MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Uživatelský manuál stáhnout pdf (Strana 10)

Adobe Flash CS3 Classroom in a Book

Lesson 6: Creating Interactive Files

Lesson 6 emphasizes interactivity, especially through

the use of buttons and audio ﬁles. Students manipu-

late gradients, nest multiple kinds of symbols within

a single symbol, and prepare a ﬁle for ActionScript.

Lesson 7 introduces ActionScript fully, but the Lesson

6 ﬁle contains ActionScript that is summarized in a

sidebar.

Creating buttons

The buttons in this lesson are button symbols that

include nested movie clip and graphic symbols. Review

the kinds of symbols and the beneﬁts of each. But-

ton symbols contain rollover states in their Timelines.

Movie clip symbols can have drop shadows applied

and include Timelines that can be animated just as the

main Timeline can be. Graphic symbols let you repeat a

single image multiple times without having to include

the data multiple times. Additionally, you can create a

graphic symbol that contains multiple images, and use

a different image in each instance of the symbol.

Aligning buttons

The Align panel makes it easy to align or evenly space

objects horizontally or vertically. You can align objects

relative to the Stage or relative to each other. Demon-

strate the options in the Align panel, and encourage

students to experiment so that they are familiar with

the different options.

Activating the buttons

The buttons’ rollover states work without ActionScript,

but ActionScript is required if the button clicks are

to have any effect otherwise. Though students do not

create ActionScript in this lesson, they do learn how

to name instances and prepare a ﬁle for ActionScript.

Emphasize the importance of naming instances so

ActionScript can refer to them.

When naming instances, use lowercase or camelcase.

It’s often helpful to name an instance with an extension

that identiﬁes its symbol type. Flash designers typically

name instances of movie clip symbols with an _mc

extension, button symbols with a _btn extension, and

graphic symbols with a _gr extension.

Name instances in a way that is meaningful, so you’ll

remember what you’ve called them when you’re writing

ActionScript. Shorter names are easier to type without

error, but longer names may be easier to remember and

to identify when you’re editing the ActionScript later.

The ActionScript behind the scenes

Encourage students to view the ActionScript that is in-

cluded in the lesson ﬁle. Select frame 9 on the Actions

layer in the main Timeline, and then choose Window >

Actions to open the Actions panel.

The ActionScript used in the lesson is described in the

sidebar at the end of the lesson. Students will learn

about ActionScript in Lesson 7 and can refer back to

the ActionScript used in Lesson 6.

LESSON 6

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 20 21

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