TornadoFX example of opening a normal window or a selection window based on command line args

MyTornadoApp.kt

import tornadofx.*

// Example of opening a normal window or a selection window based on command line args
// If there is an argument, it is the ID of the model to open a normal window for.
// If there is no argument, select an ID and open a window for it.

// model - also used outside of GUI
class MyModel(val id:Int) {
    fun doStuff() {
        println( "My id is ${id}" )
    }
}

// the normal application window
// There is no NormalApplication because I cannot create the NormalScope ahead of time for it

class NormalScope(val model:MyModel):Scope()

class NormalController: Controller() {
    override val scope:NormalScope = super.scope as NormalScope
}
class NormalView:View() {
    val controller:NormalController by inject()
    override val root = vbox {
        button( "open new window" ) {
            action {
                find(SelectorView::class).openWindow(owner=null)
            }
        }
        label( "my ID is ${controller.scope.model.id}" )
        button( "do stuff" ) {
            action {
                controller.scope.model.doStuff()
            }
        }
    }
}

// launcher window/app - gets the model based on params and launches the normal application window

// map of javafx raw param -> model
val map:MutableMap<String,MyModel> = mutableMapOf()

class LauncherApp:App(LauncherView::class)

class LauncherView:View() {
    override val root = label("nobody should see this")
    override fun onBeforeShow() {
        super.onBeforeShow()
        val key = app.parameters.raw.first()
        val model = map[key]!!
        val scope = NormalScope(model)
        // launch NormalView and close this view
        find(NormalView::class,scope).openWindow(owner=null)
        javafx.application.Platform.runLater { close() }
    }
}

// the model selector window
// can use an App because it does not need a custom scope
class SelectorApp:App(SelectorView::class)

class SelectorView:View() {
    override val root = vbox {
        (1 until 5).map { id ->
            button("open ${id}") {
                action {
                    val model = MyModel(id)
                    val scope = NormalScope(model)
                    find(NormalView::class,scope).openWindow(owner=null)
                    close()
                }
            }
        }
    }
}

object Main {
    @JvmStatic
    fun main(args:Array<String>) {
        if ( args.size == 1 ) {
            // arg is model ID. Launch normal window
            val id = args[0].toInt()
            val model = MyModel(id)
            // store the model in map so we can retrieve it by the param
            val key = java.util.UUID.randomUUID().toString()
            map[key] = model
            launch<LauncherApp>(key)
        } else {
            // launch selector window
            launch<SelectorApp>()
        }
    }
}