MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador descarregar pdf (Página 135)

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CHAPTER 11

Use List-based

Form Controls

You can use list-based form controls such as a ComboBox, List, or HorizontalList in your

Adobe Flex applications. After inserting this kind of control, you must populate it with items

to display and values to submit for processing. In Flex, the controls are populated by data

providers, which are collections of objects similar to arrays.

This lesson shows you how to populate list-based form controls with items to display and

values to process.

In this lesson, you’ll complete the following tasks:

Set up your project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Insert and position controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Populate the list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Associate values with list items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Set up your project

Before you begin this lesson, perform the following tasks:

■ If you haven’t already done so, create the Lessons project in Adobe Flex Builder. See

“Create the Lessons project” on page 101.

■ Ensure that the automatic build option is enabled in Flex Builder. This option is enabled

by default in the standalone configuration of Flex Builder but not in the plug-in

configuration. To enable it, select Project > Build Automatically.

Insert and position controls

In this section, you create a simple layout containing a ComboBox control and a submit

button.

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador Página 135