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*
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*
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* - Redistributions in binary form must reproduce the above copyright
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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package java2d.demos.Paint;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.LinearGradientPaint;
import java.awt.MultipleGradientPaint.CycleMethod;
import java.awt.Paint;
import java.awt.RadialGradientPaint;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Point2D;
import java2d.AnimatingControlsSurface;
import java2d.CustomControls;
import javax.swing.JComboBox;
/**
* GradientPaint animation.
*/
@SuppressWarnings("serial")
public class GradAnim extends AnimatingControlsSurface {
private static final int BASIC_GRADIENT = 0;
private static final int LINEAR_GRADIENT = 1;
private static final int RADIAL_GRADIENT = 2;
private static final int FOCUS_GRADIENT = 3;
private static final int MAX_HUE = 256 * 6;
private animval x1, y1, x2, y2;
private int hue = (int) (Math.random() * MAX_HUE);
private int gradientType;
public GradAnim() {
setBackground(Color.white);
setControls(new Component[] { new DemoControls(this) });
x1 = new animval(0, 300, 2, 10);
y1 = new animval(0, 300, 2, 10);
x2 = new animval(0, 300, 2, 10);
y2 = new animval(0, 300, 2, 10);
gradientType = BASIC_GRADIENT;
}
@Override
public void reset(int w, int h) {
x1.newlimits(0, w);
y1.newlimits(0, h);
x2.newlimits(0, w);
y2.newlimits(0, h);
}
@Override
public void step(int w, int h) {
x1.anim();
y1.anim();
x2.anim();
y2.anim();
hue = (hue + (int) (Math.random() * 10)) % MAX_HUE;
}
public static Color getColor(int hue) {
int leg = (hue / 256) % 6;
int step = (hue % 256) * 2;
int falling = (step < 256) ? 255 : 511 - step;
int rising = (step < 256) ? step : 255;
int r, g, b;
r = g = b = 0;
switch (leg) {
case 0:
r = 255;
break;
case 1:
r = falling;
g = rising;
break;
case 2:
g = 255;
break;
case 3:
g = falling;
b = rising;
break;
case 4:
b = 255;
break;
case 5:
b = falling;
r = rising;
break;
}
return new Color(r, g, b);
}
@Override
public void render(int w, int h, Graphics2D g2) {
float fx1 = x1.getFlt();
float fy1 = y1.getFlt();
float fx2 = x2.getFlt();
float fy2 = y2.getFlt();
if ((fx1 == fx2) && (fy1 == fy2)) {
// just to prevent the points from being coincident
fx2++;
fy2++;
}
Color c1 = getColor(hue);
Color c2 = getColor(hue + 256 * 3);
Paint gp;
switch (gradientType) {
case BASIC_GRADIENT:
default:
gp = new GradientPaint(fx1, fy1, c1,
fx2, fy2, c2,
true);
break;
case LINEAR_GRADIENT: {
float[] fractions = new float[] { 0.0f, 0.2f, 1.0f };
Color c3 = getColor(hue + 256 * 2);
Color[] colors = new Color[] { c1, c2, c3 };
gp = new LinearGradientPaint(fx1, fy1,
fx2, fy2,
fractions, colors,
CycleMethod.REFLECT);
}
break;
case RADIAL_GRADIENT: {
float[] fractions = { 0.0f, 0.2f, 0.8f, 1.0f };
Color c3 = getColor(hue + 256 * 2);
Color c4 = getColor(hue + 256 * 4);
Color[] colors = new Color[] { c1, c2, c3, c4 };
float radius = (float) Point2D.distance(fx1, fy1, fx2, fy2);
gp = new RadialGradientPaint(fx1, fy1, radius,
fractions, colors,
CycleMethod.REFLECT);
}
break;
case FOCUS_GRADIENT: {
float[] fractions = { 0.0f, 0.2f, 0.8f, 1.0f };
Color c3 = getColor(hue + 256 * 4);
Color c4 = getColor(hue + 256 * 2);
Color[] colors = new Color[] { c1, c2, c3, c4 };
float radius = (float) Point2D.distance(fx1, fy1, fx2, fy2);
float max = Math.max(w, h);
// This function will map the smallest radius to
// max/10 when the points are next to each other,
// max when the points are max distance apart,
// and >max when they are further apart (in which
// case the focus clipping code in RGP will clip
// the focus to be inside the radius).
radius = max * (((radius / max) * 0.9f) + 0.1f);
gp = new RadialGradientPaint(fx2, fy2, radius,
fx1, fy1,
fractions, colors,
CycleMethod.REPEAT);
}
break;
}
g2.setPaint(gp);
g2.fillRect(0, 0, w, h);
g2.setColor(Color.yellow);
g2.drawLine(x1.getInt(), y1.getInt(), x2.getInt(), y2.getInt());
}
public final class animval {
float curval;
float lowval;
float highval;
float currate;
float lowrate;
float highrate;
public animval(int lowval, int highval,
int lowrate, int highrate) {
this.lowval = lowval;
this.highval = highval;
this.lowrate = lowrate;
this.highrate = highrate;
this.curval = randval(lowval, highval);
this.currate = randval(lowrate, highrate);
}
public float randval(float low, float high) {
return (float) (low + Math.random() * (high - low));
}
public float getFlt() {
return curval;
}
public int getInt() {
return (int) curval;
}
public void anim() {
curval += currate;
clip();
}
public void clip() {
if (curval > highval) {
curval = highval - (curval - highval);
if (curval < lowval) {
curval = highval;
}
currate = -randval(lowrate, highrate);
} else if (curval < lowval) {
curval = lowval + (lowval - curval);
if (curval > highval) {
curval = lowval;
}
currate = randval(lowrate, highrate);
}
}
public void newlimits(int lowval, int highval) {
this.lowval = lowval;
this.highval = highval;
clip();
}
}
public static void main(String argv[]) {
createDemoFrame(new GradAnim());
}
class DemoControls extends CustomControls implements ActionListener {
GradAnim demo;
JComboBox combo;
@SuppressWarnings("LeakingThisInConstructor")
public DemoControls(GradAnim demo) {
super(demo.name);
this.demo = demo;
combo = new JComboBox();
combo.addActionListener(this);
combo.addItem("2-color GradientPaint");
combo.addItem("3-color LinearGradientPaint");
combo.addItem("4-color RadialGradientPaint");
combo.addItem("4-color RadialGradientPaint with focus");
combo.setSelectedIndex(0);
add(combo);
}
@Override
public void actionPerformed(ActionEvent e) {
int index = combo.getSelectedIndex();
if (index >= 0) {
demo.gradientType = index;
}
if (!demo.animating.running()) {
demo.repaint();
}
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 41);
}
@Override
@SuppressWarnings("SleepWhileHoldingLock")
public void run() {
Thread me = Thread.currentThread();
while (thread == me) {
for (int i = 0; i < combo.getItemCount(); i++) {
combo.setSelectedIndex(i);
try {
Thread.sleep(4444);
} catch (InterruptedException e) {
return;
}
}
}
thread = null;
}
}
}