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Context menu on JTable

Posted on 2004-09-30
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Last Modified: 2008-01-09

Hi, I want to have a context menu so when the user right-clicks on my jtable I can offer a menu of choices. When a choice is selected it will operate on the row that was clicked on so I need to pick up both the menu choice and the row that was right-clicked on.  Can you tell me how to do this?

Thanks!
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Question by:adg
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8 Comments
 
LVL 37

Expert Comment

by:zzynx
ID: 12187774
Add a mouseListener to your jTable and react on mouseClicked()
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LVL 92

Expert Comment

by:objects
ID: 12187775
Add a MouseListener to your table and have it get the row clicked on according to the click coords, and then popup a JPopupMenu.
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LVL 37

Accepted Solution

by:
zzynx earned 150 total points
ID: 12187834
1) Add mouselistener

        jTable.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jTableMouseClicked(evt);
            }
        });

2) React

    private void jTableMouseClicked(java.awt.event.MouseEvent evt) {
        if ( SwingUtilities.isRightMouseButton(evt) ) {     // Was it a right-mouse click ?

            // a. Select the table item where one right-clicked
            //     if the right click is not on (one of) the selected item(s)
            int row = jTable.rowAtPoint(evt.getPoint());
            if (row!=-1) {
                int selected[] = jTable.getSelectedRows();
                boolean clickOnSelectedOne = false;
                for (int i=0; i<selected.length; i++) {
                    if (row==selected[i]) {
                        clickOnSelectedOne = true;
                        break;
                    }
                }
                if (!clickOnSelectedOne)
                    jTable.setRowSelectionInterval(row, row);
            }

            // b. Create the right menu
            popupMenu = new JPopupMenu();
            // Here your add the menu items you want...

            // c. show it
            popupMenu.show(evt.getComponent(), evt.getX(), evt.getY());
        }

Remark:
You can omit part a) if not needed.
Part a) just makes sure that right-clicking an item also selects that item. Maybe that's not needed in your app.
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LVL 3

Author Comment

by:adg
ID: 12187905
Thanks for the quick response!

>> just makes sure that right-clicking an item also selects that item. Maybe that's not needed in your app.

I do need that! I'll give it a try and get back to you - probably in around 10 hours.

 

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LVL 92

Assisted Solution

by:objects
objects earned 100 total points
ID: 12187912
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LVL 3

Author Comment

by:adg
ID: 12193966

Of course, JPopupMenu! I should have known. I gotta read more about Swing. :*)

Thanks both for the exellent examples.  I'm splitting the points, appreciate the help!
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LVL 37

Expert Comment

by:zzynx
ID: 12194014
Thanks for accepting
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LVL 92

Expert Comment

by:objects
ID: 12194473
(:
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