fadeanim.java

java2d的源码分析

/*
 * @(#)FadeAnim.java	1.29 99/05/07
 *
 * Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 * 
 * 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 AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE 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 SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

package demos.Composite;

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.awt.event.*;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import AnimatingContext;
import DemoSurface;
import DemoPanel;
import CustomControls;


/**
 * Animation of compositing shapes, text and images fading in and out.
 */
public class FadeAnim extends DemoSurface implements AnimatingContext, CustomControls {

    private static TexturePaint texture;
    static {
        int w = 10; int h = 10;
        BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D gi = bi.createGraphics();
        Color oc = Color.blue; Color ic = Color.green;
        gi.setPaint(new GradientPaint(0,0,oc,w*.35f,h*.35f,ic));
        gi.fillRect(0, 0, w/2, h/2);
        gi.setPaint(new GradientPaint(w,0,oc,w*.65f,h*.35f,ic));
        gi.fillRect(w/2, 0, w/2, h/2);
        gi.setPaint(new GradientPaint(0,h,oc,w*.35f,h*.65f,ic));
        gi.fillRect(0, h/2, w/2, h/2);
        gi.setPaint(new GradientPaint(w,h,oc,w*.65f,h*.65f,ic));
        gi.fillRect(w/2, h/2, w/2, h/2);
        texture = new TexturePaint(bi,new Rectangle(0,0,w,h));
    }
    private static BasicStroke bs = new BasicStroke(6); 
    private static Font fonts[] = {
                new Font("Times New Roman", Font.PLAIN, 64),
                new Font("serif", Font.BOLD + Font.ITALIC, 24),
                new Font("Courier", Font.BOLD, 36),
                new Font("Arial", Font.BOLD + Font.ITALIC, 48),
                new Font("Helvetica", Font.PLAIN, 52)};
    private static String strings[] = {
                "Alpha", "Composite", "Src", "SrcOver", 
                "SrcIn", "SrcOut", "Clear", "DstOver", "DstIn" };
    private static String imgs[] = { 
                "jumptojavastrip.gif", "duke.gif", "star7.gif" };
    private static Paint paints[] = { 
                Color.red, Color.blue, Color.green, Color.magenta, 
                Color.orange, Color.pink, Color.cyan, texture,
                Color.yellow, Color.lightGray, Color.white};
    private Vector vector = new Vector(20);
    private DemoControls controls;
    private int numShapes, numStrings, numImages;


    public FadeAnim() {
        setBackground(Color.black);
        setStrings(2);
        setImages(3);
        setShapes(8);
        controls = new DemoControls(this);
    }


    public String[] getCustomControlsConstraints() {
        return new String[] { BorderLayout.EAST };
    }


    public Component[] getCustomControls() {
        return new Component[] { (Component) controls };
    }


    public void customControlsThread(int state) {
        if (state == CustomControls.START) {
            controls.start();
        } else if (state == CustomControls.STOP) {
            controls.stop();
        }
    }


    public void setImages(int num) {

        if (num < numImages) {
            Vector v = new Vector(vector.size());
            for (int i = 0; i < vector.size(); i++) {
                if (((ObjectData) vector.get(i)).object instanceof Image) {
                    v.addElement(vector.get(i));
                }
            }
            vector.removeAll(v);
            v.setSize(num);
            vector.addAll(v);
        } else {
            Dimension d = getSize();
            for (int i = numImages; i < num; i++) {
                Object obj = getImage(imgs[i % imgs.length]);
                if (imgs[i % imgs.length].equals("jumptojavastrip.gif")) {
                    int iw = ((Image) obj).getWidth(null);
                    int ih = ((Image) obj).getHeight(null);
                    BufferedImage bimg = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
                    bimg.createGraphics().drawImage((Image) obj, 0, 0, null);
                    obj = bimg;
                }
                ObjectData od = new ObjectData(obj, Color.black);
                od.reset(d.width, d.height);
                vector.addElement(od);
            }
        }
        numImages = num;
    }
        

    public void setStrings(int num) {

        if (num < numStrings) {
            Vector v = new Vector(vector.size());
            for (int i = 0; i < vector.size(); i++) {
                if (((ObjectData) vector.get(i)).object instanceof TextData) {
                    v.addElement(vector.get(i));
                }
            }
            vector.removeAll(v);
            v.setSize(num);
            vector.addAll(v);
        } else {
            Dimension d = getSize();
            for (int i = numStrings; i < num; i++) {
                int j = i % fonts.length;
                int k = i % strings.length;
                Object obj = new TextData(strings[k], fonts[j], this); 
                ObjectData od = new ObjectData(obj, paints[i%paints.length]);
                od.reset(d.width, d.height);
                vector.addElement(od);
            }
        }
        numStrings = num;
    }
        

    public void setShapes(int num) {

        if (num < numShapes) {
            Vector v = new Vector(vector.size());
            for (int i = 0; i < vector.size(); i++) {
                if (((ObjectData) vector.get(i)).object instanceof Shape) {
                    v.addElement(vector.get(i));
                }
            }
            vector.removeAll(v);
            v.setSize(num);
            vector.addAll(v);
        } else {
            Dimension d = getSize();
            for (int i = numShapes; i < num; i++) {
                Object obj = null;
                switch (i % 7) {
                    case 0 : obj = new GeneralPath(); break;
                    case 1 : obj = new Rectangle2D.Double(); break;
                    case 2 : obj = new Ellipse2D.Double(); break;
                    case 3 : obj = new Arc2D.Double(); break;
                    case 4 : obj = new RoundRectangle2D.Double(); break;
                    case 5 : obj = new CubicCurve2D.Double(); break;
                    case 6 : obj = new QuadCurve2D.Double(); break;
                }
                ObjectData od = new ObjectData(obj, paints[i%paints.length]);
                od.reset(d.width, d.height);
                vector.addElement(od);
            }
        } 
        numShapes = num;
    }


    public void reset(int w, int h) {
        for (int i = 0; i < vector.size(); i++) {
            ((ObjectData) vector.get(i)).reset(w, h);
        }
    }


    public void step(int w, int h) {
        for (int i = 0; i < vector.size(); i++) {
            ((ObjectData) vector.get(i)).step(w, h);
        }
    }


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

        for (int i = 0; i < vector.size(); i++) {
            ObjectData od = (ObjectData) vector.get(i);
            AlphaComposite ac = AlphaComposite.getInstance(
                                   AlphaComposite.SRC_OVER, od.alpha);
            g2.setComposite(ac);
            g2.setPaint(od.paint);
            g2.translate(od.x, od.y);

            if (od.object instanceof Image) {
                g2.drawImage((Image) od.object, 0, 0, this);
            } else if (od.object instanceof TextData) {
                g2.setFont(((TextData) od.object).font);
                g2.drawString(((TextData) od.object).string, 0, 0);
            } else if (od.object instanceof QuadCurve2D 
                    || od.object instanceof CubicCurve2D) 
            {
                g2.setStroke(bs);
                g2.draw((Shape) od.object);
            } else if (od.object instanceof Shape) {
                g2.fill((Shape) od.object);
            }
            g2.translate(-od.x, -od.y);