Add chapter 10 sample project

2026-06-20 12:23:09 +00:00 · 2023-08-13 13:40:04 -04:00
parent f9e4d407b9
commit 90f935f4b2
91 changed files with 4110 additions and 0 deletions
@@ -0,0 +1,51 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+using Microsoft.UI.Xaml.Navigation;
+
+using TemplateStudioSampleApp.Contracts.Services;
+using TemplateStudioSampleApp.Views;
+
+namespace TemplateStudioSampleApp.ViewModels;
+
+public partial class ShellViewModel : ObservableRecipient
+{
+    [ObservableProperty]
+    private bool isBackEnabled;
+
+    [ObservableProperty]
+    private object? selected;
+
+    public INavigationService NavigationService
+    {
+        get;
+    }
+
+    public INavigationViewService NavigationViewService
+    {
+        get;
+    }
+
+    public ShellViewModel(INavigationService navigationService, INavigationViewService navigationViewService)
+    {
+        NavigationService = navigationService;
+        NavigationService.Navigated += OnNavigated;
+        NavigationViewService = navigationViewService;
+    }
+
+    private void OnNavigated(object sender, NavigationEventArgs e)
+    {
+        IsBackEnabled = NavigationService.CanGoBack;
+
+        if (e.SourcePageType == typeof(SettingsPage))
+        {
+            Selected = NavigationViewService.SettingsItem;
+            return;
+        }
+
+        var selectedItem = NavigationViewService.GetSelectedItem(e.SourcePageType);
+        if (selectedItem != null)
+        {
+            Selected = selectedItem;
+        }
+    }
+}