BezierAnimationPanelpublic class BezierAnimationPanel extends JPanel implements Runnable
| Fields Summary |
|---|
| Color | backgroundColor | | Color | outerColor | | Color | gradientColorA | | Color | gradientColorB | | boolean | bgChanged | | GradientPaint | gradient | | public final int | NUMPTS | | float[] | animpts | | float[] | deltas | | float[] | staticpts | | float[] | movepts | | BufferedImage | img | | Rectangle | bounds | | Thread | anim |
| Constructors Summary |
|---|
public BezierAnimationPanel()BezierAnimationPanel Constructor
addHierarchyListener(
new HierarchyListener() {
public void hierarchyChanged(HierarchyEvent e) {
if(isShowing()) {
start();
} else {
stop();
}
}
}
);
setBackground(getBackgroundColor());
|
| Methods Summary |
|---|
| 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 java.awt.Color | getBackgroundColor()
return backgroundColor;
| | public java.awt.Color | getGradientColorA()
return gradientColorA;
| | public java.awt.Color | getGradientColorB()
return gradientColorB;
| | public java.awt.Color | getOuterColor()
return outerColor;
| | public void | paint(java.awt.Graphics g)
synchronized (this) {
Graphics2D g2d = (Graphics2D) g;
if (img != null) {
int imgw = img.getWidth();
int imgh = img.getHeight();
g2d.setComposite(AlphaComposite.Src);
g2d.drawImage(img, null, 0, 0);
}
}
| | public void | run()
Thread me = Thread.currentThread();
while (getSize().width <= 0) {
try {
anim.sleep(500);
} 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();
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(bounds.x-5, bounds.y-5, bounds.x + bounds.width + 5, bounds.y + bounds.height + 5);
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 | setBackgroundColor(java.awt.Color c)
if(c != null) {
backgroundColor = c;
setBackground(c);
bgChanged = true;
}
| | public void | setGradientColorA(java.awt.Color c)
if(c != null) {
gradientColorA = c;
}
| | public void | setGradientColorB(java.awt.Color c)
if(c != null) {
gradientColorB = c;
}
| | public void | setOuterColor(java.awt.Color c)
if(c != null) {
outerColor = c;
}
| | 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();
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