Java Utililty Methods JPopupMenu

List of utility methods to do JPopupMenu

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Description

The list of methods to do JPopupMenu are organized into topic(s).

Method

voidrefreshPopup(JPopupMenu popup)
Mysterious calls to pack(), invalidate() and validate() ;-) 
popup.pack();
popup.invalidate();
Component c = popup.getParent();
if (c != null) {
    c.validate();
voidremoveConsecutiveSeparators(JPopupMenu popupMenu)
Removes all consecutive separators from the given menu. 
for (int i = 1; i < popupMenu.getComponentCount(); i++) {
    if (isPopupMenuSeparator(popupMenu.getComponent(i))) {
        if (isPopupMenuSeparator(popupMenu.getComponent(i - 1))) {
            popupMenu.remove(i);
            i--;
voidremoveExtraSeparators(JPopupMenu popup)
Removes extra separators, if any. 
Component[] components = popup.getComponents();
if (components.length <= 1) {
    return;
for (int i = 0; i < components.length; i++) {
    Component component = components[i];
    if (component instanceof JSeparator) {
        if (i == 0 || i == components.length - 1) { 
...
voidremoveTopAndBottomSeparators(JPopupMenu popupMenu)
Convenience method that calls the methods removeTopSeparators(JPopupMenu) and removeBottomSeparators(JPopupMenu) with the given pop up menu as parameter. 
if (popupMenu.getComponentCount() == 0) {
    return;
removeTopSeparators(popupMenu);
removeBottomSeparators(popupMenu);
voidsetLocationOnScreen(JPopupMenu visibleMenu, int x, int y)
This method exists because popup menus can not be directly moved (the have to be hidden and re-shown). 
Point invokerLocation = visibleMenu.getInvoker().getLocationOnScreen();
visibleMenu.setVisible(false);
visibleMenu.show(visibleMenu.getInvoker(), x - invokerLocation.x, y - invokerLocation.y);
voidsetPopupMenu(final JComponent component, final JPopupMenu popup)
Gives a component a popup menu 
component.addMouseListener(new MouseAdapter() {
    @Override
    public void mousePressed(final MouseEvent e) {
        if (e.getButton() > MouseEvent.BUTTON3)
            return;
        if (e.isPopupTrigger()) {
            popup.show(component, e.getX(), e.getY());
    @Override
    public void mouseReleased(final MouseEvent e) {
        if (e.getButton() > MouseEvent.BUTTON3)
            return;
        if (e.isPopupTrigger()) {
            popup.show(component, e.getX(), e.getY());
});
voidsetPopupMenu(final JComponent component, final JPopupMenu popup)
Gives a component a popup menu 
component.addMouseListener(new MouseAdapter() {
    @Override
    public void mousePressed(final MouseEvent e) {
        if (e.isPopupTrigger()) {
            popup.show(component, e.getX(), e.getY());
    @Override
...
voidshowButtonPopupMenu(AbstractButton button, JPopupMenu popup)
show Button Popup Menu 
if (!popup.isVisible()) {
    Dimension size = button.getSize();
    popup.show(button, 0, size.height);
voidshowMenu(JPopupMenu menu, JButton button)
Shows specified menu positioned relatively to specified button. 
Dimension dim = menu.getPreferredSize();
menu.show(button, button.getWidth() - dim.width, button.getHeight());
voidshowModal(javax.swing.JPopupMenu popupMenu, java.awt.Component invoker, java.awt.Point pt)
show Modal 
java.awt.Component root = javax.swing.SwingUtilities.getRoot(invoker);
final javax.swing.JLayeredPane layeredPane;
if (root instanceof javax.swing.JFrame) {
    javax.swing.JFrame window = (javax.swing.JFrame) root;
    layeredPane = window.getLayeredPane();
} else if (root instanceof javax.swing.JDialog) {
    javax.swing.JDialog window = (javax.swing.JDialog) root;
    layeredPane = window.getLayeredPane();
...