Spry User Guide - Support - Adobe

var dsPhotos = new Spry.Data.XMLDataSet("/photos.php?galleryid=2000",
"/gallery/photos/photo");
...
// Filter out all rows that don't have a path that begins
// with the letter 's'.
var myFilterFunc = function(dataSet, row, rowNumber)
{
if (row["@path"].search(/^s/) != -1)
return row; // Return the row to keep it in the data set.
return null; // Return null to remove the row from the data set.
}dsPhotos.filter(myFilterFunc); // Filter the rows in the data set.
To get the original data back, call filter() and pass a null argument
dsPhotos.filter(null); // Turn off non-destructive filtering.
Refresh data
Data sets can reload their data at a specified interval expressed in milliseconds. This can be handy when the data at
a given URL changes periodically.
❖ To tell a data set to load at a given interval, pass the optional loadInterval option when calling the XMLDataSet
constructor:
// Load the data every 10 seconds. Turn off the cache to make sure we get it directly from
the server.
var dsPhotos = new Spry.Data.XMLDataSet("/photos.php?galleryid=2000",
"/gallery/photos/photo", { useCache: false, loadInterval: 10000 });
You can also turn on this interval loading programatically with the startLoadInterval() method, and stop it with
the stopLoadInterval() method.
dsPhotos.startLoadInterval(10000); // Start loading data every 10 seconds.
...
dsPhotos.stopLoadInterval(); // Turn off interval loading.
Work with observer notifications
SPRY
User Guide
Observer notifications overview
The XML data set supports an observer mechanism that allows an object or callback function to receive event notifications.
Notification Description
onPreLoad The data set is about to send a request for data. If the data set
depends on other data sets, this event notification will not send until
they are all loaded successfully.
onPostLoad The request for data was successful. The data is accessible.
onLoadError An error occurred while requesting the data.
onDataChanged The data in the data set has been modified.
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