MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE - Knockout (Glowfilter.knockout Property)

GlowFilter (flash.filters.GlowFilter) 609
knockout (GlowFilter.knockout property)
public knockout : Boolean
Specifies whether the object has a knockout effect. A value of true makes the object's fill
transparent and reveals the background color of the document. The default is
false (no
knockout effect).
Availability: ActionScript 1.0; Flash Player 8
Example
The following example changes the
knockout property on an existing movie clip when a user
clicks it.
import flash.filters.GlowFilter;
var mc:MovieClip = createGlowFilterRectangle("GlowFilterKnockout");
mc.onRelease = function() {
var filter:GlowFilter = this.filters[0];
filter.knockout = true;
this.filters = new Array(filter);
}
function createGlowFilterRectangle(name:String):MovieClip {
var rect:MovieClip = this.createEmptyMovieClip(name,
this.getNextHighestDepth());
var w:Number = 100;
var h:Number = 100;
rect.beginFill(0x003366);
rect.lineTo(w, 0);
rect.lineTo(w, h);
rect.lineTo(0, h);
rect.lineTo(0, 0);
rect._x = 20;
rect._y = 20;
var filter:GlowFilter = new GlowFilter(0x000000, .8, 16, 16, 1, 3, false,
false);
var filterArray:Array = new Array();
filterArray.push(filter);
rect.filters = filterArray;
return rect;
}