Panel setVisible() in Ajax call

[Stephan Koch]

Hi all,

I have a Page with a DropDown Component and a Panel. The Panel displays 
some stuff based on the model object of the DropDown.
In the constructor of my page, I set panel.setVisible(false) to prevent 
the panel from being rendered while the model object of the DropDown is 
null because the user has not yet selected an option.


Now I want the Panel to be rendered once a valid choice is selected by 
the user. I tried this:


protected void onEvent(AjaxRequestTarget target) {
   log.debug(ddMonth onChange triggered.);
   if(month != null) {
   reportPanel.setVisible(true);
   reportPanel.updatePanel(getServiceManager(), 
getUser(), month);
   target.addComponent(reportPanel); 
   }

}


The event is triggered, the panel is not rendered though. Is there a way 
to achieve this without reloading the entire page?

If not, how would I trigger a page reload from the onEvent method?

Thanks,
Stephan

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Re: Panel setVisible() in Ajax call

[Gerolf Seitz]

if you set the panel to be invisible on first render,
you also have to call panel.setOutputMarkupPlaceholderTag(true) so that
a hidden placeholder is rendered, which gets replaced with the real panel
once you set it to visible and add it to the ajaxrequestarget.

  Gerolf

On Fri, Mar 21, 2008 at 10:54 AM, Stephan Koch [EMAIL PROTECTED]
wrote:

 Hi all,

 I have a Page with a DropDown Component and a Panel. The Panel displays
 some stuff based on the model object of the DropDown.
 In the constructor of my page, I set panel.setVisible(false) to prevent
 the panel from being rendered while the model object of the DropDown is
 null because the user has not yet selected an option.

 Now I want the Panel to be rendered once a valid choice is selected by
 the user. I tried this:

 protected void onEvent(AjaxRequestTarget target) {
log.debug(ddMonth onChange triggered.);
if(month != null) {
reportPanel.setVisible(true);
reportPanel.updatePanel(getServiceManager(),
 getUser(), month);
target.addComponent(reportPanel);
}
 }


 The event is triggered, the panel is not rendered though. Is there a way
 to achieve this without reloading the entire page?
 If not, how would I trigger a page reload from the onEvent method?

 Thanks,
 Stephan

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 To unsubscribe, e-mail: [EMAIL PROTECTED]
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Re: Panel setVisible() in Ajax call

[Timo Rantalaiho]

On Fri, 21 Mar 2008, Gerolf Seitz wrote:
 if you set the panel to be invisible on first render,
 you also have to call panel.setOutputMarkupPlaceholderTag(true) so that
 a hidden placeholder is rendered, which gets replaced with the real panel
 once you set it to visible and add it to the ajaxrequestarget.

...and when this is the case, you should see an error about
it on the Ajax debug console (Wicket javascript complaining
about how it cannot find the specified element in HTML.

Best wishes,
Timo

-- 
Timo Rantalaiho   
Reaktor Innovations OyURL: http://www.ri.fi/ 

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