Spry User Guide - Support - Adobe

In the example code, spry:region is used for the detail region instead of spry:detailregion. The difference
between a spry:region and a spry:detailregion is that the spry:detailregion specifically listens for
CurrentRowChange notifications (in addition to DataChanged notifications) from the data set, and updates itself
when it receives one. Because the current row of the dsIngredients datasetneverchanges(it’sthecurrentrowof
the dsSpecials data set that changes), a spry:detailregion attribute is not needed. In this case, the spry:region
attribute, which defines a region that only listens for DataChanged notifications, suffices.
About progressive enhancement and data set accessibility
Progressive enhancement writes code for a document for the lowest common denominator of browser functionality
and then enhances the presentation and behavior of the page, using CSS, JavaScript, Flash, Java, and SVG code, and
so on. Pages created with this approach provide an enhanced experience in modern browsers, but the data is still
accessible and the page still functional in the absence of these technologies.
All of the Spry examples in this document up to this point have dealt with using JavaScript to dynamically load XML
data and generate regions of the document. You can also use Spry in a progressive enhancement manner using the
Hijax methodology (see http://domscripting.com/blog/display/41). This progressive enhancement methodology
uses JavaScript to unobtrusively attach event handlers to items on the page, such as links to catch user events (for
example, clicks). Progressive enhancement also lets you replace parts of your document with code fragments that are
delivered asynchronously from the server to avoid having to load an entire page.
AsatrivialexampleofusingSprywiththismethodology,youcouldstartwithanHTMLpagefilledwithstaticdata
and links:
Hijax Demo - Notes 1
Note 1
Note 2
Note 3
This is some static content for note 1.
To progressively enhance this page with Spry, so that you don't have to load an entirely new page when you click the
links, you first use XML to make sure that the page fragments of each page that the links refer to are accessible. The
following example is one way to externalize the static data:
This is some dynamic content for note 1.]]>
This is some dynamic content for note 2.]]>
This is some dynamic content for note 3.]]>
You can then apply Spry to the HTML page in the following manner:
SPRY
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