MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH - Page 510

510 Animation, Filters, and Drawings
To use the drop shadow filter:
1. Create a new Flash document and save it as dropshadow.fla.
2. Add the following ActionScript to Frame 1 of the Timeline:
// import the filter classes
import flash.filters.DropShadowFilter;
// create a movie clip called shapeClip
this.createEmptyMovieClip("shapeClip", 1);
// use the Drawing API to draw a shape
with (shapeClip) {
beginFill(0xFF0000, 100);
moveTo(0, 0);
lineTo(100, 0);
lineTo(100, 100);
lineTo(0, 100);
lineTo(0, 0);
endFill();
}
// position the shape
shapeClip._x = 100;
shapeClip._y = 100;
// click the square, increase shadow strength
shapeClip.onPress = function():Void {
dropShadow.strength++;
shapeClip.filters = [dropShadow];
};
// create a filter
var dropShadow:DropShadowFilter = new DropShadowFilter(4, 45, 0x000000,
0.4, 10, 10, 2, 3);
var mouseListener:Object = new Object();
// create and apply a listener that controls the filter when the mouse
moves
mouseListener.onMouseMove = function():Void {
dropShadow.distance = (_xmouse / Stage.width) * 50 - 20;
dropShadow.blurX = (_ymouse / Stage.height) * 10;
dropShadow.blurY = dropShadow.blurX;
shapeClip.filters = [dropShadow];
};
Mouse.addListener(mouseListener);
The first section of code creates a new movie clip and uses the Drawing API to draw a red
square. The second section of code defines a mouse listener, which is called whenever the
mouse moves. The mouse listener calculates the drop shadow’s distance and level of
blurring based on the current x and y positions of the mouse pointer, and reapplies the
drop shadow filter. If you click the red square, the drop shadow’s strength increases.