filebot/source/net/sourceforge/tuned/ui/ProgressIndicator.java

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Java
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package net.sourceforge.tuned.ui;
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import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
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import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
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import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.Timer;
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public class ProgressIndicator extends JComponent {
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private float radius = 4.0f;
private int shapeCount = 3;
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private float strokeWidth = 2f;
private Stroke stroke = new BasicStroke(strokeWidth, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND);
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private Color progressShapeColor = Color.orange;
private Color backgroundShapeColor = new Color(0f, 0f, 0f, 0.25f);
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private final Rectangle2D frame = new Rectangle2D.Double();
private final Ellipse2D circle = new Ellipse2D.Double();
private final Dimension baseSize = new Dimension(32, 32);
private double alpha = 0;
private double speed = 24;
private Timer updateTimer;
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public ProgressIndicator() {
setPreferredSize(baseSize);
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addComponentListener(new ComponentAdapter() {
@Override
public void componentShown(ComponentEvent e) {
startAnimation();
}
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@Override
public void componentHidden(ComponentEvent e) {
stopAnimation();
}
});
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}
public void animateOnce() {
if ((alpha += (speed / 1000)) >= 1) {
alpha -= Math.floor(alpha);
}
}
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@Override
public void paintComponent(Graphics g) {
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Graphics2D g2d = (Graphics2D) g;
double a = Math.min(getWidth(), getHeight());
g2d.scale(a / baseSize.width, a / baseSize.height);
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
frame.setFrame(radius, radius, baseSize.width - radius * 2 - 1, baseSize.height - radius * 2 - 1);
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paintShapes(g2d);
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}
private void paintShapes(Graphics2D g2d) {
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circle.setFrame(frame);
g2d.setStroke(stroke);
g2d.setPaint(backgroundShapeColor);
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g2d.draw(circle);
Point2D center = new Point2D.Double(frame.getCenterX(), frame.getMinY());
circle.setFrameFromCenter(center, new Point2D.Double(center.getX() + radius, center.getY() + radius));
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g2d.setStroke(stroke);
g2d.setPaint(progressShapeColor);
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// base rotation
g2d.rotate(getTheta(alpha, 1.0), frame.getCenterX(), frame.getCenterY());
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double theta = getTheta(1, shapeCount);
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for (int i = 0; i < shapeCount; i++) {
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g2d.rotate(theta, frame.getCenterX(), frame.getCenterY());
g2d.fill(circle);
}
}
private double getTheta(double value, double max) {
return (value / max) * 2 * Math.PI;
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}
public void startAnimation() {
if (updateTimer == null) {
updateTimer = new Timer(20, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
animateOnce();
repaint();
}
});
updateTimer.start();
}
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}
public void stopAnimation() {
if (updateTimer != null) {
updateTimer.stop();
updateTimer = null;
}
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}
public void setShapeCount(int indeterminateShapeCount) {
this.shapeCount = indeterminateShapeCount;
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}
public void setSpeed(double speed) {
this.speed = speed;
}
public double getSpeed() {
return speed;
}
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}