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Figure 6-6. Dragging and dropping between two lists

This will add “Bad sci-fi” to the list of things I like.

realize that this may seem like a silly example because you

may have custom drag-and-drop requirements. But believe me

when I tell you that building your own components so that they

work with the drag-and-drop manager is very easy to do.

States and Transitions

Built into the core of the Flex API is support for different

states in the user interface. For example, a box can be open or

closed. Or a viewing area could be in two rows or three rows.

You can define these states based on your needs and then set

the parameters for each component that changes in each state.

To demonstrate I’ll make a box that gets taller in the open state

and shorter in the closed state. The example starts with a Flex

88 | Chapter 6: More Flex Applications

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Manuale Utente Pagina 104