nice features

BaseViewModel.cs

@@ -1,6 +1,10 @@
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.IO;
 using System.Runtime.CompilerServices;
+using System.Text.Json;
+using System.Windows;
+using Microsoft.Win32;
 using ModernWpfPlayground.Annotations;
 
 namespace ModernWpfPlayground
@@ -32,5 +36,26 @@ namespace ModernWpfPlayground
             PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
         }
 
+        public void SaveViewModel()
+        {
+            var contents = JsonSerializer.Serialize(_valueDict);
+            var saveFileDialog = new SaveFileDialog();
+            var result = saveFileDialog.ShowDialog(Application.Current.MainWindow?.Owner);
+            if (result == true)
+            {
+                File.WriteAllText(saveFileDialog.FileName, contents);
+            }
+        }
+
+        public void LoadViewModel(string path)
+        {
+            var contents = File.ReadAllText(path);
+            var obj = JsonSerializer.Deserialize<Dictionary<string, object>>(contents);
+            foreach (var (key, value) in obj)
+            {
+                _valueDict[key] = value;
+                OnPropertyChanged(key);
+            }
+        }
     }
 }

ContentDialogExample.xaml

@@ -3,15 +3,19 @@
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:ui="http://schemas.modernwpf.com/2019"
-    Title="Save your work?"
+    x:Name="LayoutRoot"
+    Title="Delete your work?"
     CloseButtonText="Cancel"
     DefaultButton="Close"
     IsShadowEnabled="True"
     PrimaryButtonText="Yes"
     SecondaryButtonText="No">
-    <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
+    <ui:SimpleStackPanel
+        HorizontalAlignment="Stretch"
+        VerticalAlignment="Stretch"
+        Spacing="10">
         <!--  Content body  -->
-        <TextBlock Text="Lorem ipsum dolor sit amet, adipisicing elit." TextWrapping="Wrap" />
+        <TextBlock Text="Delete message?" />
-        <CheckBox Content="Upload your content to the cloud." />
+        <TextBlock TextWrapping="Wrap"><Run Text="&quot;" /><Run Text="{Binding Message, ElementName=LayoutRoot}" /><Run Text="&quot;" /></TextBlock>
-    </StackPanel>
+    </ui:SimpleStackPanel>
 </ui:ContentDialog>

ContentDialogExample.xaml.cs

@@ -1,9 +1,18 @@
-using ModernWpf.Controls;
+using System.Windows;
 
 namespace ModernWpfPlayground
 {
-    public partial class ContentDialogExample : ContentDialog
+    public partial class ContentDialogExample
     {
+        public static readonly DependencyProperty MessageProperty = DependencyProperty.Register(
+            "Message", typeof(string), typeof(ContentDialogExample), new PropertyMetadata(default(string)));
+
+        public string Message
+        {
+            get => (string) GetValue(MessageProperty);
+            set => SetValue(MessageProperty, value);
+        }
+
         public ContentDialogExample()
         {
             InitializeComponent();

MainWindow.xaml

@@ -66,7 +66,7 @@
                     <MenuItem Header="New" />
                     <MenuItem Header="Open" />
                     <Separator />
-                    <MenuItem Header="Close" />
+                    <MenuItem Command="{Binding CloseCommand}" Header="Close" />
                 </MenuItem>
                 <MenuItem Header="Edit">
                     <MenuItem Header="Copy" />
@@ -119,7 +119,6 @@
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="40" />
                 <ColumnDefinition Width="Auto" />
-                <ColumnDefinition Width="4" />
                 <ColumnDefinition />
             </Grid.ColumnDefinitions>
             <Border
@@ -160,11 +159,7 @@
                     <TreeViewItem Header="Child3" />
                 </TreeViewItem>
             </TreeView>
-            <GridSplitter
+            <TabControl Grid.Column="2">
-                Grid.Column="2"
-                Width="4"
-                Background="Transparent" />
-            <TabControl Grid.Column="3">
                 <TabItem Header="Bolt">
                     <Grid>
                         <Grid.ColumnDefinitions>
@@ -190,13 +185,12 @@
                             Command="{Binding ShowDialogCommand}"
                             Label="Hello"
                             Symbol="x³"
-                            Value="World" />
+                            Value="{Binding WelcomeMessage}" />
                         <controls:PropertyPresenter2
                             Label="Hallo"
                             Symbol="x²"
                             Value="{Binding ValidationTest}" />
                         <controls:PropertyPresenter2 Label="Hello" Value="{Binding BooleanValue}" />
-
                         <controls:PropertyPresenter2 Label="Hello">
                             <Slider
                                 AutoToolTipPlacement="TopLeft"

RelayCommand.cs

@@ -25,10 +25,7 @@ namespace ModernWpfPlayground
             remove => CommandManager.RequerySuggested -= value;
         }
 
-        public bool CanExecute(object parameter)
+        public bool CanExecute(object parameter) => _canExecute?.Invoke(parameter) ?? true;
-        {
-            return _canExecute?.Invoke(parameter) ?? true;
-        }
 
         public void Execute(object parameter)
         {

WindowViewModel.cs

@@ -8,13 +8,15 @@ namespace ModernWpfPlayground
     {
         public WindowViewModel()
         {
-            ShowDialogCommand = new RelayCommand(async x => await ShowDialogAsync(x));
+            ShowDialogCommand = new RelayCommand(async x => await ShowDialogAsync());
+            CloseCommand = new RelayCommand(x => Application.Current.Shutdown());
         }
 
-        private async Task ShowDialogAsync(object obj)
+        private async Task ShowDialogAsync()
         {
-            var dialog = new ContentDialogExample();
+            var dialog = new ContentDialogExample {Message = WelcomeMessage};
-            await dialog.ShowAsync();
+            var result = await dialog.ShowAsync();
+            WelcomeMessage = result.ToString();
         }
 
         public bool BooleanValue
@@ -41,6 +43,14 @@ namespace ModernWpfPlayground
             set => SetProperty(value);
         }
 
-        public ICommand ShowDialogCommand { get; }
+        public RelayCommand ShowDialogCommand { get; }
+
+        public string WelcomeMessage
+        {
+            get => GetProperty("Shadow of the empire");
+            set => SetProperty(value);
+        }
+
+        public ICommand CloseCommand { get; }
     }
 }