凍結列的初步實現

之前老想着用一個Jtable上實現凍結列的效果，弄得非常複雜還出錯。現在我用兩個Jtable合併起來，第一個table作爲凍結的列，第二個作爲非凍結的列，這樣就好辦了。爲了使外界看起來是一個Table,就需要改進如下幾點：
1.ListSelected事件統一處理，選中某個表中任何一行，另外一個表的對應行也需要被選中。
2.Mouse事件，Key事件統一處理，repaint事件也統一處理。
3.其他事件均統一處理。

public class MergeTable {
	private JTable actualTable;
	private JTable fixTable;
	private FixTableModel fixModel;
	private ActualTableModel actualModel;
	private int fixColumnCount; 
	private String[] columnHeader;
	private JScrollPane mainScroll;
	private Object[][] tableData;

	public MergeTable(int fixColumnCount, String[] columnHeader,
			Object[][] tableData) {
		this.fixColumnCount = fixColumnCount;
		this.columnHeader = columnHeader;
		this.tableData = tableData;
		this.initComponents();
	}

	private void initComponents() {
		actualTable = new JTable();
		fixTable = new JTable();
		actualModel = new ActualTableModel();
		fixModel = new FixTableModel();
		actualTable.setModel(actualModel);
		actualTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		actualTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		fixTable.setModel(fixModel);
		fixTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		fixTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		actualTable.getSelectionModel().addListSelectionListener(
				new ListSelectionListener() {
					public void valueChanged(ListSelectionEvent e) {
						checkSelection(false);
					}
				});
		fixTable.getSelectionModel().addListSelectionListener(
				new ListSelectionListener() {
					public void valueChanged(ListSelectionEvent e) {
						checkSelection(true);
					}
				});

		actualTable.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent e) {
				if (e.getClickCount() > 1) {
					if (e.getSource().equals(actualTable)) {
						MouseListener[] mls = (MouseListener[]) fixTable
								.getListeners(MouseListener.class);
						for (int i = 0; i < mls.length; i++)
							mls[i].mouseClicked(e);
					}
				}
			}
		});

		fixTable.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent e) {
				if (e.getClickCount() > 1) {
					if (e.getSource().equals(fixTable)) {
						System.out.println("Click fix column");
					} else {
						System.out.println("Click actual column");
					}
				}
			}
		});

		mainScroll = new JScrollPane();
		mainScroll.getViewport().add(actualTable);
		JViewport fixPort = new JViewport();
		fixPort.setPreferredSize(fixTable.getPreferredSize());
		fixPort.add(fixTable);
		mainScroll.setRowHeaderView(fixPort);
		mainScroll.setCorner(JScrollPane.UPPER_LEFT_CORNER, fixTable
				.getTableHeader());
	}

	/**
	 * @param tableData
	 */
	public void setData(Object[][] tableData) {
		this.tableData = tableData;
	}

	public JScrollPane getTableContentPane() {
		return mainScroll;
	}

	/**
	 * @param isFixedTable
	 */
	private void checkSelection(boolean isFixedTable) {
		int fixedSelectedIndex = fixTable.getSelectedRow();
		int selectedIndex = actualTable.getSelectedRow();
		if (fixedSelectedIndex != selectedIndex) {
			if (isFixedTable) {
				actualTable.setRowSelectionInterval(fixedSelectedIndex,
						fixedSelectedIndex);
			} else {
				fixTable.setRowSelectionInterval(selectedIndex, selectedIndex);
			}
		}

	}


	private class FixTableModel extends AbstractTableModel {

		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;

		public int getColumnCount() {
			return fixColumnCount;
		}

		public int getRowCount() {
			return tableData.length;
		}

		public Object getValueAt(int rowIndex, int columnIndex) {
			if (tableData[rowIndex][columnIndex] != null)
				return tableData[rowIndex][columnIndex];
			return "";
		}

		public String getColumnName(int column) {
			return columnHeader[column];
		}
	}

	private class ActualTableModel extends AbstractTableModel {

		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;

		public int getColumnCount() {
			return columnHeader.length - fixColumnCount;
		}

		public int getRowCount() {
			return tableData.length;
		}

		public Object getValueAt(int rowIndex, int columnIndex) {
			if (tableData[rowIndex][columnIndex + fixColumnCount] != null)
				return tableData[rowIndex][columnIndex + fixColumnCount];
			return "";
		}

		public String getColumnName(int column) {
			return columnHeader[column + fixColumnCount];
		}

	}
}

簡單的測試程序

package com;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class MergeTableFrame extends JFrame {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private MergeTable table;

	/**
	 * 
	 */
	public MergeTableFrame() {
		super("MergeTable");
		setPreferredSize(new Dimension(300, 200));
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel panel = new JPanel();
		panel.setLayout(new BorderLayout());
		getContentPane().add(panel, BorderLayout.CENTER);

		String[] columns = new String[] { "Name", "Number", "English", "Chinese", "Maths", "Integration" };

		Object[][] data = new Object[][] {
				{ "Hank", "101", "84", "74", "65", "76" },
				{ "Ryo", "102", "63", "77", "88", "39" },
				{ "Ken", "103", "98", "36", "26", "98" },
				{ "Luna", "104", "98", "76", "87", "66" },
				{ "Mei", "105", "76", "46", "67", "45" },
				{ "Mike", "106", "54", "68", "63", "44" } };
		table = new MergeTable(1, columns, data);
		panel.add(table.getTableContentPane());
	}

	public static void main(String args[]) {
		SwingUtilities.invokeLater(new Runnable() {

			public void run() {
				MergeTableFrame frame = new MergeTableFrame();
				frame.setVisible(true);
				frame.pack();
			}
		});
	}
}