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From: Martin Grigorov <mgrigorov@apache.org>
Date: Tue, 10 Mar 2015 10:01:13 +0200
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Subject: Re: Will renderHead method be invoked when a component is rendered
 via wicket events?
To: "users@wicket.apache.org" <users@wicket.apache.org>
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On Tue, Mar 10, 2015 at 3:11 AM, MadasamySankarapandian <
madasamy@mcruncher.com> wrote:

> On Mon, Mar 9, 2015 at 3:03 PM, Martin Grigorov <mgrigorov@apache.org>
> wrote:
>
> > Hi,
> >
> > If a component is rendered then its #renderHead() should be called!
> >
> > On Mon, Mar 9, 2015 at 4:08 AM, MadasamySankarapandian <
> > madasamy@mcruncher.com> wrote:
> >
> > >          I am using bootstrap-timepicker.js in a single page
> application
> > .
> > > Time picker is added in a panel which is then embedded in the page.
> When
> > > the entire page is reloaded, the timepicker is working fine. However,
> > when
> > > the respective panel is displayed via Wicket events, the time picker is
> > not
> > > rendered. I am using Component#onEvent(Ievent) method to display the
> > panel.
> > > The javascript resource reference for timepicker is added in renderHead
> > > method. I would like to know if a panel is reloaded during onEvent
> call,
> > > will rendeHead method be invoked or not?
> > >
> > >
> > > Here are few code snippets to help you all understand what I am trying?
> > >
> > > public class BasePage
> > > {
> > >
> > > public void renderHead(IHeaderResponse response)
> > >
> >
> > >>Call super.renderHead(response) too.
> >
> > >>Is this a method in the page or in SelectionPanel ?!
> >
> >           This method is in BasePage.
>
> >
> > > {
> > >   response.render(JavaScriHeaderItem.forReference(new
> > > JavaScriptResourceReference(bootstrap-timepicker.js)));
> > >   response.render(JavaScriHeaderItem.forReference(new
> > > JavaScriptResourceReference(common.js)));
> > > }
> > >
> > > //event is received to display panel
> > >  public void onEvent(IEvent ievent)
> > >  {
> > >     super.onEvent(ievent)
> > >     if(event.getPayLoad() instance of Notification)
> > >     {
> > >         Notification notification = (Notification) event.getPayload();
> > >       PageParameters parameters = notification.getPageParameters()
> > >       Panel selectedPanel = getSelectedPanel(parameters,
> > > notification.getPanelClass);
> > >       BasePage.this.selectedPanel.replaceWith(selectedPanel);
> > >
> >
> > >>There is no Ajax here, so the whole page is re-rendered and
> #renderHead()
> > >>should be called for all visible components.
> >
>            Sorry here ajax is involved. In the sample code i forgot to
> add.
>            selectedPanel.setOutputMarkupId(true);
>            notification.getTarget().add(selectedPanel);
>

In that case only selectedPanel's #renderHead() will be called.
BasePage#renderHead() won't be called because the page is not re-rendered
with the Ajax response.

Martin Grigorov
Funemployed! Available for hire!
Wicket Training and Consulting
https://twitter.com/mtgrigorov


>
> >
> > >       }
> > >   }
> > > }
> > >
> > >
> > > --
> > > Thanks and regards
> > >  Madasamy
> > >
> >
>
>
>
> --
> Thanks and regards
>  Madasamy
>

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