Use more robust method of checking for headless

Author: ERSUCC

build.sbt

@@ -14,7 +14,7 @@ lazy val rScriptFiles   = settingKey[Seq[File]]("list of R scripts to include in
 rScriptFiles := Seq(baseDirectory.value / "src" / "rext.R", baseDirectory.value / "src" / "rlibs.R")
 
 // This version number gets ignored.  The NL version comes from the Language Library.  --Jason B. (8/28/25)
-netLogoVersion       := "7.0.0-RC1-e8801f2"
+netLogoVersion       := "7.0.0-424b50b"
 netLogoPackageExtras ++= rScriptFiles.value.map( (f) => (f, None) )
 netLogoZipExtras     ++= Seq(baseDirectory.value / "demos", baseDirectory.value / "README.md")
 

src/main/scala/SRMenu.scala

@@ -8,7 +8,7 @@ import org.nlogo.app.App
 import org.nlogo.core.I18N
 import org.nlogo.swing.{ MenuItem, OptionPane }
 
-import org.nlogo.languagelibrary.config.{ Config, Menu, Platform }
+import org.nlogo.languagelibrary.config.{ Config, Menu }
 
 trait SRMenu {
 

src/main/scala/SimpleRExtension.scala

@@ -12,14 +12,14 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.{ JsonMethods, Json4sScalaModule }
 
 import org.nlogo.languagelibrary.{ Logger, Subprocess }
-import org.nlogo.languagelibrary.config.{ Config, Platform }
+import org.nlogo.languagelibrary.config.Config
 import org.nlogo.languagelibrary.prims.{ EnableDebug }
 import org.nlogo.agent.{ Agent, AgentSet }
 import org.nlogo.api.{ Argument, Command, Context, DefaultClassManager, ExtensionException, ExtensionManager, FileIO, PrimitiveManager, Reporter, Workspace }
 import org.nlogo.core.{ LogoList, Syntax }
 
 object SimpleRExtension {
-  private var _isHeadless: Boolean = false
+  private var _isHeadless = true
   def isHeadless: Boolean = _isHeadless
 
   private var _codeName = "sr"
@@ -149,7 +149,7 @@ class SimpleRExtension extends DefaultClassManager {
   override def runOnce(em: ExtensionManager): Unit = {
     super.runOnce(em)
 
-    SimpleRExtension._isHeadless = Platform.isHeadless(em)
+    SimpleRExtension._isHeadless = !em.workspaceContext.workspaceGUI
 
     if (!SimpleRExtension.isHeadless) {
       SimpleRExtension.srMenu = new SRMenuGUI

test/Tests.scala

@@ -1,14 +1,12 @@
 package org.nlogo.extensions.simpler
 
 import java.io.File
+
 import org.nlogo.headless.TestLanguage
 
 object Tests {
   val testFileNames = Seq("tests.txt")
   val testFiles     = testFileNames.map( (f) => (new File(f)).getCanonicalFile )
 }
 
-class Tests extends TestLanguage(Tests.testFiles) {
-  System.setProperty("org.nlogo.preferHeadless", "true")
-  System.setProperty("java.awt.headless", "true")
-}
+class Tests extends TestLanguage(Tests.testFiles)