Hi Peter,
to find a component which is a descendant of the binding component you
need to climb the tree up starting at the binding component.
In restore view phase the component tree is restored and the restored
component with binding is set into the valuebinding. This is a new
created object, and so none of your stored references into descendant
components are valid.
in your case i think you can do something like this:
// combo is your old now invalid UISelectOne
// if the element was rendered before this should work, (afaik)
String comboId = combo.getClientId();
combo =
FacesContext.getCurrentIstance().getViewRoot().findComponent(":" + comboId);
Regards,
Volker
2006/10/10, Peter Rabing <[EMAIL PROTECTED]>:
Hi,
Why is the getter called only once ?
How do I change the list of selectItems - is my code posted below ok for this ?
The submit is correctly rendered in the HTML code, I do get a ValueChangeEvent
in which I
then proceed to update the gui components as described below.
I'd quite like to use Ajax, but I think I get the basics to work first, right
now I am happy with a submit.
kind regards,
Peter
> If you use component-binding, you need to keep in mind that the
> "getter" of your component is only called once, whereas the setter is
> called on every request.
>
> If you need to dynamically change the list of selectItems - you need
> to do that in the setter.
>
> regards,
>
> Martin
>
> On 10/10/06, Gerald Müllan <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > can you post your jsp-code here?
> >
> > Have you added the attribute onchange="this.form.submit();" to the
> > select menu in jsp code? You have to do a submit after changing the
> > selection, otherwise you will only stay on
> > the client.
> >
> > For this kind of usecase you can also use the ajax enabled combobox
> > from sandbox, as it is shown on our examples page:
> >
> > http://example.irian.at/example-sandbox-20061010/ajaxChildComboBox.jsf
> >
> > Would be a more fluid flow for the user.
> >
> > cheers,
> >
> > Gerald
> >
> > On 10/10/06, Peter Rabing <[EMAIL PROTECTED]> wrote:
> > > Hi,
> > >
> > > I've created a component with a binding expression in which I created a
component tree.
> > > The Tree contains 2 combo boxes with some items. Upon Selection of one
item in the combo box
> > > (ValueChangeEvent) I change the entries in the 2nd combo box. But
whichever way I do this, the change is
> > > never reflected on the page, it always shows the same 2 comboxes with the
same entries again.
> > >
> > > To modify the box I use e.g.
> > > UISelectOne combo; //tried creating new instances as well as re-using them
> > > //via a hasmap
> > > combo.getChildren().clear();
> > > UISelectItem[] items = new UISelectItem [ 4];
> > > .. add and fill array ..
> > > combo.getChildren().addAll( items);
> > >
> > > How do I tell it to render the complete page again? Is their some kind of
cache for HTML code?
> > >
> > > I also tried adding value binding expressions for the entries, but the
getter is never called ...
> > >
> > > Thanks for your help,
> > >
> > > Peter
> > > --
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