Flex 3 in Action

Chapter 21. Drag-and-drop

This chapter covers: Controlling when dragging and dropping is allowed Supporting a multi-item drag-and-drop operation Building custom drag-and-drop functionality Customizing the drag-and-drop experience

When Flex first came out, drag-and-drop (D&D) was a key feature that set the tone for what RIAs are capable of. From a developer’s perspective, Flex’s D&D feature is easy to implement because many components provide a built-in mechanism to support it. At the same time, you can hook into and override any of the default behavior throughout the stages of the process.

In this book, we want to show you not just how to do something but also why to do something. We don’t want you doing D&D just for the sake of it, or because it’s ...