Method getToolTipText

unused/javax/swing/JTree.java:1542–1582

Overrides JComponent 's getToolTipText method in order to allow renderer's tips to be used if it has text set. NOTE: For JTree to properly display tooltips of its renderers, JTree must be a registered component with the ToolTipManager</cod

(MouseEvent event)

     *          if <code>event</code> is null
     */
    public String getToolTipText(MouseEvent event) {
        String tip = null;

        if(event != null) {
            Point p = event.getPoint();
            int selRow = getRowForLocation(p.x, p.y);
            TreeCellRenderer       r = getCellRenderer();

            if(selRow != -1 && r != null) {
                TreePath     path = getPathForRow(selRow);
                Object       lastPath = path.getLastPathComponent();
                Component    rComponent = r.getTreeCellRendererComponent
                    (this, lastPath, isRowSelected(selRow),
                     isExpanded(selRow), getModel().isLeaf(lastPath), selRow,
                     true);

                if(rComponent instanceof JComponent) {
                    MouseEvent      newEvent;
                    Rectangle       pathBounds = getPathBounds(path);

                    p.translate(-pathBounds.x, -pathBounds.y);
                    newEvent = new MouseEvent(rComponent, event.getID(),
                                          event.getWhen(),
                                              event.getModifiers(),
                                              p.x, p.y,
                                              event.getXOnScreen(),
                                              event.getYOnScreen(),
                                              event.getClickCount(),
                                              event.isPopupTrigger(),
                                              MouseEvent.NOBUTTON);

                    tip = ((JComponent)rComponent).getToolTipText(newEvent);
                }
            }
        }
        // No tip from the renderer get our own tip
        if (tip == null) {
            tip = getToolTipText();
        }
        return tip;
    }

    /**
     * Called by the renderers to convert the specified value to