Method fireTreeWillCollapse

unused/javax/swing/JTree.java:2853–2868

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the path parameter. @param path the TreePath indicating the node that was expanded @see EventListenerList

(TreePath path)

     * @see EventListenerList
     */
     public void fireTreeWillCollapse(TreePath path) throws ExpandVetoException {
        // Guaranteed to return a non-null array
        Object[] listeners = listenerList.getListenerList();
        TreeExpansionEvent e = null;
        // Process the listeners last to first, notifying
        // those that are interested in this event
        for (int i = listeners.length-2; i>=0; i-=2) {
            if (listeners[i]==TreeWillExpandListener.class) {
                // Lazily create the event:
                if (e == null)
                    e = new TreeExpansionEvent(this, path);
                ((TreeWillExpandListener)listeners[i+1]).
                    treeWillCollapse(e);
            }
        }
    }

    /**
     * Adds a listener for <code>TreeSelection</code> events.