Java User-Interface Design

by Jeffrey Kay

Listing One

import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;
import java.util.*;
import java.io.*;

// Code is provided "AS IS" for example purposes only, without warranty 

public interface MCPaintable {
    abstract void paint(Graphics g, Object o,int width, int inset);
}

Listing Two

import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;
import java.util.*;
import java.io.*;

// Code provided "AS IS" for example purposes only, without warranty 
public interface MCSortable {
    abstract boolean lessthan(Object o);
    abstract boolean greaterthan(Object o);
}

Listing Three

import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;
import java.util.*;
import java.io.*;

// Code provided "AS IS" for example purposes only, without warranty 

class MCImage extends Object implements MCPaintable {
    Image image;
    public MCImage(Image i) {
        image = i;
    }
    public void paint(Graphics g, Object o,int width,int inset) {
        if (g == null) return;
        if (o instanceof ImageObserver) {
            g.drawImage(image,inset,0,(ImageObserver)o);
        }
    }
    public String toString() {
        return "Cryptolope";
    }
}
class TitleAbstract extends Object implements MCPaintable, MCSortable {
    String Title = "";
    String Abstract = "";

    public TitleAbstract(String t, String a) {
        Title = t;
        Abstract = a;
    }
    public String toString() {
        return Title + " " + Abstract;
    }
    public boolean lessthan(Object o) {
        return toString().compareTo(o.toString()) < 0;
    }
    public boolean greaterthan(Object o) {
        return toString().compareTo(o.toString()) > 0;
    }
    // void wrapString(Graphics g,String s,int w)
    
    public void paint(Graphics g, Object o,int width, int inset) {
        if (g == null) return;
        width -= inset;
        if (width <= 0) return; // hidden row
        String temp = "";
        FontMetrics fm = null;
        Font f = g.getFont();
        
        int col = 0;  // x coordinate
        int y = 0;  // y coordinate
        int lineheight = 0; // lineheight
        
        Font newFont = new Font(f.getName(),Font.BOLD,f.getSize());

        for(int i=0;i<2;i++) {
            StringTokenizer st = null;
            if (i == 0) {
                g.setFont(newFont);
                st = new StringTokenizer(Title);
                fm = g.getFontMetrics();
                y = fm.getMaxAscent();
            }
            else {
                g.setFont(f);
                fm = g.getFontMetrics();
                st = new StringTokenizer(Abstract);
            }
            lineheight = fm.getMaxAscent() + fm.getMaxDescent();
            while (st.hasMoreTokens()) {
                String tok = st.nextToken();
                if (temp == "") {
                    temp = tok;
                }
                else {
                    if (fm.stringWidth(temp + " " + tok) < width - col) {
                        temp += " " + tok;
                   }
                    else {
                      if ((col + fm.stringWidth(temp) > width) && (col != 0)) {
                          col = 0;
                          y += lineheight;
                          if (fm.stringWidth(temp + " " + tok) < width - col) {
                                g.drawString(temp,col,y);
                                col = 0;
                                y += lineheight;
                                temp = tok;
                            }
                        }
                        else {
                            g.drawString(temp,col+inset,y);
                            col = 0;
                            y += lineheight;
                            temp = tok;
                        }
                    }
                }
            }
            if (temp != "") {
                g.drawString(temp,col+inset,y);
                col += fm.stringWidth(temp)+fm.stringWidth("XX");
                temp = "";
                if (col > width) {
                    col = 0;
                    y += lineheight;
                }
            }
        }
    }
}