December 2002
Intermediate to advanced
1088 pages
192h 4m
English
Content preview from ActionScript for Flash MX: The Definitive Guide, Second Edition
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MovieClip Class
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ActionScript Language Reference
Description
MovieClip is not just a class in ActionScript; it is also a unique ActionScript datatype used
to represent information about, and allow control of, movies and movie clips. For most
purposes, we treat movie clips and movies as objects; we can create and access movie clip
properties, and we can create and invoke movie clip methods. For a full consideration of
the MovieClip class, see Chapter 13.
We do not use a constructor to create new MovieClip instances. Instead, we create movie
clip symbols in the authoring tool and place instances on the Stage manually. Some
methods, however, allow us to copy existing clips (e.g., duplicateMovieClip()) or add new
clips to the Stage programmatically (e.g., attachMovie() and createEmptyMovieClip()).
Not all MovieClip objects are equal; some MovieClip methods and properties apply to
movie clip instances only, not to main movies (a main movie is the
_root timeline of a .swf
document). In our consideration of the MovieClip properties and methods, we’ll note cases
in which functionality is limited to one type of MovieClip object. Note that we use the word
MovieClip to refer to the “class” of the objects, and the word movieclip (lowercase) to refer
to the ActionScript datatype; we use the words ...
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