Reposition Jtable Column Header

Question

I have to disable right click on JTableHeader so that user cannot right click over column header and drag to reposition the columns. Do we have any trick to do that? Just to mention left mouse button click works good but when user does RMB and drags the column, the column is moved and is repainted over the other columns when mouse is released.

Any help is appreciatted.

hmm .. sounds like a bug in tableHeader/UI to me: right dragging shouldn't trigger a column move at all. I think, I have seen the move being incomplet (on right dragging), but can't reliably reproduce. You might consider to file an issue in oracles java bug parade. — kleopatra, Aug 17 '12 at 15:36

score 1 · Answer 1 · edited May 23 '17 at 12:18

Triggering column drag/resizing with the right button clearly is a bug IMO.

A whacky workaround is to hook into the mouse/Motion/Listener installed by the uidelegate and silently eat all events which are not the left button. Something like (note: a more robust install of this wrapping listener which would survive a LAF switch is outlined in a recent answer):

public static class BugHook implements MouseListener, MouseMotionListener {

    private JTableHeader header;
    private MouseListener mouseDelegate;
    private MouseMotionListener motionDelegate;

    public BugHook(JTableHeader header) {
        this.header = header;
        MouseListener[] ls = header.getMouseListeners();
        for (int i = 0; i < ls.length; i++) {
            header.removeMouseListener(ls[i]);
            String name = ls[i].getClass().getName();
            if (name.contains("TableHeaderUI")) {
                this.mouseDelegate = ls[i];
                ls[i] = this;
            }
        }
        for (MouseListener l : ls) {
            header.addMouseListener(l);
        }

        MouseMotionListener[] motionLs = header.getMouseMotionListeners();
        for (int i = 0; i < motionLs.length; i++) {
            header.removeMouseMotionListener(motionLs[i]);
            String name = motionLs[i].getClass().getName();
            if (name.contains("TableHeaderUI")) {
                this.motionDelegate = motionLs[i];
                motionLs[i] = this;
            }
        }
        for (MouseMotionListener l : motionLs) {
            header.addMouseMotionListener(l);
        }

    }

    // methods delegation left buttons only
    @Override
    public void mousePressed(MouseEvent e) {
        if (!SwingUtilities.isLeftMouseButton(e)) return;
        mouseDelegate.mousePressed(e);
    }

    @Override
    public void mouseDragged(MouseEvent e) {
        if (!SwingUtilities.isLeftMouseButton(e)) return;
        motionDelegate.mouseDragged(e);
    }
    @Override
    public void mouseReleased(MouseEvent e) {
        if (!SwingUtilities.isLeftMouseButton(e)) return;
        mouseDelegate.mouseReleased(e);
    }

    /// ---------- methods delegating always
    @Override
    public void mouseClicked(MouseEvent e) {
        mouseDelegate.mouseClicked(e);
    }
    @Override
    public void mouseEntered(MouseEvent e) {
        mouseDelegate.mouseEntered(e);
    }

    @Override
    public void mouseExited(MouseEvent e) {
        mouseDelegate.mouseExited(e);
    }
    @Override
    public void mouseMoved(MouseEvent e) {
        motionDelegate.mouseMoved(e);
    }

}

score 0 · Answer 2 · answered Feb 03 '13 at 10:09

0

I tried with Java versions 1.7.0_11 and 1.6.0_38 and doing this:

table.getTableHeader().setReorderingAllowed(false);

will lock the columns in place. Are you perhaps using older Java version or doing the disabling some other way?

answered Feb 03 '13 at 10:09

janih

2,214
2
18
24

that's not solving the problem (as far as I understand it): the columns _should_ be draggable, but triggered only by the _left_ mouseButton, the _right_ button should have no effect. – kleopatra Feb 03 '13 at 11:47

Reposition Jtable Column Header

2 Answers2