关键词：
package com.dragon.component;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
/**
* @author Harry
* @date 2018/2/24
* Time: 14:37
* Desc: InfiniteProgressPanel
*/
public class InfiniteProgressPanel extends JComponent implements MouseListener
/**
*
*/
private static final long serialVersionUID = 1L;
protected Area[] ticker = null;
protected Thread animation = null;
protected boolean started = false;
protected int alphaLevel = 0;
protected int rampDelay = 300;
protected float shield = 0.70f;
protected String text = "";
protected int barsCount = 14;
protected float fps = 15.0f;
protected RenderingHints hints = null;
public InfiniteProgressPanel()
this("");
public InfiniteProgressPanel(String text)
this(text, 14);
public InfiniteProgressPanel(String text, int barsCount)
this(text, barsCount, 0.70f);
public InfiniteProgressPanel(String text, int barsCount, float shield)
this(text, barsCount, shield, 15.0f);
public InfiniteProgressPanel(String text, int barsCount, float shield, float fps)
this(text, barsCount, shield, fps, 300);
public InfiniteProgressPanel(String text, int barsCount, float shield, float fps, int rampDelay)
this.text = text;
this.rampDelay = rampDelay >= 0 ? rampDelay : 0;
this.shield = shield >= 0.0f ? shield : 0.0f;
this.fps = fps > 0.0f ? fps : 15.0f;
this.barsCount = barsCount > 0 ? barsCount : 14;
this.hints = new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
this.hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
this.hints.put(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
public void setText(String text)
repaint();
this.text = text;
public String getText()
return text;
public void start()
addMouseListener(this);
setVisible(true);
ticker = buildTicker();
animation = new Thread(new Animator(true));
animation.start();
public void stop()
if (animation != null)
animation.interrupt();
animation = null;
animation = new Thread(new Animator(false));
animation.start();
public void interrupt()
if (animation != null)
animation.interrupt();
animation = null;
removeMouseListener(this);
setVisible(false);
@Override
public void paintComponent(Graphics g)
if (started)
int width = getWidth();
int height = getHeight();
double maxY = 0.0;
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHints(hints);
g2.setColor(new Color(255, 255, 255, (int) (alphaLevel * shield)));
g2.fillRect(0, 0, getWidth(), getHeight());
for (int i = 0; i < ticker.length; i++)
int channel = 224 - 128 / (i + 1);
g2.setColor(new Color(channel, channel, channel, alphaLevel));
g2.fill(ticker[i]);
Rectangle2D bounds = ticker[i].getBounds2D();
if (bounds.getMaxY() > maxY)
maxY = bounds.getMaxY();
if (text != null && text.length() > 0)
FontRenderContext context = g2.getFontRenderContext();
TextLayout layout = new TextLayout(text, getFont(), context);
Rectangle2D bounds = layout.getBounds();
g2.setColor(getForeground());
layout.draw(g2, (float) (width - bounds.getWidth()) / 2,
(float) (maxY + layout.getLeading() + 2 * layout.getAscent()));
private Area[] buildTicker()
Area[] ticker = new Area[barsCount];
Point2D.Double center = new Point2D.Double((double) getWidth() / 2, (double) getHeight() / 2);
double fixedAngle = 2.0 * Math.PI / (barsCount);
for (double i = 0.0; i < barsCount; i++)
Area primitive = buildPrimitive();
AffineTransform toCenter = AffineTransform.getTranslateInstance(center.getX(), center.getY());
AffineTransform toBorder = AffineTransform.getTranslateInstance(45.0, -6.0);
AffineTransform toCircle = AffineTransform.getRotateInstance(-i * fixedAngle, center.getX(), center.getY());
AffineTransform toWheel = new AffineTransform();
toWheel.concatenate(toCenter);
toWheel.concatenate(toBorder);
primitive.transform(toWheel);
primitive.transform(toCircle);
ticker[(int) i] = primitive;
return ticker;
private Area buildPrimitive()
Rectangle2D.Double body = new Rectangle2D.Double(6, 0, 30, 12);
Ellipse2D.Double head = new Ellipse2D.Double(0, 0, 12, 12);
Ellipse2D.Double tail = new Ellipse2D.Double(30, 0, 12, 12);
Area tick = new Area(body);
tick.add(new Area(head));
tick.add(new Area(tail));
return tick;
protected class Animator implements Runnable
private boolean rampUp = true;
protected Animator(boolean rampUp)
this.rampUp = rampUp;
@Override
public void run()
Point2D.Double center = new Point2D.Double((double) getWidth() / 2, (double) getHeight() / 2);
double fixedIncrement = 2.0 * Math.PI / (barsCount);
AffineTransform toCircle = AffineTransform.getRotateInstance(fixedIncrement, center.getX(), center.getY());
long start = System.currentTimeMillis();
if (rampDelay == 0)
alphaLevel = rampUp ? 255 : 0;
started = true;
boolean inRamp = rampUp;
while (!Thread.interrupted())
if (!inRamp)
for (int i = 0; i < ticker.length; i++)
ticker[i].transform(toCircle);
repaint();
if (rampUp)
if (alphaLevel < 255)
alphaLevel = (int) (255 * (System.currentTimeMillis() - start) / rampDelay);
if (alphaLevel >= 255)
alphaLevel = 255;
inRamp = false;
else if (alphaLevel > 0)
alphaLevel = (int) (255 - (255 * (System.currentTimeMillis() - start) / rampDelay));
if (alphaLevel <= 0)
alphaLevel = 0;
break;
try
Thread.sleep(inRamp ? 10 : (int) (1000 / fps));
catch (InterruptedException ie)
break;
Thread.yield();
if (!rampUp)
started = false;
repaint();
setVisible(false);
removeMouseListener(InfiniteProgressPanel.this);
@Override
public void mouseClicked(MouseEvent e)
@Override
public void mousePressed(MouseEvent e)
@Override
public void mouseReleased(MouseEvent e)
@Override
public void mouseEntered(MouseEvent e)
@Override
public void mouseExited(MouseEvent e)
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