Customize tooltip text for SDM node

Question

How to customize tooltip text to display information about all overlapped nodes?

Answer

In order to customize tooltip text to display information about all the overlapped nodes, you need to:

1. Subclass the

and override the following method and constructors:

-  getTooltipText to return dynamically generated text

- default constructor

- constructor that accepts an IlvInputStream

- constructor that accepts another object of the same type

- copy method that returns a copy of the same object type

public class MySDMCompositeNode extends IlvSDMCompositeNode { 
   public MySDMCompositeNode() 
   { 
      super(); 
   } 
   public MySDMCompositeNode(IlvLayoutManager layout) 
   { 
      super(layout); 
   } 

   public MySDMCompositeNode(MySDMCompositeNode source) 
   { 
      super(source); 
   } 

   public MySDMCompositeNode(IlvInputStream stream) 
      throws IlvReadFileException 
   { 
      super(stream); 
   } 

   public IlvGraphic copy() 
   { 
      return new MySDMCompositeNode(this); 
   } 

   public String getToolTipText(IlvPoint p, IlvTransformer t) 
   { 
      String text = computeComplexTooltip(p, t); 
      if (!text.isEmpty()) 
         return text; 
      // otherwise, use the base functionality 
      return super.getToolTipText(p, t); 
   } 

   private String computeComplexTooltip(IlvPoint p, IlvTransformer t) { 

      ArrayList<String> lines = new ArrayList<String>(); 
      IlvManager mgr = null; 
      IlvGraphicBag gb = getGraphicBag(); 
      while( gb!= null) 
      { 
         if( gb instanceof IlvManager ) 
         { 
            mgr = (IlvManager) gb; 
            Enumeration e = mgr.getViews(); 
            while (e.hasMoreElements()) { 
               IlvManagerView view = (IlvManagerView)e.nextElement(); 
               if (view != null) 
               { 
                  IlvGraphicVector vector = 
                     mgr.getAllObjects(p, view, true, false); 
                  for( int i = 0; i < vector.size(); i++ ) 
                  { 
                     IlvGraphic g = vector.elementAt(i); 
                     // Expecting HalfZoomingGraphic when HalfZooming 
                     // renderer is being used in the CSS file 
                     if( mgr.isVisible(g) && 
                         g instanceof 
                         IlvHalfZoomingRenderer.HalfZoomingGraphic ) 
                     { 
                        lines.add( 
                           ((IlvHalfZoomingRenderer.HalfZoomingGraphic)g). 
                           getObject().getToolTipText()); 
                     } 
                  } 
               } 
            } 
            break; 
         } 
         gb = gb.getGraphicBag(); 
      } 

      String[] linesArray = lines.toArray(new String[lines.size()]); 
      return 
         ilog.views.util.swing.IlvSwingUtil.createMultiLineToolTipText( 
            linesArray, SwingConstants.LEFT); 
   } 
}

Note: When HalfZooming renderer is being used, the manager will return IlvHalfZoomingRenderer.HalfZoomingGraphic objects. If HalfZooming renderer is not used, then you should be getting the MySDMCompositeNode as the graphic objects in the IlvGraphicVector returned by the IlvManager.getAllObjects method.

2. Set the above custom composite node to the node rule via CSS:

node { 
   class : "MySDMCompositeNode" ; 
   ... // define other properties for the node as usual   

}