Author: Nobuo Tamemasa

// File: MultiLineHeaderExample.java
/* (swing1.1beta3) */
//package jp.gr.java_conf.tame.swing.examples;

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import jp.gr.java_conf.tame.swing.table.*;


/**
 * @version 1.0 11/09/98
 */
public class MultiLineHeaderExample extends JFrame {
  MultiLineHeaderExample() {
	super( "Multi-Line Header Example" );

    DefaultTableModel dm = new DefaultTableModel();
	dm.setDataVector(new Object[][]{{"a","b","c"},
					{"A","B","C"}},
			 new Object[]{"1st\nalpha","2nd\nbeta","3rd\ngamma"});

    JTable table = new JTable( dm );
	MultiLineHeaderRenderer renderer = new MultiLineHeaderRenderer();
	Enumeration enum = table.getColumnModel().getColumns();
	while (enum.hasMoreElements()) {
	  ((TableColumn)enum.nextElement()).setHeaderRenderer(renderer);
	}   
	JScrollPane scroll = new JScrollPane( table );
	getContentPane().add( scroll );
	setSize( 400, 110 );
	setVisible(true);
  }

  public static void main(String[] args) {
	MultiLineHeaderExample frame = new MultiLineHeaderExample();
	frame.addWindowListener( new WindowAdapter() {
	  public void windowClosing( WindowEvent e ) {
	    System.exit(0);
	  }
	});
  }
}




// File: MultiLineHeaderRenderer.java
/* (swing1.1beta3) */

package jp.gr.java_conf.tame.swing.table;

import java.io.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;


/**
 * @version 1.0 11/09/98
 */
public class MultiLineHeaderRenderer extends JList implements TableCellRenderer {
  public MultiLineHeaderRenderer() {
	setOpaque(true);
	setForeground(UIManager.getColor("TableHeader.foreground"));
	setBackground(UIManager.getColor("TableHeader.background"));
	setBorder(UIManager.getBorder("TableHeader.cellBorder"));
	ListCellRenderer renderer = getCellRenderer();
	((JLabel)renderer).setHorizontalAlignment(JLabel.CENTER);
	setCellRenderer(renderer);
  }

  public Component getTableCellRendererComponent(JTable table, Object value,
		       boolean isSelected, boolean hasFocus, int row, int column) {
	setFont(table.getFont());
	String str = (value == null) ? "" : value.toString();
	BufferedReader br = new BufferedReader(new StringReader(str));
	String line;
	Vector v = new Vector();
	try {
	  while ((line = br.readLine()) != null) {
	    v.addElement(line);
	  }
	} catch (IOException ex) {
	  ex.printStackTrace();
	}
	setListData(v);
	return this;
  }
}

Posted On: 2-Jan-1999

internet.commerce