Swing/ScrollingCellEditor のバックアップ(No.13)

class TextAreaCellEditor extends JTextArea implements TableCellEditor {
  private static final String KEY = "Stop-Cell-Editing";
  protected transient ChangeEvent changeEvent;
  private final JScrollPane scroll;

  protected TextAreaCellEditor() {
    super();
    scroll = new JScrollPane(this);
    scroll.setBorder(BorderFactory.createEmptyBorder());
    // scroll.setViewportBorder(BorderFactory.createEmptyBorder());

    setLineWrap(true);
    setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));

    KeyStroke enter = KeyStroke.getKeyStroke(
        KeyEvent.VK_ENTER, InputEvent.CTRL_DOWN_MASK);
    getInputMap(JComponent.WHEN_FOCUSED).put(enter, KEY);
    getActionMap().put(KEY, new AbstractAction() {
      @Override public void actionPerformed(ActionEvent e) {
        stopCellEditing();
      }
    });
  }

  @Override public Object getCellEditorValue() {
    return getText();
  }

  @Override public Component getTableCellEditorComponent(
      JTable table, Object value, boolean isSelected, int row, int column) {
    System.out.println("getTableCellEditorComponent");
    setFont(table.getFont());
    setText(Objects.toString(value, ""));
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        setCaretPosition(getText().length());
        requestFocusInWindow();
        System.out.println("invokeLater: getTableCellEditorComponent");
      }
    });
    return scroll;
  }

  @Override public boolean isCellEditable(final EventObject e) {
    if (e instanceof MouseEvent) {
      return ((MouseEvent) e).getClickCount() >= 2;
    }
    System.out.println("isCellEditable");
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        if (e instanceof KeyEvent) {
          KeyEvent ke = (KeyEvent) e;
          char kc = ke.getKeyChar();
          if (Character.isUnicodeIdentifierStart(kc)) {
            setText(getText() + kc);
            System.out.println("invokeLater: isCellEditable");
          }
        }
      }
    });
    return true;
  }
  // ...
}