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Hello! Flex 4 by Peter Armstrong

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Chapter 5. Halo Flex 4: Using DataGrid, Navigator Containers, and Popups

Way back in Session 5 we discussed that there was a namepsace (library://ns.adobe.com/flex/halo) full of the old Halo components that were used in Flex 1 through Flex 3. I showed an example of an app built using only Halo components. It was simple, featuring containers like HBox and Panel and controls like List and Button. Since they’re in a different namespace, these Panel, List, and Button classes are different from the Spark ones. This separate namespace is a bit awkward at first but is far preferable to the original idea, which was to use a horrible Fx prefix on the new Spark components.

We left Halo at that point and we haven’t revisited it—until now. In this chapter ...

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