如何更改在斯卡拉ListView的内容是什么？ [英] How do I change the contents of a ListView in Scala?

问题描述

我试图写一个小文件浏览器，我在那里显示的文件列表，并通过另一个替换列表时，我更改目录。

I'm trying to write a mini file browser, where I display a list of files, and replace the list by another when I change directories.

我可以显示一个列表：

val myList = List("Paris", "New York", "Tokyo", "Berlin", "Copenhagen")
val myListBuffer = new ListBuffer[String] ()
myListBuffer.appendAll(myList)
val myListView = new ListView(myListBuffer)
...
contents += myListView

在响应事件，我想改变显示的内容。大部分我已经试过让列表中的隐形（但向上和向下箭头仍应对选择） - 通过使他们只选择元素时，有时不可见。

In response to an event, I want to change the displayed contents. Most of what I've tried makes the list "invisible" (but still responding to selection by up and down arrows)--sometimes by making elements invisible only when they are selected!

如何更新ListView控件以反映ListBuffer的新内容？或者，可以有人点我一个这样的例子？

How do I update the ListView to reflect the new contents of the ListBuffer? Or can someone point me to an example of this?

感谢。

推荐答案

这似乎工作：

object LVTest extends SimpleSwingApplication {

  def top = new MainFrame {
    contents = myListView
    size = new Dimension(200, 200)
  }

  val myListView = new ListView[String]() {
    val myListBuffer = ListBuffer("Paris", "New York", "Tokyo", "Berlin", "Copenhagen")
    listData = myListBuffer
    listenTo(mouse.clicks)
    reactions += {
      case e: MouseClicked => {
        myListBuffer += "Slough"
        listData = myListBuffer
      }
    }
  }
}

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