Author: Nobuo Tamemasa

Use different backgrounds and foregrounds colors in different cells.

The sample code showing how to use the different classes is given below. At the bottom you will find the link to download the classes as a zip file.

// File: ColoredCellTableExample.java
/*
 * (swing1.1beta3)
 */
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;

import jp.gr.java_conf.tame.swing.table.*;
import jp.gr.java_conf.tame.swing.colorchooser.*;



/**
 * @version 1.0 11/22/98
 */
public class ColoredCellTableExample extends JFrame {
  private JTable table;
  private ColoredCell cellAtt;

  public ColoredCellTableExample() {
    super( "Colored Cell Example" );    
    
    AttributiveCellTableModel ml = new AttributiveCellTableModel(10,6);
    cellAtt =(ColoredCell)ml.getCellAttribute();
    table = new JTable( ml );
    table.setCellSelectionEnabled(true);
    table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
    table.setDefaultRenderer(Object.class ,new AttributiveCellRenderer());
    JScrollPane scroll = new JScrollPane( table );

    JButton b_fore   = new JButton("Foreground");
    b_fore.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        changeColor(true);
      }
    });
    JButton b_back   = new JButton("Background");
    b_back.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        changeColor(false);
      }
    });
    JPanel p_buttons = new JPanel();
    p_buttons.setLayout(new GridLayout(2,1));
    p_buttons.add(b_fore);
    p_buttons.add(b_back);
    Box box = new Box(BoxLayout.X_AXIS);
    box.add(scroll);
    box.add(new JSeparator(SwingConstants.HORIZONTAL));
    box.add(p_buttons);
    getContentPane().add( box );
    setSize( 400, 200 );
    setVisible(true);
  }
  
  private final void changeColor(boolean isForeground) {
    int[] columns = table.getSelectedColumns();
    int[] rows    = table.getSelectedRows();
    if ((rows == null) || (columns == null)) return;
    if ((rows.length<1)||(columns.length<1)) return;
    Color target    = cellAtt.getForeground(rows[0], columns[0]);
    Color reference = cellAtt.getBackground(rows[0], columns[0]);
    for (int i=0;i<rows.length;i++) {
      int row = rows[i];
      for (int j=0;j<columns.length;j++) {
        int column = columns[j];
        target    = (target    != cellAtt.getForeground(row, column)) ?
          null : target;
        reference = (reference != cellAtt.getBackground(row, column)) ?
          null : reference;
      }
    }
    String title;
    if (isForeground) {
      target    = (target   !=null) ? target    : table.getForeground();
      reference = (reference!=null) ? reference : table.getBackground();
      title = "Foreground Color";
    } else {
      target    = (reference!=null) ? reference : table.getBackground();
      reference = (target   !=null) ? target    : table.getForeground();
      title = "Foreground Color";
    }   
    TextColorChooser chooser =
      new TextColorChooser(target, reference, isForeground);
    Color color = chooser.showDialog(ColoredCellTableExample.this,title);
    if (color != null) {        
      if (isForeground) {
        cellAtt.setForeground(color, rows, columns);
      } else {
        cellAtt.setBackground(color, rows, columns);
      }
      table.clearSelection();
      table.revalidate();
      table.repaint();    
    }
  }

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

Download Source Files

Posted On: 3-Jan-1999

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