如果保留
AffineTransform在绘制图像时使用的副本，则可以使用
AffineTransform.inverseTransform（Point2D ptSrc，Point2D
ptDst）
将设备空间坐标转换回用户空间
编辑
：如果捕获当前
Graphics2D绘画的变换，请当心将
Graphics2D其重新用于同一窗口/面板的多个轻量级子项，因为这样变换将相对于父组件，而鼠标坐标将相对于父组件这个孩子。您需要捕获对
转换 所做的 更改 ，而不是其最终值。例：
import java.awt.BasicStroke;import java.awt.Color;import java.awt.Component;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Point;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.MouseMotionAdapter;import java.awt.geom.AffineTransform;import java.awt.geom.NoninvertibleTransformException;import java.awt.image.BufferedImage;import java.io.IOException;import java.net.MalformedURLException;import java.net.URL;import javax.imageio.ImageIO;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JComponent;import javax.swing.Jframe;public class Main { public static void main(String[] args) throws MalformedURLException, IOException { Jframe frame = new Jframe(); Box box = new Box(BoxLayout.Y_AXIS); BufferedImage image = ImageIO.read(new URL("http://sstatic.net/so/img/logo.png")); AffineTransform xfrm1 = AffineTransform.getScaleInstance(0.95, 1.25); xfrm1.rotate(-0.3); box.add(new ImageView(image, xfrm1)); AffineTransform xfrm2 = AffineTransform.getShearInstance(0.1, 0.2); xfrm2.scale(1.3, 0.9); box.add(new ImageView(image, xfrm2)); frame.add(box); frame.pack(); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.setVisible(true); }}@SuppressWarnings("serial")class ImageView extends JComponent { @Override public void paintComponent(Graphics g) { Graphics2D g2d = (Graphics2D) g; try { paintXfrm = g2d.getTransform(); paintXfrm.invert(); g2d.translate(getWidth() / 2, getHeight() / 2); g2d.transform(xfrm); g2d.translate(image.getWidth() * -0.5, image.getHeight() * -0.5); paintXfrm.concatenate(g2d.getTransform()); g2d.drawImage(image, 0, 0, this); } catch (NoninvertibleTransformException ex) { ex.printStackTrace(); } } @Override public Dimension getPreferredSize() { return new Dimension(image.getWidth() * 2, image.getHeight() * 2); } ImageView(final BufferedImage image, final AffineTransform xfrm) { this.canvas = image.createGraphics(); canvas.setColor(Color.BLACK); canvas.setStroke(new BasicStroke(3.0f)); this.image = image; this.xfrm = xfrm; addMouseListener(new MouseAdapter() { @Override public void mousePressed(MouseEvent e) { try { mouseDownCoord = e.getPoint(); paintXfrm.inverseTransform(mouseDownCoord, mouseDownCoord); } catch (NoninvertibleTransformException ex) { } } @Override public void mouseExited(MouseEvent e) { mouseDownCoord = null; } }); addMouseMotionListener(new MouseMotionAdapter() { @Override public void mouseDragged(MouseEvent e) { Point p = e.getPoint(); try { paintXfrm.inverseTransform(p, p); if (mouseDownCoord != null) { canvas.drawLine(mouseDownCoord.x, mouseDownCoord.y, p.x, p.y); for (Component sibling: getParent().getComponents()) { sibling.repaint(); } } mouseDownCoord = p; } catch (NoninvertibleTransformException ex) { ex.printStackTrace(); } } }); } private Graphics2D canvas; private BufferedImage image; private AffineTransform xfrm; private AffineTransform paintXfrm; private Point mouseDownCoord;}
