Java.use(better, Scala); tips343_colorList
┃アプリケーションの動作
（左）リスト項目を選択すると（右）パネルの色が変化します。
- 選択したリスト項目 blue に呼応して、パネルの背景色を再設定します。
■ AppWindow.scala
tips343_colorList/scala/src/AppWindow.scala
1: /*
2: * Copyright (c) 2010-2014, KOTSUBU-chan and/or its affiliates.
3: * Copyright (c) 1998, Atelier-AYA.
4: * All rights reserved.
5: */
6: package cherry.pie
7:
8: // ----------------------------------------
9: import swing._
10: object appWindow extends MainFrame {
11: val version = appWindow
12: .getClass.getName+": #1.0.04"
13: // ----------------------------------------
14: title = "ListView"
15: contents = TopPanel
16: peer.setLocationRelativeTo(null)
17: }
18:
19: // ----------------------------------------
20: object TopPanel extends FlowPanel {
21: _self =>
22: val controlPane = new ScrollPane {
23: preferredSize = new Dimension(100,100)
24: contents = new ListView[String](ColorMap.keys) {
25: listenTo(selection)
26: import swing.event.ListSelectionChanged
27: reactions += {
28: case ListSelectionChanged(
29: source: ListView[String], range, live) =>
30: val key = source.selection.items(0)
31: canvasPane.background = ColorMap.color(key)
32: }
33: }
34: }
35: val canvasPane = new Panel {
36: preferredSize = new Dimension(100,100)
37: }
38: new SplitPane {
39: _self.contents += this
40: contents_=(controlPane, canvasPane)
41: // leftComponent = controlPane
42: // rightComponent = canvasPane
43: orientation = Orientation.Vertical
44: dividerLocation = 100
45: }
46: }
47:
48: // ----------------------------------------
49: object ColorMap {
50: import java.awt.Color
51: val colorChart = Map(
52: "red" -> Color.red,
53: "green" -> Color.green,
54: "blue" -> Color.blue,
55: "cyan" -> Color.cyan,
56: "magenta" -> Color.magenta,
57: "yellow" -> Color.yellow,
58: "black" -> Color.black,
59: "white" -> Color.white)
60: def keys = colorChart.keys.toList sortWith { _
■ ListSelectionChanged
［28］発生したイベント ListSelectionChanged を介して
- ［29］選択したリスト項目 source にアクセスできます。
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Created: 2010/01/29｜Last updated: 2014/01/01 17:12:06
