Updated with OAPH on MainWindow and hard-wired view model

Author: Sam Storie

reactiveui-simple-user-control/SimpleApp/SimpleApp/MainWindow.xaml

@@ -6,7 +6,22 @@
         xmlns:local="clr-namespace:SimpleApp"
         mc:Ignorable="d"
         Title="MainWindow" Height="350" Width="525">
-    <Grid>
-        
+    <Grid Margin="8">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*"></RowDefinition>
+            <RowDefinition Height="*"></RowDefinition>
+        </Grid.RowDefinitions>
+
+        <DockPanel Grid.Row="0"  LastChildFill="True">
+            <TextBlock DockPanel.Dock="Top" HorizontalAlignment="Center">MainWindow Property</TextBlock>
+
+            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" x:Name="CurrentValue" FontSize="48"></TextBlock>
+        </DockPanel>
+
+        <DockPanel Grid.Row="1"  LastChildFill="True">
+            <TextBlock DockPanel.Dock="Top" HorizontalAlignment="Center">Embedded User Control</TextBlock>
+
+            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center">Nothing yet...</TextBlock>
+        </DockPanel>
     </Grid>
 </Window>

reactiveui-simple-user-control/SimpleApp/SimpleApp/MainWindow.xaml.cs

@@ -12,17 +12,33 @@
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
+using ReactiveUI;
 
 namespace SimpleApp
 {
     /// <summary>
     /// Interaction logic for MainWindow.xaml
     /// </summary>
-    public partial class MainWindow : Window
+    public partial class MainWindow : Window, IViewFor<MainWindowViewModel>
     {
         public MainWindow()
         {
+            ViewModel = new MainWindowViewModel();
             InitializeComponent();
+            DataContext = ViewModel;
+
+            this.WhenActivated(d =>
+            {
+                d(this.OneWayBind(ViewModel, vm => vm.CurrentValue, v => v.CurrentValue.Text));
+            });
         }
+
+        object IViewFor.ViewModel
+        {
+            get { return ViewModel; }
+            set { ViewModel = (MainWindowViewModel)value; }
+        }
+
+        public MainWindowViewModel ViewModel { get; set; }
     }
 }

reactiveui-simple-user-control/SimpleApp/SimpleApp/MainWindowViewModel.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ReactiveUI;
+
+namespace SimpleApp
+{
+    public class MainWindowViewModel : ReactiveObject
+    {
+        readonly ObservableAsPropertyHelper<long> _currentValue;
+        public long CurrentValue => _currentValue.Value;
+
+        public MainWindowViewModel()
+        {
+
+            Observable.Interval(TimeSpan.FromSeconds(1))
+                .ToProperty(this, x => x.CurrentValue, out _currentValue, 0, false, RxApp.MainThreadScheduler);
+        }
+    }
+}

reactiveui-simple-user-control/SimpleApp/SimpleApp/SimpleApp.csproj

@@ -89,6 +89,7 @@
     </Compile>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="MainWindowViewModel.cs" />
     <Compile Include="Properties\AssemblyInfo.cs">
       <SubType>Code</SubType>
     </Compile>