Flash / Flex / ActionScript/Class/interface
Содержание
Creating Interfaces
<source lang="java">
interface InterfaceName {
// Interface code goes here.
}
interface IMessageSender {
private var _msToSend:Message; // Incorrect.
}
</source>
Extends an interface
<source lang="java">
interface ISender {
public function send():void;
} interface IMessageSender extends ISender {
public function setMessage(msObject:Message):void;
}
</source>
Implement an Interface
<source lang="java">
package{
import flash.display.Sprite;
public class Main extends Sprite{
public function Main(){
var srcInstance:ShapeContainer = new ShapeContainer(200, 200);
var cirA:Circle = new Circle(0, 0, 50);
var cirB:Circle = new Circle(0, 0, 400);
var sqA:Square = new Square(0, 0, 100);
var sqB:Square = new Square(0, 0, 200);
var bAdded:Boolean;
bAdded = srcInstance.addShape(cirA);
trace(bAdded);
bAdded = srcInstance.addShape(cirB);
trace(bAdded);
bAdded = srcInstance.addShape(sqA);
trace(bAdded);
bAdded = srcInstance.addShape(sqB);
trace(bAdded);
}
}
} interface IShape {
function getDimensions():Object;
} class Circle implements IShape{
private var _nX:Number;
private var _nY:Number;
private var _nRadius:Number;
public function Circle(nX:Number, nY:Number, nRadius:Number) {
nX = nX;
nY = nY;
nRadius = nRadius;
}
public function getDimensions():Object {
return {width: 2* _nRadius, height: 2 * _nRadius};
}
} class Square implements IShape {
private var _nX:Number;
private var _nY:Number;
private var _nSide:Number;
public function Square(nX:Number, nY:Number, nSide:Number) {
_nX = nX;
nY = nY;
nSide = nSide;
}
public function getDimensions():Object {
return {width: _nSide, height: _nSide};
}
} class ShapeContainer {
private var _aShapes:Array;
private var _nWidth:Number;
private var _nHeight:Number;
public function ShapeContainer(nWidth:Number, nHeight:Number) {
_nWidth = nWidth;
_nHeight = nHeight;
_aShapes = new Array();
}
public function addShape(shObject:IShape):Boolean {
if(shObject.getDimensions().height > _nHeight) {
return false;
}
var nSum:Number = 0;
for(var i:Number = 0; i < _aShapes.length; i++) {
nSum += _aShapes[i].getDimensions().width;
}
if(nSum + shObject.getDimensions().width > _nWidth) {
return false;
}
else {
_aShapes.push(shObject);
return true;
}
}
}
</source>
Implementing an Interface
<source lang="java">
class ClassName implements InterfaceName {
// Class code goes here.
} class ClassName implements Interface1Name, Interface2Name, Interface3Name {
// Class code goes here.
} class ClassName extends SuperClassName implements InterfaceName {
// Class code goes here.
}
</source>
Implement interface
<source lang="java">
class Didgeridoo implements IProduct {
private var _price:uint = 100;
private var _name:String = "Handpainted Didgeridoo";
private var _description:String = "Imported from Australia";
public function get price():uint {
return this._price;
}
public function set price(val:uint):void {
this._price = val;
}
public function get name():String {
return this._name;
}
public function set name(val:String):void {
this._name = val;
}
public function get description():String {
return this._description;
}
public function set description(val:String):void {
this._description = val;
}
}
interface IProduct {
function get price():uint;
function set price(val:uint):void;
function get name():String;
function set name(val:String):void;
function get description():String;
function set description(val:String):void;
}
class TShirt implements IProduct {
private var _price:uint = 20;
private var _name:String = "T-Shirt";
private var _description:String = "Made in China";
public function get price():uint {
return this._price;
}
public function set price(val:uint):void {
this._price = val;
}
public function get name():String {
return this._name;
}
public function set name(val:String):void {
this._name = val;
}
public function get description():String {
return this._description;
}
public function set description(val:String):void {
this._description = val;
}
}
</source>
Implement two interface
<source lang="java">
package{
import flash.display.Sprite;
public class Main extends Sprite{
public function Main(){
var t:TShirt = new TShirt();
trace(t.name);
}
}
} interface IClothing extends IProduct {
function get color():String;
function set color(val:String):void;
function get size():String;
function set size(val:String):void;
}
interface ICustomizable {
function get customPrint():String;
function set customPrint(val:String):void;
}
interface IProduct {
function get price():uint;
function set price(val:uint):void;
function get name():String;
function set name(val:String):void;
function get description():String;
function set description(val:String):void;
}
class TShirt implements IClothing, ICustomizable {
private var _price:uint = 20;
private var _name:String = "T-Shirt";
private var _description:String = "Made in China";
private var _color:String = "black";
private var _size:String = "XXL";
private var _customPrint:String = "";
public function get price():uint {
return this._price;
}
public function set price(val:uint):void {
this._price = val;
}
public function get name():String {
return this._name;
}
public function set name(val:String):void {
this._name = val;
}
public function get description():String {
return this._description;
}
public function set description(val:String):void {
this._description = val;
}
public function get color():String {
return this._color;
}
public function set color(val:String):void {
this._color = val;
}
public function get size():String {
return this._size;
}
public function set size(val:String):void {
this._size = val;
}
public function get customPrint():String {
return this._customPrint;
}
public function set customPrint(val:String):void {
this._customPrint = val;
}
}
</source>
Interface Inheritance
<source lang="java">
public interface IntA {
function methodA ( ):void;
} public interface IntB extends IntA {
function methodB ( ):void;
} public interface IntC {
function methodC ( ):void;
} public interface IntD {
function methodD ( ):void;
} public interface IntE extends IntC, IntD {
function methodE ( ):void;
}
</source>
Interface Syntax and Use
<source lang="java">
interface SomeName {
function method1 (param1:datatype,...paramn:datatype):returnType; function method2 (param1:datatype,...paramn:datatype):returnType; ... function methodn (param1:datatype,...paramn:datatype):returnType;
} class SomeName implements SomeInterface { } A class can legally implement more than one interface by separating interface names with commas. class SomeName implements SomeInterface, SomeOtherInterface { }
</source>
