Table表头（行号）演示（设置选中、颜色等）

import javax.swing.*;

import java.awt.*;
import javax.swing.table.*;
import javax.swing.event.*;

class TableRowHeaderDemo {
	public static void main(String[] args) {
		new TableRowHeaderFrame();
	}
}

class TableRowHeaderFrame extends JFrame {
	private static final long serialVersionUID = 1L;

	public TableRowHeaderFrame() {
		DefaultTableModel model = new DefaultTableModel(30, 10);
		JTable table = new JTable(model);
		/* 将table加入JScrollPane */
		JScrollPane scrollPane = new JScrollPane(table);
		/* 将rowHeaderTable作为row header加入JScrollPane的RowHeaderView区域 */
		scrollPane.setRowHeaderView(new RowHeaderTable(table, 40));
		this.getContentPane().add(scrollPane, BorderLayout.CENTER);
		this.setVisible(true);
		this.setSize(400, 200);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

/**
 * 用于显示RowHeader的JTable，只需要将其加入JScrollPane的RowHeaderView即可为JTable生成行标题
 */
class RowHeaderTable extends JTable {
	private static final long serialVersionUID = 1L;
	public JTable refTable;// 需要添加rowHeader的JTable

	/**
	 * 为JTable添加RowHeader，
	 * 
	 * @param refTable
	 *            需要添加rowHeader的JTable
	 * @param columnWideth
	 *            rowHeader的宽度
	 */
	public RowHeaderTable(JTable refTable, int columnWidth) {
		super(new RowHeaderTableModel(refTable.getRowCount()));
		this.refTable = refTable;
		this.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);// 不可以调整列宽
		this.getColumnModel().getColumn(0).setPreferredWidth(columnWidth);
		this.setDefaultRenderer(Object.class, new IsRowHeaderRenderer(refTable,
				this));// 设置渲染器
		this.setPreferredScrollableViewportSize(new Dimension(columnWidth, 0));
	}
}

/**
 * 用于显示RowHeader的JTable的渲染器，可以实现动态增加，删除行，在Table中增加、删除行时RowHeader
 * 一起变化。当选择某行时，该行颜色会发生变化
 */
class IsRowHeaderRenderer extends JLabel implements TableCellRenderer,
		ListSelectionListener {
	private static final long serialVersionUID = 1L;
	JTable reftable;// 需要添加rowHeader的JTable
	JTable tableShow;// 用于显示rowHeader的JTable

	public IsRowHeaderRenderer(JTable reftable, JTable tableShow) {
		this.reftable = reftable;
		this.tableShow = tableShow;
		// 增加监听器，实现当在reftable中选择行时，RowHeader会发生颜色变化
		ListSelectionModel listModel = reftable.getSelectionModel();
		listModel.addListSelectionListener(this);
	}

	public Component getTableCellRendererComponent(JTable table, Object obj,
			boolean isSelected, boolean hasFocus, int row, int col) {
		((RowHeaderTableModel) table.getModel()).setRowCount(reftable
				.getRowCount());// 设置行表头数量
		JTableHeader header = reftable.getTableHeader();
		this.setOpaque(true);
		setBorder(UIManager.getBorder("TableHeader.cellBorder"));// 设置为TableHeader的边框类型
		setHorizontalAlignment(CENTER);// 让text居中显示
		setBackground(header.getBackground());// 设置背景色为TableHeader的背景色
		if (isSelect(row)) { // 当选取单元格时,在row header上设置成选取颜色
			setForeground(Color.white);
			setBackground(Color.lightGray);
		} else {
			setForeground(header.getForeground());
		}
		setFont(header.getFont());
		setText(String.valueOf(row + 1));
		return this;
	}

	public void valueChanged(ListSelectionEvent e) {
		this.tableShow.repaint();
	}

	private boolean isSelect(int row) {
		int[] sel = reftable.getSelectedRows();
		for (int i = 0; i < sel.length; i++)
			if (sel[i] == row)
				return true;
		return false;
	}
}

/**
 * 用于显示表头RowHeader的JTable的TableModel，不实际存储数据
 */
class RowHeaderTableModel extends AbstractTableModel {
	private static final long serialVersionUID = 1L;
	private int rowCount;// 当前JTable的行数，与需要加RowHeader的TableModel同步

	public RowHeaderTableModel(int rowCount) {
		this.rowCount = rowCount;
	}

	public void setRowCount(int rowCount) {
		this.rowCount = rowCount;
	}

	public int getRowCount() {
		return rowCount;
	}

	public int getColumnCount() {
		return 1;
	}

	public Object getValueAt(int row, int column) {
		return row;
	}
}

 

评论

1 楼 kinganpo 2011-08-21