这是我的主要重写，其中包含以下值得注意的更改：
import javax.swing.*;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
public class ZoomPanel extends JPanel {
private static final int STEP = 40;
private int iter = 0;
private long cumulativeTiMetaken = 0;
public static void main(String[] args) {
final JFrame frame = new JFrame("Image zoom");
final ZoomPanel zoomPanel = new ZoomPanel();
frame.getContentPane().add(zoomPanel);
final Ticker t = new Ticker(zoomPanel);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
t.done();
frame.dispose();
}
});
t.start();
frame.setLocation(new Point(640, 0));
frame.pack();
frame.setVisible(true);
}
private final Color[][] model = new Color[8][8];
public ZoomPanel() {
setSize(new Dimension(400, 400));
setMinimumSize(new Dimension(400, 400));
setPreferredSize(new Dimension(400, 400));
setOpaque(true);
}
private void setColorAt(int x, int y, Color pixelColor) {
model[x][y] = pixelColor;
repaint(40 + x * STEP, 45 + y * STEP, 40 + (x * STEP) - 3, 45 + (y * STEP) - 3);
}
private Color getColorAt(int x, int y) {
return model[x][y];
}
public void paintComponent(Graphics g) {
long start = System.currentTimeMillis();
if (!SwingUtilities.isEventDispatchThread()) {
throw new RuntimeException("Repaint attempt is not on event dispatch thread");
}
final Graphics2D g2 = (Graphics2D) g;
g2.setColor(getBackground());
try {
for (int x = 0; x < 8; x++) {
for (int y = 0; y < 8; y++) {
g2.setColor(model[x][y]);
Ellipse2D e = new Ellipse2D.Double(40 + x * STEP, 45 + y * STEP, STEP - 3, STEP - 3);
g2.fill(e);
g2.setColor(Color.GRAY);
g2.draw(e);
}
}
} catch (Exception e) {
e.printStackTrace();
}
iter++;
g2.setColor(Color.black);
long stop = System.currentTimeMillis();
cumulativeTiMetaken += stop - start;
StringBuilder sb = new StringBuilder();
sb.append(iter)
.append(" frames in ")
.append((double) (cumulativeTiMetaken) / 1000)
.append("s.");
System.out.println(sb);
}
private static class Ticker extends Thread {
private final Robot robot;
public boolean update = true;
private final ZoomPanel view;
public Ticker(ZoomPanel zoomPanel) {
view = zoomPanel;
try {
robot = new Robot();
} catch (AWTException e) {
throw new RuntimeException(e);
}
}
public void done() {
update = false;
}
public void run() {
int runCount = 0;
while (update) {
runCount++;
if (runCount % 100 == 0) {
System.out.println("Ran ticker " + runCount + " times");
}
final Point p = MouseInfo.getPointerInfo().getLocation();
Rectangle rect = new Rectangle(p.x - 4, p.y - 4, 8, 8);
final BufferedImage capture = robot.createScreenCapture(rect);
for (int x = 0; x < 8; x++) {
for (int y = 0; y < 8; y++) {
final Color pixelColor = new Color(capture.getRGB(x, y));
if (!pixelColor.equals(view.getColorAt(x, y))) {
final int finalX = x;
final int finalY = y;
SwingUtilities.invokelater(new Runnable() {
public void run() {
view.setColorAt(finalX, finalY, pixelColor);
}
});
}
}
}
}
}
}
}
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