import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class ScrollPaneMouseCoordinates {
    public static void main(String[] args) {
        JFrame frame = new JFrame("JScrollPane鼠标坐标示例");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 300);

        // 创建一个包含大量内容的面板
        JPanel contentPanel = new JPanel();
        contentPanel.setLayout(new GridLayout(20, 20));
        for (int i = 0; i < 400; i++) {
            contentPanel.add(new JLabel("Label " + i));
        }

        // 将面板放入JScrollPane
        JScrollPane scrollPane = new JScrollPane(contentPanel);
        
        // 添加鼠标监听器
        scrollPane.addMouseMotionListener(new MouseAdapter() {
            @Override
            public void mouseMoved(MouseEvent e) {
                // 获取鼠标相对于JScrollPane的坐标
                Point panePoint = e.getPoint();
                
                // 获取视口(viewport)的视图位置
                JViewport viewport = scrollPane.getViewport();
                Point viewPosition = viewport.getViewPosition();
                
                // 计算相对于内容的坐标（考虑滚动偏移）
                int contentX = panePoint.x + viewPosition.x;
                int contentY = panePoint.y + viewPosition.y;
                
                System.out.println("相对于JScrollPane的坐标: (" + panePoint.x + ", " + panePoint.y + ")");
                System.out.println("相对于内容的坐标: (" + contentX + ", " + contentY + ")");
            }
        });

        frame.add(scrollPane);
        frame.setVisible(true);
    }
}