Name: sg39081			Date: 10/22/97


The brighter() method in the java.awt.Color class
does not work under certain conditions. For example
if I have chosen the color to be blue: RGB=(0,0,255)
it does not return a brighter version of the color.
In the source code, a new instance of Color is
returned which has the original color's RGB values
multiplied by a certain factor, but what if one of
the RGB values is 0, which mutliplied is still 0!
So a brighter version of pure blue is pure blue if
you execute the method... But aren't you supposed to
have a "lighter blue" as the brighter version...
------------
Or: Color.black.brighter() will not return a shade
of gray but pure black!
------------
Or maybe I'm confusing the technical definition of
brighter???

import java.awt.*;
import java.awt.event.*;

public class b
{
    Frame f;
    ColorComponent c1;
    Button b1;

    b(Color c)
    {
        f = new Frame();
        c1 = new ColorComponent(c);
        b1 = new Button("Brighter");

        f.add("North", c1);
        c1.addMouseListener(c1);
        b1.addMouseListener(new MouseAdapter()
            {
                public void mouseClicked(MouseEvent e)
                {
                    Color new_c = c1.myColor.brighter();
                    System.out.println("New color=(" +
                            new_c.getRed() + "," +
                            new_c.getGreen() + "," +
                            new_c.getBlue() + ")"
                            );
                    c1.setColor(new_c);
                    c1.paint(c1.getGraphics());
                }
            }
        );
        f.add("South", b1);

        f.pack();
        f.setVisible(true);
    }

    public static void main(String[] args)
    {
        b my_b;
        float r, g, b;
        if (args.length ==3)
        {
            r = new Float(args[0]).floatValue();
            g = new Float(args[1]).floatValue();
            b = new Float(args[2]).floatValue();
            my_b = new b(new Color(r/255.0f, g/255.0f, b/255.0f));
        }
        else
            my_b = new b(new Color(0,100,100));
    }
}

class ColorComponent extends Component implements MouseListener
{
        public ColorComponent() { }

        public ColorComponent(Color c)
        {
                myColor = c;
        }

        public Dimension getPreferredSize()
        {
                return new Dimension(100,100);
        }
         public void paint(Graphics g)
        {
                g.setColor(myColor);
                g.fillRect(0,0,100,100);
        }
        public void setColor(Color c)
        {
            myColor = c;
        }

        public void mouseClicked(MouseEvent me)
        {
                if (myColor.equals(Color.red))
                        System.out.println("Red");
                else
                        System.out.println("Blue");
        }
        public void mouseEntered(MouseEvent me) { }
        public void mouseExited(MouseEvent me) { }
        public void mousePressed(MouseEvent me) { }
        public void mouseReleased(MouseEvent me) { }

        public Color myColor = Color.black;
}

======================================================================