWidth, ActualHeight);
+				if (ActualWidth > 0 && ActualHeight > 0)
+				{
+					var tab = ((Page)DataContext);
+					((TabbedPage)tab.RealParent).ContainerArea = new Rectangle(0, 0, ActualWidth, ActualHeight);
 				}
 			};
 		}
@@ -36,7 +37,7 @@ namespace Xamarin.Forms.Platform.WinRT
 			get { return Element; }
 		}
 
-		public Pivot Control
+		public FormsPivot Control
 		{
 			get;
 			private set;
@@ -48,31 +49,34 @@ namespace Xamarin.Forms.Platform.WinRT
 			private set;
 		}
 
-		public void SetElement (VisualElement element)
+		public void SetElement(VisualElement element)
 		{
 			if (element != null && !(element is TabbedPage))
-				throw new ArgumentException ("Element must be a TabbedPage", "element");
+				throw new ArgumentException("Element must be a TabbedPage", "element");
 
 			TabbedPage oldElement = Element;
-			Element = (TabbedPage) element;
+			Element = (TabbedPage)element;
 
-			if (oldElement != null) {
+			if (oldElement != null)
+			{
 				oldElement.PropertyChanged -= OnElementPropertyChanged;
-				((INotifyCollectionChanged) oldElement.Children).CollectionChanged -= OnPagesChanged;
+				((INotifyCollectionChanged)oldElement.Children).CollectionChanged -= OnPagesChanged;
 			}
 
-			if (element != null) {
-				if (Control == null) {
+			if (element != null)
+			{
+				if (Control == null)
+				{
 					Control = new FormsPivot {
-						Style = (Windows.UI.Xaml.Style) Windows.UI.Xaml.Application.Current.Resources["TabbedPageStyle"]
+						Style = (Windows.UI.Xaml.Style)Windows.UI.Xaml.Application.Current.Resources["TabbedPageStyle"]
 					};
 					Control.HeaderTemplate = (Windows.UI.Xaml.DataTemplate)Windows.UI.Xaml.Application.Current.Resources["TabbedPageHeader"];
 					Control.ItemTemplate = (Windows.UI.Xaml.DataTemplate)Windows.UI.Xaml.Application.Current.Resources["TabbedPage"];
 
 					Control.SelectionChanged += OnSelectionChanged;
 
-					Tracker = new BackgroundTracker<Pivot> (Windows.UI.Xaml.Controls.Control.BackgroundProperty) {
-						Element = (Page) element,
+					Tracker = new BackgroundTracker<Pivot>(Windows.UI.Xaml.Controls.Control.BackgroundProperty) {
+						Element = (Page)element,
 						Control = Control,
 						Container = Control
 					};
@@ -82,22 +86,24 @@ namespace Xamarin.Forms.Platform.WinRT
 				}
 
 				Control.DataContext = Element;
-				OnPagesChanged (Element.Children, new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Reset));
-				UpdateCurrentPage ();
-			
-				((INotifyCollectionChanged) Element.Children).CollectionChanged += OnPagesChanged;
+				OnPagesChanged(Element.Children, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+				UpdateCurrentPage();
+				UpdateBarTextColor();
+				UpdateBarBackgroundColor();
+
+				((INotifyCollectionChanged)Element.Children).CollectionChanged += OnPagesChanged;
 				element.PropertyChanged += OnElementPropertyChanged;
 
-				if (!string.IsNullOrEmpty (element.AutomationId))
-					Control.SetValue (AutomationProperties.AutomationIdProperty, element.AutomationId);
+				if (!string.IsNullOrEmpty(element.AutomationId))
+					Control.SetValue(AutomationProperties.AutomationIdProperty, element.AutomationId);
 			}
 
-			OnElementChanged (new VisualElementChangedEventArgs (oldElement, element));
+			OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
 		}
 
-		public SizeRequest GetDesiredSize (double widthConstraint, double heightConstraint)
+		public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
 		{
-			var constraint = new Windows.Foundation.Size (widthConstraint, heightConstraint);
+			var constraint = new Windows.Foundation.Size(widthConstraint, heightConstraint);
 
 			var oldWidth = Control.Width;
 			var oldHeight = Control.Height;
@@ -105,27 +111,27 @@ namespace Xamarin.Forms.Platform.WinRT
 			Control.Height = double.NaN;
 			Control.Width = double.NaN;
 
-			Control.Measure (constraint);
-			var result = new Size (Math.Ceiling (Control.DesiredSize.Width), Math.Ceiling (Control.DesiredSize.Height));
+			Control.Measure(constraint);
+			var result = new Size(Math.Ceiling(Control.DesiredSize.Width), Math.Ceiling(Control.DesiredSize.Height));
 
 			Control.Width = oldWidth;
 			Control.Height = oldHeight;
 
-			return new SizeRequest (result);
+			return new SizeRequest(result);
 		}
 
-		public void Dispose ()
+		public void Dispose()
 		{
-			Dispose (true);
+			Dispose(true);
 		}
 
-		protected virtual void Dispose (bool disposing)
+		protected virtual void Dispose(bool disposing)
 		{
 			if (!disposing || _disposed)
 				return;
 
 			_disposed = true;
-			SetElement (null);
+			SetElement(null);
 			Tracker = null;
 		}
 
@@ -140,8 +146,9 @@ namespace Xamarin.Forms.Platform.WinRT
 				if (_tracker == value)
 					return;
 
-				if (_tracker != null) {
-					_tracker.Dispose ();
+				if (_tracker != null)
+				{
+					_tracker.Dispose();
 					/*this.tracker.Updated -= OnTrackerUpdated;*/
 				}
 
@@ -151,8 +158,8 @@ namespace Xamarin.Forms.Platform.WinRT
 					this.tracker.Updated += OnTrackerUpdated;*/
 			}
 		}
-	
-		bool  ITitleProvider.ShowTitle
+
+		bool ITitleProvider.ShowTitle
 		{
 			get
 			{
@@ -164,12 +171,12 @@ namespace Xamarin.Forms.Platform.WinRT
 				if (_showTitle == value)
 					return;
 				_showTitle = value;
-				
+
 				(Control as FormsPivot).ToolbarVisibility = _showTitle ? Visibility.Visible : Visibility.Collapsed;
 			}
 		}
 
-		string  ITitleProvider.Title
+		string ITitleProvider.Title
 		{
 			get
 			{
@@ -199,86 +206,118 @@ namespace Xamarin.Forms.Platform.WinRT
 			}
 		}
 
-		protected virtual void OnElementChanged (VisualElementChangedEventArgs e)
+		protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
 		{
 			var changed = ElementChanged;
 			if (changed != null)
-				changed (this, e);
+				changed(this, e);
 		}
 
 		bool _disposed;
 		VisualElementTracker<Page, Pivot> _tracker;
 		bool _showTitle;
 
-		void OnPagesChanged (object sender, NotifyCollectionChangedEventArgs e)
+		void OnPagesChanged(object sender, NotifyCollectionChangedEventArgs e)
 		{
-			e.Apply (Element.Children, Control.Items);
+			e.Apply(Element.Children, Control.Items);
 
 			// Potential performance issue, UpdateLayout () is called for every page change
-			Control.UpdateLayout ();
+			Control.UpdateLayout();
 		}
 
-		void OnSelectionChanged (object sender, SelectionChangedEventArgs e)
+		void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
 		{
 			if (Element == null)
 				return;
 
-			Page page = (e.AddedItems.Count > 0) ? (Page) e.AddedItems[0] : null;
+			Page page = (e.AddedItems.Count > 0) ? (Page)e.AddedItems[0] : null;
 			Element.CurrentPage = page;
 		}
 
-		void OnElementPropertyChanged (object sender, PropertyChangedEventArgs e)
+		void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
 		{
-			if (e.PropertyName == "CurrentPage")
-				UpdateCurrentPage ();
+			if (e.PropertyName == nameof(TabbedPage.CurrentPage))
+				UpdateCurrentPage();
+			else if (e.PropertyName == TabbedPage.BarTextColorProperty.PropertyName)
+				UpdateBarTextColor();
+			else if (e.PropertyName == TabbedPage.BarBackgroundColorProperty.PropertyName)
+				UpdateBarBackgroundColor();
 		}
 
-		void UpdateCurrentPage ()
+		void UpdateCurrentPage()
 		{
 			Page page = Element.CurrentPage;
-			UpdateTitle (page);
+			UpdateTitle(page);
 
 			if (page == null)
 				return;
 			Control.SelectedItem = page;
 		}
 
-		void OnLoaded (object sender, RoutedEventArgs args)
+		void OnLoaded(object sender, RoutedEventArgs args)
 		{
 			if (Element == null)
 				return;
 
-			Element.SendAppearing ();
+			Element.SendAppearing();
 		}
 
-		void OnUnloaded (object sender, RoutedEventArgs args)
+		void OnUnloaded(object sender, RoutedEventArgs args)
 		{
 			if (Element == null)
 				return;
 
-			Element.SendDisappearing ();
+			Element.SendDisappearing();
+		}
+
+		void OnTrackerUpdated(object sender, EventArgs e)
+		{
+
+		}
+
+		Brush GetBarBackgroundBrush()
+		{
+			object defaultColor = Windows.UI.Xaml.Application.Current.Resources["AppBarBackgroundThemeBrush"];
+			if (Element.BarBackgroundColor.IsDefault && defaultColor != null)
+				return (Brush)defaultColor;
+			return Element.BarBackgroundColor.ToBrush();
+		}
+
+		Brush GetBarForegroundBrush()
+		{
+			object defaultColor = Windows.UI.Xaml.Application.Current.Resources["AppBarItemForegroundThemeBrush"];
+			if (Element.BarTextColor.IsDefault)
+				return (Brush)defaultColor;
+			return Element.BarTextColor.ToBrush();
 		}
 
-		void OnTrackerUpdated (object sender, EventArgs e)
+		void UpdateBarBackgroundColor()
 		{
+			Control.ToolbarBackground = GetBarBackgroundBrush();
+		}
 
+		void UpdateBarTextColor()
+		{
+			Control.ToolbarForeground = GetBarForegroundBrush();
 		}
 
-		void UpdateTitle (Page child)
+		void UpdateTitle(Page child)
 		{
-			Control.ClearValue (Pivot.TitleProperty);
+			Control.ClearValue(Pivot.TitleProperty);
 
 			if (child == null)
 				return;
-			var renderer = Platform.GetRenderer (child);
+			var renderer = Platform.GetRenderer(child);
 			var navigationRenderer = renderer as NavigationPageRenderer;
-			if (navigationRenderer != null) {
+			if (navigationRenderer != null)
+			{
 				Control.Title = navigationRenderer.Title;
-			} else {
-				((ITitleProvider) this).ShowTitle = false;
+			}
+			else {
+				((ITitleProvider)this).ShowTitle = false;
 			}
 
 		}
-	
+
 	}
 }
\ No newline at end of file