Victor Rasputnis

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Top Stories by Victor Rasputnis

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. This question we get on almost every new client project: “We’re struggling with handling of null values for numeric data types in Flex/Java projects. Every time there’s an update, we end up replacing the original nulls with zeros when the user didn’t actually change that value.  Have you guys come up with a silver bullet for handling numeric nulls?” Consider a Java method with a Double parameter. You pass uninitialized ActionScript Number, that is, Number.NaN. What will BlazeDS deserialize (unmarshal)? Double.NaN. At this point your Java code may use something like (value==Double.NaN)?null:value, capitalizing on the fact that information about special value of NaN had been delivered from your client code t... (more)

Rich Internet Applications with Adobe Flex 2 and Java

A typical Java developer knows that when you need to develop a GUI for a Java application, Swing is the tool. Eclipse SWT also has a number of followers, but the majority of people use Java Swing. For the past 10 years, it was a given that Swing development wouldn't be easy; you have to master working with the event-dispatch thread, GridBaglayout, and the like. Recently, the NetBeans team created a nice GUI designer called Matisse, which was also ported to MyEclipse. Prior to Matisse, JBuilder had the best Swing designer, but it was too expensive. Now a good designer comes with N... (more)

Adobe Flex 2: Advanced DataGrid

In any GUI tool, one of the most popular components is the one that shows data in a table format like JTable in Java or Datawindow in PowerBuilder. The Adobe Flex 2 version of such a component is called DataGrid. In any UI framework, the robustness of such a component depends on formatting and validating utilities as well as a whole suite of data input controls: CheckBoxes, ComboBoxes, RadioButtons, all sorts of Inputs, Masks, and so on. Using theatrical terminology, the role of the king is played by his entourage. Practically speaking, touching up the DataGrid is touching up a ... (more)

The Value-Aware ComboBox

What I love about Adobe Flex is that it is a framework in addition to a pretty impressive library of off-the-shelf controls, which can fit the bill for many of the Rich Internet Applications. Flex enables you to create new and extend existing components with a simplicity and elegance hardly ever offered by other GUI development systems. In this article I'll show you how to start extending a standard ComboBox component, which is a combination of edit field, button and a dropdown list. We will be customizing the API and adding some new functionality, making our ComboBox a bit handi... (more)

Multi-Tier Application Development with Adobe Flex

This excerpt describes the process of creating a complete Flex-Java distributed application. Upgrading Flex applications to Java Enterprise Edition applications is done with Flex Data Services. FDS provides transparent access to POJO, EJBs, and JMS and comes with adapters for frameworks like Spring and Hibernate. These powerful capabilities come free for a single-CPU server, otherwise see your local Adobe dealer. Flex can also invoke any SOAP Web Service or send an HTTP request to any URL via Web Services and HTTPService components. Here we will illustrate Flex controls, HTTPSer... (more)