Tapestry - Composite components?

Question

can somebody tell me how to create composite components in Tapestry? I know how to do this in JSF with using as well as ui:define. But how with tapestry?

I'd like to create following setup:

sidebar.tml : should define some replaceable variables, here 'header' and 'content'

<t:container>
The header is ${header}, and the content ist ${content}.
</t:container>

layout.tml : should define the right place for the sidebar to always align to

//header
<t:sidebar /> 
//footer

customPage.tml : should deliver the content for the sidebar

<t:sidebar>
    <t:header>my header</t:header>
    <t:content>some content here</t:content>
</t:sidebar>

I know is cannot be done this way, but I hope you understand what I'm trying to do and could help me?

tyvm

Answer 1

This is how I'd do it:

sidebar.tml

<t:container>
The header is <t:delegate to="header"/>, and the content ist <t:delegate to="content"/>
</t:container>

Sidebar.java

public class Sidebar
{
    @Property
    @Parameter(required = true)
    private Block header;

    @Property
    @Parameter(required = true)
    private Block content;

layout.tml

//header
<t:sidebar header="sidebarHeader" content="sidebarContent"/> 
//footer

Layout.java

public class Layout
{
    @Property
    @Parameter(required = true)
    private Block sidebarHeader;

    @Property
    @Parameter(required = true)
    private Block sidebarContent;

customPage.tml

<t:layout>
    <p:sidebarHeader>my header</p:sidebarHeader>
    <p:sidebarContent>some content here</p:sidebarContent>
    rest of your content here
</t:layout>

Hope it helps!