Tree uses BaseComponent that doesn't seem to be in tapestry5?
On Fri, Mar 18, 2016 at 2:15 PM, Chris Poulsen <mailingl...@nesluop.dk>
wrote:
> Hi,
>
> Take a look at the Tapestry Tree component to see how recursive rendering
> can be done.
>
> --
> Chris
>
> On Fri, Mar 18, 2016 at 6:17 AM, Qbyte Consulting <
> qbyteconsult...@gmail.com
> > wrote:
>
> > I am creating a Menu component (for a ul tag) that needs to
> > programmatically generate the child links.
> >
> > I already have a MenuItem component, but this is parameter bound to a
> > template, whereas now I need to programmatically drive the parameters.
> >
> > I either need to be able to create the existing MenuItem objects somehow
> in
> > the Menu component and render them, or I simply write the links out in
> the
> > menu - however since my Menu component isn't extending AbstractLink (like
> > MenuItem) I can't use writeLink().
> >
> > Any ideas what is the simplest approach to resolve this? Code below.
> >
> > John
> >
> >
> > public class Menu {
> >
> > /** The text. */
> > @Parameter(required = true, allowNull = false, defaultPrefix =
> > BindingConstants.LITERAL)
> > private String name;
> >
> > /** The resources. */
> > @Inject
> > private ComponentResources resources;
> >
> > /** The component source. */
> > @Inject
> > private ComponentSource componentSource;
> >
> > @Inject
> > private PageRenderLinkSource linkSource;
> >
> > /** The messages. */
> > @Inject
> > private Messages messages;
> >
> > @Inject
> > private MenuService menuService;
> >
> > /** The state bean. */
> > @SessionState(create = false)
> > private SessionStateBean stateBean;
> >
> > /**
> > * If provided, this is the activation context for the target page
> (the
> > * information will be encoded into the URL). If not provided, then
> the
> > * target page will provide its own activation context.
> > */
> > @Parameter
> > private Object[] context;
> >
> > /**
> > * Begin render.
> > *
> > * @param writer the writer
> > */
> > void beginRender(MarkupWriter writer) {
> > writer.element("ul");
> > for (String pageName :
> > menuService.getPageNames(MenuService.Menu.valueOf(name))) {
> > renderMenuItem(pageName, writer);
> > }
> > }
> >
> > private void renderMenuItem(String page, MarkupWriter writer) {
> > Link link = resources.createPageLink(page,
> > resources.isBound("context"), context);
> > writer.element("li");
> > NO!! writeLink(writer, link);
> > writer.writeRaw(messages.get(page.toLowerCase().concat(".link")));
> > writer.end();
> > writer.end();
> > }
> >
> > /**
> > * After render.
> > *
> > * @param writer the writer
> > */
> > void afterRender(MarkupWriter writer) {
> > writer.end();
> > }
> > }
> >
> >
> > public class MenuItem extends AbstractLink {
> >
> > /**
> > * The logical name of the page to link to.
> > */
> > @Parameter(required = true, allowNull = false, defaultPrefix =
> > BindingConstants.LITERAL)
> > private String page;
> >
> > /** The text. */
> > @Parameter(required = true, allowNull = false, defaultPrefix =
> > BindingConstants.LITERAL)
> > private String text;
> >
> > /** The resources. */
> > @Inject
> > private ComponentResources resources;
> >
> > /** The component source. */
> > @Inject
> > private ComponentSource componentSource;
> >
> > /** The state bean. */
> > @SessionState(create = false)
> > private SessionStateBean stateBean;
> >
> > /**
> > * If provided, this is the activation context for the target page
> (the
> > * information will be encoded into the URL). If not provided, then
> the
> > * target page will provide its own activation context.
> > */
> > @Parameter
> > private Object[] context;
> >
> > /**
> > * Begin render.
> > *
> > * @param writer the writer
> > */
> > void beginRender(MarkupWriter writer) {
> > if (isDisabled())
> > return;
> > Link link = resources.createPageLink(page,
> > resources.isBound("context"), context);
> > writer.element("li");
> > writeLink(writer, link);
> > writer.writeRaw(text);
> > }
> >
> > /**
> > * After render.
> > *
> > * @param writer the writer
> > */
> > void afterRender(MarkupWriter writer) {
> > if (isDisabled())
> > return;
> > writer.end();
> > writer.end();
> > }
> > }
> >
>
