MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Uživatelský manuál stáhnout pdf (Strana 5)

Adobe Flash CS3 Classroom in a Book

Lesson 3: Creating and Editing Symbols

Lesson 3 uses a sample project to introduce symbols,

instances, and imported Illustrator ﬁles as students

create a DVD interface. Students learn about buttons,

rollover states, and transparency, as well.

Importing Illustrator les

Flash lets you import Illustrator AI ﬁles, and to a large

extent preserves the artwork’s editability and visual

ﬁdelity. The AI Importer also provides a great degree

of control in determining how Illustrator artwork is

imported into Flash, letting you specify how to import

speciﬁc objects into an AI ﬁle.

The Flash AI Importer provides the following key

features:

• Preserves editability of the most commonly used

Illustrator effects as Flash ﬁlters.

• Preserves editability of blend modes that Flash and

Illustrator have in common.

• Preserves the ﬁdelity and editability of gradient ﬁlls.

• Maintains the appearance of RGB (red, green, blue)

colors.

• Imports Illustrator Symbols as Flash Symbols.

• Preserves the number and position of Bezier control

points.

• Preserves the ﬁdelity of clip masks.

• Preserves the ﬁdelity of pattern strokes and ﬁlls.

• Preserves object transparency.

• Converts the AI ﬁle layers to individual Flash layers,

keyframes, or a single Flash layer. You can also import

the AI ﬁle as a single bitmap image, in which case Flash

ﬂattens (rasterizes) the ﬁle.

• Provides an improved copy-and-paste workﬂow

between Illustrator and Flash. A copy-and-paste dialog

box provides settings to apply to AI ﬁles being pasted

onto the Flash stage.

You specify how artwork is imported in the Import

dialog box. You can select which layers—and which

content on each layer—to import. Flash can import

Illustrator layers as Flash layers, as a single layer, as

keyframes, or as symbols.

In this lesson, students import an Illustrator ﬁle

with layers that become Flash layers to make up the

background of the DVD interface. However, many of

the same options are available when copying and past-

ing artwork. If Illustrator is installed on the computer,

open the Illustrator ﬁle and copy and paste, or drag and

drop, artwork from it to the Stage in Flash to demon-

strate how the options are similar.

About symbols

A symbol is a graphic, button, or movie clip that you

create once in Flash and then reuse throughout the

document or in other documents. A symbol can in-

clude artwork imported from another application. Any

symbol that you create automatically becomes part of

the library for the current document.

An instance is a copy of a symbol located on the Stage

or nested inside another symbol. An instance can be

different from its symbol in color, size, and function.

Editing the symbol updates all of its instances, but ap-

plying effects to an instance of a symbol updates only

that instance.

Using symbols in documents dramatically reduces

ﬁle size; saving several instances of a symbol requires

less storage space than saving multiple copies of the

contents of the symbol. For example, you can reduce

the ﬁle size of a document by converting static graph-

ics, such as background images, into symbols and then

reusing them. Using symbols can also speed SWF ﬁle

playback, because a symbol needs to be downloaded to

Flash Player only once.

Movie clip symbols, button symbols, and graphic

symbols each have beneﬁts and limitations. Create one

of each, and then show students the differences in the

Timeline and in the Property inspector for each.

Button symbols automatically include rollover states in

the Timeline. Demonstrate each rollover state: Up, Over,

Down, and Hit.

• The Up state determines the button’s default appearance

when the mouse is nowhere near it.

• The Over state appears when the mouse rolls over the

button.

LESSON 3

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