我正在尝试创建一个手动滚动器,当您在 JPanel 上拖动鼠标时它会滚动。到目前为止,我无法改变看法。这是我的代码:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class HandScroller extends JFrame {
public static void main(String[] args) {
new HandScroller();
}
public HandScroller() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
final JPanel background = new JPanel();
background.add(new JLabel("Hand"));
background.add(new JLabel("Scroller"));
background.add(new JLabel("Test"));
background.add(new JLabel("Click"));
background.add(new JLabel("To"));
background.add(new JLabel("Scroll"));
final JScrollPane scrollPane = new JScrollPane(background);
MouseAdapter mouseAdapter = new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
JViewport viewPort = scrollPane.getViewport();
Point vpp = viewPort.getViewPosition();
vpp.translate(10, 10);
background.scrollRectToVisible(new Rectangle(vpp, viewPort.getSize()));
}
};
scrollPane.getViewport().addMouseListener(mouseAdapter);
scrollPane.getViewport().addMouseMotionListener(mouseAdapter);
setContentPane(scrollPane);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
}
我认为这会将视图在 x 和 y 方向上移动 10 倍,但它根本没有做任何事情。还有什么我应该做的吗?
谢谢。