8/3/2010 3:11:38 AM

Title: Load image base on the paths in multiple XML files error

---

I wan to write AS3 program that load image base on the paths in multi XML files (user choose which xml file they want by button), the first time it worked properly but in 2nd, 3rd... time, it have an error:

TypeError: Error #1010: A term is undefined and has no properties.
	at Main/processXML()
	at flash.events::EventDispatcher/dispatchEventFunction()
	at flash.events::EventDispatcher/dispatchEvent()
	at flash.net::URLLoader/onComplete()

Here is my Main class:

package  
{
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Loader;
    import flash.display.MovieClip;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.net.navigateToURL;
    import flash.external.ExternalInterface;
    /**
     * ...
     * @author Tuan
     */
    public class Main extends MovieClip
    {
        //Declare member variables here
        var urlLoader:URLLoader;
        var xml:XML;
        var xmlPath:URLRequest;
        var imgPath:URLRequest;
        var x_counter:Number = 0;
        var y_Counter:Number = 0;
        var initX:Number = 180;
        var initY:Number = 250;
        var thumbnail_Width:Number = 200;
        var thumbnail_Height:Number = 150;
        var spaceW:Number = 10;
        var spaceH:Number = 12;
        var offset:int = 0;
        var swfLoader:Loader;
        var totalGame:int = 0;
        var currentPage:int = 0;
        var totalPage:int;
        
        //Constructor here
        public function Main() 
        {
            //Load xml file
            loadXML();
            
            btnSearch.addEventListener(MouseEvent.CLICK, searchClick);
            next.buttonMode = true;
            prev.buttonMode = true;
            btnSearch.buttonMode = true;
            
            //add event listener for next and previous button
            next.addEventListener(MouseEvent.CLICK, nextClick);
            prev.addEventListener(MouseEvent.CLICK, prevClick);
        }
        
        //Load xml file
        public function loadXML()
        {            
            switch(currentPage)
            {
                case 1:
                        xmlPath = new URLRequest("Demo1.xml");
                    break;
                case 2:
                        xmlPath = new URLRequest("Demo2.xml");
                    break;
                case 3:
                        xmlPath = new URLRequest("Demo3.xml");
                    break;
                default:
                        xmlPath = new URLRequest("Demo1.xml");
                    break;
            }
            urlLoader = new URLLoader();
            urlLoader.load(xmlPath);    
            urlLoader.addEventListener(Event.COMPLETE, processXML);
        }
        
        //Process loaded xml file
        public function processXML(e:Event):void
        {
            xml = XML(urlLoader.data);            
            currentPage = xml.@page;
            totalGame = xml.@total;
            totalPage = Math.ceil(totalGame / 9);
            
            //paging file paths                
            paging();
            if (xml != null)
            {
                loadThumb(xml.game[offset].@thumb);
                trace("xml not null " + xml.game[0].@id);
            }
            else
            {
                trace("xml is null");
            }
        }
        
        //Load thumbnails here
        public function loadThumb(path:String)    
        {
            var loader:Loader = new Loader();
            
            //loader.name = path;
            imgPath = new URLRequest(path);
            loader.contentLoaderInfo.addEventListener(Event.COMPLETE, thumbLoaded);
            loader.load(imgPath);
            
        }
        
        //Process loaded thumbnails here
        public function thumbLoaded(e:Event):void
        {    
            trace("==========xml=========" + xml.game[0].@id);
            
            var my_thumb:Loader = Loader(e.target.loader);
            var container:mcContainer = new mcContainer();
            addChild(container);
            container.addChild(my_thumb);
            container.x = (thumbnail_Width + spaceW) * x_counter + initX;
            container.y = (thumbnail_Height +spaceH) * y_Counter + initY;
            container.buttonMode = true;
            container.addEventListener(MouseEvent.CLICK, containerClick);
            
            if (x_counter + 1 < 3)
            {
                x_counter++;
            }
            
            else 
            {
                x_counter = 0;
                y_Counter++;
            }
            
            container.name = "container" + offset;
            
            offset++;
            trace(xml.game.length());
            container.txtID.text = xml.game[offset - 1].@id;
            
            if (offset < xml.game.length())
            {
                loadThumb(xml.game[offset].@thumb);
            }
        }
        
        //The event occured when user click the search button
        public function searchClick(e:MouseEvent):void
        {
            //push query to server
        }
        
        //Container click event
        public function containerClick(e:Event):void
        {
            var myContainer:mcContainer = e.currentTarget as mcContainer;
            navigateToURL(new URLRequest(myContainer.txtID.text), "_self");
        }
        
        //paging
        public function paging():void
        {
            if (xml != null)
            {            
                txtPaging.text = "Trang " + currentPage + "/" + totalPage;
                
                if (currentPage == 1)
                {
                    prev.visible = false;
                }
                else if(currentPage > 1 && currentPage < totalPage)
                {
                    prev.visible = true;
                    next.visible = true;
                }
                
                else
                {
                    next.visible = false;
                }
                //trace(xml);
            }
        }
        
        //next button click
        public function nextClick(e:Event):void
        {
            if (currentPage < totalPage)
            {
                currentPage++;
                removeContainer();
                loadXML();
                
            }
            trace("=======currentPage=======" + currentPage);
        }
        
        //previous button click
        public function prevClick(e:Event):void
        {
            if (currentPage > 1)
            {
                currentPage--;
                removeContainer();
                loadXML();
            }
            
        }
        
        public function removeContainer():void
        {
            for (var i:int = 0; i < xml.game.length(); i++)
            {
                var myContainer:mcContainer = this.getChildByName("container" + i) as mcContainer;
                if (myContainer != null)
                {
                    myContainer.removeEventListener(MouseEvent.CLICK, containerClick);
                    removeChild(myContainer);
                    myContainer = null;
                }
            }
        }
    }
}

8/3/2010 3:13:41 AM

8/3/2010 9:52:46 AM

Type your Reply or Answer