Лови примерчик:
| Код |
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class My extends JFrame
{
JTree m_tree = null;
JPopupMenu m_popup = null;
public My()
{
getContentPane().setLayout(new BorderLayout());
m_tree = new JTree();
m_popup = new JPopupMenu();
m_popup.add(new AbstractAction("Start") {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Start");
}
});
m_popup.add(new AbstractAction("Stop") {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Stop");
}
});
m_popup.add(new AbstractAction("Pause") {
public void actionPerformed(ActionEvent e) {
String s = JOptionPane.showInputDialog(null, "Pause");
if(s==null)
System.out.println("Cancel pressed");
}
});
m_tree.add(m_popup);
m_tree.addMouseListener(new PopupTrigger());
getContentPane().add(new JScrollPane(m_tree));
setBounds(100,100,200,300);
}
class PopupTrigger extends MouseAdapter
{
public void mouseReleased(MouseEvent e)
{
if(e.isPopupTrigger())
{
int x = e.getX();
int y = e.getY();
m_popup.show(m_tree, x, y);
}
}
}
public static void main(String[] args)
{
My my = new My();
my.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
my.setVisible(true);
}
}
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