Source Code : MultiLine Header Example

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MultiLine Header Example

 
// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html

/* (swing1.1beta3) */

import java.awt.Component;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.Enumeration;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListCellRenderer;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

/**
 * @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
alpha", "2nd
beta", "3rd
gamma" });

    JTable table = new JTable(dm);
    MultiLineHeaderRenderer renderer = new MultiLineHeaderRenderer();
    Enumeration e = table.getColumnModel().getColumns();
    while (e.hasMoreElements()) {
      ((TableColumn) e.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);
      }
    });
  }
}

/**
 * @version 1.0 11/09/98
 */

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;
  }
}


           
         
  

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