Loading Dynamic HTML Content Using the Dijit ContentPane [con't]
A More Complex Dijit ContentPane Example
We can use the ContentPane widget's dynamic content support to display a series of HTML documents. To give the exercise some realism, I chose to integrate the StockInfo widget that I created for my Using the Dojo Framework to Build Custom HTML Widgets article into another page. It displays financial information on common commodities such as gold and crude oil, much like you would see on a site like the Yahoo! Finance. Widget components include a small graph as well as a list of details relating to that commodity. When we're done the page will iterate through four commodities.
This example makes a strong case for proper separation of style (CSS), content (HTML), and behavioral components (Scripts) in that all of the StockInfo widgets share all the same components except for the tag attributes that set its unique values. The best approach in my books is to include all of the external file references in the containing HTML page. That leaves only the widget's HTML markup in the file:
The following line will import the StockInfo widget's stylesheet into the main document:
The StockInfo widget was designed to work with a local copy of Dojo so we should replace the script tags with those from the widget's HTML:
We can also move the code into our main script block so that we can effectuate any modifications to the widget in one place:
Both the StockInfo HTML files and current index are stored in variables to make it easy to iterate through them:
There is no need
for a loop because the iterating is event based. In the
fadeIn is applied to the first widget instance. The
onEnd() event is fired
when the animation has completed. At that point, a
fadeOut() occurs after a
delay of eight seconds. In its
onEnd() event, the contentPane's
href is set
to the next widget's HTML file. Closures are used to bind the
the inner functions, although we could just as easily fetch it when needed using
Download the source files here, if you'd like to try it out (note that they do not include the Dojo libraries!).
Here's more information on some of today's topics:
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Original: April 23, 2010