File-based WinUI app

[dotMorten]

Managed to get a file based dotnet run app to work with reactor.

Add the following code to a single App.cs file:

#:property TargetFramework=net10.0-windows10.0.22621.0
#:property WindowsAppSDKSelfContained=true
#:package Microsoft.UI.Reactor@0.1.0-*
using Microsoft.UI.Reactor;
using Microsoft.UI.Reactor.Core;
using static Microsoft.UI.Reactor.Factories;

ReactorApp.Run<App>("SingleFileReactor", width: 900, height: 600);

class App : Component
{
    public override Element Render()
    {
        var (name, setName) = UseState("World");

        return VStack(
            Heading($"Hello, {name}!"),
            TextField(name, setName, placeholder: "Your name").AutomationName("NameInput")
        );
    }
}

From command line run:

dotnet run App.cs -a x64

This gets more interesting if you're building a script and want some more advanced interactive user input as part of that script.
In this case the UI is launched if you run and specify interactive mode: dotnet run App.cs -- -i

#:property TargetFramework=net10.0-windows10.0.22621.0
#:property WindowsAppSDKSelfContained=true
#:package Microsoft.UI.Reactor@0.1.0-*

using Microsoft.UI.Reactor;
using Microsoft.UI.Reactor.Core;
using Microsoft.UI.Xaml;
using static Microsoft.UI.Reactor.Factories;

if(args.Length > 0 && (args[0] == "-i" || args[0] == "--interactive"))
{
    Console.WriteLine("Waiting for user to enter their name...");
    ReactorApp.Run<EnterUsernameApp>("Username", width: 300, height: 130);
}
else
{
    Console.WriteLine("Enter your user name:");
    AppState.Username = Console.ReadLine() ?? string.Empty;
}

if(string.IsNullOrEmpty(AppState.Username))
{
    Console.WriteLine("No username entered.");
    return -1;
}

Console.WriteLine($"Hello {AppState.Username}!");

return 0;

class EnterUsernameApp : Component
{
    public override Element Render()
    {
        var (name, setName) = UseState("");

        return VStack(
            TextField(name, setName, placeholder: "Enter username"),
            Button("Accept", () => {AppState.Username=name; ReactorApp.PrimaryWindow.Close();})
            .Disabled(string.IsNullOrEmpty(name)).HAlign(HorizontalAlignment.Stretch)
        ).Padding(10);
    }
}

static class AppState
{
    public static string Username { get; set; }
}