When an organigram (org.zkoss.zkmax.zul.Organigram) is assigned with a model, a default renderer is assigned too¹. The default renderer will assume that each Orgitem has one Orgnode, and it converts the data into a string directly². If you want to change render style or retrieve a particular field of the data, you have to implement org.zkoss.zkmax.zul.OrgitemRenderer to handle the rendering.

For example,

    public class MyRenderer implements OrgitemRenderer {
        public void render(Orgitem orgitem, Object data, int index) throws Exception {
            final Button button = new Button(Objects.toString(data));
            button.addEventListener(Events.ON_CLICK, new EventListener<Event>() {
                public void onEvent(Event event) {
                    Clients.showNotification(button.getLabel());
                }
            });

            Orgnode orgnode = new Orgnode();
            button.setParent(orgnode);
            orgnode.setParent(orgitem);
        }
    }

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1. For the concept about component, model and renderer, please refer to the Model-driven Display section. ↩

2. If the Organigram is assigned a template called model, then the template will be used to render the Organigram. For more information, please refer to the Organigram Template section. ↩