Alloyui diagram builder addon - Canvas Size Issue

When I create a new org.vaadin.diagrambuilder.DiagramBuilder from the plugin https://vaadin.com/directory#!addon/diagram-builder. The cavas does not size or allow scrolling so half the diagram is missing (As seen in screen shot).
The only explicit sizing I am doing in vaadin is the following.
 
              Panel panel = new Panel("Scroll");
              this.setContent(panel);
              panel.setContent(getDig());
 
       public DiagramBuilder getDig() {
              // Initialize our new UI component
              DiagramBuilder diagramBuilder = new DiagramBuilder();
…
  diagramBuilder.setSizeFull();
       return diagramBuilder;
}

Any help would be great, thanks Sam