Swing/TableHeaderCheckBox のバックアップの現在との差分(No.8)

JTableHeaderにJCheckBoxを追加してセルの値を切り替える

サンプルコード

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* サンプルコード [#sourcecode]
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#code(link){{
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enum Status { SELECTED, DESELECTED, INDETERMINATE }
class HeaderRenderer extends JCheckBox implements TableCellRenderer {
  public HeaderRenderer(JTableHeader header, final int targetColumnIndex) {
    super();
  private final JLabel label = new JLabel("Check All");
  private final int targetColumnIndex;
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  public HeaderRenderer(JTableHeader header, int index) {
    super((String) null);
    this.targetColumnIndex = index;
    setOpaque(false);
    setFont(header.getFont());
    header.addMouseListener(new MouseAdapter() {
      @Override public void mouseClicked(MouseEvent e) {
        JTableHeader header = (JTableHeader)e.getSource();
        JTableHeader header = (JTableHeader) e.getComponent();
        JTable table = header.getTable();
        TableColumnModel columnModel = table.getColumnModel();
        int vci = columnModel.getColumnIndexAtX(e.getX());
        int mci = table.convertColumnIndexToModel(vci);
        if(mci == targetColumnIndex) {
        if (mci == targetColumnIndex) {
          TableColumn column = columnModel.getColumn(vci);
          Object v = column.getHeaderValue();
          boolean b = Status.DESELECTED.equals(v)?true:false;
          boolean b = column.getHeaderValue() == Status.DESELECTED;
          TableModel m = table.getModel();
          for(int i=0; i<m.getRowCount(); i++) m.setValueAt(b, i, mci);
          column.setHeaderValue(b?Status.SELECTED:Status.DESELECTED);
          header.repaint();
          for (int i = 0; i < m.getRowCount(); i++) {
            m.setValueAt(b, i, mci);
          }
          column.setHeaderValue(b ? Status.SELECTED : Status.DESELECTED);
          // header.repaint();
        }
      }
    });
  }
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  @Override public Component getTableCellRendererComponent(
      JTable tbl, Object val, boolean isS, boolean hasF, int row, int col) {
        JTable tbl, Object val, boolean isS, boolean hasF, int row, int col) {
    TableCellRenderer r = tbl.getTableHeader().getDefaultRenderer();
    JLabel l =(JLabel)r.getTableCellRendererComponent(tbl,"Check All",isS,hasF,row,col);
    if(val instanceof Status) {
      switch((Status)val) {
        case SELECTED:    setSelected(true);  setEnabled(true);  break;
        case DESELECTED:  setSelected(false); setEnabled(true);  break;
        case INDETERMINATE: setSelected(true);  setEnabled(false); break;
    JLabel l = (JLabel) r.getTableCellRendererComponent(tbl, val, isS, hasF, row, col);
    if (targetColumnIndex == tbl.convertColumnIndexToModel(col)) {
      if (val instanceof Status) {
        switch ((Status) val) {
        case SELECTED:
          setSelected(true);
          setEnabled(true);
          break;
        case DESELECTED:
          setSelected(false);
          setEnabled(true);
          break;
        case INDETERMINATE:
          setSelected(true);
          setEnabled(false);
          break;
        default:
          throw new AssertionError("Unknown Status");
        }
      } else {
        setSelected(true);
        setEnabled(false);
      }
    }else{
      setSelected(true); setEnabled(false);
      label.setIcon(new ComponentIcon(this));
      l.setIcon(new ComponentIcon(label));
      l.setText(null);
    }
    l.setIcon(new CheckBoxIcon(this));
    if(l.getPreferredSize().height>1000) { //XXX: Nimbus
      System.out.println(l.getPreferredSize().height);
      l.setPreferredSize(new Dimension(0, 28));
    }
    return l;
  }
}
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class CheckBoxIcon implements Icon{
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  private final JCheckBox check;
  public CheckBoxIcon(JCheckBox check) {
    this.check = check;
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class ComponentIcon implements Icon {
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  private final JComponent cmp;
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  public ComponentIcon(JComponent cmp) {
    this.cmp = cmp;
  }
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  @Override public int getIconWidth() {
    return check.getPreferredSize().width;
    return cmp.getPreferredSize().width;
  }
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  @Override public int getIconHeight() {
    return check.getPreferredSize().height;
    return cmp.getPreferredSize().height;
  }
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  @Override public void paintIcon(Component c, Graphics g, int x, int y) {
    SwingUtilities.paintComponent(
        g, check, (Container)c, x, y, getIconWidth(), getIconHeight());
        g, cmp, c.getParent(), x, y, getIconWidth(), getIconHeight());
  }
}

• JCheckBoxをアイコン化しているので、これをクリックしてもイベントは発生しない
  • 代わりにヘッダ自体にMouseListenerを追加し、マウスクリックイベントが発生するとアイコンの入れ替えることでチェック状態の表示を更新する
• LookAndFeelによってはTableCellRendererのソートアイコンと競合する場合がある

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model.addTableModelListener(new TableModelListener() {
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  @Override public void tableChanged(TableModelEvent e) {
    if(e.getType()==TableModelEvent.UPDATE && e.getColumn()==0) {
      int mci = 0;
      int vci = table.convertColumnIndexToView(mci);
      TableColumn column = table.getColumnModel().getColumn(vci);
      Object title = column.getHeaderValue();
      if(!Status.INDETERMINATE.equals(title)) {
        column.setHeaderValue(Status.INDETERMINATE);
      }else{
        int selected = 0, deselected = 0;
        TableModel m = table.getModel();
        for(int i=0; i<m.getRowCount(); i++) {
          if(Boolean.TRUE.equals(m.getValueAt(i, mci))) {
            selected++;
          }else{
            deselected++;
          }
        }
        if(selected==0) {
          column.setHeaderValue(Status.DESELECTED);
        }else if(deselected==0) {
          column.setHeaderValue(Status.SELECTED);
        }else{
          return;
        }
      }
      table.getTableHeader().repaint();
    }
  }
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});
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参考リンク

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