Thanks Igor for the straight answer - much appreciated. Thanks,
JF On Wed, May 27, 2009 at 9:59 PM, Igor Vaynberg <igor.vaynb...@gmail.com>wrote: > no it is not possible and does not make sense to do so. > > imagine you have a panel that renders <div id="1"><div id="2"></div></div> > > not only would you have to rewrite the id of the top tag, but also of > the inner tags. this becomes even more complicated if components > output header contributors, eg javascript, that depends on those ids. > > if you are instantiating components with the same state then you > should simply connect them all to the same state via models so the > state is reused and does not present overhead. > > makes sense? > > -igor > > On Wed, May 27, 2009 at 5:03 PM, J.-F. Rompre <jrom...@gmail.com> wrote: > > OK, thanks Martjin and Jeremy - I think mentioning performance was a > mistake > > on my part..let me try again. > > > > I am not trying to couple different components, only to reuse what I know > is > > never going to change within the same rendering - actually, avoiding the > use > > of multiple component instances of the same subtype where a single > instance > > would suffice. > > > > My question is: Is it possible to capture a rendered string for reuse? In > > other words, if I have a component subtype that I am currently > instantiating > > multiple times with exactly the same state (therefore the output is > exactly > > the same), is it possible to render it once and once only and reuse the > > string from that rendering within the same container or page? > > > > At this stage I am only trying to know how to do something instead of why > > (optimization or other reason, such as saving markup coding, or some > other > > reason). I went through the source and searched on forums as well to find > > out, but didn't. > > > > My apologies if that question has been answered elsewhere - please let me > > know where I can look. > > > > Thanks, > > > > JF > > > > On Wed, May 27, 2009 at 6:33 PM, Jeremy Thomerson < > jer...@wickettraining.com > >> wrote: > > > >> The real question that has been asked time and time again on this list > >> when such a question is received is this: > >> > >> WHY? It's premature (and almost certainly unnecessary) optimization. > >> Doing it needlessly couples multiple components together - reducing > >> reuse. > >> > >> As always, we are more than interested in seeing any results of > >> performance analysis that you have done that says that this will > >> reduce your page load time by any significant factor. > >> > >> -- > >> Jeremy Thomerson > >> http://www.wickettraining.com > >> > >> > >> > >> > >> On Wed, May 27, 2009 at 2:53 PM, J.-F. Rompre <jrom...@gmail.com> > wrote: > >> > I am trying to do something that should be easy to do, and may > already > >> be > >> > available from the API (I am still usin 1.3.5). > >> > > >> > How can one duplicate rendered strings? > >> > > >> > In other words, I am trying to render once but copy a number of times > >> for > >> > better performance - e.g., putting a page navigator both at the top > and > >> > bottom of the list (the bottom is simply a label generated from > copying > >> the > >> > rendered top one) or something more complex such as a calendar. > >> > > >> > I tried using IBehavior.onRendered to copy getResponse.toString() for > >> later > >> > reuse, but myComponent.renderComponent() throws > IllegalStateException: > >> Page > >> > not found - even though I am adding the component to a panel as > >> instructed > >> > by Component.renderComponent() - any ideas? My code is below. > >> > > >> > I also thought of overriding one of the rendering methods to write > >> directly > >> > to the response, but Component.renderXXX() methods are all final - > there > >> > has to be a way to do this simply. > >> > > >> > Any ideas? > >> > > >> > Thanks! > >> > JF > >> > > >> > The containing panel java (groovy) code - 'ppn' is the component we > want > >> to > >> > render only once > >> > .....//ProductPanel > >> > //... > >> > productsContainer.add( products ) > >> > ProductsPagingNavigator ppn = new ProductsPagingNavigator( > >> > "productsPagerTop", products) > >> > ppn.add( new MakeRenderedStringBehavior()) > >> > > >> > productsContainer.add( ppn) > >> > ppn.renderComponent() //THOWS 'Page not found..." exc. > >> > //save the rendering for reuse > >> > CharSequence ppnOut = ppn.getRendered() > >> > //reuse it here > >> > productsContainer.add new Label( "productsPagerBottom", ppnOut) > >> > //.... > >> > > >> > //*********************************** > >> > The Behavior code attached to ppn above: > >> > .....// MakeRenderedStringBehavior > >> > //... > >> > public void onRendered(final Component component) > >> > { > >> > //.... > >> > // Copy the rendering if this component can store it.. > >> > CharSequence output = response.toString(); > >> > if ( component instanceof IRenderedString ) > >> > ((IRenderedString )component ).setRendered( output); > >> > webResponse.write(output); > >> > } > >> > //.... > >> > //************************************* > >> > The containing ProductPanel markup: > >> > <wicket:panel > >> > .... > >> > <div class="Products" wicket:id="products" id="" > >> > <div wicket:id="productsPagerTop" class="Navigation"</div <!-- > >> > rendered -- > >> > <ul > >> > <li wicket:id="productsList" id="" > >> > ... > >> > </div</li > >> > </ul > >> > <div wicket:id="productsPagerBottom" class="Navigation"</div <!-- > >> > pasted in-- > >> > </div > >> > </wicket:panel > >> > > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > >> For additional commands, e-mail: users-h...@wicket.apache.org > >> > >> > > > > > > -- > > JF > > "Half the people you know are below average." -- Steven Wright > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > >
