Thank you, this worked:
FacesContext context = FacesContext.getCurrentInstance();
UIViewRoot view = context.getViewRoot();
HtmlPanelGroup box = (HtmlPanelGroup)
view.findComponent("transactionDetailsBox");
box.setRendered(true);
What I am curious is why wouldn't a binded backing bean property work?
For example, I did try:
<h:panelGroup text="#{tbrowser.transactionDetailsBox}"
rendered="false"
id="transactionDetailsBox">
When I call the following statement in my action listener:
this.getTransactionDetailsBox().setRendered(true);
I receive a NullPointerException on the same statement.
Why doesn't a binding value expression work for this?
Thanks,
--Todd
-----Original Message-----
From: Roger.Kitain_at_Sun.COM [mailto:Roger.Kitain_at_Sun.COM]
Sent: Wednesday, April 11, 2007 9:23 AM
To: users_at_javaserverfaces.dev.java.net
Subject: Re: A concept question. How do I initially hide (do not render)
a component initially on a page?
In your page for the component you don't want rendered, add
rendered="false"
So when the pag is first rendered, the component should not appear.
Then in your action method find that component in the view and set the
rendered attribute to true.
-roger
Todd Patrick wrote:
> I have the following:
> private boolean panelDisplayed = false; public boolean
> isPanelDisplayed() { return this.panelDisplayed; }
>
> public void setPanelDisplayed(boolean panelDisplayed) {
> this.panelDisplayed = panelDisplayed; } public void
> doFreeFormSearch(ActionEvent event) { this.setPanelDisplayed(true);
> ...
> }
> The issue is my h:panelGroup is still initially displayed. I put:
> this.setPanelDisplayed(false);
> in my constructor and the component is still displayed, so what do I
> need to do to have the h:panelGroup initially hidden?
> Thanks,
> --Todd
>
> ----------------------------------------------------------------------
> --
> *From:* Adam Brod [mailto:ABrod_at_intralinks.com]
> *Sent:* Friday, April 06, 2007 7:47 AM
> *To:* users_at_javaserverfaces.dev.java.net
> *Subject:* Re: A concept question. How do I initially hide (do not
> render) a component initially on a page?
>
>
> What I would do is something like:
>
> <h:panelGroup rendered="#{myBean.panelDisplayed}">
> // some markup with jsf components
> </h:panelGroup>
>
> <h:commandLink value="Render The Panel" action="#{myBean.showPanel}"/>
>
> In your backing bean (myBean), you'd have two methods:
>
> public boolean isPanelDisplayed() {
> return this.isPanelDisplayed;
> }
>
> public String showPanel() {
> // some business logic maybe
>
> this.isPanelDisplayed = true;
> return null; // this will render the same page again }
>
> I hope this helps.
> *
> Adam Brod*/
> Product Development Team/
>
>
>
> From: "Todd Patrick" <Todd.Patrick_at_dtn.com>
> To: <users_at_javaserverfaces.dev.java.net>
> Date: 04/05/2007 04:20 PM
> Subject: A concept question. How do I initially hide (do not
render)
> a component initially on a page?
>
>
> ----------------------------------------------------------------------
> --
>
>
> I am trying to figure out the following, which I can code - but I am
> unsure about the proper approach.
>
> I have a UIPanel with children on a single JSF page.
>
> What I want is to not render - UIPanel.setRendered(false) - the first
> time the page loads. I only want to render the UIPanel within a
> condition inside an Action, i.e. a user clicks on a HtmlCommandButton.
>
> So my question is what is the best way to approach this? What is the
> right concept?
>
> Do I have the UIPanel with children in the JSF page and set the
> UIPanel.setRendered(false) in the backing bean constructor?
>
> Do I have an empty UIPanel binded to a backing bean property and in
> Java code add the children?
>
> What is the **best** or **correct** way to approach this concept?
>
> Thanks,
>
> --Todd
>
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