mouseMoved事件无法获取光标的位置

Question

新手在这里

这是我的代码，我希望当光标进入绿色jpanel（这里是＆＃34; p2＆＃34;）时，程序将有另一个jpanel（这里是＆＃34; p1＆＃34;）来显示一些信息关于对象。 （像工具提示）

但是当光标进入JPanel p2时... mouseMove无法获取光标的位置......只有当我删除JPanel p2时它才有效。请帮帮我们

注意：它仍在JPanel p2的边框上工作;

＆＃13;

＆＃13;

import javax.management.Attribute;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
import javax.swing.JTextPane;
import javax.swing.border.EmptyBorder;
import javax.swing.text.AttributeSet.FontAttribute;

import org.w3c.dom.events.EventTarget;
import org.w3c.dom.events.MouseEvent;
import org.w3c.dom.views.AbstractView;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.MouseInfo;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.text.AttributedCharacterIterator;
import java.util.Locale;

public class InterfaceSubject extends JFrame {

	public JPanel contentPane, p1, p2;
	public JButton bt1;
	public JLabel lb2;
	public JTextPane tp1, tp2, tp3;

	public InterfaceSubject() {
		this.setResizable(false);
		setTitle("Demo");
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setBounds(100, 20, 1024, 768);

		bt1 = new JButton();
		p1 = new JPanel();
		p1.setLayout(new BorderLayout());
        p1.setBackground(Color.yellow);


		p2 = new JPanel();
		GridLayout gr = new GridLayout();
		gr.setColumns(1);
		gr.setRows(3);
		p2.setLayout(gr);

		lb2 = new JLabel();

		tp1 = new JTextPane();
		tp1.setForeground(Color.BLUE);
		tp1.setBackground(Color.green);
		tp1.setText("MMH: 212121");

		tp2 = new JTextPane();
		tp2.setForeground(Color.BLUE);
		tp2.setBackground(Color.green);
		tp2.setText("Tên MH: Hello");

		tp3 = new JTextPane();
		tp3.setForeground(Color.BLUE);
		tp3.setBackground(Color.green);
		tp3.setText("TC : 1");

		contentPane = new ImagePanel(
				new ImageIcon("images\\formtkb.jpg").getImage());
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

		p2.setBounds(60, 121, 125, 75);

		p2.add(tp1);
		p2.add(tp2);
		p2.add(tp3);

		contentPane.add(p2);

		setContentPane(contentPane);

		contentPane.setLayout(null);

		this.addMouseMotionListener(new MouseMotionListener() {

			@Override
			public void mouseMoved(java.awt.event.MouseEvent arg0) {

				if ((arg0.getX()) >= (60) && arg0.getX() <= (60 + 125)) {
					if ((arg0.getY()) >= (121 + 25)
							&& (arg0.getY()) <= (121 + 100)) {
						p1.setVisible(true);
						p1.setBounds(new Rectangle(arg0.getPoint(),
								new Dimension(200, 200)));
						lb2.setText(arg0.getX() + " / " + arg0.getY());

						p1.add(lb2, BorderLayout.SOUTH);
						contentPane.add(p1);
					} else {
						p1.setVisible(false);
					}
				} else {
					p1.setVisible(false);
				}

			}

			@Override
			public void mouseDragged(java.awt.event.MouseEvent arg0) {
				// TODO Auto-generated method stub

			}
		});

	}

}

class ImagePanel extends JPanel {

	/**
		 * 
		 */
	private Image img;

	public ImagePanel(String img) {
		this(new ImageIcon(img).getImage());
	}

	public ImagePanel(Image img) {
		this.img = img;
		Dimension size = new Dimension(img.getWidth(null), img.getHeight(null));
		setPreferredSize(size);
		setMinimumSize(size);
		setMaximumSize(size);
		setSize(size);
		setLayout(null);

	}

	public void paintComponent(Graphics g) {
		g.drawImage(img, 0, 100, null);
	}

}

＆＃13;

＆＃13;

＆＃13;

Answer 1

为您的面板添加mouseMotionListener。像

    p1.addMouseMotionListener(new MouseMotionListener() {
            @Override
            public void mouseMoved(java.awt.event.MouseEvent arg0) {

            }
    });


    p2.addMouseMotionListener(new MouseMotionListener() {
            @Override
            public void mouseMoved(java.awt.event.MouseEvent arg0) {

            }
    });