swingset.BezierAnimationPanel Maven / Gradle / Ivy
/*
* Copyright (c) 2004 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
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* You acknowledge that this software is not designed, licensed or intended
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package swingset;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;
import java.awt.geom.GeneralPath;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
/**
* BezierAnimationPanel
*
* @author Jim Graham
* @author Jeff Dinkins (removed dynamic setting changes, made swing friendly)
*/
class BezierAnimationPanel extends JPanel implements Runnable {
Color backgroundColor = new Color(0, 0, 153);
Color outerColor = new Color(255, 255, 255);
Color gradientColorA = new Color(255, 0, 101);
Color gradientColorB = new Color(255, 255, 0);
boolean bgChanged = false;
GradientPaint gradient = null;
public final int NUMPTS = 6;
float animpts[] = new float[NUMPTS * 2];
float deltas[] = new float[NUMPTS * 2];
float staticpts[] = {
50.0f, 0.0f,
150.0f, 0.0f,
200.0f, 75.0f,
150.0f, 150.0f,
50.0f, 150.0f,
0.0f, 75.0f,
};
float movepts[] = new float[staticpts.length];
BufferedImage img;
Rectangle bounds = null;
Thread anim;
private final Object lock = new Object();
/**
* BezierAnimationPanel Constructor
*/
public BezierAnimationPanel() {
addHierarchyListener(
new HierarchyListener() {
public void hierarchyChanged(HierarchyEvent e) {
if(isShowing()) {
start();
} else {
stop();
}
}
}
);
setBackground(getBackgroundColor());
}
public boolean isOpaque() {
return true;
}
public Color getGradientColorA() {
return gradientColorA;
}
public void setGradientColorA(Color c) {
if(c != null) {
gradientColorA = c;
}
}
public Color getGradientColorB() {
return gradientColorB;
}
public void setGradientColorB(Color c) {
if(c != null) {
gradientColorB = c;
}
}
public Color getOuterColor() {
return outerColor;
}
public void setOuterColor(Color c) {
if(c != null) {
outerColor = c;
}
}
public Color getBackgroundColor() {
return backgroundColor;
}
public void setBackgroundColor(Color c) {
if(c != null) {
backgroundColor = c;
setBackground(c);
bgChanged = true;
}
}
public void start() {
Dimension size = getSize();
for (int i = 0; i < animpts.length; i += 2) {
animpts[i + 0] = (float) (Math.random() * size.width);
animpts[i + 1] = (float) (Math.random() * size.height);
deltas[i + 0] = (float) (Math.random() * 4.0 + 2.0);
deltas[i + 1] = (float) (Math.random() * 4.0 + 2.0);
if (animpts[i + 0] > size.width / 6.0f) {
deltas[i + 0] = -deltas[i + 0];
}
if (animpts[i + 1] > size.height / 6.0f) {
deltas[i + 1] = -deltas[i + 1];
}
}
anim = new Thread(this);
anim.setPriority(Thread.MIN_PRIORITY);
anim.start();
}
public synchronized void stop() {
anim = null;
notify();
}
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() * 3.0 + 2.0);
} else if (newpt >= (float) limit) {
newpt = 2.0f * limit - newpt;
deltas[index] = - (float) (Math.random() * 3.0 + 2.0);
}
pts[index] = newpt;
}
public void run() {
Thread me = Thread.currentThread();
while (getSize().width <= 0) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
return;
}
}
Graphics2D g2d = null;
Graphics2D BufferG2D = null;
Graphics2D ScreenG2D = null;
BasicStroke solid = new BasicStroke(9.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 9.0f);
GeneralPath gp = new GeneralPath(GeneralPath.WIND_NON_ZERO);
int rule = AlphaComposite.SRC_OVER;
AlphaComposite opaque = AlphaComposite.SrcOver;
AlphaComposite blend = AlphaComposite.getInstance(rule, 0.9f);
AlphaComposite set = AlphaComposite.Src;
int frame = 0;
// int frametmp = 0;
Dimension oldSize = getSize();
Shape clippath = null;
while (anim == me) {
Dimension size = getSize();
if (size.width != oldSize.width || size.height != oldSize.height) {
img = null;
clippath = null;
if (BufferG2D != null) {
BufferG2D.dispose();
BufferG2D = null;
}
if (ScreenG2D != null) {
ScreenG2D.dispose();
ScreenG2D = null;
}
}
oldSize = size;
if (img == null) {
img = (BufferedImage) createImage(size.width, size.height);
}
if (BufferG2D == null) {
BufferG2D = img.createGraphics();
BufferG2D.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_DEFAULT);
BufferG2D.setClip(clippath);
}
g2d = BufferG2D;
float[] ctrlpts;
for (int i = 0; i < animpts.length; i += 2) {
animate(animpts, deltas, i + 0, size.width);
animate(animpts, deltas, i + 1, size.height);
}
ctrlpts = animpts;
int len = ctrlpts.length;
gp.reset();
// int dir = 0;
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;
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();
synchronized (lock) {
g2d.setComposite(set);
g2d.setBackground(backgroundColor);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
if (bgChanged || bounds == null) {
bounds = new Rectangle(0, 0, getWidth(), getHeight());
bgChanged = false;
}
g2d.clearRect(0, 0, getWidth(), getHeight());
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setColor(outerColor);
g2d.setComposite(opaque);
g2d.setStroke(solid);
g2d.draw(gp);
g2d.setPaint(gradient);
if (!bgChanged) {
bounds = gp.getBounds();
} else {
bounds = new Rectangle(0, 0, getWidth(), getHeight());
bgChanged = false;
}
gradient = new GradientPaint(bounds.x, bounds.y, gradientColorA, bounds.x + bounds.width,
bounds.y + bounds.height, gradientColorB, true);
g2d.setComposite(blend);
g2d.fill(gp);
}
if (g2d == BufferG2D) {
repaint();
}
++frame;
Thread.yield();
}
if (g2d != null) {
g2d.dispose();
}
}
public void paint(Graphics g) {
synchronized (lock) {
Graphics2D g2d = (Graphics2D) g;
if (img != null) {
g2d.setComposite(AlphaComposite.Src);
g2d.drawImage(img, null, 0, 0);
}
}
}
}
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