Updated project further

Updated scala version to 2.13.4
Compiles to Java 11 now
Updated sbt to 1.4.3
Updated scalafx version to 14
Removed unneeded dependencies
Removed Akka code
Added lint and fatal warnings scalac options
Added parantheses to side effecting methods
Added >> and << methods to observables

.gitignore

@@ -46,3 +46,10 @@ bin
 /log
 /*.script
 typescript
+
+.metals
+.sbt
+.vscode
+.bsp
+.bloop
+metals.sbt

.sbtopts

@@ -1,4 +1,3 @@
 -J-Xmx4G
 -J-XX:MaxMetaspaceSize=4g
--J-XX:+UnlockCommercialFeatures
 -J-XX:+FlightRecorder

build.sbt

@@ -27,21 +27,21 @@ lazy val root = (project in file ("."))
       jclBridge   % "runtime,optional",
       log4jBridge % "runtime,optional",
       logback     % "runtime,optional",
-      gerweckUtil,
-      scalaJava8,
+      // gerweckUtil,
+      // scalaJava8,
       scalaFx,
       cats,
       shapeless
     ),
 
 	libraryDependencies ++= javaFXModules.map( m =>
-	  "org.openjfx" % s"javafx-$m" % "12.0.2" classifier osName
+	  "org.openjfx" % s"javafx-$m" % "11.0.2" classifier osName
 	),
 
     /* Akka dependencies */
-    libraryDependencies ++= Seq (
-      akkaActor       % "optional",
-      akkaStream      % "optional",
-      gerweckUtilAkka % "optional"
-    )
+    // libraryDependencies ++= Seq (
+    //   akkaActor       % "optional",
+    //   akkaStream      % "optional",
+    //   gerweckUtilAkka % "optional"
+    // )
   )

project/BasicSettings.scala

@@ -73,6 +73,8 @@ trait BasicSettings extends ProjectSettings { st: SettingTemplate =>
       var options = Seq.empty[String]
       val sv = sver.value
 
+      options :+= "-Xlint"
+      options :+= "-Xfatal-warnings"
       options :+= "-unchecked"
       options :+= "-feature"
       if (deprecation) {
@@ -160,8 +162,8 @@ trait BasicSettings extends ProjectSettings { st: SettingTemplate =>
 
       if (sv.requireJava8) {
         options ++= Seq[String](
-          "-target", "1.8",
-          "-source", "1.8"
+          "-target", "11",
+          "-source", "11"
         )
       } else {
         options ++= Seq[String](

project/Dependencies.scala

@@ -34,10 +34,10 @@ object Dependencies {
   val logback         = "ch.qos.logback"         %  "logback-classic"    % logbackVersion
   val spire           = "org.spire-math"         %% "spire"              % spireVersion
   val commonsIo       = "commons-io"             %  "commons-io"         % commonsIoVersion
-  val groovy          = "org.codehaus.groovy"    %  "groovy-all"         % groovyVersion
+  // val groovy          = "org.codehaus.groovy"    %  "groovy-all"         % groovyVersion
   val gerweckUtil     = "org.gerweck.scala"      %% "gerweck-utils"      % gerweckUtilVersion
   val gerweckUtilAkka = "org.gerweck.scala"      %% "gerweck-utils-akka" % gerweckUtilVersion
-  val scalaJava8      = "org.scala-lang.modules" %% "scala-java8-compat" % scalaJava8Version
+  // val scalaJava8      = "org.scala-lang.modules" %% "scala-java8-compat" % scalaJava8Version
   val cats            = "org.typelevel"          %% "cats-core"          % catsVersion
   val shapeless       = "com.chuusai"            %% "shapeless"          % shapelessVersion
   val scallop         = "org.rogach"             %% "scallop"            % scallopVersion
@@ -81,8 +81,7 @@ object Dependencies {
   /* ********************************************************************** */
   /*                                ScalaFX                                 */
   /* ********************************************************************** */
-  // final val scalaFxVersion = "8.0.144-R12"
-  final val scalaFxVersion = "12.0.2-R18"
+  final val scalaFxVersion = "14-R19"
 
   val scalaFx = "org.scalafx" %% "scalafx" % scalaFxVersion
 

project/ProjectSettings.scala

@@ -11,7 +11,7 @@ trait ProjectSettings
   override final val githubOrganization    = "sarahgerweck"
   override final val githubProject         = "scalafx-utils"
 
-  override final val buildScalaVersion     = "2.13.1"
+  override final val buildScalaVersion     = "2.13.4"
   override final val extraScalaVersions    = Seq("2.11.12", "2.12.5")
   override final val defaultOptimize       = true
   override final val defaultOptimizeGlobal = false

project/build.properties

@@ -1 +1 @@
-sbt.version=1.3.8
+sbt.version=1.4.3

project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.thoughtworks.sbt-api-mappings" % "sbt-api-mappings" % "2.0.2")

src/main/scala/org/gerweck/scalafx/akka/AkkaFX.scala

@@ -1,74 +1,74 @@
-package org.gerweck.scalafx.akka
+// package org.gerweck.scalafx.akka
 
-import scala.concurrent._
+// import scala.concurrent._
 
-import akka.Done
-import akka.stream.OverflowStrategy
-import akka.stream.scaladsl._
+// import akka.Done
+// import akka.stream.OverflowStrategy
+// import akka.stream.scaladsl._
 
-import scalafx.application.Platform.runLater
-import scalafx.beans.property.Property
-import scalafx.beans.value.ObservableValue
+// import scalafx.application.Platform.runLater
+// import scalafx.beans.property.Property
+// import scalafx.beans.value.ObservableValue
 
-/** A master object that exposes all the Akka-ScalaFX bridges.
-  *
-  * @author Sarah Gerweck <sarah.a180@gmail.com>
-  */
-object AkkaFX extends AkkaStreamFX with AkkaFXCollections
+// /** A master object that exposes all the Akka-ScalaFX bridges.
+//   *
+//   * @author Sarah Gerweck <sarah.a180@gmail.com>
+//   */
+// object AkkaFX extends AkkaStreamFX with AkkaFXCollections
 
-trait AkkaStreamFX extends Any {
-  /** A [[akka.stream.scaladsl.Sink]] that sends all values to a
-    * [[scalafx.beans.property.Property]].
-    *
-    * Each event that's written into the `Sink` will trigger an update of the
-    * `Property` with the streamed value.
-    */
-  def observableSink[A](prop: Property[A, _]): Sink[A, Future[Done]] = {
-    Sink.foreach[A] { a =>
-      runLater {
-        prop.value = a
-      }
-    }
-  }
+// trait AkkaStreamFX extends Any {
+//   /** A [[akka.stream.scaladsl.Sink]] that sends all values to a
+//     * [[scalafx.beans.property.Property]].
+//     *
+//     * Each event that's written into the `Sink` will trigger an update of the
+//     * `Property` with the streamed value.
+//     */
+//   def observableSink[A](prop: Property[A, _]): Sink[A, Future[Done]] = {
+//     Sink.foreach[A] { a =>
+//       runLater {
+//         prop.value = a
+//       }
+//     }
+//   }
 
-  /** A [[akka.stream.scaladsl.Source]] that generates an event for each
-    * change of an [[scalafx.beans.value.ObservableValue]].
-    *
-    * This source adds an `onChange` handler to the given `ObservableValue`.
-    * Each time it observes a change, the new value is pushed from the
-    * `Source`. The change handler is registered as soon as the source is
-    * materialized into a graph. It should be safe to use a single source
-    * in several graphs, as each will register its own change listener upon
-    * materialization.
-    *
-    * @param prop The value to observe.
-    *
-    * @param queueSize The maximum number of values to queue while waiting for
-    * the downstream flow to consume more data.
-    *
-    * @param overflow What to do when the queue is full because the downstream
-    * flow cannot keep up. The default behavior is to block, slowing the UI's
-    * main thread until some events are consumed, freeing space in the queue.
-    */
-  def observableSource[A](prop: ObservableValue[_, A],
-                          queueSize: Int = 10,
-                          overflow: OverflowStrategy = OverflowStrategy.backpressure
-                        )(implicit ec: ExecutionContext) = {
-    val src = Source
-      .queue[A](queueSize, overflow)
-      .mapMaterializedValue { m =>
-        val sub = {
-          prop.onChange { (dta, oldV, newV) =>
-            m.offer(newV)
-          }
-        }
-        m.watchCompletion foreach { c =>
-          runLater {
-            sub.cancel()
-          }
-        }
-        m
-      }
-    src
-  }
-}
+//   /** A [[akka.stream.scaladsl.Source]] that generates an event for each
+//     * change of an [[scalafx.beans.value.ObservableValue]].
+//     *
+//     * This source adds an `onChange` handler to the given `ObservableValue`.
+//     * Each time it observes a change, the new value is pushed from the
+//     * `Source`. The change handler is registered as soon as the source is
+//     * materialized into a graph. It should be safe to use a single source
+//     * in several graphs, as each will register its own change listener upon
+//     * materialization.
+//     *
+//     * @param prop The value to observe.
+//     *
+//     * @param queueSize The maximum number of values to queue while waiting for
+//     * the downstream flow to consume more data.
+//     *
+//     * @param overflow What to do when the queue is full because the downstream
+//     * flow cannot keep up. The default behavior is to block, slowing the UI's
+//     * main thread until some events are consumed, freeing space in the queue.
+//     */
+//   def observableSource[A](prop: ObservableValue[_, A],
+//                           queueSize: Int = 10,
+//                           overflow: OverflowStrategy = OverflowStrategy.backpressure
+//                         )(implicit ec: ExecutionContext) = {
+//     val src = Source
+//       .queue[A](queueSize, overflow)
+//       .mapMaterializedValue { m =>
+//         val sub = {
+//           prop.onChange { (dta, oldV, newV) =>
+//             m.offer(newV)
+//           }
+//         }
+//         m.watchCompletion() foreach { c =>
+//           runLater {
+//             sub.cancel()
+//           }
+//         }
+//         m
+//       }
+//     src
+//   }
+// }

src/main/scala/org/gerweck/scalafx/akka/AkkaFXCollections.scala

@@ -1,72 +1,72 @@
-package org.gerweck.scalafx.akka
+// package org.gerweck.scalafx.akka
 
-import language.implicitConversions
+// import language.implicitConversions
 
-import scala.collection.mutable.{ Clearable, Growable }
-import scala.concurrent._
-import scala.concurrent.duration._
-import scala.util._
+// import scala.collection.mutable.{ Clearable, Growable }
+// import scala.concurrent._
+// import scala.concurrent.duration._
+// import scala.util._
 
-import akka.{ Done, NotUsed }
-import akka.stream.Materializer
-import akka.stream.scaladsl._
+// import akka.{ Done, NotUsed }
+// import akka.stream.Materializer
+// import akka.stream.scaladsl._
 
-import scalafx.application.Platform.runLater
-import scalafx.beans.Observable
-import scalafx.beans.property._
+// import scalafx.application.Platform.runLater
+// import scalafx.beans.Observable
+// import scalafx.beans.property._
 
-import org.gerweck.scalafx.util.FutureObservable
+// import org.gerweck.scalafx.util.FutureObservable
 
-trait AkkaFXCollections extends Any {
-  implicit def sourceToRichSource[A, B](source: Source[A, B]) = new AkkaFXCollections.RichSource(source)
-}
+// trait AkkaFXCollections extends Any {
+//   implicit def sourceToRichSource[A, B](source: Source[A, B]) = new AkkaFXCollections.RichSource(source)
+// }
 
-object AkkaFXCollections {
-  def collectionWriterSink[A]
-        (buffer: Observable with Growable[A] with Clearable,
-         clearFirst: Boolean,
-         groupingSize: Int = 50, groupingTimeout: FiniteDuration = 100.milliseconds)
-      : Sink[A, Future[Done]] = {
-    sealed trait PopulateAction
-    case class InsertRows(data: Seq[A]) extends PopulateAction
-    case object ClearData extends PopulateAction
+// object AkkaFXCollections {
+//   def collectionWriterSink[A]
+//         (buffer: Observable with Growable[A] with Clearable,
+//          clearFirst: Boolean,
+//          groupingSize: Int = 50, groupingTimeout: FiniteDuration = 100.milliseconds)
+//       : Sink[A, Future[Done]] = {
+//     sealed trait PopulateAction
+//     case class InsertRows(data: Seq[A]) extends PopulateAction
+//     case object ClearData extends PopulateAction
 
-    val grouping = {
-      Flow[A]
-        .groupedWithin(groupingSize, groupingTimeout)
-        .map(InsertRows)
-        .named("GroupInsertActions")
-    }
+//     val grouping = {
+//       Flow[A]
+//         .groupedWithin(groupingSize, groupingTimeout)
+//         .map(InsertRows)
+//         .named("GroupInsertActions")
+//     }
 
-    val clearData = {
-      if (clearFirst)
-        Source.single(ClearData)
-      else
-        Source.empty
-    }.named("OptionalClearAction")
+//     val clearData = {
+//       if (clearFirst)
+//         Source.single(ClearData)
+//       else
+//         Source.empty
+//     }.named("OptionalClearAction")
 
-    val combinedSource: Flow[A, PopulateAction, NotUsed] = grouping.prepend(clearData)
-    combinedSource .toMat {
-      Sink .foreach[PopulateAction] {
-        case ClearData        => runLater { buffer.clear() }
-        case InsertRows(data) => runLater { buffer ++= data }
-      } .named("BufferWriter")
-    }(Keep.right)
-  }
+//     val combinedSource: Flow[A, PopulateAction, NotUsed] = grouping.prepend(clearData)
+//     combinedSource .toMat {
+//       Sink .foreach[PopulateAction] {
+//         case ClearData        => runLater { buffer.clear() }
+//         case InsertRows(data) => runLater { buffer ++= data }
+//       } .named("BufferWriter")
+//     }(Keep.right)
+//   }
 
-  class RichSource[A, B](val inner: Source[A, B]) extends AnyVal {
-    def populateCollection[C >: A]
-          (buffer: Observable with Growable[C] with Clearable,
-           clearFirst: Boolean,
-           groupingSize: Int = 50, groupingTimeout: FiniteDuration = 100.milliseconds)
-          (implicit mat: Materializer, ec: ExecutionContext)
-        : ReadOnlyObjectProperty[Option[Try[Done]]] = {
+//   class RichSource[A, B](val inner: Source[A, B]) extends AnyVal {
+//     def populateCollection[C >: A]
+//           (buffer: Observable with Growable[C] with Clearable,
+//            clearFirst: Boolean,
+//            groupingSize: Int = 50, groupingTimeout: FiniteDuration = 100.milliseconds)
+//           (implicit mat: Materializer, ec: ExecutionContext)
+//         : ReadOnlyObjectProperty[Option[Try[Done]]] = {
 
-      val sink = collectionWriterSink(buffer, clearFirst, groupingSize, groupingTimeout)
+//       val sink = collectionWriterSink(buffer, clearFirst, groupingSize, groupingTimeout)
 
-      val graph = inner.toMat(sink)(Keep.right)
+//       val graph = inner.toMat(sink)(Keep.right)
 
-      FutureObservable.ofTryOption(graph.run())
-    }
-  }
-}
+//       FutureObservable.ofTryOption(graph.run())
+//     }
+//   }
+// }

src/main/scala/org/gerweck/scalafx/util/SingletonStage.scala

@@ -46,7 +46,7 @@ abstract class SingletonStage {
   /** Create the stage, or give it focus if it already exists.
     *
     * This needs to be executed within the UI thread. If you're not already within some kind
-    * of event handler, you need to use [[scalafx.application.Platform.runLater]].
+    * of event handler, you need to use [[scalafx.application.Platform$.runLater[R](op:=>R):Unit*]].
     */
   def showStage(): Unit = {
     State.currentStage match {

src/main/scala/org/gerweck/scalafx/util/control/ControlPanel.scala

@@ -28,7 +28,7 @@ object HorizontalControlPanel {
             alignment = Pos.CenterRight
           }
         case SeparatorEntry =>
-          Separators.vertical
+          Separators.vertical()
       }
     }
 }
@@ -56,9 +56,6 @@ object ControlPanel {
   def apply(controls: ControlPanelEntry*): Pane = VerticalControlPanel(controls: _*)
 
   private[this] lazy val defaultFont = new Font(Font.default)
-  private[this] lazy val boldFont = {
-    Font(defaultFont.family, FontWeight.Bold, defaultFont.size)
-  }
 
   private[this] lazy val labelsFont = defaultFont
 

src/main/scala/org/gerweck/scalafx/util/control/DialogButtons.scala

@@ -5,7 +5,6 @@ import org.log4s._
 
 import scalafx.Includes._
 import scalafx.event.ActionEvent
-import scalafx.event.ActionEvent
 import scalafx.geometry.Insets
 import scalafx.scene.Node
 import scalafx.scene.control._
@@ -13,7 +12,6 @@ import scalafx.scene.layout._
 import scalafx.stage.Stage
 import javafx.scene.{ Node => JNode }
 import javafx.scene.layout.{ Region => JRegion }
-import scalafx.delegate.SFXDelegate
 
 /** A standard button bar with the major dialog buttons.
   *
@@ -72,7 +70,7 @@ class DialogButtons(stage: Stage, showOk: Boolean = true, showApply: Boolean = t
     }
   }
 
-  protected[control] def mainLayout = new VBox(Separators.horizontal, bar) {
+  protected[control] def mainLayout = new VBox(Separators.horizontal(), bar) {
     hgrow = Priority.Always
   }
 

src/main/scala/org/gerweck/scalafx/util/observable.scala

@@ -42,7 +42,7 @@ private object ObservableImplicits {
       val prop = ObjectProperty[B](originalValue)
 
       var prevValue = originalValue
-      def changeHandler = prop.synchronized {
+      def changeHandler() = prop.synchronized {
         val newVal = recalculate()
         if (prevValue != newVal) {
           prop.value = newVal
@@ -50,7 +50,7 @@ private object ObservableImplicits {
         }
       }
 
-      a onChange changeHandler
+      a onChange changeHandler()
       prop
     }
 
@@ -68,7 +68,7 @@ private object ObservableImplicits {
 
       var prevValue = originalValue
 
-      def changeHandler = prop.synchronized {
+      def changeHandler() = prop.synchronized {
         val newVal = recalculate()
         if (prevValue != newVal) {
           prop.value = newVal
@@ -76,8 +76,8 @@ private object ObservableImplicits {
         }
       }
 
-      fa onChange changeHandler
-      f onChange changeHandler
+      fa onChange changeHandler()
+      f onChange changeHandler()
 
       prop
     }
@@ -110,7 +110,7 @@ private object ObservableImplicits {
           prevValue = newVal
         }
       }
-      var innerSub = oa() onChange innerHandle
+      var innerSub = oa() onChange innerHandle()
 
       var prevOuter = oa()
       def outerHandle() = prop.synchronized {
@@ -118,13 +118,13 @@ private object ObservableImplicits {
         /* We need reference equality here: we're subscribing to a specific object. */
         if (prevOuter ne newOuter) {
           innerSub.cancel()
-          innerSub = newOuter onChange innerHandle
+          innerSub = newOuter onChange innerHandle()
           prevOuter = newOuter
           innerHandle()
         }
       }
 
-      ooa onChange outerHandle
+      ooa onChange outerHandle()
 
       prop
     }
@@ -159,7 +159,7 @@ private object ObservableImplicits {
           prevValue = newVal
         }
       }
-      var innerSub = oa() onChange innerHandle
+      var innerSub = oa() onChange innerHandle()
 
       var prevOuter = oa()
       def outerHandle() = prop.synchronized {
@@ -167,13 +167,13 @@ private object ObservableImplicits {
         /* We need reference equality here: we're subscribing to a specific object. */
         if (prevOuter ne newOuter) {
           innerSub.cancel()
-          innerSub = newOuter onChange innerHandle
+          innerSub = newOuter onChange innerHandle()
           prevOuter = newOuter
           innerHandle()
         }
       }
 
-      ooa onChange outerHandle
+      ooa onChange outerHandle()
 
       prop
     }
@@ -218,6 +218,8 @@ final class RichObservable[A, C](val self: ObservableValue[A, C]) extends AnyVal
   def tuple[B](f: Observable[B]): Observable[(A,B)] = oapp.tuple2(self, f)
   final def *>[B](fb: ObjObs[B]): Observable[B] = oapp.map2(self,fb)((_,b) => b)
   final def <*[B](fb: ObjObs[B]): Observable[A] = oapp.map2(self,fb)((a,_) => a)
+  final def >>[B](fb: => ObjObs[B]): Observable[B] = oapp.map2(self, fb)((_, b) => b)
+  final def <<[B](fb: => ObjObs[B]): Observable[A] = oapp.map2(self, fb)((a, _) => a)
 
   final def |@|[B, B1](fb: ObservableValue[B, B1]) = ObservableTupler(self, fb)
 

src/main/scala/org/gerweck/scalafx/util/observableCollection.scala

@@ -1,6 +1,6 @@
 package org.gerweck.scalafx.util
 
-import scala.compat.java8.FunctionConverters._
+// import scala.compat.java8.FunctionConverters._
 
 import java.util.function.{ Predicate => JPredicate }
 
@@ -58,9 +58,9 @@ final class RichObservableBuffer[A](val obs: ObservableBuffer[A]) extends AnyVal
     fb.predicate <== predicate
     fb
   }
-  def observeFiltered[B >: A](predicate: Observable[B => Boolean]): FilteredBuffer[A] = {
-    observeFiltered(predicate.map[JPredicate[A]](asJavaPredicate))
-  }
+  // def observeFiltered[B >: A](predicate: Observable[B => Boolean]): FilteredBuffer[A] = {
+  //   observeFiltered(predicate.map[JPredicate[A]](asJavaPredicate))
+  // }
 }
 
 final class RichObservableArray[A, B <: ObservableArray[A, B, C], C <: javafx.collections.ObservableArray[C]](val oaa: ObservableArray[A, B, C]) extends AnyVal with RichObservableSeqLike[A] {

src/main/scala/org/gerweck/scalafx/util/prefs/ObservablePref.scala

@@ -1,62 +1,62 @@
-package org.gerweck.scalafx.util
-package prefs
-
-import java.util.prefs._
-
-import scalafx.application.Platform.runLater
-import scalafx.beans.property.ObjectProperty
-
-import org.gerweck.scala.util.prefs._
-
-/* TODO: take an implicit that will deteremine whether this is an `ObjectProperty` or what */
-class ObservablePref[A] protected (path: String)(implicit handler: Pref.AccessHandler[A], prefs: Preferences)
-    extends Pref[A](path) { thisPref =>
-
-  lazy val observe: ObjectProperty[A] = {
-    val initialValue: A = this()
-    val property = ObjectProperty[A](initialValue)
-
-    /* We build two bridges, one that listens for changes in the preferences system and pushes
-     * them into the observable property, and another that listens for updates to the property and
-     * pushes them to the preference system. Each bridge is gated so that it only activates if the
-     * value has actually changed, which prevents the infinite looping that would otherwise occur
-     * in a bidirectional bridge. */
-
-    /* Preferences => Property bridge */
-
-    /* In Scala 2.12, the callback could just be bare inside `addPreferenceChangeListener`.
-     * However, it must be created explicitly since we cross-compile against Scala 2.11. */
-    val changeListener = new PreferenceChangeListener {
-      def preferenceChange(pce: PreferenceChangeEvent): Unit = {
-        if (pce.getKey == path) {
-          runLater {
-            val currentValue = thisPref()
-            if (property.value != currentValue) {
-              property.value = currentValue
-            }
-          }
-        }
-      }
-    }
-    prefs.addPreferenceChangeListener(changeListener)
-
-    /* Property => Preferences bridge */
-    property.onChange { (_, _, newV) =>
-      if (newV != this()) {
-        this() = newV
-      }
-    }
-
-    /* Return the bridged property */
-    property
-  }
-}
-
-object ObservablePref {
-  def apply[A](path: String)(implicit handler: PrefHandler[A], prefs: Preferences) = {
-    new ObservablePref(path)(new Pref.AccessHandler.Optional, prefs)
-  }
-  def apply[A](path: String, default: A)(implicit handler: PrefHandler[A], prefs: Preferences) = {
-    new ObservablePref(path)(new Pref.AccessHandler.Defaulted(default), prefs)
-  }
-}
+// package org.gerweck.scalafx.util
+// package prefs
+
+// import java.util.prefs._
+
+// import scalafx.application.Platform.runLater
+// import scalafx.beans.property.ObjectProperty
+
+// import org.gerweck.scala.util.prefs._
+
+// /* TODO: take an implicit that will deteremine whether this is an `ObjectProperty` or what */
+// class ObservablePref[A] protected (path: String)(implicit handler: Pref.AccessHandler[A], prefs: Preferences)
+//     extends Pref[A](path) { thisPref =>
+
+//   lazy val observe: ObjectProperty[A] = {
+//     val initialValue: A = this()
+//     val property = ObjectProperty[A](initialValue)
+
+//     /* We build two bridges, one that listens for changes in the preferences system and pushes
+//      * them into the observable property, and another that listens for updates to the property and
+//      * pushes them to the preference system. Each bridge is gated so that it only activates if the
+//      * value has actually changed, which prevents the infinite looping that would otherwise occur
+//      * in a bidirectional bridge. */
+
+//     /* Preferences => Property bridge */
+
+//     /* In Scala 2.12, the callback could just be bare inside `addPreferenceChangeListener`.
+//      * However, it must be created explicitly since we cross-compile against Scala 2.11. */
+//     val changeListener = new PreferenceChangeListener {
+//       def preferenceChange(pce: PreferenceChangeEvent): Unit = {
+//         if (pce.getKey == path) {
+//           runLater {
+//             val currentValue = thisPref()
+//             if (property.value != currentValue) {
+//               property.value = currentValue
+//             }
+//           }
+//         }
+//       }
+//     }
+//     prefs.addPreferenceChangeListener(changeListener)
+
+//     /* Property => Preferences bridge */
+//     property.onChange { (_, _, newV) =>
+//       if (newV != this()) {
+//         this() = newV
+//       }
+//     }
+
+//     /* Return the bridged property */
+//     property
+//   }
+// }
+
+// object ObservablePref {
+//   def apply[A](path: String)(implicit handler: PrefHandler[A], prefs: Preferences) = {
+//     new ObservablePref(path)(new Pref.AccessHandler.Optional, prefs)
+//   }
+//   def apply[A](path: String, default: A)(implicit handler: PrefHandler[A], prefs: Preferences) = {
+//     new ObservablePref(path)(new Pref.AccessHandler.Defaulted(default), prefs)
+//   }
+// }

version.sbt

@@ -1 +1 @@
-version in ThisBuild := "0.14.4-SNAPSHOT"
+version in ThisBuild := "0.15.0"