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

JTableのセルにJCheckBoxを表示して行背景色を変更

概要

#screenshot

サンプルコード

#spanend
#spanadd
* サンプルコード [#sourcecode]
#spanend
#spanadd
#code(link){{
#spanend
JTable table = new JTable(model) {
    @Override
    public Component prepareEditor(TableCellEditor editor, int row, int column) {
        Component cmp = super.prepareEditor(editor, row, column);
        if(convertColumnIndexToModel(column) == BOOLEAN_COLUMN) {
            //System.out.println("JTable: prepareEditor");
            JCheckBox c = (JCheckBox)cmp;
            c.setBackground(c.isSelected()? Color.ORANGE:getBackground());
        }
        return cmp;
  @Override public Component prepareEditor(
        TableCellEditor editor, int row, int column) {
    Component cmp = super.prepareEditor(editor, row, column);
    if (convertColumnIndexToModel(column) == BOOLEAN_COLUMN) {
      JCheckBox c = (JCheckBox) cmp;
      c.setBackground(c.isSelected() ? Color.ORANGE : getBackground());
    }
    @Override
    public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
        Component c = super.prepareRenderer(renderer, row, column);
        Boolean isChecked = (Boolean) model.getValueAt(
            convertRowIndexToModel(row), BOOLEAN_COLUMN);
        c.setForeground(getForeground());
        c.setBackground(isChecked? Color.ORANGE:getBackground());
        return c;
    }
    return cmp;
  }
#spanadd

#spanend
  @Override public Component prepareRenderer(
        TableCellRenderer renderer, int row, int column) {
    Component c = super.prepareRenderer(renderer, row, column);
    Boolean isChecked = (Boolean) model.getValueAt(
      convertRowIndexToModel(row), BOOLEAN_COLUMN);
    c.setForeground(getForeground());
    c.setBackground(isChecked ? Color.ORANGE : getBackground());
    return c;
  }
};

• - 以下のように、TableCellRendererやCellEditorを利用して、JTableをオーバーライドしない方法*1もあります。

• デフォルトのセルレンダラーの場合、例えばチェックボックスがクリックされてモデルが更新されるとその対応するセルのみ再描画さる
• このサンプルでは対象セルだけではなくそのセルが存在する行全体の背景色を変更しているので、TableModelListenerでモデルの更新を検出し、以下のようにJTable#repaint(...)メソッドを使って行を再描画

  #spandel
  private static JTable makeTable2(final DefaultTableModel model) {
  #spanend
      final JTable table = new JTable(model);
      TableColumnModel columns = table.getColumnModel();
      for(int i=0;i<columns.getColumnCount();i++) {
          columns.getColumn(i).setCellRenderer(new RowColorTableRenderer(
              table.getDefaultRenderer(model.getColumnClass(i))));
  #spanadd
  model.addTableModelListener(new TableModelListener() {
  #spanend
    @Override public void tableChanged(TableModelEvent e) {
      if (e.getType() == TableModelEvent.UPDATE) {
        // rowRepaint(table, table.convertRowIndexToView(e.getFirstRow()));
        Rectangle r = table.getCellRect(
            table.convertRowIndexToView(e.getFirstRow()), 0, true);
        r.width  = table.getWidth();
        // table.repaint(); // table全体をリペイントする必要はないので
        table.repaint(r);   // 一行だけリペイント
      }
      DefaultCellEditor dce = (DefaultCellEditor)table.getDefaultEditor(model.getColumnClass(BOOLEAN_COLUMN));
      final JCheckBox check = (JCheckBox)dce.getComponent();
      check.addFocusListener(new FocusAdapter() {
          @Override
          public void focusGained(FocusEvent e) {
              System.out.println("JCheckBox: focusGained");
              JCheckBox c = (JCheckBox)e.getSource();
              c.setBackground(c.isSelected()?Color.ORANGE:table.getBackground());
          }
      });
      table.addMouseListener(new MouseAdapter() {
          @Override
          public void mousePressed(MouseEvent e) {
              int col = table.columnAtPoint(e.getPoint());
              if(table.convertColumnIndexToModel(col)==BOOLEAN_COLUMN) {
                  System.out.println("JTable: mousePressed");
                  int row = table.rowAtPoint(e.getPoint());
                  Boolean isChecked = (Boolean) model.getValueAt(table.convertRowIndexToModel(row), BOOLEAN_COLUMN);
                  check.setBackground(isChecked?Color.ORANGE:table.getBackground());
              }
          }
      });
      return table;
  #spandel
  }
  #spanend
  #spandel
  static class RowColorTableRenderer implements TableCellRenderer {
  #spanend
      private final Color evenColor = new Color(240, 240, 255);
      private final TableCellRenderer renderer;
      public RowColorTableRenderer(TableCellRenderer renderer) {
          this.renderer = renderer;
      }
      public Component getTableCellRendererComponent(JTable table, Object value,
                  boolean isSelected, boolean hasFocus, int row, int column) {
          Component c = renderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
          TableModel model = table.getModel();
          Boolean isChecked = (Boolean) model.getValueAt(table.convertRowIndexToModel(row), BOOLEAN_COLUMN);
          c.setForeground(table.getForeground());
          c.setBackground(isChecked?Color.ORANGE:table.getBackground());
          return c;
      }
  #spandel
  }
  #spanend
    }
  #spanadd
  });
  #spanend
  

• Swing - JTable-Row color issue

参考リンク

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