MouseMotionListener接口用于接收组件上的鼠标移动事件。处理鼠标移动事件的类需要实现此接口。
接口声明
以下是java.awt.event.MouseMotionListener接口的声明 -
public interface MouseMotionListener
extends EventListener
接口方法
| 编号 | 方法 | 描述说明 |
|---|---|---|
| 1 | void mouseDragged(MouseEvent e) |
在组件上按下鼠标按钮然后拖动时调用。 |
| 2 | void mouseMoved(MouseEvent e) |
将鼠标光标移动到组件但未按下任何按钮时调用。 |
方法继承
该类从以下接口继承方法 -
java.awt.event.EventListener
MouseMotionListener示例
使用编辑器创建以下Java程序：MouseMotionListenerDemo.java
package com.yiibai.swing.listener;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MouseMotionListenerDemo {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
public MouseMotionListenerDemo() {
prepareGUI();
}
public static void main(String[] args) {
MouseMotionListenerDemo swingListenerDemo = new MouseMotionListenerDemo();
swingListenerDemo.showMouseMotionListenerDemo();
}
private void prepareGUI() {
mainFrame = new JFrame("Java SWING MouseMotionListener示例(yiibai.com)");
mainFrame.setSize(400, 400);
mainFrame.setLayout(new GridLayout(3, 1));
headerLabel = new JLabel("", JLabel.CENTER);
statusLabel = new JLabel("", JLabel.CENTER);
statusLabel.setSize(350, 100);
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
});
controlPanel = new JPanel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showMouseMotionListenerDemo() {
headerLabel.setText("Listener in action: MouseMotionListener");
JPanel panel = new JPanel();
panel.setBackground(Color.blue);
panel.setLayout(new FlowLayout());
panel.addMouseMotionListener(new CustomMouseMotionListener());
JLabel msglabel = new JLabel("欢迎您来到易百网Java/Swing教程~", JLabel.CENTER);
panel.add(msglabel);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
class CustomMouseMotionListener implements MouseMotionListener {
public void mouseDragged(MouseEvent e) {
statusLabel.setText("Mouse Dragged: (" + e.getX() + ", " + e.getY() + ")");
}
public void mouseMoved(MouseEvent e) {
statusLabel.setText("Mouse Moved: (" + e.getX() + ", " + e.getY() + ")");
}
}
}
执行上面示例代码，得到以下结果：
