feat: remove EnumSelector in demo.

demo/Ursa.Demo/ViewModels/FormDemoViewModel.cs

@@ -1,12 +1,33 @@
 using System;
+using System.Collections.ObjectModel;
 using System.ComponentModel.DataAnnotations;
+using Avalonia.Layout;
 using CommunityToolkit.Mvvm.ComponentModel;
+using Ursa.Common;
 
 namespace Ursa.Demo.ViewModels;
 
-public partial class FormDemoViewModel: ObservableObject
+public partial class FormDemoViewModel : ObservableObject
 {
     [ObservableProperty] private DataModel _model;
+    [ObservableProperty] private Position _selectedPosition = Position.Top;
+    [ObservableProperty] private HorizontalAlignment _selectedHorizontalAlignment = HorizontalAlignment.Left;
+
+    public ObservableCollection<Position> Positions =>
+    [
+        Position.Left,
+        Position.Top,
+        Position.Right,
+        Position.Bottom,
+    ];
+
+    public ObservableCollection<HorizontalAlignment> HorizontalAlignments =>
+    [
+        HorizontalAlignment.Stretch,
+        HorizontalAlignment.Left,
+        HorizontalAlignment.Center,
+        HorizontalAlignment.Right,
+    ];
 
     public FormDemoViewModel()
     {
@@ -21,28 +42,30 @@ public partial class DataModel : ObservableObject
     [MinLength(10)]
     public string Name
     {
-        get=>_name;
+        get => _name;
         set => SetProperty(ref _name, value);
     }
 
     private double _number;
+
     [Range(0.0, 10.0)]
     public double Number
     {
         get => _number;
         set => SetProperty(ref _number, value);
     }
-    
+
     private string _email;
-    
+
     [EmailAddress]
     public string Email
     {
-        get=>_email;
+        get => _email;
         set => SetProperty(ref _email, value);
     }
 
     private DateTime _date;
+
     public DateTime Date
     {
         get => _date;