How to start multiple windows from F# using Elmish.WPF? - f#

Question

I am a newbie to Elmish.WPF and F#. In studying the tutorial on NewWindow/NewWindow.Views, the authors have assigned the following code from C# :
using System;
using Elmish.WPF.Samples.NewWindow;
using static Elmish.WPF.Samples.NewWindow.Program;
namespace NewWindow.Views {
public static class Program {
[STAThread]
public static void Main() =>
main(new MainWindow(), () => new Window1(), () => new Window2());
}
}
That is calling the main method in the F# NewWindow.Views project:
let main mainWindow (createWindow1: Func<#Window>) (createWindow2: Func<#Window>) =
let createWindow1 () = createWindow1.Invoke()
let createWindow2 () =
let window = createWindow2.Invoke()
window.Owner <- mainWindow
window
let bindings = App.mainBindings createWindow1 createWindow2
Program.mkSimpleWpf App.init App.update bindings
|> Program.withConsoleTrace
|> Program.runWindowWithConfig
{ ElmConfig.Default with LogConsole = true; Measure = true }
mainWindow
How can the F# module main routine be changed so as to use it directly as the EntryPoint and avoid it being a function? That is, I would like the F# module to have direct control over the windows via Elmish. Something along the lines as below but with the invocation of the subordinate windows self-contained:
/// This is the application's entry point. It hands things off to Elmish.WPF
[<EntryPoint; STAThread>]
let main _ =
Program.mkSimpleWpf init update bindings
|> Program.runWindow (MainWindow())
In short, I would like the C# Views to have no knowledge of the F# project.
Can this be done with Elmish.wpf?
Any help (especially sample code :) ) would be most helpful.

Answer 1

I am one of the maintainers of Elmish.WPF. Until very recently, all the samples used their F# project as the entry point. If you clone the repo and check out this commit, then you can inspect those samples and see how to achieve your goal.
Going forward, I created this issue to consider including at least one sample with an F# project as its entry point.
In the future, feel free to ask any of your Elmish.WPF questions by opening an issue in our GitHub.