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jaxcent  

 

An overview of using Jaxcent

Classes written to process HTML pages via Jaxcent, must extend jaxcent.JaxcentPage class. They can override and use various methods in the base class. Typically in Jaxcent classes, you declare and initialize one or more fields corresponding to one or more HTML tags on the page. You can access methods and properties of these HTML tags directly from your Jaxcent class.

Jaxcent has classes corresponding to various HTML tags. The class HtmlElement is a catch-all class that you can use if you are not particular about using the exact matching class.

When you create an object of a class corresponding to an HTML tag, Jaxcent needs a way to locate the actual tag on the HTML page. This is done by providing a "search" method. The default (and recommended) search method is to search by the "ID" field. This requires adding an ID attribute to the HTML field, and then specifying the same ID string to the corresponding Jaxcent object's constructor.

There are other methods of locating the HTML tags on the page, as well, such as searching by the tag or by NAME or by TYPE (applies to INPUT tags).

New elements can be created by using the jaxcent.SearchType.createNew argument as the search-type.

If you are interested in receiving events from any of the objects you have created, simply override the event method.

The processing typically starts by overriding the onLoad method of jaxcent.JaxcentPage class, or from event handlers. Before the onLoad method is called (i.e. in the constructor), data cannot be retrieved from the HTML page, because the page has not loaded yet. However, data can be sent out, and values of fields can be set in the constructor. These will get queued up, and will be processed when the page does get loaded.