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