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package java2d.demos.Mix;
import static java.awt.Color.LIGHT_GRAY;
import static java.awt.Color.WHITE;
import static java.lang.Math.random;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.GeneralPath;
import java.awt.geom.Path2D;
import java.awt.geom.PathIterator;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java2d.AnimatingControlsSurface;
import java2d.CustomControls;
import javax.swing.AbstractButton;
import javax.swing.JComboBox;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
/**
* Animated Bezier Curve shape with images at the control points.
* README.txt file scrolling up. Composited Image fading in and out.
*/
@SuppressWarnings("serial")
public class BezierScroller extends AnimatingControlsSurface {
private static String appletStrs[] = { " ", "J2Ddemo",
"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 Color blueBlend = new Color(0, 0, 255, 100);
private static Font font = new Font(Font.SERIF, Font.PLAIN, 12);
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 List<String> vector, appletVector;
private float alpha = 0.2f;
private int alphaDirection;
protected boolean doImage, doShape, doText;
protected boolean buttonToggle;
/*
* Using this to scale down globe.png since we want a smaller version,
* I know it is 100 x 160 and has a transparent pixel.
*/
private Image scaled(Image src) {
int sw = src.getWidth(null);
int sh = src.getHeight(null);
int dw = sw/5;
int dh = sh/5;
BufferedImage bi =
new BufferedImage(dw, dh, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = bi.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);
g2d.drawImage(src, 0, 0, dw, dh, 0, 0, sw, sh, null);
g2d.dispose();
return bi;
}
@SuppressWarnings("LeakingThisInConstructor")
public BezierScroller() {
setBackground(WHITE);
doShape = doText = true;
hotj_img = scaled(getImage("globe.png"));
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) (random() * 4.0 + 2.0);
} else if (newpt >= limit) {
newpt = 2.0f * limit - newpt;
deltas[index] = -(float) (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 ArrayList<String>(100);
for (int i = 0; i < 100; i++) {
appletVector.add(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.add(str);
}
} catch (Exception e) {
Logger.getLogger(BezierScroller.class.getName()).log(
Level.SEVERE,
null, e);
reader = null;
}
} else {
if (!appletVector.isEmpty()) {
vector.add(str = appletVector.remove(0));
}
}
return str;
}
@Override
public void reset(int w, int h) {
for (int i = 0; i < animpts.length; i += 2) {
animpts[i + 0] = (float) (random() * w);
animpts[i + 1] = (float) (random() * h);
deltas[i + 0] = (float) (random() * 6.0 + 4.0);
deltas[i + 1] = (float) (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 ArrayList<String>(nStrs);
ix = (int) (random() * (w - 80));
iy = (int) (random() * (h - 80));
}
@Override
public void step(int w, int h) {
if (doText && vector.isEmpty()) {
getFile();
}
if (doText) {
String s = getLine();
if (s == null || vector.size() == nStrs && !vector.isEmpty()) {
vector.remove(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) (random() * (w - 80));
iy = (int) (random() * (h - 80));
}
}
if (doImage) {
if ((imgX += 80) == 800) {
imgX = 0;
}
}
}
@Override
public void render(int w, int h, Graphics2D g2) {
if (doText) {
g2.setColor(LIGHT_GRAY);
g2.setFont(font);
float y = yy;
//for (int i = 0; i < vector.size(); i++) {
for (String string : vector) {
g2.drawString(string, 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(Path2D.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) == PathIterator.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 final class DemoControls extends CustomControls implements
ActionListener {
BezierScroller demo;
JToolBar toolbar;
JComboBox combo;
public DemoControls(BezierScroller demo) {
super(demo.name);
this.demo = demo;
add(toolbar = new JToolBar());
toolbar.setFloatable(false);
addTool("Image", false);
addTool("Shape", true);
addTool("Text", true);
}
public void addTool(String str, boolean state) {
JToggleButton b =
(JToggleButton) toolbar.add(new JToggleButton(str));
b.setFocusPainted(false);
b.setSelected(state);
b.addActionListener(this);
int width = b.getPreferredSize().width;
Dimension prefSize = new Dimension(width, 21);
b.setPreferredSize(prefSize);
b.setMaximumSize(prefSize);
b.setMinimumSize(prefSize);
}
@Override
public void actionPerformed(ActionEvent e) {
JToggleButton b = (JToggleButton) e.getSource();
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.running()) {
demo.repaint();
}
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 40);
}
@Override
@SuppressWarnings("SleepWhileHoldingLock")
public void run() {
Thread me = Thread.currentThread();
int i = 0;
while (thread == me) {
try {
Thread.sleep(250);
} catch (InterruptedException e) {
return;
}
if (demo.buttonToggle) {
((AbstractButton) toolbar.getComponentAtIndex(i++ % 2)).
doClick();
demo.buttonToggle = false;
}
}
thread = null;
}
} // End DemoControls
} // End BezierScroller