添加Avalonia项目的demo

Serein.Workbench.Avalonia/App.axaml.cs

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+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Data.Core.Plugins;
+using Avalonia.Markup.Xaml;
+using Avalonia.Threading;
+using Microsoft.Extensions.DependencyInjection;
+using Serein.Library;
+using Serein.Library.Api;
+using Serein.Library.Utils;
+using Serein.NodeFlow;
+using Serein.NodeFlow.Env;
+using Serein.Workbench.Avalonia.Api;
+using Serein.Workbench.Avalonia.Custom.Node.ViewModels;
+using Serein.Workbench.Avalonia.Custom.Node.Views;
+using Serein.Workbench.Avalonia.Custom.ViewModels;
+using Serein.Workbench.Avalonia.Services;
+using Serein.Workbench.Avalonia.ViewModels;
+using Serein.Workbench.Avalonia.Views;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Avalonia;
+
+public static class ServiceCollectionExtensions
+{
+    /// <summary>
+    /// 注册ViewModel
+    /// </summary>
+    /// <param name="collection"></param>
+    public static void AddViewModelServices(this IServiceCollection collection)
+    {
+        collection.AddTransient<MainViewModel>(); // 主窗体
+        collection.AddTransient<MainMenuBarViewModel>(); // 主窗体菜单
+        collection.AddTransient<FlowLibrarysViewModel>(); // 依赖集合
+        collection.AddTransient<FlowLibraryMethodInfoViewModel>(); // 预览的方法信息
+        //collection.AddTransient<ParameterDetailsViewModel>(); // 节点参数信息
+        collection.AddTransient<NodeContainerViewModel>(); // 节点容器（画布）
+
+
+        collection.AddTransient<ActionNodeViewModel>(); // 节点容器（画布）
+
+
+        //collection.AddTransient<FlowLibraryInfoViewModel>(); // 依赖信息
+    }
+
+    public static void AddWorkbenchServices(this IServiceCollection collection)
+    {
+        collection.AddSingleton<IFlowEEForwardingService, FlowEEForwardingService>(); // 流程事件管理
+        collection.AddSingleton<IWorkbenchEventService, WorkbenchEventService>(); // 流程事件管理
+        collection.AddSingleton<INodeOperationService, NodeOperationService>(); // 节点操作管理
+        collection.AddSingleton<IKeyEventService, KeyEventService>(); // 按键事件管理
+        //collection.AddSingleton<FlowNodeControlService>(); // 流程节点控件管理
+    }
+
+
+    /// <summary>
+    /// 注册流程接口相关实例
+    /// </summary>
+    /// <param name="collection"></param>
+    public static void AddFlowServices(this IServiceCollection collection)
+    {
+        
+        #region 创建实例
+        Func<SynchronizationContext> getSyncContext = null;
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            var uiContext = SynchronizationContext.Current; // 在UI线程上获取UI线程上下文信息
+            if(uiContext is not null)
+            {
+                getSyncContext = () => uiContext;
+            }
+        });
+
+        UIContextOperation? uIContextOperation = null;
+        uIContextOperation = new UIContextOperation(getSyncContext); // 封装一个调用UI线程的工具类
+        FlowEnvironmentDecorator flowEnvironmentDecorator = new FlowEnvironmentDecorator(uIContextOperation);
+        collection.AddSingleton<UIContextOperation>(uIContextOperation); // 注册UI线程操作上下文
+        collection.AddSingleton<IFlowEnvironment>(flowEnvironmentDecorator); // 注册运行环境
+        collection.AddSingleton<IFlowEnvironmentEvent>(flowEnvironmentDecorator); // 注册运行环境事件
+        //var strte =  tcs.Task.ConfigureAwait(false).GetAwaiter().GetResult();
+        //if (strte) // 等待实例生成完成
+        //{
+        //} 
+        #endregion
+
+    }
+}
+
+
+public partial class App : Application
+{
+    private static IServiceProvider? ServiceProvider;
+    public static T GetService<T>() where T : class
+    {
+        return ServiceProvider?.GetService<T>() ?? throw new NullReferenceException();
+    }
+
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+
+    public override async void OnFrameworkInitializationCompleted()
+    {
+        // 如果使用 CommunityToolkit，则需要用下面一行移除 Avalonia 数据验证。
+        // 如果没有这一行，数据验证将会在 Avalonia 和 CommunityToolkit 中重复。
+        BindingPlugins.DataValidators.RemoveAt(0);
+
+        // 注册应用程序运行所需的所有服务
+        var collection = new ServiceCollection();
+        collection.AddWorkbenchServices();
+        collection.AddFlowServices();
+        collection.AddViewModelServices();
+        var services = collection.BuildServiceProvider(); // 绑定并返回获取实例的服务接口
+        App.ServiceProvider = services;
+        
+
+        var vm = App.ServiceProvider?.GetRequiredService<MainViewModel>(); 
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow
+            {
+                DataContext = vm
+            };
+        }
+        else if (ApplicationLifetime is ISingleViewApplicationLifetime singleViewPlatform)
+        {
+            singleViewPlatform.MainView = new MainView
+            {
+                DataContext = vm
+            };
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+
+}