/*
 * @(#)TextureChooser.java	1.14 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.
 */


import java.awt.*;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import java.awt.font.TextLayout;
import java.awt.font.FontRenderContext;
import com.sun.java.swing.JPanel;
import com.sun.java.swing.border.TitledBorder;
import com.sun.java.swing.border.EtchedBorder;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.net.URL;


/**
 * Four types of Paint displayed: Geometry, Text & Image Textures and
 * a Gradient Paint.  Paints can be selected with the Mouse.
 */
public class TextureChooser extends JPanel {

    public Object texture;
    public int num;

    public TextureChooser(int num) {
	this.num = num;
        setLayout(new GridLayout(0,2,5,5));
	setBorder(new TitledBorder(new EtchedBorder(), "Texture Chooser"));

	add(new TextureChooserCanvas(getGeomTexture(), this, 0));
	add(new TextureChooserCanvas(getImageTexture(), this, 1));
	add(new TextureChooserCanvas(getTextTexture(), this, 2));
	add(new TextureChooserCanvas(getGradientPaint(), this, 3));
    }


    public TexturePaint getGeomTexture() {
        BufferedImage bi = new BufferedImage(5, 5, BufferedImage.TYPE_INT_RGB);
        Graphics2D tG2 = bi.createGraphics();
	tG2.setBackground(Color.white);
	tG2.clearRect(0,0,5,5);
        tG2.setColor(new Color(211,211,211,200));
        tG2.fill(new Ellipse2D.Float(0,0,5,5));
        Rectangle r = new Rectangle(0,0,5,5);
	return new TexturePaint(bi,r);
    }

    public TexturePaint getImageTexture() {
	URL url = TextureChooser.class.getResource("images/HotJava-16.gif");
        Image img = getToolkit().getImage(url);
	try {
            MediaTracker tracker = new MediaTracker(this);
            tracker.addImage(img, 0);
            tracker.waitForID(0);
	} catch (Exception e) {}
        int iw = img.getWidth(this);
        int ih = img.getHeight(this);
        BufferedImage bi = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_ARGB);
        Graphics2D tG2 = bi.createGraphics();
	tG2.setColor(Color.white);
	tG2.clearRect(0,0,iw,ih);
        tG2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0.25f));
        tG2.drawImage(img, null, this);
        Rectangle r = new Rectangle(0,0,iw,ih);
	return new TexturePaint(bi,r);
    }


    public TexturePaint getTextTexture() {
	Font f = new Font("Times New Roman", Font.BOLD, 10);
	TextLayout tl = new TextLayout("Java2D", f, new FontRenderContext(null, false, false));
	int sw = (int) tl.getBounds().getWidth();
	int sh = (int) (tl.getAscent()+tl.getDescent());
        BufferedImage bi = new BufferedImage(sw, sh, BufferedImage.TYPE_INT_RGB);
        Graphics2D tG2 = bi.createGraphics();
	tG2.setBackground(Color.white);
	tG2.clearRect(0,0,sw,sh);
        tG2.setColor(Color.lightGray);
        tl.draw(tG2, 0, (float) tl.getAscent());
	Rectangle r = new Rectangle(0,0,sw,sh);
	return new TexturePaint(bi,r);
    }


    public GradientPaint getGradientPaint() {
	return new GradientPaint(0,0,Color.white,80,0,Color.green);
    }

    public class TextureChooserCanvas extends Canvas implements MouseListener {

	public boolean clickedFrame;
	private int num;
	private TextureChooser tc;
	private boolean enterExitFrame = false;
	private Object t;

        public TextureChooserCanvas(Object t, TextureChooser tc, int num) {
	    setBackground(Color.white);
	    this.t = t;
	    this.tc = tc;
	    this.clickedFrame = (num == tc.num);
	    this.num = num;
	    if (num == tc.num)
		tc.texture = t;
	    addMouseListener(this);
        }

        public void paint(Graphics g) {
	    Graphics2D g2 = (Graphics2D) g;
	    int w = getSize().width;
	    int h = getSize().height;
	    if (t instanceof TexturePaint)
	        g2.setPaint((TexturePaint) t);
	    else {
	        g2.setPaint((GradientPaint) t);
	    }
	    g2.fill(new Rectangle(0,0,w,h));
	    if (clickedFrame || enterExitFrame) {
	        g2.setColor(Color.gray);
	        BasicStroke bs = new BasicStroke(3, BasicStroke.CAP_BUTT,
	    		    	BasicStroke.JOIN_MITER);
		g2.setStroke(bs);
		g2.drawRect(0,0,w-1,h-1);
		tc.num = num;
	    }
        }

        public void mouseClicked(MouseEvent e) {
	    tc.texture = t;
	    clickedFrame = true;

	    Component cmps[] = tc.getComponents();
	    for (int i = 0; i < cmps.length; i++) {
	        if (cmps[i] instanceof TextureChooserCanvas) {
		    TextureChooserCanvas tcc = (TextureChooserCanvas) cmps[i];
		    if (!tcc.equals(this) && tcc.clickedFrame) {
		        tcc.clickedFrame = false;
		        tcc.repaint();
		    }
		}
	    }
        }

        public void mousePressed(MouseEvent e) {
        }

        public void mouseReleased(MouseEvent e) {
        }

        public void mouseEntered(MouseEvent e) {
	    enterExitFrame = true;
	    repaint();
        }

        public void mouseExited(MouseEvent e) {
	    enterExitFrame = false;
	    repaint();
        }

        public Dimension getMinimumSize() {
	    return getPreferredSize();
        }

        public Dimension getMaximumSize() {
	    return getPreferredSize();
        }

        public Dimension getPreferredSize() {
	    return new Dimension(30,30);
        }

    }

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