scalafx 和 TableView：如何更改 slectionModel 和 focusModel？

Question

我想在 scalafx 中使用 TableView 在我的 GUI 中有一个漂亮的 table，用户可以在其中查看和输入数据。我想使用类 TableViewSelectionModel 和 TableViewFocusModel 中的一些不错的方法，例如 selectionMode、selectedCells 和 selectBelowCell来自 TableViewSelectionModel 或 focus(pos)、focusedCell 和 focusBelowCell 来自 TableViewFocusModel.

我有以下示例，主要来自 Mark Lewis 的 YouTube 视频（顺便说一下，他为 scala 和 scalafx 制作了优秀的学习视频，但不包括这个主题）：

import scalafx.Includes._
import scalafx.application.JFXApp
import scalafx.beans.property.{ObjectProperty, StringProperty}
import scalafx.collections.ObservableBuffer
import scalafx.scene.Scene
import scalafx.scene.control.cell.TextFieldTableCell
import scalafx.scene.control.{TableColumn, TableView}
import scalafx.util.converter.DefaultStringConverter

object Main extends JFXApp {

  case class Student(name: String, test1: Int, test2: Int)

  val data = new ObservableBuffer[Student]()
  data ++= List(Student("Jane Doe", 99, 93), Student("John Doe", 73, 88), Student("Bob Builder", 85, 91))

  stage = new JFXApp.PrimaryStage {
    title = "Test for Table View"
    resizable = true
    width = 1000
    height = 800

    val table: TableView[Student] = new TableView[Student](data) {
      editable = true
      //selectionModel = TableView.TableViewSelectionModel[Tables.Student] ???
      //focusModel = TableView.TableViewFocusModel[Tables.Student] ???
    }

    println("selection model: " + table.selectionModel)
    println("focus model: " + table.focusModel)

    val col1: TableColumn[Student, String] = new TableColumn[Student, String] {
      text = "Name"
      editable = true
      cellValueFactory = { cdf: TableColumn.CellDataFeatures[Student, String] => StringProperty(cdf.value.name) }
      cellFactory = (_: TableColumn[Student, String]) => new TextFieldTableCell[Student, String](new DefaultStringConverter())
    }

    val col2: TableColumn[Student, Int] = new TableColumn[Student, Int] {
      text = "Test 1"
      editable = true
      cellValueFactory = { cdf => ObjectProperty(cdf.value.test1) }

    }

    val col3: TableColumn[Student, Int] = new TableColumn[Student, Int] {
      text = "Test 2"
      editable = true
      cellValueFactory = { cdf => ObjectProperty(cdf.value.test2) }

    }
    val col4: TableColumn[Student, Double] = new TableColumn[Student, Double] {
      text = "Average"
      cellValueFactory = { cdf => ObjectProperty((cdf.value.test1 + cdf.value.test2) / 2.0) }
    }

    val col5: TableColumn[Student, String] = new TableColumn[Student, String] {
      text = "Test-Input"
      editable = true
      cellFactory = (_: TableColumn[Student, String]) => { new TextFieldTableCell[Student, String](new DefaultStringConverter())

      }

    }

    table.columns ++= List(col1, col2, col3, col4, col5)


    scene = new Scene {
      root = table
    }
  }
}

我的问题是我不知道 java 或 javaFX。我试图从 javaFX 文档中获取信息，但这并没有多大帮助。例如，javaFX 有一个方法 tables .setSelectionMode(SelectionMode.MULTIPLE); 设置选择模式，但我如何在 scalafx 中执行此操作？

如果有人可以修改上面的代码，这将对我有所帮助，以便选择单个单元格而不是整行。我很确定我可以自己解决剩下的问题。

P.S.: 我用 sbt 版本 1.2.8 编译了上面的代码，我的 build.sbt 文件是：

name := "TestTableView"
scalaVersion := "2.13.5"
// Scala FX
libraryDependencies += "org.scalafx" %% "scalafx" % "15.0.1-R21"
libraryDependencies += "org.scala-lang.modules" %% "scala-xml" % "1.2.0"
libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.3"
fork := true
// Tell Javac and scalac for which jvm it has to build (not really necessary)
javacOptions ++= Seq("-source", "1.8", "-target", "1.8")
scalacOptions += "-target:jvm-1.8"
scalacOptions += "-feature"

Answer 1

解决了错误高亮的问题，解决方法很简单。仅供参考，这里是上面的代码，修改了所有要求的 TableView 选项：

import scalafx.Includes._
import scalafx.application.JFXApp
import scalafx.beans.property.{ObjectProperty, StringProperty}
import scalafx.collections.ObservableBuffer
import scalafx.scene.Scene
import scalafx.scene.control.SelectionMode.Multiple
import scalafx.scene.control.cell.TextFieldTableCell
import scalafx.scene.control.{TableColumn, TableView}
import scalafx.util.converter.DefaultStringConverter

object Main extends JFXApp {

  case class Student(name: String, test1: Int, test2: Int)

  val data = new ObservableBuffer[Student]()
  data ++= List(Student("Jane Doe", 99, 93), Student("John Doe", 73, 88), Student("Bob Builder", 85, 91))

  stage = new JFXApp.PrimaryStage {
    title = "Test for Table View"
    resizable = true
    width = 1000
    height = 800

    val table: TableView[Student] = new TableView[Student](data) {
      editable = true
      selectionModel.apply.cellSelectionEnabled = true
      selectionModel().selectionMode = Multiple  //Choose between Single and Multiple
      selectionModel.apply.selectedItem.onChange {
        println("Selected" + selectionModel.apply.getSelectedItem)
        println("Selected row-Index: " + selectionModel.apply.selectedIndex.value)
        println("Selected cells: " + table.selectionModel().selectedCells)
        println("Focused Cell: " + table.focusModel().focusedCell)
      }
    }

    val col1: TableColumn[Student, String] = new TableColumn[Student, String] {
      text = "Name"
      editable = true
      cellValueFactory = { cdf: TableColumn.CellDataFeatures[Student, String] => StringProperty(cdf.value.name) }
      cellFactory = (_: TableColumn[Student, String]) => new TextFieldTableCell[Student, String](new DefaultStringConverter())
    }

    val col2: TableColumn[Student, Int] = new TableColumn[Student, Int] {
      text = "Test 1"
      editable = true
      cellValueFactory = { cdf: TableColumn.CellDataFeatures[Student, Int] => ObjectProperty(cdf.value.test1) }
      //cellFactory = (_: TableColumn[Student, String]) => new TextFieldTableCell[Student, String](new DefaultStringConverter())
    }

    val col3: TableColumn[Student, Int] = new TableColumn[Student, Int] {
      text = "Test 2"
      editable = true
      cellValueFactory = { cdf => ObjectProperty(cdf.value.test2) }

    }
    val col4: TableColumn[Student, Double] = new TableColumn[Student, Double] {
      text = "Average"
      cellValueFactory = { cdf => ObjectProperty((cdf.value.test1 + cdf.value.test2) / 2.0) }
    }

    val col5: TableColumn[Student, String] = new TableColumn[Student, String] {
      text = "Test-Input"
      editable = true
      cellFactory = (_: TableColumn[Student, String]) => {
        new TextFieldTableCell[Student, String](new DefaultStringConverter())
      }
    }
    table.columns ++= List(col1, col2, col3, col4, col5)

    table.requestFocus()
    table.selectionModel().select(1, col1)          //Select 2'nd (count starts at 0) cell in col2, that is Test1
    table.focusModel().focus(1, col1)               //Set focus on
    table.edit(1, col1)                             //wander what this is doing
    table.selectionModel().selectBelowCell()        //Selects the cell below
    table.focusModel().focusBelowCell()             //Focuses on the cell below

    scene = new Scene {
      root = table
    }
  }

scalafx 和 TableView：如何更改 slectionModel 和 focusModel？

scalafx and TableView: how do I change slectionModel and focusModel?

scala

controls

scalafx