Victor Rasputnis

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In Part 1 (CFDJ, Vol. 8, issue 10) we introduced the destination-aware grid, formatters, and renderers. In this article we are continuing our discussion about datagrid renderers and... RadioButtonGroupBox as Drop-In Renderer We can apply similar techniques to RadioButton controls. The following code snippet suggests how the group of RadioButton controls can be used as a drop-in item renderer (and editor). Instead of an onValue/offValue pair, we are introducing an array of options (we could have gone further and upgraded to , which is similar to the ButtonBar and LinkBar controls):                       more)

Intelligent Web Applications with AJAX

Browser-based applications are widely used and we like the fact that we can access them from anywhere. But from the users' perspective, the productivity level of Web applications still doesn't approximate the productivity of desktop programs. The good news is the gap is closing: the accumulated potential of multiple technologies has boosted a whole new breed of HTML-based apps that are as powerful as the desktop ones. Meet AJAX. What Is AJAX? The name stands for Asynchronous JavaScript + XMLHTTPRequest and means you can establish socket communication between browser-based JavaScri... (more)

Flex Best Practices: DTO is the Horseshoe of your Flex Application

Remember this old little rhyme? For want of a nail, the shoe was lost; For want of the shoe, the horse was lost; For want of the horse, the rider was lost; For want of the rider, the battle was lost; For want of the battle, the kingdom was lost; And all for the want of a horseshoe nail. This little poem often comes to my mind as a see increasing number of amateurs perceiving Flex as yet another "library of controls".  The fact is, it is very easy to start coding in Flex. So much that hot-heads get on the coding spree before noticing that Flex is a beautifully crafted framework with pro... (more)

Using Custom Type Marshallers in BlazeDS

I'd like to use this opportunity and invite Flex developers living in Europe to attend our Advanced Flex Master Class in Brussels, Belgium on March 1 and 2, 2010. In my previous post I pointed to the BlazeDS classes that need to be replaced in order to prevent ActionScript Number.NaN from turning into Long or Integer zeroes on the MessageBroker side. The recommendation boiled down to re-jaring flex-messaging-core.jar or placing the modified classes somewhere earlier in the application server's classpath. If neither option is allowed, you may configure your endpoint with the cust... (more)

Deploy Your PowerBuilder Applications On The Web

The ability to deploy applications on the Internet or intranet has become essential for application development, especially when developing new applications with Internet/J2EE-compatible tools. For PB developers this meant that instead of a single high-level integrated environment, they had to use low-level tools and a multitude of languages and technologies, and write more code while delivering less functionality. The problem became even more apparent when they needed to transfer existing applications to the Web. As we'll see in this article, this is no longer the case. Deploymen... (more)