/* * Fires AccessibleActiveDescendant PropertyChangeEvent to notify listeners * on the popup menu invoker that a popup list item has been selected */ private void fireActiveDescendant() { if (JPopupMenu.this instanceof BasicComboPopup) { // get the popup list JList popupList = ((BasicComboPopup) JPopupMenu.this).getList(); if (popupList == null) { return; } // get the first selected item AccessibleContext ac = popupList.getAccessibleContext(); AccessibleSelection selection = ac.getAccessibleSelection(); if (selection == null) { return; } Accessible a = selection.getAccessibleSelection(0); if (a == null) { return; } AccessibleContext selectedItem = a.getAccessibleContext(); // fire the event with the popup invoker as the source. if (selectedItem != null && invoker != null) { AccessibleContext invokerContext = invoker.getAccessibleContext(); if (invokerContext != null) { // Check invokerContext because Component.getAccessibleContext // returns null. Classes that extend Component are responsible // for returning a non-null AccessibleContext. invokerContext.firePropertyChange( ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, null, selectedItem); } } } }