Question

As an exercise I want to have a menu bar which is disabled until the user logs in. When he logs in I want to call something which will trigger an update. The menu bar is in the master.xhtml template file

<h:form >
  <p:menubar id="masterMenuBar">
  <p:menuitem disabled="#{backing.disableMenu}" value="List users" />
  </p:menubar>
</h:form>

As part of the login I have code to refresh the form

public void refreshForm() {
  RequestContext context = RequestContext.getCurrentInstance(); 
  context.update("form1"); 
  context.update("masterMenuBar");
}

I tried my luck with calling a context update to my defined label of masterMenuBar but the RequestContext apparently doesn’t include my calling template form (which sounds reasonable enough).

Is there some other context I can call which will include a context update to my menu bar? Perhaps I am on the wrong path, and there is a better way to achieve the same thing?

I did notice that even resizing the browser wasn’t reason enough to call again to my backing.disableMenu bean. Apparently I need something fairly strong to cause it to reach my bean a second time.

Answer 1

You need to pass the absolute client ID, not the relative client ID. If you rightclick and view source in browser, then you’ll see that the masterMenuBar element has the (autogenerated) ID of its form prefixed.

You need to give the form where the menu is sitting in a fixed ID

<h:form id="menuForm">
    <p:menubar id="masterMenuBar">
        ...

and pass the absolute client ID instead.

context.update("menuForm:masterMenuBar");

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Update: sorry, it shouldn’t start with : in contrary to the update attribute of <p:commandButton>.