How to prevent other events from triggering when closing JPopupMenu by clicking on it?

Question

There are some context menu properties of the context menu that I would like to play using JPopupMenu:

• When the menu is open and you click elsewhere, the menu closes.
• When the menu is open and you click elsewhere, nothing else happens.

I have the first part in order. But when I click elsewhere, other events may occur. For example, let's say I have a button A that performs some action, B. Currently, if JPopupMenu is open and I press A, JPopupMenu closes and B is executed. I would prefer JPopupMenu to close and B NOT execute. Is it possible?

thank

Answer 1

Considering what was said in your question and comments, I approach your problem in one of the following ways.

Technically, you have two options:

1. Turn on the popup when the user moves the mouse outside the popup. This way you have no problem clicking the user as the popup disappears.

2. Grab this particular mouse event globally and use the event on the left if the popup is visible. I will show this specific solution in the example below.

    import java.awt.AWTEvent;
    import java.awt.Toolkit;
    import java.awt.event.AWTEventListener;
    import java.awt.event.ActionEvent;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    import javax.swing.AbstractAction;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JMenu;
    import javax.swing.JPanel;
    import javax.swing.JPopupMenu;
    import javax.swing.SwingUtilities;

    public class DisableClickWhenPopupVisibleTest
    {
        public static void main(String[] args)
        {
            SwingUtilities.invokeLater(new Runnable()
            {
                @Override
                public void run()
                {               
                    final JPopupMenu popup = new JPopupMenu();
                    popup.add(new JMenu("aAaa"));
                    JPanel contentPane = new JPanel();
                    contentPane.add(popup);
                    JButton b = new JButton();
                    b.setAction(new AbstractAction("Button")
                    {
                        private static final long serialVersionUID = 1L;
                        @Override
                        public void actionPerformed(ActionEvent e)
                        {
                            System.out.println("b actionPerformed");
                        }
                    });
                    contentPane.add(b);
                    contentPane.addMouseListener(new MouseAdapter() {
                        @Override
                        public void mousePressed(MouseEvent e)
                        {
                            showPopup(e);
                        }
                        @Override
                        public void mouseReleased(MouseEvent e)
                        {
                            showPopup(e);
                        }
                        private void showPopup(MouseEvent e)
                        {
                            if(e.isPopupTrigger())
                                popup.show(e.getComponent(), e.getX(), e.getY());
                        }
                    });
                    //use global mouse event capture to disable left click on anything when popup is visible
                    Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
                        @Override
                        public void eventDispatched(AWTEvent event)
                        {
                            MouseEvent me = (MouseEvent)event;
                            if(me.getID() == MouseEvent.MOUSE_PRESSED)
                            {
                                System.out.println("eventDispatched popup.vis="+popup.isVisible());
                                if( me.getButton() == MouseEvent.BUTTON3)
                                {   
                                    System.out.println("BUTTON3");
                                }   
                                else if(me.getButton() == MouseEvent.BUTTON1)
                                {
                                    System.out.println("BUTTON1");
                                    if(popup.isVisible())
                                        me.consume();
                                }
                            }
                        }
                    }, AWTEvent.MOUSE_EVENT_MASK);                      
                    JFrame f = new JFrame();
                    f.setContentPane(contentPane);
                    f.setSize(400, 300);
                    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    f.setVisible(true);
                }
            });
        }
    }

, , . , , . , . Toolkit.getDefaultToolkit().addAWTEventListener(...). , , .

Answer 2

... - .

UIManager.put("PopupMenu.consumeEventOnClose", Boolean.TRUE);

, MOUSE_PRESSED, MOUSE_CLICKED . , mousePressed() mouseReleased(). , mouseReleased()

private boolean pressed = false;

@Override
public void mousePressed(MouseEvent e) {
    pressed = true;
}

@Override
public void mouseReleased(MouseEvent e) {
    if (pressed) {
         // do click stuff
    }
    pressed = false;
}