#170: fixes current element selection

app/src/main/scala/app/logorrr/util/JfxUtils.scala

@@ -8,10 +8,10 @@ import javafx.stage.{Stage, WindowEvent}
 object JfxUtils extends CanLog {
 
   def execOnUiThread(f: => Unit): Unit = {
-    if (!Platform.isFxApplicationThread) {
-      Platform.runLater(() => f)
-    } else {
+    if (Platform.isFxApplicationThread) {
       f
+    } else {
+      Platform.runLater(() => f)
     }
   }
 

app/src/main/scala/app/logorrr/views/block/BlockImage.scala

@@ -17,7 +17,11 @@ object BlockImage {
   /** defines how many table cells should be rendered per list height */
   val DefaultBlocksPerPage = 4
 
-  def indexOf(x: Int, y: Int, blockWidth: Int, blockViewWidth: Int): Int = y / blockWidth * (blockViewWidth / blockWidth) + x / blockWidth
+  // assuming we have a grid of rectangles, and x and y give the coordinate of a mouse click
+  // this function should return the correct index for the surrounding rectangle
+  def indexOf(x: Int, y: Int, blockWidth: Int, blockViewWidth: Int): Int = {
+    y / blockWidth * (blockViewWidth / blockWidth) + x / blockWidth
+  }
 
   /**
    * Calculates overall height of virtual canvas

app/src/main/scala/app/logorrr/views/block/ChunkListCell.scala

@@ -8,7 +8,7 @@ import javafx.collections.ObservableList
 import javafx.event.EventHandler
 import javafx.scene.control.ListCell
 import javafx.scene.image.ImageView
-import javafx.scene.input.MouseEvent
+import javafx.scene.input.{MouseButton, MouseEvent}
 
 import scala.util.Try
 
@@ -25,17 +25,24 @@ class ChunkListCell(selectedLineNumberProperty: SimpleIntegerProperty
                     , widthProperty: ReadOnlyDoubleProperty
                     , blockSizeProperty: SimpleIntegerProperty
                     , filtersProperty: ObservableList[Filter]
+                    , selectInTextView: LogEntry => Unit
                    ) extends ListCell[Chunk] with CanLog {
 
   // if user selects an entry in the ChunkListView set selectedLineNumberProperty. This property is observed
   // via an listener and a yellow square will be painted.
   val mouseEventHandler = new EventHandler[MouseEvent]() {
     override def handle(me: MouseEvent): Unit = {
-      val index = BlockImage.indexOf(me.getX.toInt, me.getY.toInt, blockSizeProperty.get, widthProperty.get.toInt)
-      getEntryAt(getItem, index) match {
-        case Some(value) =>
-          selectedLineNumberProperty.set(value.lineNumber)
-        case None => System.err.println("no element found")
+      // on left mouse button
+      if (me.getButton.equals(MouseButton.PRIMARY)) {
+        val index = BlockImage.indexOf(me.getX.toInt, me.getY.toInt, blockSizeProperty.get, widthProperty.get.toInt)
+        getEntryAt(getItem, index) match {
+          case Some(value) =>
+            // set selected property such that the next repaint will highlight this entry
+            selectedLineNumberProperty.set(value.lineNumber)
+            // we have to select also the entry in the LogTextView, couldn't get it to work with bindings / listeners
+            selectInTextView(value)
+          case None => System.err.println("no element found")
+        }
       }
     }
   }

app/src/main/scala/app/logorrr/views/block/ChunkListView.scala

@@ -15,12 +15,15 @@ import scala.util.{Failure, Success, Try}
 object ChunkListView {
 
   def apply(entries: ObservableList[LogEntry]
-            , settings: MutLogFileSettings): ChunkListView = {
+            , settings: MutLogFileSettings
+            , selectInTextView: LogEntry => Unit
+           ): ChunkListView = {
     new ChunkListView(entries
       , settings.selectedLineNumberProperty
       , settings.blockSizeProperty
       , settings.filtersProperty
-      , settings.dividerPositionProperty)
+      , settings.dividerPositionProperty
+      , selectInTextView)
   }
 }
 
@@ -40,7 +43,8 @@ class ChunkListView(val entries: ObservableList[LogEntry]
                     , val selectedLineNumberProperty: SimpleIntegerProperty
                     , val blockSizeProperty: SimpleIntegerProperty
                     , val filtersProperty: ObservableList[Filter]
-                    , val dividersProperty: SimpleDoubleProperty)
+                    , val dividersProperty: SimpleDoubleProperty
+                    , selectInTextView: LogEntry => Unit)
   extends ListView[Chunk] with CanLog {
 
   var repaints = 0
@@ -73,11 +77,11 @@ class ChunkListView(val entries: ObservableList[LogEntry]
 
   getStylesheets.add(getClass.getResource("/app/logorrr/ChunkListView.css").toExternalForm)
 
-  setCellFactory((lv: ListView[Chunk]) => new ChunkListCell(
-    selectedLineNumberProperty
+  setCellFactory((lv: ListView[Chunk]) => new ChunkListCell(selectedLineNumberProperty
     , lv.widthProperty()
     , blockSizeProperty
-    , filtersProperty))
+    , filtersProperty
+    , selectInTextView))
 
 
   // if width/height of display is changed, also elements of this listview will change

app/src/main/scala/app/logorrr/views/block/LPixelBuffer.scala

@@ -76,18 +76,18 @@ case class LPixelBuffer(blockNumber: Int
     , IntBuffer.wrap(rawInts)
     , PixelFormat.getIntArgbPreInstance) with CanLog {
 
-  val name = s"${range.start}_${range.end}"
-
-  getBuffer.clear()
-
-  assert(shape.width != 0, s"For $name, width was ${shape.width}.")
-  assert(shape.height != 0, s"For $name, height was ${shape.height}.")
-  assert(shape.height * shape.width > 0)
-
+  private val name = s"${range.start}_${range.end}"
   private val bgColor: Int = ColorUtil.toARGB(Color.WHITE)
   lazy val background: Array[Int] = Array.fill(shape.area)(bgColor)
 
-  paint()
+  init()
+
+  def init(): Unit = {
+    assert(shape.width != 0, s"For $name, width was ${shape.width}.")
+    assert(shape.height != 0, s"For $name, height was ${shape.height}.")
+    assert(shape.height * shape.width > 0)
+    paint()
+  }
 
   private def cleanBackground(): Unit = System.arraycopy(background, 0, rawInts, 0, background.length)
 
@@ -96,46 +96,23 @@ case class LPixelBuffer(blockNumber: Int
   def filters = Option(filtersProperty).map(_.asScala.toSeq).getOrElse(Seq())
 
   // todo check visibility
-  def paint(): Unit = {
-    if (blockSize != 0) {
-      if (Option(filtersProperty).isEmpty) {
-        logWarn("filters is null")
-      } else {
-        JfxUtils.execOnUiThread(
-          updateBuffer((_: PixelBuffer[IntBuffer]) => {
-            cleanBackground()
-            var i = 0
-            entries.forEach(e => {
-              if (e.lineNumber.equals(selectedLineNumberProperty.getValue() + 1)) {
-                LPixelBuffer.drawRect(rawInts, i, shape.width, blockSize, Color.YELLOW)
-              } else {
-                // LPixelBuffer.drawRect(rawInts, i, width, blockSize, blockColor)
-                LPixelBuffer.drawRect(rawInts, i, shape.width, blockSize, Filter.calcColor(e.value, filters))
-                //LPixelBuffer.drawRect(rawInts, i, shape.width.toInt, blockSize, ColorUtil.randColor)
-              }
-              i = i + 1
-            })
-            shape
-          }))
-      }
-    } else {
-      logWarn(s"getBlockWidth() = $blockSize")
-    }
-  }
-
-
-  /**
-   * draws a filled rectangle on the given index
-   */
-  def draw(index: Int, color: Color): Unit = {
+  private def paint(): Unit = {
     if (blockSize != 0) {
-      paint()
       updateBuffer((_: PixelBuffer[IntBuffer]) => {
-        // drawRect(e.lineNumber - 1, Filter.calcColor(e.value, filtersProperty.asScala.toSeq).darker().darker())
-        LPixelBuffer.drawRect(rawInts, index, shape.width.toInt, blockSize, color)
+        cleanBackground()
+        var i = 0
+        entries.forEach(e => {
+          if (e.lineNumber.equals(selectedLineNumberProperty.getValue())) {
+            LPixelBuffer.drawRect(rawInts, i, shape.width, blockSize, Color.YELLOW)
+          } else {
+            LPixelBuffer.drawRect(rawInts, i, shape.width, blockSize, Filter.calcColor(e.value, filters))
+          }
+          i = i + 1
+        })
         shape
       })
     }
   }
 
+
 }

app/src/main/scala/app/logorrr/views/logfiletab/LogFileTab.scala

@@ -84,10 +84,13 @@ class LogFileTab(val pathAsString: String
     op
   }
 
-  private val chunkListView = ChunkListView(filteredList, mutLogFileSettings)
-
+  // display text to the right
   private val logTextView = new LogTextView(mutLogFileSettings, filteredList)
 
+  // graphical display to the left
+  private val chunkListView = ChunkListView(filteredList, mutLogFileSettings, logTextView.selectLogEntry)
+
+
   // start listener declarations
   private lazy val scrollToEndEventListener: InvalidationListener = (_: Observable) => {
     chunkListView.scrollTo(chunkListView.getItems.size())

app/src/main/scala/app/logorrr/views/text/LogTextView.scala

@@ -2,7 +2,7 @@ package app.logorrr.views.text
 
 import app.logorrr.conf.mut.MutLogFileSettings
 import app.logorrr.model.LogEntry
-import app.logorrr.util.{CanLog, ClipBoardUtils, JfxUtils}
+import app.logorrr.util.{CanLog, JfxUtils}
 import javafx.beans.value.ChangeListener
 import javafx.collections.transformation.FilteredList
 import javafx.scene.control._
@@ -23,42 +23,33 @@ object LogTextView {
 
 class LogTextView(mutLogFileSettings: MutLogFileSettings
                   , filteredList: FilteredList[LogEntry]) extends ListView[LogEntry] with CanLog {
-  /** 'pragmatic way' to determine width of max elems in this view */
-  val maxLength: Int = filteredList.size().toString.length
-
-
-  private val selectedLineNumberListener: ChangeListener[Number] = JfxUtils.onNew((n: Number) => {
-    Option(getItems.filtered((t: LogEntry) => t.lineNumber == n.intValue()).get(0)) match {
-      case Some(value) =>
-        val relativeIndex = getItems.indexOf(value)
-        getSelectionModel.select(relativeIndex)
-        scrollTo(relativeIndex - ((getHeight / LogTextView.fixedCellSize) / 2).toInt)
-      case None =>
-    }
-  })
 
   init()
 
-  /**
-   *
-   */
   def init(): Unit = {
     getStyleClass.add("dense")
     setItems(filteredList)
-    val i = mutLogFileSettings.selectedLineNumberProperty.get()
-    getSelectionModel.select(i)
+    getSelectionModel.select(mutLogFileSettings.selectedLineNumberProperty.get())
 
-    getSelectionModel.selectedIndexProperty().addListener(JfxUtils.onNew({ i: Number => {
-      mutLogFileSettings.selectedLineNumberProperty.removeListener(selectedLineNumberListener)
-      mutLogFileSettings.setSelectedLineNumber(i.intValue())
-      mutLogFileSettings.selectedLineNumberProperty.addListener(selectedLineNumberListener)
-    }
-    }))
+    getSelectionModel.selectedItemProperty().addListener(JfxUtils.onNew[LogEntry](e => mutLogFileSettings.setSelectedLineNumber(e.lineNumber)))
     setCellFactory((_: ListView[LogEntry]) => new LogEntryListCell())
-    mutLogFileSettings.selectedLineNumberProperty.addListener(selectedLineNumberListener)
 
   }
 
+  /** 'pragmatic way' to determine width of max elems in this view */
+  def maxLength: Int = filteredList.size().toString.length
+
+  def selectLogEntry(logEntry: LogEntry): Unit = {
+    getSelectionModel.select(logEntry)
+    val relativeIndex = getItems.indexOf(logEntry)
+    getSelectionModel.select(relativeIndex)
+    val cellHeight = lookup(".list-cell").getBoundsInLocal.getHeight
+    val visibleItemCount = (getHeight / cellHeight).asInstanceOf[Int]
+    val idx = if (relativeIndex - visibleItemCount / 2 <= 0) 0 else relativeIndex - visibleItemCount / 2
+    scrollTo(idx)
+  }
+
+
   class LogEntryListCell extends ListCell[LogEntry] {
     styleProperty().bind(mutLogFileSettings.fontStyleBinding)
     setGraphic(null)

app/src/test/scala/app/logorrr/views/block/BlockImageSpec.scala

@@ -4,6 +4,15 @@ import org.scalatest.wordspec.AnyWordSpec
 
 class BlockImageSpec extends AnyWordSpec {
 
+  "BlockImage.indexOf" should {
+    ".a" in assert(BlockImage.indexOf(0, 0, 100, 1000) == 0)
+    ".b" in assert(BlockImage.indexOf(0, 0, 10, 100) == 0)
+    ".c" in assert(BlockImage.indexOf(11, 0, 10, 100) == 1)
+    ".d" in assert(BlockImage.indexOf(99, 0, 10, 100) == 9)
+    ".f" in assert(BlockImage.indexOf(0, 11, 10, 100) == 10)
+    ".e" in assert(BlockImage.indexOf(99, 99, 10, 100) == 99)
+  }
+
   "BlockImage.calcVirtualHeight" should {
     "sc0" in assert(BlockImage.calcVirtualHeight(1, 7, 10, 0) == 0)
     "sc1" in assert(BlockImage.calcVirtualHeight(1, 7, 10, 1) == 7)

app/src/test/scala/app/logorrr/views/block/ChunkListTestApp.scala

@@ -55,7 +55,8 @@ class ChunkListTestApp extends Application with CanLog {
       , new SimpleIntegerProperty(selectedLineNumber)
       , new SimpleIntegerProperty(blockSize)
       , filtersProperty
-      , new SimpleDoubleProperty(dividerPosition))
+      , new SimpleDoubleProperty(dividerPosition)
+      , e => ())
     clv.addListeners()
     val sp = new SplitPane(clv, new BorderPane(new Label("Test")))