scala - How can you get ScalaFX to play nice in the SBT console? -

i'm writing image library intro programming students play with. (i stole idea , patterns image library drracket.)

https://github.com/dupontmanualhs/dm-image

it's written in swing (that's master branch), i'm trying convert scalafx (see scalafx branch), , there issues. ideally, student should able like:

scala> import org.dupontmanual.image._ scala> trainengine.display() 

and have dialog box train engine show up. i've tried using code at

https://github.com/scalafx/scalafx-tutorials

in stand-alone-dialog project, if include system.exit(0) after dialog.showandwait(), error:

not interrupting system thread thread[process reaper,10,system] exception while removing reference: java.lang.interruptedexception java.lang.interruptedexception     @ java.lang.object.wait(native method)     @ java.lang.ref.referencequeue.remove(referencequeue.java:135)     @ java.lang.ref.referencequeue.remove(referencequeue.java:151)     @ com.sun.glass.utils.disposer.run(disposer.java:69)     @ java.lang.thread.run(thread.java:744) not interrupting system thread thread[prism font disposer,10,system] exception in runnable exception in thread "javafx application thread" 

(note same error if try run app stand-alone-dialog in console, i'm guessing calling system.exit(0) not great idea in sbt console.)

if leave system.exit(0) line out, things seem work fine--mostly. after first time display dialog, doesn't bring dialog focus, have click dismiss dialog. real problem when :q exit console, sbt hangs , have ctrl-c able type again. (and, yes, ctrl-c exits sbt completely, not console.)

i think may need create thread scalafx stuff. example, have method stack 1 image on top of another, , got illegalstateexception when tried call function, though doesn't display anything, creates new group 2 previous nodes stacked appropriately. unfortunately, i'm not sure how create new thread , make sure image-related runs through that.

i've set fork := true in build.sbt, doesn't seem make difference console.

== update ==

i found initialcommands , cleanupcommands in sbt documentation , tried clean after when console starts , ends. values are:

initialcommands in console := """import org.dupontmanual.image._; org.dupontmanual.image.initialize()"""  cleanupcommands in console := """org.dupontmanual.image.cleanup()""" 

which defined thusly:

package object image {   var masterframe: jframe = _    def initialize() {     masterframe = new jframe()     masterframe.add(new jfxpanel())     masterframe.setdefaultcloseoperation(jframe.exit_on_close)   }    def cleanup() {     println("exiting platform")     platform.exit()     println("disposing of frames")     frame.getframes().foreach {       _.dispose()     }     println("frames disposed")     system.exit(0);   } 

here's result of running console , trying quit:

> console [info] compiling 1 scala source /home/sysadmin/dm-workspace/dm-image/target/scala-2.10/classes... [info] starting scala interpreter... [info]  import org.dupontmanual.image._ welcome scala version 2.10.3 (java hotspot(tm) 64-bit server vm, java 1.7.0_51). type in expressions have them evaluated. type :help more information.  scala> hacker.display()  scala> :q exiting platform disposing of frames frames disposed not interrupting system thread thread[xtoolkt-shutdown-thread,5,system] not interrupting system thread thread[awt-xawt,6,system] not interrupting system thread thread[prism font disposer,10,system] not interrupting system thread thread[java2d disposer,10,system] exception while removing reference: java.lang.interruptedexception java.lang.interruptedexception     @ java.lang.object.wait(native method)     @ java.lang.ref.referencequeue.remove(referencequeue.java:135)     @ java.lang.ref.referencequeue.remove(referencequeue.java:151)     @ com.sun.glass.utils.disposer.run(disposer.java:69)     @ java.lang.thread.run(thread.java:744)  exception: sbt.trapexitsecurityexception thrown uncaughtexceptionhandler in thread "run-main-0" 

and doesn't exit console. still have use ctrl-c, exits out of sbt completely.

something still running, can't figure out is. grrr.

i think problem somehow need fork console, perhaps it's issue: https://github.com/sbt/sbt/issues/1918

the following idea seems work: instead of sbt console embed repl, such ammonite. still sbt run doesn't work, fork in run := true. packaging fat jar , running seem work:

build.sbt

name := "foo"  version := "0.1.0"  scalaversion := "2.11.7"  librarydependencies ++= seq(   "org.scala-lang.modules" %% "scala-swing"   % "1.0.2",   "com.lihaoyi"            %  "ammonite-repl" % "0.5.1" cross crossversion.full ) 

project/build.properties

sbt.version=0.13.9 

project/plugins.sbt

addsbtplugin("com.eed3si9n" % "sbt-assembly" % "0.14.1") 

src/main/scala/foo/main.scala

package foo  import scala.swing._  object main extends app {   def test(): unit = swing.onedt {     new mainframe {       contents = new label("app exits if close window")     } .open()   }    ammonite.repl.main.run("") } 

then

$ sbt assembly ... $ java -jar target/scala-2.11/foo-assembly-0.1.0.jar loading... welcome ammonite repl 0.5.1 (scala 2.11.7 java 1.8.0_66) @ foo.main.test() 

the oddity after application exists, shell character echoing broken, perhaps that's issue of ammonite, might want try default scala repl.