MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Uživatelský manuál stáhnout pdf (Strana 6)

Adobe Flash CS3 Classroom in a Book

• The Down state appears when the button is clicked.

• The Hit state deﬁnes the button’s active area, which

is the area that responds to the mouse rolling over or

clicking the button.

Converting objects to symbols

In the Convert To Symbol dialog box, you name the

symbol, select a symbol type, and specify a registration

point.

A symbol’s name, and especially an instance name,

should always be lowercase or camelcase. In camelcase,

a name begins with a lowercase letter, but each concat-

enated word is capitalized. For example, pourBottle is a

symbol name in camelcase. Avoid capitalizing symbol

and instance names because ActionScript reserves capi-

tal letters for speciﬁc classes and other keywords.

The registration point determines the point at which

Flash reports the coordinates of the symbol, and from

which it resizes or transforms the symbol.

Adding transparency

Transparency, or inversely, opacity, is determined by

the alpha value for a symbol or a color. Decreasing

the alpha value decreases the opacity and increases

the transparency. You can change the alpha value for a

symbol—which affects every instance of that symbol—

or for a single instance.

LESSON 3

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MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Uživatelský manuál Strana 6