Prevent hide popup menu

[deep pat]

Hi all,
I've created a popup menu with comboboxes which is brought forward upon a button click. I would like to prevent it from hiding when i check or on check combobox(es).

Please give me an advice coz for the moment my popup menu disappears each time i check/uncheck a combo.

   
if (jScrollPane == null) {
            jScrollPane = new JScrollPane();
            jScrollPane.setViewportView(getJTableClient());
            grid_button= new JButton(new ImageIcon("./images/grid.jpg"));
            grid_button.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(menu_context == null){
                        menu_context = new JPopupMenu();
                        for (int i=0; i<jTableClient.getColumnCount();i++){
                            menuItem = new JCheckBoxMenuItem(jTableClient.getColumnName(i), true);
                            menu_context.add(menuItem);
                        }
                    }
                    Dimension buttonSize = grid_button.getSize();
                    int xPos = grid_button.getComponentOrientation().isLeftToRight() ?
                        buttonSize.width- menu_context.getPreferredSize().width: 0;
                    if(!menu_context.isVisible())
                        menu_context.show(grid_button, xPos, buttonSize.height);
                    
                 
                }
            });
            jScrollPane.setCorner(JScrollPane.UPPER_TRAILING_CORNER,grid_button);
            jScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
                    
        }
 

I also tried the trick found at another forum

   
JComboBox box = new JComboBox();
Object preventHide = box.getClientProperty("doNotCancelPopup");
box.putClientProperty("doNotCancelPopup",preventHide);

But it's not working.

Thanks in advance

[Brian Cole]

deep pat wrote:
I also tried the trick found at another forum

JComboBox box = new JComboBox();
Object preventHide = box.getClientProperty("doNotCancelPopup");
box.putClientProperty("doNotCancelPopup",preventHide);

But it's not working.

Surely you mean someOtherThing.putClientProperty("doNotCancelPopup", preventHide) on line 3, no?

[deep pat]

Surely you mean someOtherThing.putClientProperty("doNotCancelPopup", preventHide) on line 3, no?

Well, i really dont know, i tried using other things (the popup menu itself or the button which calls it) at line 3 but of no avail.

I saw the trick supposed to prevent the popup menu from hiding on this site.
webpage

As fact, I'm trying to create a JTable with a button on the top right of the scrollbar which opens a popup menu with comboboxes and table column names (As in JXTable but using JTable ). I have the desired result except the popup disappears each time i click on the combo.

I'm surely missing something but what?

[Martin Lindgren]

I am struggling with this issue as well. Does anyone have further advice on how to solve it? Did you solve it Deep pat? Not sure if you will notice this late bump but worth a shot ;-)

[Darryl Burke]

Martin, welcome to the Ranch! To get better help sooner, post a SSCCE (Short, Self Contained, Correct (Compilable), Example) that demonstrates the problem (and don't forget to UseCodeTags <-- link ).

[Martin Lindgren]

Thank you!

This little piece of code will explain my problem.

import javax.swing.*;
import java.awt.event.*;

public class PopupTest {

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(400, 400);
        frame.setVisible(true);
        String[] list = {"1", "2", "3", "4",};
        JComboBox comb = new JComboBox(list);
        final JPopupMenu pop = new JPopupMenu();
        pop.add(comb);
        frame.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                System.out.println("mousePressed");
                pop.show(e.getComponent(), e.getX(), e.getY());
            }
        });
    }
}

Click anywhere to make the popup window with the combobox appear. Then when clickin on the combobox, the actual popup disappears. After some research I thought I found a solution which was the one that Brian Cole mentioned:

JComboBox comb = new JComboBox();  
    Object preventHide = comb.getClientProperty("doNotCancelPopup");  
    pop.putClientProperty("doNotCancelPopup",preventHide);  

But that didn't change anything.

Any suggestions? I know that one solution is to skip the popup frame and make a window instead, but that will need a lot of rework in the code
which I would rather not re-implement.

[Michael Dunn]

//pop.show(e.getComponent(), e.getX(), e.getY());
pop.setLocation(e.getX(), e.getY());
pop.setVisible(true);

you'll have to work out what's best for you to dispose the popup

one way might be to add this to the frame's listener

@Override
public void mouseEntered(MouseEvent me){
  if(pop.isVisible()) pop.setVisible(false);
}