From 1f5b1fe13a5ee7846ddc955d918ed6def02cdb3d Mon Sep 17 00:00:00 2001
From: "Frank A. Krueger" <fak@praeclarum.org>
Date: Mon, 12 Mar 2018 20:56:12 -0700
Subject: [PATCH] Stop using XAML for editor sample

---
 Samples/Samples.csproj           |   6 --
 Samples/XamlPreviewPage.xaml     |  22 -------
 Samples/XamlPreviewPage.xaml.cs  |  72 ---------------------
 Samples/XamlPreviewPageSample.cs | 105 ++++++++++++++++++++++++++++++-
 4 files changed, 103 insertions(+), 102 deletions(-)
 delete mode 100644 Samples/XamlPreviewPage.xaml
 delete mode 100644 Samples/XamlPreviewPage.xaml.cs

diff --git a/Samples/Samples.csproj b/Samples/Samples.csproj
index 98ffe10..effd0d6 100644
--- a/Samples/Samples.csproj
+++ b/Samples/Samples.csproj
@@ -32,9 +32,6 @@
     <Compile Update="DisplayAlertPage.xaml.cs">
       <DependentUpon>DisplayAlertPage.xaml</DependentUpon>
     </Compile>
-    <Compile Update="XamlPreviewPage.xaml.cs">
-      <DependentUpon>XamlPreviewPage.xaml</DependentUpon>
-    </Compile>
   </ItemGroup>
 	
   <ItemGroup>
@@ -56,9 +53,6 @@
     <EmbeddedResource Update="WeatherApp\WeatherPage.xaml">
       <Generator>MSBuild:Compile</Generator>
     </EmbeddedResource>
-    <EmbeddedResource Update="XamlPreviewPage.xaml">
-      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
-    </EmbeddedResource>
   </ItemGroup>
     
   <ItemGroup>
diff --git a/Samples/XamlPreviewPage.xaml b/Samples/XamlPreviewPage.xaml
deleted file mode 100644
index a96fa29..0000000
--- a/Samples/XamlPreviewPage.xaml
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="Samples.XamlPreviewPage">
-	<ContentPage.Content>
-        <Grid>
-            <Grid.RowDefinitions>
-                <RowDefinition Height="auto" />
-                <RowDefinition Height="*" />
-            </Grid.RowDefinitions>
-            <Grid.ColumnDefinitions>
-                <ColumnDefinition Width="*" />
-                <ColumnDefinition Width="*" />
-            </Grid.ColumnDefinitions>
-
-            <StackLayout Orientation="Vertical" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2">
-                <Label Text="Xamarin.Forms XAML Editor" FontSize="24" FontAttributes="Bold" Margin="8,8,8,0" />
-                <Label Text="Edit the XAML below to see a live preview on the right" Margin="8,0,8,8" />
-            </StackLayout>
-            <Editor x:Name="editor" FontFamily="monospace" FontSize="12" Grid.Row="1" Grid.Column="0" />
-            <ContentView x:Name="results" Grid.Row="1" Grid.Column="1" BackgroundColor="White" />
-        </Grid>
-	</ContentPage.Content>
-</ContentPage>
diff --git a/Samples/XamlPreviewPage.xaml.cs b/Samples/XamlPreviewPage.xaml.cs
deleted file mode 100644
index 21f9318..0000000
--- a/Samples/XamlPreviewPage.xaml.cs
+++ /dev/null
@@ -1,72 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using Xamarin.Forms;
-
-namespace Samples
-{
-    public partial class XamlPreviewPage : ContentPage
-    {
-        public XamlPreviewPage ()
-        {
-            InitializeComponent ();
-
-            editor.Text = @"<ContentView
-  xmlns=""http://xamarin.com/schemas/2014/forms""
-  xmlns:x=""http://schemas.microsoft.com/winfx/2009/xaml"">
-<Grid>
-  <Grid.RowDefinitions>
-    <RowDefinition Height=""*"" />
-    <RowDefinition Height=""*"" />
-  </Grid.RowDefinitions>
-  <Grid.ColumnDefinitions>
-    <ColumnDefinition Width=""*"" />
-    <ColumnDefinition Width=""*"" />
-  </Grid.ColumnDefinitions>
-  <StackLayout Grid.Row=""0"" Grid.Column=""0"">
-    <Label Text=""Top Left"" />
-    <Entry Placeholder=""I'm ready for some text"" />
-    <Button Text=""I'm a button, but I don't do anything"" />
-  </StackLayout>
-  <Label Text=""Top Right"" Grid.Row=""0"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#c5000b"" />
-  <Label Text=""Bottom Left"" Grid.Row=""1"" Grid.Column=""0"" TextColor=""Black"" BackgroundColor=""#ffd320"" />
-  <Label Text=""Bottom Right"" Grid.Row=""1"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#008000"" />
-</Grid>
-</ContentView>";
-            editor.TextChanged += (sender, e) => DisplayXaml ();
-            DisplayXaml ();
-        }
-
-        CancellationTokenSource lastCts = null;
-
-        public void DisplayXaml ()
-        {
-            try {
-                var cts = new CancellationTokenSource ();
-                var token = cts.Token;
-                lastCts?.Cancel ();
-                lastCts = cts;
-
-                var asm = typeof (Xamarin.Forms.Xaml.Internals.XamlTypeResolver).Assembly;
-                var xamlLoaderType = asm.GetType ("Xamarin.Forms.Xaml.XamlLoader");
-                var loadArgTypes = new[] { typeof (object), typeof (string) };
-                var loadMethod = xamlLoaderType.GetMethod ("Load", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public, null, System.Reflection.CallingConventions.Any, loadArgTypes, null);
-                var contentView = new ContentView ();
-                loadMethod.Invoke (null, new object[] { contentView, editor.Text });
-
-                if (!token.IsCancellationRequested) {
-                    results.Content = contentView;
-                }
-            }
-            catch (OperationCanceledException) {
-            }
-            catch (Exception ex) {
-                results.Content = new Label {
-                    TextColor = Color.DarkRed,
-                    FontSize = 12,
-                    Text = ex.ToString (),
-                };
-            }
-        }
-    }
-}
diff --git a/Samples/XamlPreviewPageSample.cs b/Samples/XamlPreviewPageSample.cs
index 0f38ff5..8f4bc2d 100644
--- a/Samples/XamlPreviewPageSample.cs
+++ b/Samples/XamlPreviewPageSample.cs
@@ -1,6 +1,7 @@
 using System;
-
+using System.Threading;
 using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
 
 namespace Samples
 {
@@ -10,8 +11,108 @@ namespace Samples
 
         public Ooui.Element CreateElement ()
         {
-            var page = new XamlPreviewPage ();
+            var page = new XamlEditorPage ();
             return page.GetOouiElement ();
         }
     }
+
+    public partial class XamlEditorPage : ContentPage
+    {
+        Editor editor;
+        ContentView results;
+
+        public XamlEditorPage ()
+        {
+            InitializeComponent ();
+
+            editor.Text = @"<ContentView
+  xmlns=""http://xamarin.com/schemas/2014/forms""
+  xmlns:x=""http://schemas.microsoft.com/winfx/2009/xaml"">
+<Grid>
+  <Grid.RowDefinitions>
+    <RowDefinition Height=""*"" />
+    <RowDefinition Height=""*"" />
+  </Grid.RowDefinitions>
+  <Grid.ColumnDefinitions>
+    <ColumnDefinition Width=""*"" />
+    <ColumnDefinition Width=""*"" />
+  </Grid.ColumnDefinitions>
+  <StackLayout Grid.Row=""0"" Grid.Column=""0"">
+    <Label Text=""Top Left"" />
+    <Entry Placeholder=""I'm ready for some text"" />
+    <Button Text=""I'm a button, but I don't do anything"" />
+  </StackLayout>
+  <Label Text=""Top Right"" Grid.Row=""0"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#c5000b"" />
+  <Label Text=""Bottom Left"" Grid.Row=""1"" Grid.Column=""0"" TextColor=""Black"" BackgroundColor=""#ffd320"" />
+  <Label Text=""Bottom Right"" Grid.Row=""1"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#008000"" />
+</Grid>
+</ContentView>";
+            editor.TextChanged += (sender, e) => DisplayXaml ();
+            DisplayXaml ();
+        }
+
+        void InitializeComponent ()
+        {
+            var grid = new Grid ();
+
+            grid.RowDefinitions.Add (new RowDefinition { Height = GridLength.Auto });
+            grid.RowDefinitions.Add (new RowDefinition { Height = GridLength.Star });
+            grid.ColumnDefinitions.Add (new ColumnDefinition { Width = GridLength.Star });
+            grid.ColumnDefinitions.Add (new ColumnDefinition { Width = GridLength.Star });
+
+            editor = new Editor {
+                FontSize = 12,
+                FontFamily = "monospace",
+            };
+            editor.SetValue (Grid.ColumnProperty, 0);
+            editor.SetValue (Grid.RowProperty, 1);
+
+            results = new ContentView ();
+            results.SetValue (Grid.ColumnProperty, 1);
+            results.SetValue (Grid.RowProperty, 1);
+
+            var title = new Label {
+                Text = "XAML Editor",
+                FontSize = 24,
+                FontAttributes = FontAttributes.Bold,
+                Margin = new Thickness (8),
+            };
+            title.SetValue (Grid.ColumnProperty, 0);
+            title.SetValue (Grid.RowProperty, 0);
+
+            grid.Children.Add (title);
+            grid.Children.Add (editor);
+            grid.Children.Add (results);
+
+            Content = grid;
+        }
+
+        CancellationTokenSource lastCts = null;
+
+        public void DisplayXaml ()
+        {
+            try {
+                var cts = new CancellationTokenSource ();
+                var token = cts.Token;
+                lastCts?.Cancel ();
+                lastCts = cts;
+
+                var contentView = new ContentView ();
+                contentView.LoadFromXaml (editor.Text);
+
+                if (!token.IsCancellationRequested) {
+                    results.Content = contentView;
+                }
+            }
+            catch (OperationCanceledException) {
+            }
+            catch (Exception ex) {
+                results.Content = new Label {
+                    TextColor = Color.DarkRed,
+                    FontSize = 12,
+                    Text = ex.ToString (),
+                };
+            }
+        }
+    }
 }