/*
 * @(#)Tree.java	1.13 98/06/29
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package demos.Fonts;

import java.awt.*;
import java.awt.event.*;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import J2DCanvas;


/**
 * Transformation of characters.
 */
public class Tree extends J2DCanvas {

    private char theC = 'A';
    private Character theT = new Character(theC);
    private Character theR = new Character((char) ((int) theC + 1));


    public Tree() {
	setBackground(Color.white);
	sleepAmount = 4000;
	runnable = true;
    }


    public void drawDemo(Graphics2D g2) {
	int mindim = Math.min(w, h);
	AffineTransform at = new AffineTransform();
	at.translate((w - mindim) / 2.0,
		     (h - mindim) / 2.0);
	at.scale(mindim, mindim);
	at.translate(0.5, 0.5);
	at.scale(0.3, 0.3);
	at.translate(-(Twidth + Rwidth), FontHeight / 4.0);
	g2.transform(at);
	tree(g2, mindim * 0.3, 0);

    	theT = new Character(theC = ((char) ((int) theC + 1)));
    	theR = new Character((char) ((int) theC + 1));
	if (theR.compareTo(new Character('z')) == 0)
	    theC = 'A';
    }


    static Font theFont = new Font("Palatino", Font.PLAIN, 1);
    static double Twidth = 0.6;
    static double Rwidth = 0.6;
    static double FontHeight = 0.75;
    static Color colors[] = {Color.blue,
			     Color.red.darker(),
			     Color.green.darker()};


    public void tree(Graphics2D g2d, double size, int phase) {
	g2d.setColor(colors[phase % 3]);
	new TextLayout(theT.toString(),theFont,g2d.getFontRenderContext()).draw(g2d, 0.0f, 0.0f);
	if (size > 10.0) {
	    AffineTransform at = new AffineTransform();
	    at.setToTranslation(Twidth, -0.1);
	    at.scale(0.6, 0.6);
	    g2d.transform(at);
	    size *= 0.6;
	    new TextLayout(theR.toString(),theFont, g2d.getFontRenderContext()).draw(g2d, 0.0f, 0.0f);
	    at.setToTranslation(Rwidth+0.75, 0);
	    g2d.transform(at);
	    Graphics2D g2dt = (Graphics2D) g2d.create();
	    at.setToRotation(-Math.PI / 2.0);
	    g2dt.transform(at);
	    tree(g2dt, size, phase + 1);
	    g2dt.dispose();
	    at.setToTranslation(.75, 0);
	    at.rotate(-Math.PI / 2.0);
	    at.scale(-1.0, 1.0);
	    at.translate(-Twidth, 0);
	    g2d.transform(at);
	    tree(g2d, size, phase);
	}
	g2d.setTransform(new AffineTransform());
    }


    public static void main(String s[]) {
	final Tree demo = new Tree();
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	    public void windowDeiconified(WindowEvent e) { demo.start(); }
	    public void windowIconified(WindowEvent e) { demo.stop(); }
	};
	Frame f = new Frame("Java2D Demo - Tree");
	f.addWindowListener(l);
	f.add("Center", demo);
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
	demo.start();
    }
}