ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Display programming
import flash.display.Loader;
import flash.events.MouseEvent;
import flash.geom.Transform;
import flash.geom.ColorTransform;
import flash.net.URLRequest;
// Load an image onto the Stage.
var loader:Loader = new Loader();
var url:URLRequest = new URLRequest("http://www.helpexamples.com/flash/images/image1.jpg");
loader.load(url);
this.addChild(loader);
// This function is called when the mouse moves over the loaded image.
function adjustColor(event:MouseEvent):void
{
// Access the ColorTransform object for the Loader (containing the image)
var colorTransformer:ColorTransform = loader.transform.colorTransform;
}
// Set the red and green multipliers according to the mouse position.
// The red value ranges from 0% (no red) when the cursor is at the left
// to 100% red (normal image appearance) when the cursor is at the right.
// The same applies to the green channel, except it's controlled by the
// position of the mouse in the y axis.
colorTransformer.redMultiplier = (loader.mouseX / loader.width) * 1;
colorTransformer.greenMultiplier = (loader.mouseY / loader.height) * 1;
// Apply the changes to the display object.
loader.transform.colorTransform = colorTransformer;
loader.addEventListener(MouseEvent.MOUSE_MOVE, adjustColor);
Rotating objects
Flash Player 9 and later, Adobe AIR 1.0 and later
Display objects can be rotated using the rotation property. You can read this value to find out whether an object has
been rotated, or to rotate the object you can set this property to a number (in degrees) representing the amount of
rotation to be applied to the object. For instance, this line of code rotates the object named square 45 degrees (one
eighth of one complete revolution):
square.rotation = 45;
Alternatively, you can rotate a display object using a transformation matrix, described in “Working with geometry” on
page 209.
Fading objects
Flash Player 9 and later, Adobe AIR 1.0 and later
You can control the transparency of a display object to make it partially (or completely transparent), or change the
transparency to make the object appear to fade in or out. The DisplayObject class’s alpha property defines the
transparency (or more accurately, the opacity) of a display object. The alpha property can be set to any value between
0 and 1, where 0 is completely transparent, and 1 is completely opaque. For example, these lines of code make the
object named myBall partially (50 percent) transparent when it is clicked with the mouse:
Last updated 6/6/2012
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