Pequeños cambios en una galeria (actionscript 3.0)

// Copyright © flashmo.com
// Developed by Min Thu

// Tweener
// http://code.google.com/p/tweener/
import caurina.transitions.*;

var folder:String = "photos/";
var i:Number;
var tn:Number = 0;
var current_no:Number = 0;
var no_of_column:Number = 1;
var tween_duration:Number = 0.7;
var total:Number;
var flashmo_xml:XML;
var flashmo_photo_list = new Array();
var flashmo_pic:MovieClip = new MovieClip();
var thumbnail_group:MovieClip = new MovieClip();

this.addChild(flashmo_pic);
this.addChild(thumbnail_group);

flashmo_pic.x = flashmo_photo_area.x;
flashmo_pic.y = flashmo_photo_area.y;
flashmo_pic.mask = flashmo_photo_area;

thumbnail_group.x = flashmo_thumbnail_area.x;
thumbnail_group.y = flashmo_thumbnail_area.y;
thumbnail_group.mask = flashmo_thumbnail_area;

flashmo_scrollbar.visible = false;
thumbnail_info.text = "";
loading_info.text = "";
photo_title.text = "";
photo_description.text = "";

function load_gallery(xml_file:String):void
{
var xml_loader:URLLoader = new URLLoader();
xml_loader.load( new URLRequest( xml_file ) );
xml_loader.addEventListener(Event.COMPLETE, create_thumbnail);
}

function create_thumbnail(e:Event):void
{
flashmo_xml = new XML(e.target.data);
total = flashmo_xml.photo.length();
for( i = 0; i < total; i++ )
{
flashmo_photo_list.push( {
thumbnail: flashmo_xml.photo[i].thumbnail.toString(),
filename: flashmo_xml.photo[i].filename.toString(),
title: flashmo_xml.photo[i].title.toString(),
description: flashmo_xml.photo[i].description.toString()
} );
}
load_photo();
load_tn();
}

function load_photo():void
{
var pic_request:URLRequest = new URLRequest( folder + flashmo_photo_list[current_no].filename );
var pic_loader:Loader = new Loader();
pic_loader.load(pic_request);
pic_loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, on_photo_progress);
pic_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, on_photo_loaded);

photo_title.text = flashmo_photo_list[current_no].title;
photo_description.text = flashmo_photo_list[current_no].description;
flashmo_pic.alpha = 0;
}

function on_photo_progress(e:ProgressEvent):void
{
var percent:Number = Math.round(e.bytesLoaded / e.bytesTotal * 100);
loading_info.text = "Loading... " + percent + "%";
}

function on_photo_loaded(e:Event):void
{
loading_info.text = "";
flashmo_pic.addChild( Bitmap(e.target.content) );
Tweener.addTween( flashmo_pic, { alpha: 1, time: tween_duration, transition: "linear" } );
}

function load_tn():void
{
var pic_request:URLRequest = new URLRequest( folder + flashmo_photo_list[tn].thumbnail );
var pic_loader:Loader = new Loader();
pic_loader.load(pic_request);
pic_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, on_thumbnail_loaded);
tn++;
thumbnail_info.text = "loading thumbnail " + tn + " of " + total;
}

function on_thumbnail_loaded(e:Event):void
{
if( tn < total )
{
load_tn();
}
else
{
flashmo_scrollbar.visible = true;
flashmo_scrollbar.scrolling("thumbnail_group", "flashmo_thumbnail_area", 0.25);
thumbnail_info.text = "";
}

var flashmo_bm:Bitmap = new Bitmap();
var flashmo_mc:MovieClip = new MovieClip();

flashmo_bm = Bitmap(e.target.content);
flashmo_bm.smoothing = true;

var bg_width:Number = flashmo_bm.width + 10;
var bg_height:Number = flashmo_bm.height + 10;

flashmo_mc.addChild(flashmo_bm);
flashmo_mc.name = "flashmo_" + thumbnail_group.numChildren;
flashmo_mc.buttonMode = true;
flashmo_mc.addEventListener( MouseEvent.MOUSE_OVER, tn_over );
flashmo_mc.addEventListener( MouseEvent.MOUSE_OUT, tn_out );
flashmo_mc.addEventListener( MouseEvent.CLICK, tn_click );
flashmo_mc.x = thumbnail_group.numChildren % no_of_column * bg_width;
flashmo_mc.y = Math.floor( thumbnail_group.numChildren / no_of_column ) * bg_height;

thumbnail_group.addChild(flashmo_mc);
}

function tn_over(e:MouseEvent):void
{
var mc:MovieClip = MovieClip(e.target);
var s_no:Number = parseInt(mc.name.slice(8,10));
Tweener.addTween( mc, { alpha: 0.5, time: tween_duration, transition: "easeOut" } );
}

function tn_out(e:MouseEvent):void
{
var mc:MovieClip = MovieClip(e.target);
Tweener.addTween( mc, { alpha: 1, time: tween_duration, transition: "easeIn" } );
}

function tn_click(e:MouseEvent):void
{
var mc:MovieClip = MovieClip(e.target);
var s_no:Number = parseInt(mc.name.slice(8,10));
current_no = s_no;
Tweener.addTween( flashmo_pic, { alpha: 0, time: tween_duration,
transition: "linear", onComplete: unload_photo } );

}

function unload_photo():void
{
flashmo_pic.removeChildAt(0);
load_photo();
}