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I will publish a list containing links to ActionScript resources as a separate document. Search for ActionScript Resources in theConnexions search box.
Complete listings of the ActionScript and MXML files discussed in this lesson are provided in Listing 10 through Listing 16 below.
<?xml version="1.0" encoding="utf-8"?><!--Illustrates polymorphism using an interface.--><mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml"xmlns:cc="CustomClasses.*"><cc:Driver/></mx:Application> package CustomClasses{
import flash.events.*;import mx.containers.HBox;import mx.containers.VBox;
import mx.controls.Button;import mx.controls.Label;
import mx.controls.TextArea;public class Driver extends VBox{private var textArea:TextArea = new TextArea();
private var myShape:IArea;private var randomChoice:Number;private var radius:uint;
private var rectWidth:uint;private var rectHeight:uint;public function Driver(){//constructor
var label:Label = new Label();label.text = "Interface Polymorphism Demo";
label.setStyle("fontSize",14);label.setStyle("color",0xFFFF00);
addChild(label);//Put three buttons in an HBoxvar hbox:HBox = new HBox();
addChild(hbox);var areaButton:Button = new Button();areaButton.label = "Area";
hbox.addChild(areaButton);var circButton:Button = new Button();circButton.label = "Circumference";
hbox.addChild(circButton);var volumeButton:Button = new Button();volumeButton.label = "Volume";
hbox.addChild(volumeButton);//Put the text area below the HBox.textArea.width = 245;
textArea.height = 80;addChild(textArea);//Register a click event handler on each of the
// buttonsareaButton.addEventListener(
MouseEvent.CLICK,areaButtonHandler);circButton.addEventListener(MouseEvent.CLICK,circButtonHandler);volumeButton.addEventListener(
MouseEvent.CLICK,volumeButtonHandler);}//end constructor//Local utility method for getting and saving four
// random values.private function getRandomValues():void{
randomChoice = Math.random();radius = uint(10*Math.random() + 1);
rectWidth = uint(10*Math.random() + 1);rectHeight = uint(10*Math.random() + 1);
}//end getRandomValues//Define click event handler methods.private function areaButtonHandler(
event:MouseEvent):void{getRandomValues();if(randomChoice<0.5){
myShape = new MyCircle(radius);}else{
myShape = new MyRectangle(rectWidth,rectHeight);}//end else
textArea.text = myShape.id() + myShape.area();}//end areaButtonHandler
private function circButtonHandler(event:MouseEvent):void{
getRandomValues();if(randomChoice<0.5){
myShape = new MyCircle(radius);}else{
myShape = new MyRectangle(rectWidth,rectHeight);}//end else
textArea.text = myShape.id() +myShape.circumference();
}//end circButtonHandlerprivate function volumeButtonHandler(event:MouseEvent):void{
getRandomValues();if(randomChoice<0.5){
myShape = new MyCircle(radius);}else{
myShape = new MyRectangle(rectWidth,rectHeight);}//end else
textArea.text = myShape.id() + myShape.volume();}//end circButtonHandler
}//end class}//end package
package CustomClasses{
public interface IArea extends IVolume,ICircumference{function area():String;
function id():String;}//end interface
}//end package package CustomClasses{
public interface IVolume{function volume():String;
}//end interface}//end package package CustomClasses{
public interface ICircumference{function circumference():String;
}//end interface}//end package package CustomClasses{
public class MyCircle implements IArea{private var radius:Number;public function MyCircle(radius:Number){//constructor
this.radius = radius;}//end constructorpublic function area():String{
return "Radius = " + radius + "\n" +"Area = " + Math.PI * radius * radius;
}//end areapublic function id():String{return "Circle\n";
}//end idpublic function circumference():String{return "Radius = " + radius + "\n" +
"Circumference = " + 2 * Math.PI * radius;}//end function circumferencepublic function volume():String{
//Assumes that the shape is a cylinder with a// depth of ten units.
return "Radius = " + radius + "\n" +"Depth = 10\n" +
"Volume = " + 10 * Math.PI * radius * radius;}//end area}//end class
}//end package package CustomClasses{
public class MyRectangle implements IArea{private var width:Number;
private var height:Number;public function MyRectangle(width:Number,height:Number){//constructor
this.width = width;this.height = height;
}//end constructorpublic function area():String{
return "Width = " + width + "\n" +"Height = " + height + "\n" +
"Area = " + width * height;}//end areapublic function id():String{
return "Rectangle\n";}//end idpublic function circumference():String{
return "Width = " + width + "\n" +"Height = " + height + "\n" +
"Circumference = " + 2 * (width + height);}//end function circumferencepublic function volume():String{
//Assumes that the shape is a rectangular solid// with a depth of ten units.
return "Width = " + width + "\n" +"Height = " + height + "\n" +
"Depth = 10\n" +"Volume = " + 10 * width * height;
}//end area}//end class}//end package This section contains a variety of miscellaneous materials.
-end-
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