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Documentation > WebObjects 4.5 >
Dynamic Elements
Element Description
WOComponentContent allows you to write nested components as
HTML container elements: elements that can include text and other
elements between their opening and closing tags. Using WOComponentContent
you can, for example, write a component that defines the header
and footer for all of your application's pages.
The WOComponentContent dynamic element doesn't have any
attributes. It's simply a marker that specifies where the contents
wrapped by the component's <WEBOBJECT> tag
should go.
| You can only have one WOComponentContent element
in a given component. |
Synopsis
WOComponentContent { };
Example
To write a component that defines the header and footer for
some or all of your application's pages, first define a component
with HTML similar to the following:
<HTML>
<HEAD>
<TITLE>Cool WebObjects App</TITLE>
</HEAD>
<BODY>
<!-- A banner common to all pages here -->
<!-- Start of content defined by the parent element -->
<WEBOBJECT name=ParentContent></WEBOBJECT>
<!-- End of content defined by the parent element -->
<!-- Put a footer common to all pages here. -->
</BODY>
</HTML>
The <WEBOBJECT> element above is a WOComponentContent
element declared like this:
ParentContent : WOComponentContent {};
To use this component, wrap the contents of all of your other
components with a <WEBOBJECT> tag
that specifies the component defined above. For example, suppose
you named the above component HeaderFooterPage.wo.
You could use it in another component like this:
<!-- HTML for a simple component wrapped with HeaderFooterPage -->
<WEBOBJECT name = templateWrapperElement>
<P>Hello, world!</P>
</WEBOBJECT>
Where templateWrapperElement is
declared in the .wod file
like this:
templateWrapperElement : HeaderFooterPage {};
At runtime, the contents wrapped by templateWrapperElement are
substituted for the WOComponentContent definition. As a result,
the HTML generated for this component would be:
<HTML>
<HEAD>
<TITLE>Cool WebObjects App</TITLE>
</HEAD>
<BODY>
<!-- A banner common to all pages here -->
<!-- Start of content defined by the parent element -->
<P>Hello, world!</P>
<!-- End of content defined by the parent element -->
<!-- Put a footer common to all pages here. -->
</BODY>
</HTML>