FLASH® LITE™ 2.x - Adobe Help and Support

The setMask() method allows multiple-frame movie clips with complex, multilayered
content to act as masks (which is possible by using mask layers). If you have device fonts in a
masked movie clip, they are drawn but not masked. You can't set a movie clip to be its own
maskfor example, my_mc.setMask(my_mc).
If you create a mask layer that contains a movie clip, and then apply the setMask() method
to it, the setMask() call takes priority and this is not reversible. For example, you could have
a movie clip in a mask layer called UIMask that masks another layer that contains another
movie clip called UIMaskee. If, as the SWF file plays, you call UIMask.setMask(UIMaskee),
from that point on, UIMask is masked by UIMaskee.
To cancel a mask created with ActionScript, pass the value null to the setMask() method.
The following code cancels the mask without affecting the mask layer in the Timeline.
UIMask.setMask(null);
You can extend the methods and event handlers of the MovieClip class by creating a subclass.
Parameters
mc:Object - The instance name of a movie clip to be a mask. This can be a String or a
MovieClip.
Example
The following code uses the circleMask_mc movie clip to mask the theMaskee_mc movie
clip:
theMaskee_mc.setMask(circleMask_mc);
_soundbuftime (MovieClip._soundbuftime property)
public _soundbuftime : Number
Specifies the number of seconds a sound prebuffers before it starts to stream.
Note: Although you can specify this property for a MovieClip object, it is actually a global
property that applies to all sounds loaded, and you can specify its value simply as
_soundbuftime. Setting this property for a MovieClip object actually sets the global property.
See also
_soundbuftime property
startDrag (MovieClip.startDrag method)
public startDrag([lockCenter:Boolean], [left:Number], [top:Number],
[right:Number], [bottom:Number]) : Void
466 ActionScript classes