Added in generic ViewModel

src/core/Microsoft.PowerToys.Settings.UI/Helpers/NavHelper.cs

@@ -0,0 +1,31 @@
+using System;
+
+using Microsoft.UI.Xaml.Controls;
+
+using Windows.UI.Xaml;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+    public class NavHelper
+    {
+        // This helper class allows to specify the page that will be shown when you click on a NavigationViewItem
+        //
+        // Usage in xaml:
+        // <winui:NavigationViewItem x:Uid="Shell_Main" Icon="Document" helpers:NavHelper.NavigateTo="views:MainPage" />
+        //
+        // Usage in code:
+        // NavHelper.SetNavigateTo(navigationViewItem, typeof(MainPage));
+        public static Type GetNavigateTo(NavigationViewItem item)
+        {
+            return (Type)item.GetValue(NavigateToProperty);
+        }
+
+        public static void SetNavigateTo(NavigationViewItem item, Type value)
+        {
+            item.SetValue(NavigateToProperty, value);
+        }
+
+        public static readonly DependencyProperty NavigateToProperty =
+            DependencyProperty.RegisterAttached("NavigateTo", typeof(Type), typeof(NavHelper), new PropertyMetadata(null));
+    }
+}

src/core/Microsoft.PowerToys.Settings.UI/Helpers/Observable.cs

@@ -0,0 +1,24 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+    public class Observable : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        protected void Set<T>(ref T storage, T value, [CallerMemberName]string propertyName = null)
+        {
+            if (Equals(storage, value))
+            {
+                return;
+            }
+
+            storage = value;
+            OnPropertyChanged(propertyName);
+        }
+
+        protected void OnPropertyChanged(string propertyName) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}

src/core/Microsoft.PowerToys.Settings.UI/Helpers/RelayCommand.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Windows.Input;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+    public class RelayCommand : ICommand
+    {
+        private readonly Action _execute;
+
+        private readonly Func<bool> _canExecute;
+
+        public event EventHandler CanExecuteChanged;
+
+        public RelayCommand(Action execute)
+            : this(execute, null)
+        {
+        }
+
+        public RelayCommand(Action execute, Func<bool> canExecute)
+        {
+            _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object parameter) => _canExecute == null || _canExecute();
+
+        public void Execute(object parameter) => _execute();
+
+        public void OnCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+    }
+
+    public class RelayCommand<T> : ICommand
+    {
+        private readonly Action<T> _execute;
+
+        private readonly Func<T, bool> _canExecute;
+
+        public event EventHandler CanExecuteChanged;
+
+        public RelayCommand(Action<T> execute)
+            : this(execute, null)
+        {
+        }
+
+        public RelayCommand(Action<T> execute, Func<T, bool> canExecute)
+        {
+            _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object parameter) => _canExecute == null || _canExecute((T)parameter);
+
+        public void Execute(object parameter) => _execute((T)parameter);
+
+        public void OnCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+    }
+}

src/core/Microsoft.PowerToys.Settings.UI/Helpers/ResourceExtensions.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Runtime.InteropServices;
+
+using Windows.ApplicationModel.Resources;
+
+namespace Microsoft.PowerToys.Settings.UI.Helpers
+{
+    internal static class ResourceExtensions
+    {
+        private static ResourceLoader _resLoader = new ResourceLoader();
+
+        public static string GetLocalized(this string resourceKey)
+        {
+            return _resLoader.GetString(resourceKey);
+        }
+    }
+}