Fix Scala 2.13.0-RC1 compilation, fix a number of simple bugs / enhancements

build.sbt

@@ -4,20 +4,20 @@ scalaModuleSettings
 
 name               := "scala-swing"
 
-version            := "2.1.1-SNAPSHOT"
+version            := "2.1.1"
 
 scalacOptions in ThisBuild ++= Seq("-deprecation", "-feature")
 
 // Map[JvmMajorVersion, List[(ScalaVersion, UseForPublishing)]]
 scalaVersionsByJvm in ThisBuild := Map(
-   8 -> List("2.11.12", "2.12.8", "2.13.0-M5").map(_ -> true),
-   9 -> List("2.11.12", "2.12.8", "2.13.0-M5").map(_ -> false),
-  10 -> List("2.11.12", "2.12.8", "2.13.0-M5").map(_ -> false),
-  11 -> List("2.11.12", "2.12.8", "2.13.0-M5").map(_ -> false),
-  12 -> List("2.11.12", "2.12.8", "2.13.0-M5").map(_ -> false)
+   8 -> List("2.11.12", "2.12.8", "2.13.0-RC1").map(_ -> true),
+   9 -> List("2.11.12", "2.12.8", "2.13.0-RC1").map(_ -> false),
+  10 -> List("2.11.12", "2.12.8", "2.13.0-RC1").map(_ -> false),
+  11 -> List("2.11.12", "2.12.8", "2.13.0-RC1").map(_ -> false),
+  12 -> List("2.11.12", "2.12.8", "2.13.0-RC1").map(_ -> false)
 )
 
-scalaVersion in ThisBuild := "2.13.0-M5"  // for testing
+scalaVersion in ThisBuild := "2.12.8"
 
 OsgiKeys.exportPackage := Seq(s"scala.swing.*;version=${version.value}")
 
@@ -29,7 +29,7 @@ shellPrompt in ThisBuild := { state => Project.extract(state).currentRef.project
 lazy val swing = project.in(file("."))
   .settings(
     libraryDependencies += {
-      "org.scalatest" %% "scalatest" % "3.0.7" % Test
+      "org.scalatest" %% "scalatest" % "3.0.8-RC2" % Test
     },
     // Adds a `src/main/scala-2.13+` source directory for Scala 2.13 and newer
     // and  a `src/main/scala-2.13-` source directory for Scala version older than 2.13

src/main/scala-2.13+/scala/swing/BufferWrapper.scala

@@ -48,13 +48,11 @@ abstract class BufferWrapper[A] extends mutable.Buffer[A] {
     }
   }
 
-  override def patchInPlace(from: Int, patch: scala.collection.Seq[A], replaced: Int): this.type = {
+  override def patchInPlace(from: Int, patch: MoreElem[A], replaced: Int): this.type = {
     if (replaced > 0) {
       remove(from, replaced)
     }
-    if (patch.nonEmpty) {
-      insertAll(from, patch)
-    }
+    insertAll(from, patch)
     this
   }
 }

src/main/scala/scala/swing/Action.scala

@@ -81,11 +81,23 @@ abstract class Action(title0: String) {
     def actionPerformed(a: java.awt.event.ActionEvent): Unit = apply()
   }
 
-  /**
-   * Title is not optional.
-   */
-  def title: String = ifNull(peer.getValue(javax.swing.Action.NAME),"")
-  def title_=(t: String): Unit = peer.putValue(javax.swing.Action.NAME, t)
+  /** Gets the `NAME` property.
+    */
+  def text: String = ifNull(peer.getValue(javax.swing.Action.NAME),"")
+
+  /** Sets the `NAME` property.
+    */
+  def text_=(t: String): Unit = peer.putValue(javax.swing.Action.NAME, t)
+
+  /** An alias for `text`. This is kept for backwards compatibility.
+    *
+    * @see [[text]]
+    */
+  def title: String = text
+
+  /** An alias for `text_=`. This is kept for backwards compatibility.
+    */
+  def title_=(t: String): Unit  = text = t
 
   /**
    * None if large icon and small icon are not equal.

src/main/scala/scala/swing/Component.scala

@@ -203,20 +203,6 @@ abstract class Component extends UIElement {
 
   protected override def onFirstSubscribe(): Unit = {
     super.onFirstSubscribe()
-    // TODO: deprecated, remove after 2.8
-    peer.addComponentListener(new java.awt.event.ComponentListener {
-      def componentHidden(e: java.awt.event.ComponentEvent): Unit =
-        publish(event.UIElementHidden(Component.this))
-
-      def componentShown(e: java.awt.event.ComponentEvent): Unit =
-        publish(event.UIElementShown(Component.this))
-
-      def componentMoved(e: java.awt.event.ComponentEvent): Unit =
-        publish(event.UIElementMoved(Component.this))
-
-      def componentResized(e: java.awt.event.ComponentEvent): Unit =
-        publish(event.UIElementResized(Component.this))
-    })
 
     peer.addFocusListener(new java.awt.event.FocusListener {
       def other(e: java.awt.event.FocusEvent): Option[Component] = e.getOppositeComponent match {

src/main/scala/scala/swing/FileChooser.scala

@@ -46,9 +46,9 @@ object FileChooser {
  *
  * @see  [[http://docs.oracle.com/javase/7/docs/api/javax/swing/JFileChooser.html javax.swing.JFileChooser]]
  */
-class FileChooser(dir: File) {
+class FileChooser(dir: File) extends Component {
   import scala.swing.FileChooser._
-  lazy val peer: JFileChooser = new JFileChooser(dir)
+  override lazy val peer: JFileChooser = new JFileChooser(dir)
 
   def this() = this(null)
 

src/main/scala/scala/swing/FlowPanel.scala

@@ -43,8 +43,12 @@ class FlowPanel(alignment: FlowPanel.Alignment.Value)(contents0: Component*) ext
 
   private def layoutManager: FlowLayout = peer.getLayout.asInstanceOf[FlowLayout]
 
-  def vGap: Int = layoutManager.getVgap
-  def vGap_=(n: Int): Unit = layoutManager.setVgap(n)
-  def hGap: Int = layoutManager.getHgap
-  def hGap_=(n: Int): Unit = layoutManager.setHgap(n)
+  def vGap    : Int         = layoutManager.getVgap
+  def vGap_=(n: Int): Unit  = layoutManager.setVgap(n)
+
+  def hGap    : Int         = layoutManager.getHgap
+  def hGap_=(n: Int): Unit  = layoutManager.setHgap(n)
+
+  def alignOnBaseline         : Boolean         = layoutManager.getAlignOnBaseline
+  def alignOnBaseline_=(value : Boolean): Unit  = layoutManager.setAlignOnBaseline(value)
 }

src/main/scala/scala/swing/PopupMenu.scala

@@ -59,7 +59,13 @@ class PopupMenu extends Component with SequentialContainer.Wrapper with Publishe
   def show(invoker: Component, x: Int, y: Int): Unit = peer.show(invoker.peer, x, y)
 
   def margin: Insets = peer.getMargin
+
   def label: String = peer.getLabel
   def label_=(s: String): Unit = peer.setLabel(s)
+
+  /** Lays out the popup menu so that it uses the minimum space
+    * needed to display its contents.
+    */
+  def pack(): Unit = peer.pack()
 }
 

src/main/scala/scala/swing/SplitPane.scala

@@ -17,54 +17,69 @@ import javax.swing.JSplitPane
 import scala.collection.immutable
 import scala.swing.Swing.nullPeer
 
-/**
- * A container with exactly two children. Arranges them side by side, either
- * horizontally or vertically. Displays a draggable divider component between
- * them that lets the user adjust the size ratio of the children.
- *
- * @see javax.swing.JSplitPane
- */
-class SplitPane(o: Orientation.Value, left: Component, right: Component) extends Component with Container with Orientable.Wrapper {
-  override lazy val peer: JSplitPane =
-    new javax.swing.JSplitPane(o.id, left.peer, right.peer) with SuperMixin
+/** A container with exactly two children. Arranges them side by side, either
+  * horizontally or vertically. Displays a draggable divider component between
+  * them that lets the user adjust the size ratio of the children.
+  *
+  * @param  o the orientation of the divider. Note that we are using
+  *           `Orientation.Horizontal` and `Orientation.Vertical`, which are
+  *           different from the underlying `JSplitPane` values.
+  *           `Orientation.Horizontal` corresponds with `VERTICAL_SPLIT`, thus
+  *           producing a left and right component and a "vertical divider",
+  *           and `Orientation.Vertical` corresponds with `HORIZONTAL_SPLIT`, thus
+  *           producing a top and bottom component and a "horizontal divider".
+  *
+  * @see javax.swing.JSplitPane
+  */
+class SplitPane(o: Orientation.Value, left: Component, right: Component)
+  extends Component with Container with Orientable.Wrapper {
+
   def this(o: Orientation.Value) = this(o, new Component {}, new Component {})
   def this() = this(Orientation.Horizontal)
 
+  override lazy val peer: JSplitPane =
+    new javax.swing.JSplitPane(o.id, left.peer, right.peer) with SuperMixin
+
   def contents: immutable.Seq[Component] = List(leftComponent, rightComponent)
+
   def contents_=(left: Component, right: Component): Unit = {
-    peer.setLeftComponent(nullPeer(left))
+    peer.setLeftComponent (nullPeer(left))
     peer.setRightComponent(nullPeer(right))
   }
 
   def topComponent: Component =
     UIElement.cachedWrapper[Component](peer.getTopComponent.asInstanceOf[javax.swing.JComponent])
   def topComponent_=(c: Component): Unit = peer.setTopComponent(nullPeer(c))
+
   def bottomComponent: Component =
     UIElement.cachedWrapper[Component](peer.getBottomComponent.asInstanceOf[javax.swing.JComponent])
   def bottomComponent_=(c: Component): Unit = peer.setBottomComponent(nullPeer(c))
 
-  def leftComponent: Component = topComponent
-  def leftComponent_=(c: Component): Unit = { topComponent = c }
-  def rightComponent: Component = bottomComponent
-  def rightComponent_=(c: Component): Unit = { bottomComponent = c }
+  def leftComponent     : Component         =   topComponent
+  def leftComponent_= (c: Component): Unit  = { topComponent = c }
 
-  def dividerLocation: Int = peer.getDividerLocation
-  def dividerLocation_=(n: Int): Unit = peer.setDividerLocation(n)
+  def rightComponent    : Component         =   bottomComponent
+  def rightComponent_=(c: Component): Unit  = { bottomComponent = c }
+
+  def dividerLocation       : Int             = peer.getDividerLocation
+  def dividerLocation_=   (n: Int): Unit      = peer.setDividerLocation(n)
 
   /*def proportionalDividerLocation: Double =
     if (orientation == Orientation.Vertical) dividerLocation / (size.height - dividerSize)
     else dividerLocation / (size.width - dividerSize)*/
   def dividerLocation_=(f: Double): Unit = peer.setDividerLocation(f)
 
-  def dividerSize: Int = peer.getDividerSize
-  def dividerSize_=(n: Int): Unit = peer.setDividerSize(n)
-  def resizeWeight: Double = peer.getResizeWeight
-  def resizeWeight_=(n: Double): Unit = peer.setResizeWeight(n)
+  def dividerSize           : Int             = peer.getDividerSize
+  def dividerSize_=       (n: Int): Unit      = peer.setDividerSize(n)
+
+  def resizeWeight          : Double          = peer.getResizeWeight
+  def resizeWeight_=      (n: Double): Unit   = peer.setResizeWeight(n)
 
   def resetToPreferredSizes(): Unit = peer.resetToPreferredSizes()
 
-  def oneTouchExpandable: Boolean = peer.isOneTouchExpandable
-  def oneTouchExpandable_=(b: Boolean): Unit = peer.setOneTouchExpandable(b)
-  def continuousLayout: Boolean = peer.isContinuousLayout
-  def continuousLayout_=(b: Boolean): Unit = peer.setContinuousLayout(b)
+  def oneTouchExpandable    : Boolean         = peer.isOneTouchExpandable
+  def oneTouchExpandable_=(b: Boolean): Unit  = peer.setOneTouchExpandable(b)
+
+  def continuousLayout      : Boolean         = peer.isContinuousLayout
+  def continuousLayout_=  (b: Boolean): Unit  = peer.setContinuousLayout(b)
 }

src/test/scala/scala/swing/Issue97.scala

@@ -0,0 +1,64 @@
+package scala.swing
+
+import java.util.concurrent.TimeUnit
+
+import org.scalatest.{FlatSpec, Matchers}
+
+import scala.concurrent.duration.Duration
+import scala.concurrent.{Await, Future, Promise}
+import scala.swing.event.{UIElementHidden, UIElementMoved, UIElementResized, UIElementShown}
+import scala.util.control.NonFatal
+
+// Note: `AsyncFlatSpec` has issues with swallowing errors and returning early.
+class Issue97 extends FlatSpec with Matchers {
+  case class Count(shown: Int = 0, hidden: Int = 0, moved: Int = 0, resized: Int = 0)
+
+  def countEvents(): Future[Count] = {
+    val p = Promise[Count]()
+
+    def safely(thunk: => Unit): Unit =
+      try {
+        thunk
+      } catch {
+        case NonFatal(ex) =>
+          p.tryFailure(ex)
+      }
+
+    Swing.onEDT {
+      safely {
+        var c = Count()
+        val lb = new Label("Foo")
+        lb.listenTo(lb)
+        lb.reactions += {
+          case UIElementShown   (`lb`) => c = c.copy(shown    = c.shown   + 1)
+          case UIElementHidden  (`lb`) => c = c.copy(hidden   = c.hidden  + 1)
+          case UIElementMoved   (`lb`) => c = c.copy(moved    = c.moved   + 1)
+          case UIElementResized (`lb`) => c = c.copy(resized  = c.resized + 1)
+        }
+        val b = new BoxPanel(Orientation.Horizontal)
+        b.contents += lb
+        lb.visible = false
+        lb.visible = true
+        b.contents.insert(0, new Label("Bar"))  // about to move `lb` to the right
+        b.peer.doLayout()
+        // note: `Frame#pack()` creates a native window peer,
+        // and thus is not possible to run on Travis without X11
+
+        // wait till next EDT cycle
+        Swing.onEDT {
+          p.trySuccess(c)
+        }
+      }
+    }
+    p.future
+  }
+
+  "Components" should "fire exactly one event when moved, removed or made visible or invisible" in {
+    val futCount = countEvents()
+    val c = Await.result(futCount, Duration(20, TimeUnit.SECONDS))
+    assert(c.shown    === 1)
+    assert(c.hidden   === 1)
+    assert(c.moved    === 1)
+    assert(c.resized  === 1)
+  }
+}