I've added it to Jira now, Bug Id is WICKET-316. The same thing also occurs
when I run the AjaxMouseEventPage example from the wicket-examples project.
Eelco Hillenius wrote:
>
> Sounds like a bug. If the other thread wasn't helping, could you
> please open up a JIRA issue?
>
> Eelco
>
>
> On 2/21/07, Gohan <[EMAIL PROTECTED]> wrote:
>>
>> I've posted this as a reply to another thread but I think it deserves a
>> thread of its own.
>> What happens is that I'd like to show and hide a label by setting switch
>> between setVisible(true) and setVisible(false) when clicking on a
>> AjaxFallbackLink. I've wrapped the label inside a WebMarkupContainer to
>> make
>> this doable. Here is the code:
>>
>> public BasePage() {
>> final WebMarkupContainer table = new WebMarkupContainer(this,
>> "tableId");
>> table.setOutputMarkupId(true);
>> final Label label = new Label(table, "labelId", "This is a
>> label");
>> label.setOutputMarkupId(true);
>> label.setVisible(false);
>>
>>
>> new AjaxFallbackLink(this, "linkId") {
>> private static final long serialVersionUID =
>> 5523627214368899839L;
>> @Override
>> public void onClick(AjaxRequestTarget target) {
>> final boolean visible = label.isVisible();
>> label.setVisible(!visible);
>> target.addComponent(table);
>> }
>> };
>> }
>>
>> When I click on the AjaxFallbackLink the first time everything is fine,
>> the
>> label (with wicket id "labelId") gets visible. But when I click the link
>> again to make it invisible, I get a NullPointerException when executing
>> label.setVisible(..). Debugging down into the wicket source code tells me
>> that the NullPointerException occurs on 327 in class Page, when it tries
>> to
>> execute "versionManager.componentStateChanging(change)". However
>> versionManager is null. Why is this? Is this a bug or am I doing
>> something
>> wrong?
>>
>> Thanks
>>
>> --
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>>
>>
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>
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--
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Sent from the Wicket - User mailing list archive at Nabble.com.
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