Photo Viewer tutorial in Flash CS3 using Actionscript 3 part 3

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By now you have set up the stage in the .fla and the Document class (main class) in the previous part 2 of these tutorials. Now we will look at the other classes used to make up this application. In this part of the series you will learn how classes are embedded and then called using class paths eg = desktop.computer.programmefiles.flash is a class path. Its basically how actionscript reads where a file is located within a lot of folders as like a address. if you look back at part 1 you will see the class paths for the classes we are going to learn about now.

Class explanations continuously being updated

Firstly the BevelButton.as

package com.learning.as3et.PhotoViewer.UI.Assets{

    import flash.display.MovieClip

    import flash.display.Shape

    import flash.display.SimpleButton

    import flash.events.MouseEvent

    import flash.text.TextField

    import flash.filters.DropShadowFilter



    public class BevelButton extends MovieClip{

        var buttonTxt:TextField = new TextField();





        public function BevelButton (){



        var    button:SimpleButton = new SimpleButton();

        var up:Shape = new Shape()

        up.graphics.lineStyle(0, 0xFFFFFF, 1);

        up.graphics.beginFill (0×000000);

        up.graphics.drawRect (0, 0, 90, 30);

        up.graphics.endFill();

        button.upState = up;

        button.x = 5

        button.y = -20

        buttonTxt.text = "Start / Stop";

        buttonTxt.x = button.x;

        buttonTxt.y = button.y;

        buttonTxt.height = 20;

        buttonTxt.backgroundColor = 0xffffff;

        buttonTxt.textColor = 0xffffff

        addChild(button);

        addChild(buttonTxt);



        var over:Shape = new Shape()

        over.graphics.lineStyle(0, 0xCCCCCC, 1);

        over.graphics.beginFill (0×000000);

        over.graphics.drawRect (0, 0, 100, 40);

        over.graphics.endFill();

        button.filters = [new DropShadowFilter(10,45,0×222222,1,10,10)]

        button.overState = over;



        var down:Shape = new Shape()

        down.graphics.lineStyle(0, 0xCCCCCC, 1);

        down.graphics.beginFill (0×000000);

        down.graphics.drawRect (0, 0, 110, 45);

        down.graphics.endFill();

        button.downState = down;



        button.hitTestState = up;



        button.doubleClickEnabled = true;



        button.addEventListener(MouseEvent.CLICK, onClick)

        button.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown);

        button.addEventListener(MouseEvent.MOUSE_UP, mouseUp);

        button.addEventListener(MouseEvent.DOUBLE_CLICK, onDoubleClick);

        }



    private function onClick (event:MouseEvent):void{

        trace ("Click");

    }

    private function mouseDown(event:MouseEvent):void{

        trace ("mouse down");

    }

    private function mouseUp (event:MouseEvent):void{

        trace ("Mouse up");

    }

    private function onDoubleClick (event:MouseEvent):void{

        trace ("Double clicked");

    }



    }

}

Next the SlideShowViewer.as

package com.learning.as3et.PhotoViewer.UI{



    import flash.display.Sprite;

    import flash.display.Loader;

    import flash.display.Bitmap;

    import flash.display.BitmapData;

    import flash.utils.Timer;

    import flash.events.TimerEvent;

    import flash.geom.Matrix;

    import flash.geom.Rectangle;

    import flash.geom.Point;

    import flash.events.Event;

    import flash.net.URLRequest;



    public class slideShowViewer extends Sprite {

        private var _loader:Loader;

        private var _bitmap:Bitmap;

        private var _bitmapData:BitmapData;

        private var _dissolveTimer:Timer;

        private var _randomValue:uint;

        private var _temporaryBitamapData:BitmapData;



        public function slideShowViewer() {

            _loader = new Loader();

            _loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoadMain);

            _bitmapData = new BitmapData(200, 200, true, 0xffffff);

            _bitmap = new Bitmap(_bitmapData);

            addChild(_bitmap);

            _dissolveTimer = new Timer(10, 30);

            _dissolveTimer.addEventListener(TimerEvent.TIMER, onDissolveTimer);

        }

        public function loadNext(imageUrl:String):void {

            var request:URLRequest = new URLRequest(imageUrl);

            _loader.load(request);

        }

        private function onLoadMain(event:Event):void{

            var scaleFactor:Number = 200 / Math.max(_loader.width, _loader.height);

            _temporaryBitamapData = new BitmapData(200, 200, true, 0xffffff);

            var offSetX:Number = (200 - _loader.width * scaleFactor) /2;

            var offSetY:Number = (200 - _loader.height * scaleFactor) /2;

            _temporaryBitamapData.draw(_loader, new Matrix(scaleFactor, 0, 0, scaleFactor, offSetX, offSetY));

            _randomValue = 0;

            _dissolveTimer.reset();

            _dissolveTimer.start();

        }

        private function onDissolveTimer(event:TimerEvent):void {

            _randomValue = _bitmapData.pixelDissolve(_temporaryBitamapData, new Rectangle(0,0,200,200), new Point(0,0), _randomValue, 200*200/20);

        }

    }

}

And finally the Thumbnail.as

package com.learning.as3et.PhotoViewer.UI{

    import flash.display.Sprite

    import flash.display.Loader

    import flash.net.URLRequest

    import flash.events.MouseEvent

    import flash.events.Event

    import flash.filters.DropShadowFilter



    public class Thumbnail extends Sprite{

        private var _loader:Loader

        private var _width:Number

        private var _height:Number

        private var _mainAssetURL:String



        public function get mainAssetURL():String {

            return _mainAssetURL;



        }

        public function Thumbnail (url:String, mainURL:String, defaultWidth:Number, defaultHeight:Number){

            _width = defaultWidth;

            _height = defaultHeight;

            _mainAssetURL = mainURL;

            _loader = new Loader();

            var request:URLRequest = new URLRequest(url);

            _loader.contentLoaderInfo.addEventListener (Event.COMPLETE , goToDefaultState);

            _loader.load(request);

            addChild(_loader)

            _loader.addEventListener(MouseEvent.MOUSE_OVER, goToOverState);

            _loader.addEventListener(MouseEvent.MOUSE_OUT, goToDefaultState)



        }



        private function goToDefaultState (event:Event):void{

            _loader.scaleX = .4;

            _loader.scaleY = .4;

            _loader.filters = [new DropShadowFilter()]



            center();

        }

        private function goToOverState (event:Event):void{



            _loader.scaleX = .6;

            _loader.scaleY = .6;

            _loader.filters = [new DropShadowFilter(10,45,0×222222,1,10,10)]

            center();

        }

        private function center (){

            _loader.x = (_width - _loader.width) / 4;

            _loader.y = (_height - _loader.height) / 4;

        }

    }

}