stars3d.java

一个小公司要求给写的很简单的任务管理系统。

/*
 * @(#)Stars3D.java	1.32 06/08/29
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * 
 * -Redistribution in binary form must reproduce the above copyright notice, 
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST 
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, 
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY 
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, 
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

/*
 * @(#)Stars3D.java	1.32 06/08/29
 */

package java2d.demos.Mix;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.font.FontRenderContext;
import javax.swing.*;
import java2d.ControlsSurface;
import java2d.CustomControls;

import static java.awt.Color.*;


/**
 * Generate a 3D text shape with GeneralPath, render a number of small
 * multi-colored rectangles and then render the 3D text shape.
 */
public class Stars3D extends ControlsSurface {

    private static Color colors[] = { RED, GREEN, WHITE };
    private static AffineTransform at = AffineTransform.getTranslateInstance(-5, -5);
    private Shape shape, tshape;
    private Shape ribbon;
    protected int fontSize = 72;
    protected String text = "Java2D";
    protected int numStars = 300;
    private DemoControls controls;


    public Stars3D() {
        setBackground(BLACK);
        setControls(new Component[] { new DemoControls(this) });
    }


    public void render(int w, int h, Graphics2D g2) {

        Rectangle2D rect = new Rectangle2D.Double();
        for (int i = 0; i < numStars; i++) {
            g2.setColor(colors[i%3]);
            g2.setComposite(AlphaComposite.getInstance(
                         AlphaComposite.SRC_OVER, (float) Math.random()));
            rect.setRect(w*Math.random(), h*Math.random(),2,2);
            g2.fill(rect);
        }

        FontRenderContext frc = g2.getFontRenderContext();
        Font font = new Font("serif.bolditalic", Font.PLAIN, fontSize);
        shape = font.createGlyphVector(frc, text).getOutline();
        tshape = at.createTransformedShape(shape);
        PathIterator pi = shape.getPathIterator(null);
        
        float  seg[] = new float[6];
        float tseg[] = new float[6];
        
        GeneralPath working = new GeneralPath(GeneralPath.WIND_NON_ZERO);
        float   x=0,   y=0; // Current point on the path
        float  tx=0,  ty=0; // Transformed path point
        float  cx=0,  cy=0; // Last moveTo point, for SEG_CLOSE
        float tcx=0, tcy=0; // Transformed last moveTo point
        
        //
        // Iterate through the Shape and build the ribbon
        // by adding general path objects.
        //
        while(!pi.isDone()) {
            int segType = pi.currentSegment(seg);
            switch(segType) {
                case PathIterator.SEG_MOVETO:
                    at.transform(seg, 0, tseg, 0, 1);
                     x =  seg[0];
                     y =  seg[1];
                    tx = tseg[0];
                    ty = tseg[1];
                     cx =  x;
                     cy =  y;
                    tcx = tx;
                    tcy = ty;
                    break;
                case PathIterator.SEG_LINETO:
                    at.transform(seg, 0, tseg, 0, 1);
                    if (Line2D.relativeCCW(x, y, tx, ty, seg[0], seg[1]) < 0) {
                        working.moveTo(x, y);
                        working.lineTo( seg[0],  seg[1]);
                        working.lineTo(tseg[0], tseg[1]);
                        working.lineTo(tx, ty);
                        working.lineTo( x,  y);
                    } else {
                        working.moveTo( x,  y);
                        working.lineTo(tx, ty);
                        working.lineTo(tseg[0], tseg[1]);
                        working.lineTo( seg[0],  seg[1]);
                        working.lineTo(x, y);
                    }
                    
                     x =  seg[0];
                     y =  seg[1];
                    tx = tseg[0];
                    ty = tseg[1];
                    break;
                        
                case PathIterator.SEG_QUADTO:
                    at.transform(seg, 0, tseg, 0, 2);
                    if (Line2D.relativeCCW(x, y, tx, ty, seg[2], seg[3]) < 0) {
                        working.moveTo(x, y);
                        working.quadTo( seg[0],  seg[1],
                                        seg[2],  seg[3]);
                        working.lineTo(tseg[2], tseg[3]);
                        working.quadTo(tseg[0], tseg[1],
                                       tx,      ty);
                        working.lineTo( x,       y);
                    } else {
                        working.moveTo( x,       y);
                        working.lineTo(tx,      ty);
                        working.quadTo(tseg[0], tseg[1],
                                       tseg[2], tseg[3]);
                        working.lineTo( seg[2],  seg[3]);
                        working.quadTo( seg[0],  seg[1],
                                        x,       y);
                    }
            
                     x =  seg[2];
                     y =  seg[3];
                    tx = tseg[2];
                    ty = tseg[3];
                    break;
        
                case PathIterator.SEG_CUBICTO:
                    at.transform(seg, 0, tseg, 0, 3);
                    if (Line2D.relativeCCW(x, y, tx, ty, seg[4], seg[5]) < 0) {
                        working.moveTo(x, y);
                        working.curveTo( seg[0],  seg[1],
                                         seg[2],  seg[3],
                                         seg[4],  seg[5]);
                        working.lineTo( tseg[4], tseg[5]);
                        working.curveTo(tseg[2], tseg[3],
                                        tseg[0], tseg[1],
                                        tx,      ty);
                        working.lineTo(x, y);
                    } else {
                        working.moveTo(x, y);
                        working.lineTo(tx, ty);
                        working.curveTo(tseg[0], tseg[1],
                                        tseg[2], tseg[3],
                                        tseg[4], tseg[5]);
                        working.lineTo(  seg[4],  seg[5]);
                        working.curveTo( seg[2],  seg[3],
                                         seg[0],  seg[1],
                                         x,       y);
                    }
            
                     x =  seg[4];
                     y =  seg[5];
                    tx = tseg[4];
                    ty = tseg[5];
                    break;
        
                case PathIterator.SEG_CLOSE:
                    if (Line2D.relativeCCW(x, y, tx, ty, cx, cy) < 0) {
                        working.moveTo(  x,   y);
                        working.lineTo( cx,  cy);
                        working.lineTo(tcx, tcy);
                        working.lineTo( tx,  ty);
                        working.lineTo(  x,   y);
                    } else {
                        working.moveTo(  x,   y);
                        working.lineTo( tx,  ty);
                        working.lineTo(tcx, tcy);
                        working.lineTo( cx,  cy);
                        working.lineTo(  x,   y);
                    }
                     x =  cx; 
                     y =  cy;
                    tx = tcx;
                    ty = tcy;
            }
            pi.next();
        } // while
        ribbon = working;

        if (composite != null) {
            g2.setComposite(composite);
        } else {
            g2.setComposite(AlphaComposite.SrcOver);
        }
        Rectangle r = shape.getBounds();
        g2.translate(w*.5-r.width*.5,h*.5+r.height*.5);

        g2.setColor(BLUE);
        g2.fill(tshape);
        g2.setColor(new Color(255, 255, 255, 200));
        g2.fill(ribbon);

        g2.setColor(WHITE);
        g2.fill(shape);

        g2.setColor(BLUE);
        g2.draw(shape);
    }


    public static void main(String argv[]) {
        createDemoFrame(new Stars3D());
    }


    static class DemoControls extends CustomControls implements ActionListener {

        Stars3D demo;
        JTextField tf1, tf2;

        public DemoControls(Stars3D demo) {
            super(demo.name);
            this.demo = demo;
            JLabel l = new JLabel("  Text:");
            l.setForeground(BLACK);
            add(l);
            add(tf1 = new JTextField(demo.text));
            tf1.setPreferredSize(new Dimension(60,20));
            tf1.addActionListener(this);
            l = new JLabel("  Size:");
            l.setForeground(BLACK);
            add(l);
            add(tf2 = new JTextField(String.valueOf(demo.fontSize)));
            tf2.setPreferredSize(new Dimension(30,20));
            tf2.addActionListener(this);
        }

        public void actionPerformed(ActionEvent e) {
            try { 
                if (e.getSource().equals(tf1)) {
                    demo.text = tf1.getText().trim();
                } else if (e.getSource().equals(tf2)) {
                    demo.fontSize = Integer.parseInt(tf2.getText().trim());
                    if (demo.fontSize < 10) {
                        demo.fontSize = 10;
                    }
                }
                demo.repaint();
            } catch (Exception ex) {}
        }

        public Dimension getPreferredSize() {
            return new Dimension(200,37);
        }


        public void run() {
            Thread me = Thread.currentThread();
            try { thread.sleep(999); } catch (Exception e) { return; }
            int length = getSize().width / 4;
            int   size[] = { length, length };
            String str[] = { "JAVA", "J2D"  };
            while (thread == me) {
                for (int i = 0; i < str.length; i++) {
                    demo.fontSize = size[i];
                    tf2.setText(String.valueOf(demo.fontSize));
                    tf1.setText(demo.text = str[i]);
                    demo.repaint();
                    try {
                        thread.sleep(5555);
                    } catch (InterruptedException e) { return; }
                }
            }
            thread = null;
        }
    } // End DemoControls
} // End Stars3D