void (AWTEvent event) { if (event.getID() != WindowEvent.WINDOW_OPENED) { return; } JBPopupFactory jbPopupFactory = getPopupFactory(); if (jbPopupFactory == null) { return; } WindowEvent we = (WindowEvent)event; for (JBPopup each : jbPopupFactory.getChildPopups(this)) { if (!each.isDisposed() && SwingUtilities.isDescendingFrom(each.getContent(), we.getWindow())) { super.setPopupVisible(false); } } }