任何人都知道如何在克隆 JPanel 中重新绘制。我正在使用 CLONE，所以我可以 REPAINT() 一个，另一个会自动执行相同的操作。
如果我在原始面板或克隆面板中移动鼠标，我的代码只会绘制原始 JPanel，
但是如果我在克隆面板中移动鼠标，这个 jpanel 不会绘制。
提前致谢
代码：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ProcessorClone {
public static void main(String[] args) {
JFrame aWindow = new JFrame();
aWindow.setBounds(300, 200, 300, 100);
aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Container content = aWindow.getContentP
aWindow.setVisible(true);
CardViewer panel02=new CardViewer();
CardViewer panel01= (CardViewer) panel02.clone();
aWindow.setLayout(new BorderLayout());
aWindow.add(panel01,BorderLayout.NORTH);
aWindow.add(panel02,BorderLayout.SOUTH);
panel01.setBackground(Color.RED);
panel02.setBackground(Color.blue);
panel01.repaint();
panel02.repaint();
panel01.validate();
panel02.validate();
}
}
class CardViewer extends JPanel implements MouseListener,MouseMotionListener, Cloneable {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel mContentPaneBorder;
private JPanel mContentPane;
private JButton FileButton=new JButton("AAA");
private Point p;
public CardViewer(){
super();
this.add(FileButton);
addMouseListener(this);
addMouseMotionListener(this);
}
@Override
public void mouseClicked(MouseEvent arg0) {
System.out.println("mouseClicked");
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
System.out.println("mousePressed");
p = null;
repaint();
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseDragged(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent e) {
System.out.println("mouseMoved");
p = e.getPoint();
this.repaint();
this.validate();
}
public void paint(Graphics g) {
System.out.println( g.getClass() );
if (p != null) {
Dimension d = getSize();
int xc = d.width / 2;
int yc = d.height / 2;
g.drawLine(p.x, p.y, p.x, p.y);
this.setBackground(Color.pink);
}
}
public Object clone () {
// First make exact bitwise copy
CardViewer copy = null;
try {
copy = (CardViewer)super.clone();
} catch (CloneNotSupportedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return copy;
}
}