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Java Source | 2002-09-06 | 11.8 KB | 350 lines |
- /*
- * Copyright (c) 2002 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:
- *
- * -Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct 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 AND ITS LICENSORS SHALL NOT
- * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF 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.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)BezierScroller.java 1.33 02/06/13
- */
-
- package java2d.demos.Mix;
-
- import java.awt.*;
- import java.awt.event.*;
- import java.awt.geom.GeneralPath;
- import java.awt.geom.PathIterator;
- import java.awt.font.FontRenderContext;
- import java.awt.font.TextLayout;
- import java.awt.image.BufferedImage;
- import java.io.File;
- import java.io.FileReader;
- import java.io.BufferedReader;
- import java.util.Vector;
- import javax.swing.*;
- import java2d.AnimatingControlsSurface;
- import java2d.CustomControls;
-
-
- /**
- * Animated Bezier Curve shape with images at the control points.
- * README.txt file scrolling up. Composited Image fading in and out.
- */
- public class BezierScroller extends AnimatingControlsSurface {
-
- private static String appletStrs[] =
- { " ", "Java2Demo",
- "BezierScroller - Animated Bezier Curve shape with images",
- "For README.txt file scrolling run in application mode", " " };
- private static final int NUMPTS = 6;
- private static Color greenBlend = new Color(0, 255, 0, 100);
- private static Font font = new Font("serif", Font.PLAIN, 12);
- private static Color blueBlend = new Color(0, 0, 255, 100);
- private static BasicStroke bs = new BasicStroke(3.0f);
- private static Image hotj_img;
- private static BufferedImage img;
- private static final int UP = 0;
- private static final int DOWN = 1;
-
- private float animpts[] = new float[NUMPTS * 2];
- private float deltas[] = new float[NUMPTS * 2];
- private BufferedReader reader;
- private int nStrs;
- private int strH;
- private int yy, ix, iy, imgX;
- private Vector vector, appletVector;
- private float alpha = 0.2f;
- private int alphaDirection;
- protected boolean doImage, doShape, doText;
- protected boolean buttonToggle;
-
-
- public BezierScroller() {
- setBackground(Color.white);
- doShape = doText = true;
- hotj_img = getImage("HotJava-16.gif");
- Image image = getImage("jumptojavastrip.png");
- int iw = image.getWidth(this);
- int ih = image.getHeight(this);
- img = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
- img.createGraphics().drawImage(image, 0, 0, this);
- setControls(new Component[] { new DemoControls(this) });
- }
-
-
- public void animate(float[] pts, float[] deltas, int index, int limit) {
- float newpt = pts[index] + deltas[index];
- if (newpt <= 0) {
- newpt = -newpt;
- deltas[index] = (float) (Math.random() * 4.0 + 2.0);
- } else if (newpt >= (float) limit) {
- newpt = 2.0f * limit - newpt;
- deltas[index] = - (float) (Math.random() * 4.0 + 2.0);
- }
- pts[index] = newpt;
- }
-
-
- public void getFile() {
- try {
- String fName = "README.txt";
- if ((reader = new BufferedReader(new FileReader(fName))) != null) {
- getLine();
- }
- } catch (Exception e) { reader = null; }
- if (reader == null) {
- appletVector = new Vector(100);
- for (int i = 0; i < 100; i++) {
- appletVector.addElement(appletStrs[i%appletStrs.length]);
- }
- getLine();
- }
- buttonToggle = true;
- }
-
-
- public String getLine() {
- String str = null;
- if (reader != null) {
- try {
- if ((str = reader.readLine()) != null) {
- if (str.length() == 0) {
- str = " ";
- }
- vector.addElement(str);
- }
- } catch (Exception e) { e.printStackTrace(); reader = null; }
- } else {
- if (appletVector.size() != 0) {
- vector.addElement(str = (String) appletVector.remove(0));
- }
- }
- return str;
- }
-
-
- public void reset(int w, int h) {
- for (int i = 0; i < animpts.length; i += 2) {
- animpts[i + 0] = (float) (Math.random() * w);
- animpts[i + 1] = (float) (Math.random() * h);
- deltas[i + 0] = (float) (Math.random() * 6.0 + 4.0);
- deltas[i + 1] = (float) (Math.random() * 6.0 + 4.0);
- if (animpts[i + 0] > w / 2.0f) {
- deltas[i + 0] = -deltas[i + 0];
- }
- if (animpts[i + 1] > h / 2.0f) {
- deltas[i + 1] = -deltas[i + 1];
- }
- }
- FontMetrics fm = getFontMetrics(font);
- strH = fm.getAscent()+fm.getDescent();
- nStrs = h/strH+2;
- vector = new Vector(nStrs);
- ix = (int) (Math.random() * (w - 80));
- iy = (int) (Math.random() * (h - 80));
- }
-
-
- public void step(int w, int h) {
- if (doText && vector.size() == 0) {
- getFile();
- }
- if (doText) {
- String s = getLine();
- if (s == null || vector.size() == nStrs && vector.size() != 0) {
- vector.removeElementAt(0);
- }
- yy = (s == null) ? 0 : h - vector.size() * strH;
- }
-
- for (int i = 0; i < animpts.length && doShape; i += 2) {
- animate(animpts, deltas, i + 0, w);
- animate(animpts, deltas, i + 1, h);
- }
- if (doImage && alphaDirection == UP) {
- if ((alpha += 0.025) > .99) {
- alphaDirection = DOWN;
- alpha = 1.0f;
- }
- } else if (doImage && alphaDirection == DOWN) {
- if ((alpha -= .02) < 0.01) {
- alphaDirection = UP;
- alpha = 0;
- ix = (int) (Math.random() * (w - 80));
- iy = (int) (Math.random() * (h - 80));
- }
- }
- if (doImage) {
- if ((imgX += 80) == 800) {
- imgX = 0;
- }
- }
- }
-
-
-
- public void render(int w, int h, Graphics2D g2) {
-
- if (doText) {
- g2.setColor(Color.lightGray);
- g2.setFont(font);
- float y = yy;
- for (int i = 0; i < vector.size(); i++) {
- g2.drawString((String)vector.get(i), 1, y += strH);
- }
- }
-
- if (doShape) {
- float[] ctrlpts = animpts;
- int len = ctrlpts.length;
- float prevx = ctrlpts[len - 2];
- float prevy = ctrlpts[len - 1];
- float curx = ctrlpts[0];
- float cury = ctrlpts[1];
- float midx = (curx + prevx) / 2.0f;
- float midy = (cury + prevy) / 2.0f;
- GeneralPath gp = new GeneralPath(GeneralPath.WIND_NON_ZERO);
- gp.moveTo(midx, midy);
- for (int i = 2; i <= ctrlpts.length; i += 2) {
- float x1 = (midx + curx) / 2.0f;
- float y1 = (midy + cury) / 2.0f;
- prevx = curx;
- prevy = cury;
- if (i < ctrlpts.length) {
- curx = ctrlpts[i + 0];
- cury = ctrlpts[i + 1];
- } else {
- curx = ctrlpts[0];
- cury = ctrlpts[1];
- }
- midx = (curx + prevx) / 2.0f;
- midy = (cury + prevy) / 2.0f;
- float x2 = (prevx + midx) / 2.0f;
- float y2 = (prevy + midy) / 2.0f;
- gp.curveTo(x1, y1, x2, y2, midx, midy);
- }
- gp.closePath();
-
- g2.setColor(blueBlend);
- g2.setStroke(bs);
- g2.draw(gp);
- g2.setColor(greenBlend);
- g2.fill(gp);
-
- PathIterator pi = gp.getPathIterator(null);
- float pts[] = new float[6];
- while ( !pi.isDone() ) {
- if (pi.currentSegment(pts) == pi.SEG_CUBICTO) {
- g2.drawImage(hotj_img, (int) pts[0], (int) pts[1], this);
- }
- pi.next();
- }
- }
-
- if (doImage) {
- AlphaComposite ac = AlphaComposite.getInstance(
- AlphaComposite.SRC_OVER, alpha);
- g2.setComposite(ac);
- g2.drawImage(img.getSubimage(imgX,0,80,80), ix, iy, this);
- }
- }
-
-
- public static void main(String argv[]) {
- createDemoFrame(new BezierScroller());
- }
-
-
- static class DemoControls extends CustomControls implements ActionListener {
-
- BezierScroller demo;
- JToolBar toolbar;
- JComboBox combo;
-
- public DemoControls(BezierScroller demo) {
- super(demo.name);
- this.demo = demo;
- setBackground(Color.gray);
- add(toolbar = new JToolBar());
- toolbar.setFloatable(false);
- addTool("Image", false);
- addTool("Shape", true);
- addTool("Text", true);
- }
-
-
- public void addTool(String str, boolean state) {
- JButton b = (JButton) toolbar.add(new JButton(str));
- b.setBackground(state ? Color.green : Color.lightGray);
- b.setSelected(state);
- b.addActionListener(this);
- }
-
-
- public void actionPerformed(ActionEvent e) {
- JButton b = (JButton) e.getSource();
- b.setSelected(!b.isSelected());
- b.setBackground(b.isSelected() ? Color.green : Color.lightGray);
- if (b.getText().equals("Image")) {
- demo.doImage = b.isSelected();
- } else if (b.getText().equals("Shape")) {
- demo.doShape = b.isSelected();
- } else {
- demo.doText = b.isSelected();
- }
- if (demo.animating.thread == null) {
- demo.repaint();
- }
- }
-
- public Dimension getPreferredSize() {
- return new Dimension(200,37);
- }
-
-
- public void run() {
- Thread me = Thread.currentThread();
- int i = 0;
- while (thread == me) {
- try {
- thread.sleep(250);
- } catch (InterruptedException e) { return; }
- if (demo.buttonToggle) {
- ((JButton) toolbar.getComponentAtIndex(i++%2)).doClick();
- demo.buttonToggle = false;
- }
- }
- thread = null;
- }
- } // End DemoControls
- } // End BezierScroller
-