From 17fdde66d94155fc62a034fa6658995bef6fd6e5 Mon Sep 17 00:00:00 2001
From: Jason Smith <jason.smith@xamarin.com>
Date: Tue, 22 Mar 2016 13:02:25 -0700
Subject: Initial import

---
 Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs | 183 +++++++++++++++++++++
 1 file changed, 183 insertions(+)
 create mode 100644 Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs

(limited to 'Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs')

diff --git a/Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs b/Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs
new file mode 100644
index 00000000..43796d92
--- /dev/null
+++ b/Xamarin.Forms.Platform.WP8/MasterDetailRenderer.cs
@@ -0,0 +1,183 @@
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Controls;
+using Microsoft.Phone.Controls;
+
+namespace Xamarin.Forms.Platform.WinPhone
+{
+	public class MasterDetailRenderer : VisualElementRenderer<MasterDetailPage, FrameworkElement>
+	{
+		readonly SlideTransition _inTransition = new SlideTransition { Mode = SlideTransitionMode.SlideUpFadeIn };
+		readonly SlideTransition _outTransition = new SlideTransition { Mode = SlideTransitionMode.SlideDownFadeOut };
+		readonly Border _popup = new Border();
+		IVisualElementRenderer _detailRenderer;
+		IVisualElementRenderer _masterRenderer;
+
+		ITransition _toggleTransition;
+
+		public MasterDetailRenderer()
+		{
+			AutoPackage = false;
+		}
+
+		public bool Visible { get; private set; }
+
+		protected override System.Windows.Size ArrangeOverride(System.Windows.Size finalSize)
+		{
+			UpdateSizes(finalSize.Width, finalSize.Height);
+			return base.ArrangeOverride(finalSize);
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<MasterDetailPage> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.OldElement != null)
+				e.OldElement.BackButtonPressed -= HandleBackButtonPressed;
+
+			if (e.NewElement != null)
+				e.NewElement.BackButtonPressed += HandleBackButtonPressed;
+
+			LoadDetail();
+			LoadMaster();
+
+			UpdateSizes(ActualWidth, ActualHeight);
+
+			Loaded += (sender, args) =>
+			{
+				if (Element.IsPresented)
+					Toggle();
+				Element.SendAppearing();
+			};
+			Unloaded += (sender, args) =>
+			{
+				Element.SendDisappearing();
+				if (Visible)
+				{
+					var platform = (Platform)Element.Platform;
+					Canvas container = platform.GetCanvas();
+
+					container.Children.Remove(_popup);
+				}
+			};
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == "Detail")
+			{
+				LoadDetail();
+				UpdateSizes(ActualWidth, ActualHeight);
+			}
+			else if (e.PropertyName == "Master")
+			{
+				LoadMaster();
+				UpdateSizes(ActualWidth, ActualHeight);
+			}
+			else if (e.PropertyName == MasterDetailPage.IsPresentedProperty.PropertyName)
+			{
+				if (Visible == Element.IsPresented)
+					return;
+				Toggle();
+			}
+		}
+
+		internal void Toggle()
+		{
+			var platform = Element.Platform as Platform;
+			Canvas container = platform.GetCanvas();
+
+			if (_toggleTransition != null)
+				return;
+
+			if (Visible)
+			{
+				_toggleTransition = _outTransition.GetTransition(_popup);
+				_toggleTransition.Begin();
+				_toggleTransition.Completed += (sender, args) =>
+				{
+					_toggleTransition.Stop();
+					container.Children.Remove(_popup);
+					_toggleTransition = null;
+				};
+			}
+			else
+			{
+				_popup.Child = _masterRenderer.ContainerElement;
+				container.Children.Add(_popup);
+
+				_toggleTransition = _inTransition.GetTransition(_popup);
+				_toggleTransition.Begin();
+
+				_toggleTransition.Completed += (sender, args) =>
+				{
+					_toggleTransition.Stop();
+					_toggleTransition = null;
+				};
+			}
+
+			Visible = !Visible;
+
+			((IElementController)Element).SetValueFromRenderer(MasterDetailPage.IsPresentedProperty, Visible);
+		}
+
+		void HandleBackButtonPressed(object sender, BackButtonPressedEventArgs e)
+		{
+			if (Visible)
+			{
+				Toggle();
+				e.Handled = true;
+			}
+		}
+
+		void LoadDetail()
+		{
+			if (_detailRenderer != null)
+				Children.Remove(_detailRenderer.ContainerElement);
+
+			Page detail = Element.Detail;
+			if (Platform.GetRenderer(detail) == null)
+				Platform.SetRenderer(detail, Platform.CreateRenderer(detail));
+
+			_detailRenderer = Platform.GetRenderer(detail);
+
+			Children.Clear();
+			if (_detailRenderer != null)
+				Children.Add(_detailRenderer.ContainerElement);
+		}
+
+		void LoadMaster()
+		{
+			if (_masterRenderer != null && _popup != null)
+				_popup.Child = null;
+
+			Page master = Element.Master;
+			if (Platform.GetRenderer(master) == null)
+				Platform.SetRenderer(master, Platform.CreateRenderer(master));
+
+			_masterRenderer = Platform.GetRenderer(master);
+			var control = _masterRenderer as Panel;
+			if (control != null && master.BackgroundColor == Color.Default)
+				control.Background = Color.Black.ToBrush();
+		}
+
+		void UpdateSizes(double width, double height)
+		{
+			if (width <= 0 || height <= 0)
+				return;
+
+			var platform = Element.Platform as Platform;
+			Size screenSize = platform.Size;
+			Element.MasterBounds = new Rectangle(0, 0, screenSize.Width - 20, screenSize.Height - 20);
+			Element.DetailBounds = new Rectangle(0, 0, width, height);
+
+			_popup.Width = width - 20;
+			_popup.Height = height - 20;
+
+			Canvas.SetLeft(_popup, 10);
+			Canvas.SetTop(_popup, 10);
+		}
+	}
+}
\ No newline at end of file
-- 
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