Swing/BorderSeparator のバックアップの現在との差分(No.1)

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JComboBox combobox = new JComboBox();
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JSeparator sep = new JSeparator();
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ListCellRenderer lcr = combobox.getRenderer();
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combobox.setRenderer(new ListCellRenderer() {
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  @Override public Component getListCellRendererComponent(
        JList list, Object value, int index,
        boolean isSelected, boolean cellHasFocus) {
    MyItem item = (MyItem) value;
    JLabel label = (JLabel) lcr.getListCellRendererComponent(
        list, item, index, isSelected, cellHasFocus);
    if (item.hasSeparator()) {
      label.setBorder(
          BorderFactory.createMatteBorder(1, 0, 0, 0, Color.GRAY));
    } else {
      label.setBorder(BorderFactory.createEmptyBorder());
    }
    return label;
  }
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});
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DefaultComboBoxModel model = new DefaultComboBoxModel();
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model.addElement(new MyItem("aaaa"));
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model.addElement(new MyItem("eeeeeeeee", true));
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model.addElement(new MyItem("bbb12"));
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combobox.setModel(model);
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combobox.setEditable(true);
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// ...
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[[プログラム板 Java低速GUI Swing 3>http://pc8.2ch.net/test/read.cgi/tech/1121700954/]]の229さんのアイデアを参考にしています。
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class MyItem {
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  private final String  item;
  private final boolean flag;
  public MyItem(String str) {
    this(str, false);
  }

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http://terai.xrea.jp/swing/borderseparator/screenshot.png
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  public MyItem(String str, boolean flg) {
    item = str;
    flag = flg;
  }

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**サンプルコード [#x381b337]
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 public class MainPanel extends JPanel{
   private final JComboBox combobox = new JComboBox();
   public MainPanel() {
     final JSeparator sep = new JSeparator();
     final ListCellRenderer lcr = combobox.getRenderer();
     combobox.setRenderer(new ListCellRenderer() {
     public Component getListCellRendererComponent(
                    JList list, Object value, int index,
                    boolean isSelected, boolean cellHasFocus) {
       MyItem item = (MyItem)value;
       JLabel label = (JLabel)lcr.getListCellRendererComponent(
                         list,item,index,isSelected,cellHasFocus);
       if(item.hasSeparator()) {
         label.setBorder(
                BorderFactory.createMatteBorder(1,0,0,0,Color.gray));
         }else{
           label.setBorder(BorderFactory.createEmptyBorder());
         }
         return label;
       }
     });
     DefaultComboBoxModel model = new DefaultComboBoxModel();
     model.addElement(new MyItem("aaaa"));
     model.addElement(new MyItem("eeeeeeeee", true));
     model.addElement(new MyItem("bbb12"));
     combobox.setModel(model);
     
     setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
     add(new JTextField());
     add(Box.createVerticalStrut(5));
     add(combobox);
     add(Box.createRigidArea(new Dimension(320,5)));
     setBorder(BorderFactory.createEmptyBorder(5,5,0,5));
   }
   class MyItem{
     private final String  item;
     private final boolean flag;
     public MyItem(String str) {
       this(str,false);
     }
     public MyItem(String str, boolean flg) {
       item = str;
       flag = flg;
     }
     public String toString() {
       return item;
     }
     public boolean hasSeparator() {
       return flag;
     }
   }
 以下省略
  @Override public String toString() {
    return item;
  }

-[[サンプルを起動>http://terai.xrea.jp/swing/borderseparator/sample.jnlp]]
-[[jarファイル>http://terai.xrea.jp/swing/borderseparator/sample.jar]]
-[[ソース>http://terai.xrea.jp/swing/borderseparator/src.zip]]
  public boolean hasSeparator() {
    return flag;
  }
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}
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// ...
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