What this is

This file is part of the Tame Swing collection that we have compiled. All of the Java source code in these examples was created by Nobuo Tamemasa. As these examples have become hard to find on the internet, we have put them in one place here, supported by minimal advertising. In time we will include images of each running sample Java/Swing application.

The intent of having these files here is to help you learn Java and Swing by example, and Tame certainly created some terrific examples of the power of the Swing framework.

Other links

Keywords/tags

java, swing, JTable, cell, renderer, editor, progress, status, indicate, indicator, ImageIcon, table, icon, image, animated, model, TableModel, example, sample, source

The source code

/* (swing1.1) */
package tame.examples;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Hashtable;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;

import tame.table.IndicatorCellRenderer;

/**
@author Nobuo Tamemasa
@version 1.0 03/03/99
*/
public class IndicatorTableExample extends JPanel {
  private static final int MAX = 100;
  private static final int MIN = 0;

  public IndicatorTableExample(){
    setLayout(new BorderLayout());

    DefaultTableModel dm = new DefaultTableModel() {
      public Class getColumnClass(int col) {
        switch (col) {
          case  0: return String.class;
          case  1: return Integer.class;
          case  2: return Integer.class;
          default: return Object.class;
        }
      }
      public boolean isCellEditable(int row, int col) {
        switch (col) {
          case  2: return false;
          default: return true;
        }
      }
      public void setValueAt(Object obj, int row, int col) {
        if (col != 1) {
          super.setValueAt(obj, row, col);
          return;
        }
        try {
          Integer integer = new Integer(obj.toString());
          super.setValueAt(checkMinMax(integer), row, col);
        } catch (NumberFormatException ex) {
          ex.printStackTrace();
        }
      }
    };
    dm.setDataVector(new Object[][]{
      {"not human"   ,new Integer(100),new Integer(100)},
      {"hard worker" ,new Integer( 76),new Integer( 76)},
      {"ordinary guy",new Integer( 51),new Integer( 51)},
      {"lazy fellow" ,new Integer( 12),new Integer( 12)}},
      new Object[]{"Name","Result","Indicator"});

    JTable table = new JTable(dm);

    IndicatorCellRenderer renderer = new IndicatorCellRenderer(MIN,MAX);
    renderer.setStringPainted(true);
    renderer.setBackground(table.getBackground());

    // set limit value and fill color
    Hashtable limitColors = new Hashtable();
    limitColors.put(new Integer( 0), Color.green);
    limitColors.put(new Integer(60), Color.yellow);
    limitColors.put(new Integer(80), Color.red);
    renderer.setLimits(limitColors);
    table.getColumnModel().getColumn(2).setCellRenderer(renderer);

    table.getModel().addTableModelListener(new TableModelListener() {
      public void tableChanged(TableModelEvent e) {
        if (e.getType() == TableModelEvent.UPDATE) {
          int col = e.getColumn();
          if (col == 1) {
            int row = e.getFirstRow();
            TableModel model = (TableModel)e.getSource();
            Integer value = (Integer)model.getValueAt(row, col);
            model.setValueAt(checkMinMax(value), row, ++col);
          }
        }
      }
    });

    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f= new JFrame("IndicatorTable Example");
    f.getContentPane().add(new IndicatorTableExample(), BorderLayout.CENTER);
    f.setSize(400, 120);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
  }

  private Integer checkMinMax(Integer value) {
    int intValue = value.intValue();
    if (intValue < MIN) {
      intValue = MIN;
    } else if (MAX < intValue) {
      intValue = MAX;
    }
    return new Integer(intValue);
  }
}