- add: menu

Nebula.Launcher/ViewModels/ViewModelBase.cs

@@ -1,8 +1,40 @@
-using Avalonia.Controls;
+using System;
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
 using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace Nebula.Launcher.ViewModels;
 
 public abstract class ViewModelBase : ObservableObject
 {
+    private readonly IServiceProvider _serviceProvider;
+    public ViewModelBase()
+    {
+        AssertDesignMode();
+        _serviceProvider = default!;
+    }
+    public ViewModelBase(IServiceProvider serviceProvider)
+    {
+        _serviceProvider = serviceProvider;
+    }
+
+    public bool TryGetViewModel(Type type,[NotNullWhen(true)] out ViewModelBase? viewModelBase)
+    {
+        viewModelBase = null;
+        var vm = Design.IsDesignMode
+            ? Activator.CreateInstance(type)
+            : _serviceProvider.GetService(type);
+        
+        Console.WriteLine(vm?.ToString());
+
+        if (vm is not ViewModelBase vmb) return false;
+
+        viewModelBase = vmb;
+        return true;
+    }
+
+    public void AssertDesignMode()
+    {
+        if (!Design.IsDesignMode) throw new Exception();
+    }
 }