1 files changed, 105 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WP8/TabbedPageRenderer.cs b/Xamarin.Forms.Platform.WP8/TabbedPageRenderer.cs
new file mode 100644
index 00000000..9192fc6f
--- /dev/null
+++ b/Xamarin.Forms.Platform.WP8/TabbedPageRenderer.cs
@@ -0,0 +1,105 @@
+using System;
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using Microsoft.Phone.Controls;
+
+namespace Xamarin.Forms.Platform.WinPhone
+{
+	public class TabbedPagePresenter : System.Windows.Controls.ContentPresenter
+	{
+		public override void OnApplyTemplate()
+		{
+			base.OnApplyTemplate();
+
+			DependencyObject parent = VisualTreeHelper.GetParent(this);
+			while (parent != null && !(parent is PivotItem))
+				parent = VisualTreeHelper.GetParent(parent);
+
+			var pivotItem = parent as PivotItem;
+			if (pivotItem == null)
+				throw new Exception("No parent PivotItem found for tab");
+
+			pivotItem.SizeChanged += (s, e) =>
+			{
+				if (pivotItem.ActualWidth > 0 && pivotItem.ActualHeight > 0)
+				{
+					var tab = (Page)DataContext;
+					((TabbedPage)tab.RealParent).ContainerArea = new Rectangle(0, 0, pivotItem.ActualWidth, pivotItem.ActualHeight);
+				}
+			};
+		}
+	}
+
+	public class TabbedPageRenderer : Pivot, IVisualElementRenderer
+	{
+		TabbedPage _page;
+		BackgroundTracker<Control> _tracker;
+
+		public TabbedPageRenderer()
+		{
+			SetBinding(TitleProperty, new System.Windows.Data.Binding("Title"));
+			SetBinding(ItemsSourceProperty, new System.Windows.Data.Binding("Children"));
+			HeaderTemplate = (System.Windows.DataTemplate)System.Windows.Application.Current.Resources["TabbedPageHeader"];
+			ItemTemplate = (System.Windows.DataTemplate)System.Windows.Application.Current.Resources["TabbedPage"];
+
+			SelectionChanged += OnSelectionChanged;
+		}
+
+		public UIElement ContainerElement
+		{
+			get { return this; }
+		}
+
+		public VisualElement Element
+		{
+			get { return _page; }
+		}
+
+		public event EventHandler<VisualElementChangedEventArgs> ElementChanged;
+
+		public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			return new SizeRequest(new Size(widthConstraint, heightConstraint));
+		}
+
+		public void SetElement(VisualElement element)
+		{
+			TabbedPage oldElement = _page;
+			_page = (TabbedPage)element;
+			_tracker = new BackgroundTracker<Control>(BackgroundProperty) { Model = _page, Element = this };
+
+			DataContext = element;
+
+			_page.PropertyChanged += OnPropertyChanged;
+
+			Loaded += (sender, args) => _page.SendAppearing();
+			Unloaded += (sender, args) => _page.SendDisappearing();
+
+			OnElementChanged(new VisualElementChangedEventArgs(_page, element));
+		}
+
+		protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
+		{
+			EventHandler<VisualElementChangedEventArgs> changed = ElementChanged;
+			if (changed != null)
+				changed(this, e);
+		}
+
+		void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			if (e.PropertyName == "CurrentPage")
+			{
+				Page current = _page.CurrentPage;
+				if (current != null)
+					SelectedItem = current;
+			}
+		}
+
+		void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
+		{
+			_page.CurrentPage = (Page)SelectedItem;
+		}
+	}
+}
+\ No newline at end of file