Resizing at runtime bitmap led to empty graph

Hi all

I'm having the darndest time to find how to create thumbnails dynamically during execution. Here is the code I have:

<?xml version="1.0" encoding="utf-8"?>


<mx:Module

 xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="

library://ns.adobe.com/flex/spark" xmlns:mx="

library://ns.adobe.com/flex/mx"width="

100%" height="

100%"
layout="
vertical">

<fx:Declarations>

</fx:Declarations>

<fx:Script>
<![CDATA[

import flash.sampler.NewObjectSample;


import flashx.textLayout.events.SelectionEvent;


import mx.collections.ArrayCollection;

import mx.controls.Image;

import mx.controls.ProgressBarMode;

import mx.core.IUIComponent;

import mx.events.DragEvent;

import mx.events.ItemClickEvent;

import mx.graphics.codec.PNGEncoder;

import mx.managers.DragManager;

import mx.modules.ModuleLoader;

import mx.utils.Base64Decoder;

import mx.utils.Base64Encoder;


import spark.components.Window;

import spark.events.IndexChangeEvent;

import spark.primitives.Rect;



private var _fileReference:FileReference;

private var _fileTypeFilter:FileFilter;

private var _fileLoader:Loader;




protected function btn_files_clickHandler(event:MouseEvent):void{

this._fileReference = new FileReference();

this._fileTypeFilter = new FileFilter("Typical Genealogy Source Files", "*.pdf;*.doc;*.jpg;*.jpeg;*.png;*.gif");

this._fileReference.addEventListener(Event.SELECT, fileSelectHandler);

this._fileReference.addEventListener(ProgressEvent.PROGRESS, loadingHandler);

this._fileReference.addEventListener(Event.COMPLETE, loadPictureHandler);

this._fileReference.browse([this._fileTypeFilter]); }



private function fileSelectHandler(event:Event):void{

this._fileReference.load();}



private function loadingHandler(event:ProgressEvent):void{

this.prb_fileUplaods.setProgress(event.bytesLoaded / event.bytesTotal * 100, 100);

trace((event.bytesLoaded / event.bytesTotal * 100).toString() + " precent loaded.");}



private function loadPictureHandler(event:Event):void{

this._fileLoader = new Loader();

this._fileLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, pictureLoadedHandler) ;

this._fileLoader.loadBytes(this._fileReference.data) ;}



private function pictureLoadedHandler(event:Event):void{

var original:BitmapData;

var bmd:BitmapData = Bitmap(event.target.content).bitmapData;

var originalWidth:Number = Bitmap(event.target.content).loaderInfo.width;

var originalHeight:Number = Bitmap(event.target.content).loaderInfo.height;

var m:Matrix = new Matrix();
m.scale(100/originalWidth, originalHeight/100);
original = 

new BitmapData(100, 100); original.draw(bmd, m);


this.img_test.source = bmd.getPixels(bmd.rect);
}


]]>


</fx:Script>


<mx:ProgressBar id="prb_fileUplaods" labelPlacement="center" height="20" mode="{ProgressBarMode.MANUAL}" />

<s:Button label="Choose File(s) ..." id="btn_files" height="20" click="btn_files_clickHandler(event)" />


<mx:Image id="img_test" />
</mx:Module>

</mx:Modu<

No idea what I am doing wrong?

Thank you very much for all the help, I was challenging my brain with this wall of brick for the last two weeks!

~ Mike

Hello

the following works, note that if you upload an image, you must convert the bitmapdata to an image format (I did it for you) you just need to add the download to.

David.

http://ns.Adobe.com/MXML/2009"xmlns:s ="library://ns.adobe.com/flex/spark ".

xmlns:MX = "library://ns.adobe.com/flex/mx" >

Import mx.controls.ProgressBarMode;

Import mx.graphics.codec.JPEGEncoder;

private var fi: FileReference = new FileReference();

private var ff: FileFilter = new FileFilter ("images", "*.jpg; *.gif; *.png");

private var fl:Loader = new Loader();

protected function btn_files_clickHandler(event:MouseEvent):void

{

fi.addEventListener (Event.SELECT, fileSelectHandler);

fi.addEventListener (Event.COMPLETE, loadPictureHandler);

fl.contentLoaderInfo.addEventListener (Event.COMPLETE, onComplete);

fi. Browse ([FF]);

}

private void onComplete(event:Event):void

{

var originalWidth:Number = event.currentTarget.content.loaderInfo.width;

var originalHeight:Number = event.currentTarget.content.loaderInfo.height;

var m:Matrix new matrix());

var scale: Number = originalWidth/100;

m.Scale (scale, scale);

var newBmD:BitmapData = new BitmapData(100,originalHeight*scale);

newBmD.draw (event.currentTarget.content.bitmapData, m);

var ba: ByteArray = new ByteArray();

var Encoder: JPEGEncoder = new JPEGEncoder (100);

BA = encode. Encode (newBmD);

img_test1.source = ba;

}

private void fileSelectHandler(event:Event):void

{

fi. Load();

}

private void loadPictureHandler(event:Event):void

{

img_test4.source = fi.data;

fl.loadBytes (fi.data);

}

]]>

Tags: Flex

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