View Manager + Horizontal Split Panel

Vaadin 6 / 7 / 8
1

Hi,

I am trying to have a typical reporting application with a horizontal split panel.

The left side will have all the buttons (typically like the Vaadin 7 dashboard demo).

Based on the clicks, the right side view should be rendered.

What I am not able to wrap my head around is, how do I keep the left side static and just replace the second component as a view in vaadin 7.

I am sure, I am missing something very trivial. Any help is greatly appreciated.

If I just traverse to the root of my application:

http://localhost:8080/MyUI

I get the typical empty view error:


javax.servlet.ServletException: java.lang.IllegalArgumentException: Trying to navigate to an unknown state '' and an error view provider not present
	com.vaadin.server.VaadinServlet.handleServiceException(VaadinServlet.java:580)
	com.vaadin.server.VaadinServlet.service(VaadinServlet.java:343)
	com.vaadin.server.VaadinServlet.service(VaadinServlet.java:201)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

if I add, the code shown in buildMainView, it straight away takes me to the view page (obviously) without the static content.


public class MYUI extends UI {

	Navigator navigator;
	
	// All the View Names
    protected static final String CONFIG_COMPARISON= "configComparison";
    
    // End  View Names
    
    HorizontalLayout root = new HorizontalLayout();
    
    HashMap<String, Class<? extends View>> navigatorHolder = new HashMap<String, Class<? extends View>>() {
        {
            put(CONFIG_COMPARISON, ConfigurationPage.class);
           
        }
    };
    
    @Override
	public void init(VaadinRequest request) {
    	
		navigator = new Navigator(this, this);
		for (String view : navigatorHolder.keySet()) {
			navigator.addView(view, navigatorHolder.get(view));
		}
		HorizontalSplitPanel hz = new HorizontalSplitPanel();
		MainViewPage mv = new MainViewPage();
		hz.setFirstComponent(mv);
		setContent(hz);
		buildCommonView();

		setSizeFull();

	}

	private void buildCommonView() {
		
	 String f = Page.getCurrent().getUriFragment();
	        if (f != null && f.startsWith("!")) {
	            f = f.substring(1);
	        }
	        if (f == null || f.equals("") || f.equals("/")) {
	            navigator.navigateTo(CONFIG_COMPARISON);
	        }
		
	}

Any Help/Advice/Pointers greatly appreciated.

Thanks,
Ach