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._x Property
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.
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ActionScript Language Reference
pixel is a pixel that contains a shape, graphic, button, movie clip, text field, or other
content element. Changes made to a clip’s width in the authoring tool or via
_xscale are
reflected by
_width.
Setting the value of
_width resizes a movie clip horizontally. Attempts to set _width to a
negative value are ignored. Setting a clip’s
_width to 0 does not hide the clip; it turns it into
a one-pixel vertical line. Flash’s basic unit of measure is a twentieth of a pixel (a “twip”), so
the shortest legal
_width change is .05 pixels. Smaller increments are ignored:
trace(ball_mc._width); // Displays: 100
ball_mc._width += .01;
trace(ball_mc._width); // Still displays 100. The assignment had no effect.
The _width of the main movie (either _root._width or _leveln._width) is not the Stage
width as specified under Modify
➝ Document ➝ Dimensions (or Modify ➝ Movie ➝
Dimensions in Flash 5) in the authoring tool, but rather the width of the contents of the
main movie. As of Flash 6, the movie’s specified dimensions are available via
Stage.height
and Stage.width.
For a loading movie, the
_width property returns undefined until the movie has completely
loaded.
Usage
Note that when we set the width of a movie clip, lines are scaled proportionally, losing ...
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