please see the other thread
Juergen
On 6/24/07, Matej Knopp <[EMAIL PROTECTED]> wrote:
> But add(HeaderContributor.forCss()) does not modify component tag. It
> affects header contribution. Header contribution and component tag
> modifications are two different things.
>
> page.add(HeaderContributor.forCss()) works as long as we don't have
> that check that throws exception when you add behavior to page.
>
> -Matej
>
> On 6/24/07, Juergen Donnerstag <[EMAIL PROTECTED]> wrote:
> > Jan - in the other thread - quite rightly pointed out that
> > HeaderContribution does work on pages. It only does not work if a
> > component is attached to <html>. What makes <html> different is that
> > it must partially be rendered befor the <head> section. Why exactly "a
> > component starts rendering before the <head> tag" causes the problem I
> > don't know yet.
> >
> > Juergen
> >
> > On 6/24/07, Juergen Donnerstag <[EMAIL PROTECTED]> wrote:
> > > All behaviors are invoked from Component.onComponentTag(). When a web
> > > page renders it does not call onComponentTag() for the page, as the
> > > page as no associated markup tag.
> > >
> > > That means, though you can do add(HeaderContributor.forCss()) (assume
> > > you are adding to a page) nothing will happen. The CSS will not be
> > > added to the <head> section and you will not get any warning etc..
> > > Instead you may use any other component on your page.
> > >
> > > I agree that throwing an exception is not the preferred solution, but
> > > at least it give users a hint that they are doing something that
> > > currently doesn't work. I thought this is better than nothing while we
> > > could discuss a much better solution for the problem.
> > >
> > > Using <html>:
> > > - means we need to create yet another auto-component (automatically
> > > assign a wicket:id; automatically create an associated
> > > WebMarkupContainer - which will need some special behavior to be
> > > invisible/transparent for users - and of course at runtime you need to
> > > execute it. We already had discusions on how to reduce the number of
> > > auto components.
> > > - do we need to change all relevant WebPage methods to refer to that
> > > component? Or only for adding behaviors (e.g.
> > > getHtmlComponent().add(behavior). By sometime referring to that that
> > > html component and sometimes not, are we not creating yet another
> > > inconsistency (or magic).
> > >
> > > I was thinking of using the <body> component which already is
> > > automatically created. BUT it only make sense for HeaderContributors.
> > > <html> make more sense for AMs which realy modify an attribute (e.g.
> > > lang).
> > >
> > > >I know onComponentTag doesn't make sense, but that's IMHO not valid
> > > >reason to forbid header contribution as well.
> > >
> > > I agree but would be a suitable technical solution:
> > > E.g. keep throwing an exception for IBhavior and implement
> > > public void WebPage.add(HeaderContributor contrib)
> > > {
> > > getBodyContainer().add(contrib)
> > > }
> > >
> > > lets discuss the pros and cons of all alternatives in order to find
> > > the best solution for Wicket and all its users.
> > >
> > > Juergen
> > >
> > > On 6/24/07, Matej Knopp <[EMAIL PROTECTED]> wrote:
> > > > Arrgh. Discard my previous reply. This is wrong. Why shouldn't I be
> > > > able to do header contribution on behavior attached to a page? This
> > > > doesn't make sense!
> > > >
> > > > I know onComponentTag doesn't make sense, but that's IMHO not valid
> > > > reason to forbid header contribution as well.
> > > >
> > > > -Matej
> > > >
> > > >
> > > > On 6/24/07, Jonathan Locke <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > my code which does this:
> > > > >
> > > > > add(HeaderContributor.forCss(CSS));
> > > > >
> > > > > now throws the following exception. my web page needs to contribute
> > > > > CSS to
> > > > > the header. i'm wondering, why can't i do it this way anymore (it
> > > > > seems
> > > > > like WebPage is a component like any other and my code did work fine
> > > > > before
> > > > > this exception)? and what's the best alternative? thanks!
> > > > >
> > > > > Caused by: org.apache.wicket.WicketRuntimeException: You can
> > > > > not
> > > > > attach behaviors onto WebPages. Web pages do require a markup file
> > > > > but no
> > > > > specific tag to attach the page to. This is why behaviors such as
> > > > > HeaderContributor for example don't work if attached to a WebPage.
> > > > > Please
> > > > > attach the behavior to any other of your components.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > View this message in context:
> > > > > http://www.nabble.com/cannot-add-CSS-to-web-page--tf3970619.html#a11270671
> > > > > Sent from the Wicket - User mailing list archive at Nabble.com.
> > > > >
> > > > >
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