/*
 * PCFDemo1.java
 *      A simple demonstration of PCFFont.
 *      Usage:  <applet code="PCFDemo1.class width=100 height=100>
 *              </applet>
 *
 * Ken Shirriff         ken.shirriff@eng.sun.com
 *
 * Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 * Please refer to the file "license.txt"
 * for further important copyright and licensing information.
 */

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

public class PCFDemo1 extends Applet implements CompletionCallback {
	Choice font_selector;
	Image buffer;
	Image backImg;
	int x, y;
	PCFFont font; // Current font
	TextField tf; 
	Checkbox reverse; 
	Choice fg, bg;
	int dispWidth, dispHeight;
	Button clear;
	Fontlist fontlist, fontlistaa;
	Checkbox aa;
	int offset = 0;
	int backwards =0;

/**
 * colornames holds the names of common colors
 */
	static String colornames[] = { "Black", "Blue", "Cyan",
	    "DarkGray", "Gray", "Green", "LightGray", "Magenta", "Orange",
	    "Pink", "Red", "White", "Yellow", "None"};

/**
 * holds the Color corresponding to the entry in colornames.
 */
	public static Color colors[] = {Color.black, Color.blue, Color.cyan,
	    Color.darkGray, Color.gray, Color.green, Color.lightGray,
	    Color.magenta, Color.orange, Color.pink, Color.red, Color.white,
	    Color.yellow, null};

	// Set up the user interface
	public void init() {
		String offset_s = getParameter("offset");
		if (offset_s != null) {
			offset = Integer.parseInt(offset_s);
		}
		String back_s = getParameter("backwards");
		if (back_s != null) {
			backwards = Integer.parseInt(back_s);
		}
		String fontlistfile = getParameter("fontlist");
		if (fontlistfile == null) {
			System.out.println("Need to specify fontlist");
			showStatus("Need to specify fontlist");
			return;
		}
		try {
			fontlist = new Fontlist(getDocumentBase(),
			    fontlistfile, false);
			fontlistaa = new Fontlist(getDocumentBase(),
			    fontlistfile, true);
		} catch (IOException e) {
			System.out.println("IOException "+e);
			showStatus("IOException "+e);
			return;
		}
		font_selector = new Choice();
		for (int i=0; i<fontlist.getNumFonts(); i++) {
			font_selector.addItem(fontlist.getNames()[i]);
                }

		setLayout(new BorderLayout());
		Panel p = new Panel();
		add("South",p);
		dispWidth = size().width;
		dispHeight = size().height;
		p.resize(dispWidth, 2);
		tf = new TextField("Hello! This is sample text.", 20);
		p.setLayout(new BorderLayout());
		p.add("North",tf);

		Panel controls = new Panel();
		clear = new Button("Clear");
		controls.add(clear);
		controls.add(font_selector);
		reverse = new Checkbox("Reverse");
		if (backwards != 0) {
			reverse.setState(true);
		}
		controls.add(reverse);
		fg = new Choice();
		controls.add(fg);
		bg = new Choice();
		controls.add(bg);
		aa = new Checkbox("Antialias");
		controls.add(aa);
		p.add("South",controls);

		for (int i=0; i<colors.length; i++) {
			fg.addItem(colornames[i]);
			bg.addItem(colornames[i]);
		}
		fg.select("Black");
		bg.select("LightGray");

		validate();
		dispHeight -= p.size().height;

		backImg = createImage(dispWidth, dispHeight);
		String default_s = getParameter("defaultfont");
		int fontnum = 0;
		if (default_s != null) {
			fontnum = fontlist.lookupFont(default_s);
		}
		if (fontnum<0) {
			fontnum = 0;
		}
		font = fontlist.openfont(fontnum, this);
		font_selector.select(fontnum);
		repaint();
	}

	// Handle a UI event
	public boolean handleEvent(Event e) {
		if (e.target.equals(clear)) {
			tf.setText("");
			repaint();
		} else if (e.target.equals(fg)) {
			font.setFgColor(colors[fg.getSelectedIndex()]);
			repaint();
		} else if (e.target.equals(bg)) {
			font.setBgColor(colors[bg.getSelectedIndex()]);
			repaint();
		} else if (e.target.equals(reverse)) {
			repaint();
		} else if (e.target.equals(tf)) {
			repaint();
		} else if (e.target.equals(font_selector) ||
		    e.target.equals(aa)) {
			if (aa.getState()) {
				font = fontlistaa.openfont(
				    font_selector.getSelectedIndex(), this);
			} else {
				font = fontlist.openfont(
				    font_selector.getSelectedIndex(), this);
			}
			font.setFgColor(colors[fg.getSelectedIndex()]);
			font.setBgColor(colors[bg.getSelectedIndex()]);
			repaint();
			return true;
		}
		return super.handleEvent(e);
	}

	// This is the callback to indicate how much of the font has been read.
	public void completed(int percent) {
		showStatus("Read "+percent+"%");
		Graphics g = getGraphics();
		g.setColor(Color.red);
		g.fillRect(0,dispHeight/2-10,(dispWidth*percent)/100,20);
	}

	public void update(Graphics g) {
		paint(g);
	}

	// Draw the string on the screen, using double buffering
	public void paint(Graphics g) {
		Graphics backG = backImg.getGraphics();
		backG.setColor(Color.lightGray);
		backG.fillRect(0,0,dispWidth, dispHeight);
		if (font != null) {
			int h = font.getHeight();
			// Draw the string in the specified font
			String s = PCFFont.toUnicode(tf.getText());
			if (offset != 0) {
				StringBuffer sb = new StringBuffer(s);
				for (int i = 0; i < sb.length(); i++) {
					int ch = (int)sb.charAt(i);
					// Only offset characters >= A
					if (ch > 64 && ch+offset < 256) {
						sb.setCharAt(i,
							(char)(ch+offset));
					}
				}
				s = new String(sb);
			}
			// Reverse text string for Hebrew, etc.
			if (reverse.getState()) {
				StringBuffer sb = new StringBuffer(s);
				StringBuffer sb2 = new StringBuffer(s);
				for (int i = 0; i < sb.length(); i++) {
					sb2.setCharAt(i,
						sb.charAt(sb.length()-i-1));
				}
				s = new String(sb2);
			}
			// Draw text right-justified.
			if (backwards != 0) {
				g.drawImage(backImg, 0, 0, null);
				font.drawString(backG, s,
					dispWidth-font.stringWidth(s), h);
				g.drawImage(backImg, 0, 0, null);
			} else {
				font.drawString(backG, s, 10, h);
				g.drawImage(backImg, 0, 0, null);
			}
		}
	}

        public String getAppletInfo() {
                return "PCFDemo1 by Ken Shirriff  shirriff@eng.sun.com";
        }
 
}