MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador Página 151

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13
CHAPTER 13
Use Behaviors
Adobe Flex behaviors let you add animation and motion to your application in response to
user or programmatic action. A behavior is a combination of a trigger paired with an effect. A
trigger is an action, such as a mouse click on a component, a component getting focus, or a
component becoming visible. An effect is a visible or audible change to the target component
that occurs over a period of time, measured in milliseconds. Examples of effects are fading,
resizing, or moving a component.
This lesson shows you how to add behaviors to a Flex user interface. It shows you how to use
MXML to create behaviors, how to invoke an effect from a different component, and how to
combine more than one effect to create a composite effect.
In this lesson, you’ll complete the following tasks:
Set up your project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
Create a behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Invoke an effect from a different component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Create a composite effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Set up your project
Before you begin this lesson, ensure that you perform the following tasks:
If you have not already done so, create the Lessons project in Adobe Flex Builder. For
more information, 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.
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