JTable中的可滚动单元格

Question

我有一个Jtable,我必须在其中显示一些大数据.我不能增加单元格的大小所以我需要在表格的每个单元格中添加一个滚动条,通过它我可以滚动单元格的文本.

我试图添加自定义单元格渲染器

private class ExtendedTableCellEditor extends AbstractCellEditor implements TableCellEditor
{
    JLabel area = new JLabel();
    String text;

    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int rowIndex, int vColIndex)
    { 
        area.setText(text);
        return new JScrollPane(area);
        }
            public Object getCellEditorValue()
        {
        return text;
    }
}

现在,我可以在单元格上看到滚动条,但无法单击并滚动它们.

对这个问题的任何建议都会很棒.提前致谢.

Answer 1

添加JScrollPane和放置JLabel在JScrollPane解决这个问题.所以我想和大家分享一下.

private class ExtendedTableCellEditor extends AbstractCellEditor implements TableCellEditor
{
  JLabel _component = new JLabel();
  JScrollPane _pane = new JScrollPane(_component, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

 /**
  * Returns the cell editor component.
  *
  */
  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int rowIndex, int vColIndex)
  {
    if (value == null) return null;
    _component.setText(value != null ? value.toString() : "");
    _component.setToolTipText(value != null ? value.toString() : "");

    _component.setOpaque(true);
    _component.setBackground((isSelected) ? Color.BLUE_DARK : Color.WHITE);
    _component.setForeground((isSelected) ? Color.WHITE : Color.BLACK);

    _pane.setHorizontalScrollBar(_pane.createHorizontalScrollBar()); 
    _pane.setVerticalScrollBar(_pane.createVerticalScrollBar());
    _pane.setBorder(new EmptyBorder(0,0,0,0));
    _pane.setToolTipText(value != null ? value.toString() : "");
    return _pane;
  }
  public Object getCellEditorValue()
  {
    return _component.getText();
  }
}