ActionScript 3 AS3二维码生成器
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了ActionScript 3 AS3二维码生成器相关的知识，希望对你有一定的参考价值。
// Useful Resources
//
// http://active.tutsplus.com/tutorials/actionscript/quick-tip-using-a-php-proxy-to-load-assets-into-flash/
// http://blog.juanbonfante.com/?p=272
// http://alivepdf.bytearray.org/
// http://blog.unthinkmedia.com/2008/09/05/exporting-pdfs-in-flex-using-alivepdf/
// http://lucamezzalira.com/2009/02/28/create-pdf-in-runtime-with-actionscript-3-alivepdf-zinc-or-air-flex-or-flash/
package
{
import flash.display.Loader;
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.Event;
import flash.display.Shape;
import flash.events.HTTPStatusEvent;
import flash.events.IOErrorEvent;
import flash.events.TextEvent;
import flash.geom.Rectangle;
import flash.net.URLRequest;
import flash.display.Bitmap;
import flash.net.URLVariables;
import flash.text.TextFormat;
import flash.text.TextField;
import flash.text.TextFormatAlign;
import flash.text.TextFieldAutoSize;
import flash.net.navigateToURL;
import flash.system.LoaderContext;
import flash.system.Security;
import flash.display.BitmapData;
import flash.utils.ByteArray;
import flash.net.URLRequestHeader;
import flash.net.URLRequestMethod;
import flash.printing.PrintJob;
import flash.net.FileReference;
// http://www.minimalcomps.com
import com.bit101.components.Text;
import com.bit101.components.HUISlider;
import com.bit101.components.PushButton;
import com.bit101.components.Label;
// https://github.com/mikechambers/as3corelib
import com.adobe.images.JPGEncoder;
import com.adobe.images.PNGEncoder;
// http://alivepdf.bytearray.org/
import org.alivepdf.pdf.PDF;
import org.alivepdf.layout.Orientation;
import org.alivepdf.layout.Size;
import org.alivepdf.layout.Unit;
import org.alivepdf.display.Display;
import org.alivepdf.saving.Method;
import org.alivepdf.layout.Resize;
import org.alivepdf.layout.Mode;
import org.alivepdf.layout.Position;
[SWF(width = '500', height = '500', backgroundColor = '#FFFFFF', frameRate = '25')]
/**
* ...
* @author Adrian Parr
*/
public class Main extends Sprite
{
[Embed(source="../assets/title.png")]
private var TitleGraphic:Class;
[Embed(source="../assets/loading_anim.swf")]
private var LoadingAnim:Class;
private static const _serversideProxyUrl:String = "proxy.php";
private static const _googleUrl:String = "http://chart.apis.google.com/chart";
private static const _imageFilename:String = "qr_code";
private static const _createPngFilePhpUrl:String = "png_encoder_download.php";
private static const _createJpegFilePhpUrl:String = "jpg_encoder_download.php";
private static const _pdfFilename:String = "qr_code.pdf";
private static const _printA4width:int = 580;
private static const _printA4height:int = 830;
private static const _pdfA4width:int = 540;
private static const _pdfA4height:int = 790;
private var _loadingAnim:MovieClip;
private var _border:Shape;
private var _borderColour:uint = 0x036CB4;
private var _borderWidth:uint = 1;
private var _borderAlpha:Number = 1;
private var _controlsHeight:int = 100;
private var _controls:Sprite;
private var _qrLoader:Loader;
private var _urlVars:URLVariables;
private var _urlRequest:URLRequest;
private var _url:String = "";
private var _size:int;
private var _urlText:Text;
private var _dimensionsSlider:HUISlider;
private var _generateBtn:PushButton;
private var _savePngBtn:PushButton;
private var _saveJpegBtn:PushButton;
private var _printBtn:PushButton;
private var _pdfBtn:PushButton;
private var _defaultSize:int = 200;
private var _qrCodeBitmapData:BitmapData;
private var _errorTxt:TextField = new TextField();
private var _printTemplate:Sprite;
public function Main():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
var bgRect:Shape = new Shape();
bgRect.graphics.beginFill(0xCCCCCC, 1);
bgRect.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
bgRect.graphics.endFill();
addChild(bgRect);
createControls();
_border = new Shape();
_border = drawBorder(_borderColour, _borderWidth, _borderAlpha);
addChild(_border);
_qrLoader = new Loader();
_qrLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onQrLoader_COMPLETE);
_qrLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, onQrLoader_IO_ERROR);
_qrLoader.contentLoaderInfo.addEventListener(HTTPStatusEvent.HTTP_STATUS, onQrLoader_HTTP_STATUS);
_loadingAnim = new LoadingAnim();
_loadingAnim.visible = false;
_loadingAnim.alpha = 0.7;
_loadingAnim.x = stage.stageWidth / 2 - _loadingAnim.width / 2;
_loadingAnim.y = ((stage.stageHeight-_controlsHeight) / 2) - (_loadingAnim.height / 2) + _controlsHeight;
addChild(_loadingAnim);
_printTemplate = new Sprite();
_printTemplate.graphics.beginFill(0xFFFFFF, 1);
_printTemplate.graphics.drawRect(0, 0, _printA4width, _printA4height);
_printTemplate.graphics.endFill();
}
private function createControls():void
{
_controls = new Sprite();
var bg:Shape = new Shape();
bg.graphics.beginFill(0x000000, 0.1);
bg.graphics.drawRect(0, 0, stage.stageWidth, _controlsHeight);
bg.graphics.endFill();
_controls.addChild(bg);
var title:Bitmap = new TitleGraphic();
title.x = 10;
title.y = 10;
_controls.addChild(title);
var urlLabel:Label = new Label(_controls, 13, 29, "Message/URL");
_urlText = new Text(_controls, 80, 28, "");
_urlText.addEventListener(Event.CHANGE, onUrlText_CHANGE);
_urlText.textField.multiline = false;
_urlText.width = 375;
_urlText.height = 20;
_dimensionsSlider = new HUISlider(_controls, 10, 50, "Size (in pixels)", onDimensionsSlider);
_dimensionsSlider.width = 500;
_dimensionsSlider.minimum = 50;
_dimensionsSlider.maximum = stage.stageHeight - _controlsHeight;
_dimensionsSlider.value = _defaultSize;
_dimensionsSlider.labelPrecision = 0;
_generateBtn = new PushButton(_controls, 80, 69, "Generate", onGenerateBtn);
_generateBtn.width = 71;
_generateBtn.enabled = false;
_savePngBtn = new PushButton(_controls, 156, 69, "Save as PNG", onSavePngBtn);
_savePngBtn.width = 71;
_savePngBtn.enabled = false;
_saveJpegBtn = new PushButton(_controls, 232, 69, "Save as JPEG", onSaveJpegBtn);
_saveJpegBtn.width = 71;
_saveJpegBtn.enabled = false;
_printBtn = new PushButton(_controls, 308, 69, "Print A4", onPrintBtn);
_printBtn.width = 71;
_printBtn.enabled = false;
_pdfBtn = new PushButton(_controls, 384, 69, "Create PDF", onPdfBtn);
_pdfBtn.width = 71;
_pdfBtn.enabled = false;
addChild(_controls);
}
private function onDimensionsSlider(event:Event):void
{
if (_url.length > 0) {
_generateBtn.enabled = true;
} else {
_generateBtn.enabled = false;
}
_savePngBtn.enabled = false;
_saveJpegBtn.enabled = false;
_printBtn.enabled = false;
_pdfBtn.enabled = false;
_qrLoader.visible = false;
}
private function onUrlText_CHANGE(event:Event):void
{
//trace("onUrlText()");
_url = _urlText.text;
//trace("_url:", _url);
if (_url.length > 0) {
_generateBtn.enabled = true;
} else {
_generateBtn.enabled = false;
}
_savePngBtn.enabled = false;
_saveJpegBtn.enabled = false;
_printBtn.enabled = false;
_pdfBtn.enabled = false;
_qrLoader.visible = false;
}
private function onGenerateBtn(event:Event):void
{
trace("onGenerateBtn()");
_generateBtn.enabled = false;
_qrLoader.visible = false;
_loadingAnim.visible = true;
_url = _urlText.text;
_size = _dimensionsSlider.value;
_errorTxt.visible = false;
_urlVars = new URLVariables();
_urlRequest = new URLRequest();
_urlVars.chs = String(_size + "x" + _size);
if (Security.sandboxType == Security.LOCAL_TRUSTED) {
// If 'LOCAL_TRUSTED' then load the image from Google directly.
trace("Security.sandboxType == Security.LOCAL_TRUSTED");
_urlVars.cht = "qr";
_urlVars.chl = _url;
_urlRequest.url = _googleUrl;
} else {
// Else, circumvent using a server-side proxy script
trace("Security.sandboxType != Security.LOCAL_TRUSTED");
_urlVars.chl = encodeURIComponent(_url);
_urlVars.googleUrl = _googleUrl;
_urlRequest.url = _serversideProxyUrl;
}
_urlRequest.data = _urlVars;
trace("vars.toString():" + _urlVars.toString());
trace("_urlRequest: ", _urlRequest.url);
_savePngBtn.enabled = false;
_saveJpegBtn.enabled = false;
_printBtn.enabled = false;
_pdfBtn.enabled = false;
var loaderContext:LoaderContext = new LoaderContext ();
loaderContext.checkPolicyFile = true;
_qrLoader.load(_urlRequest, loaderContext);
}
private function onSavePngBtn(event:Event):void
{
trace("onSavePngBtn()");
var qrCodeBitmap:Bitmap = Bitmap(_qrLoader.content);
_qrCodeBitmapData = qrCodeBitmap.bitmapData;
//var pngEncoder:PNGEncoder = new PNGEncoder(90);
var imageByteArray:ByteArray = PNGEncoder.encode(_qrCodeBitmapData);
var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
var pngURLRequest:URLRequest = new URLRequest(_createPngFilePhpUrl+"?name="+_imageFilename+".png");
pngURLRequest.requestHeaders.push(header);
pngURLRequest.method = URLRequestMethod.POST;
pngURLRequest.data = imageByteArray;
navigateToURL(pngURLRequest, "_blank");
}
private function onSaveJpegBtn(event:Event):void
{
trace("onSaveJpegBtn()");
//navigateToURL(_urlRequest, "_blank");
var qrCodeBitmap:Bitmap = Bitmap(_qrLoader.content);
_qrCodeBitmapData = qrCodeBitmap.bitmapData;
var jpgEncoder:JPGEncoder = new JPGEncoder(90);
var imageByteArray:ByteArray = jpgEncoder.encode(_qrCodeBitmapData);
var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
var jpgURLRequest:URLRequest = new URLRequest(_createJpegFilePhpUrl+"?name="+_imageFilename+".jpg");
jpgURLRequest.requestHeaders.push(header);
jpgURLRequest.method = URLRequestMethod.POST;
jpgURLRequest.data = imageByteArray;
navigateToURL(jpgURLRequest, "_blank");
}
private function onPrintBtn(event:Event):void
{
trace("onPrintBtn()");
var pj:PrintJob = new PrintJob();
if (pj.start()) {
try {
var tempBitmapData:BitmapData = new BitmapData( _size, _size);
tempBitmapData.draw(_qrLoader);
var qrCodeBitmap:Bitmap = new Bitmap(tempBitmapData);
var qrCodeSprite:Sprite = new Sprite();
qrCodeSprite.addChild(qrCodeBitmap);
var scale:Number = _printTemplate.width / _size;
qrCodeSprite.scaleX = qrCodeSprite.scaleY = scale;
qrCodeSprite.y = (_printTemplate.height / 2) - (qrCodeSprite.height / 2);
_printTemplate.addChild(qrCodeSprite);
pj.addPage(_printTemplate);
}
catch(error:Error) {
trace("There was an error with the PrintJob");
}
pj.send();
} else {
trace("PrintJob was cancelled");
}
}
private function onPdfBtn(event:Event):void
{
trace("onPdfBtn()");
var myPDF:PDF = new PDF(Orientation.PORTRAIT, Unit.MM, Size.A4);
myPDF.setDisplayMode(Display.FULL_WIDTH);
myPDF.addPage();
var pdfSheet:Sprite = new Sprite();
pdfSheet.graphics.beginFill(0xFFFFFF, 1);
pdfSheet.graphics.drawRect(0, 0, _pdfA4width, _pdfA4height);
pdfSheet.graphics.endFill();
var tempBitmapData:BitmapData = new BitmapData( _size, _size);
tempBitmapData.draw(_qrLoader);
var qrCodeBitmap:Bitmap = new Bitmap(tempBitmapData);
var qrCodeSprite:Sprite = new Sprite();
qrCodeSprite.addChild(qrCodeBitmap);
var scale:Number = pdfSheet.width / _size;
qrCodeSprite.scaleX = qrCodeSprite.scaleY = scale;
qrCodeSprite.y = (pdfSheet.height / 2) - (qrCodeSprite.height / 2);
pdfSheet.addChild(qrCodeSprite);
myPDF.addImage(pdfSheet);
var fileReference:FileReference = new FileReference();
var byteArray:ByteArray = myPDF.save(Method.LOCAL);
fileReference.save(byteArray, _pdfFilename);
fileReference.addEventListener(IOErrorEvent.IO_ERROR, onFileReference_IO_ERROR);
}
private function onFileReference_IO_ERROR(event:IOErrorEvent):void
{
trace("onFileReference_IO_ERROR()");
}
private function onQrLoader_COMPLETE(event:Event):void {
_loadingAnim.visible = false;
_qrLoader.x = stage.stageWidth / 2 - _qrLoader.width / 2;
_qrLoader.y = ((stage.stageHeight-_controlsHeight) / 2) - (_qrLoader.height / 2) + _controlsHeight;
_qrLoader.visible = true;
addChild(_qrLoader);
addChild(_border);
_savePngBtn.enabled = true;
_saveJpegBtn.enabled = true;
_printBtn.enabled = true;
_pdfBtn.enabled = true;
// NOTE: This will fail online because Google Charts
// doesn't have a crossdomain.xml file.
// To get around this issue we are using a serverside proxy script using PHP.
var bmp:Bitmap = _qrLoader.content as Bitmap ;
bmp.smoothing = true ;
}
private function onQrLoader_IO_ERROR(event:IOErrorEvent):void
{
trace("onQrLoader_IO_ERROR()");
trace("event: " + event);
_loadingAnim.visible = false;
var errorMsg:String = "The was an error loading the following url:\n" + _urlRequest.url + "?" + _urlVars.toString();
displayTextInMiddleOfScreen(errorMsg);
}
private function onQrLoader_HTTP_STATUS(event:HTTPStatusEvent):void
{
trace("onQrLoader_HTTP_STATUS()");
trace("event: " + event);
trace("event.status: " + event.status);
}
private function drawBorder($borderColour:uint = 0x0000, $borderWidth:uint = 1, $borderAlpha:Number = 1):Shape
{
var border:Shape = new Shape();
border.graphics.beginFill($borderColour, $borderAlpha);
border.graphics.drawRect($borderWidth, 0, stage.stageWidth-$borderWidth, $borderWidth);
border.graphics.endFill();
border.graphics.beginFill($borderColour, $borderAlpha);
border.graphics.drawRect(stage.stageWidth-$borderWidth, $borderWidth, $borderWidth, stage.stageHeight-$borderWidth);
border.graphics.endFill();
border.graphics.beginFill($borderColour, $borderAlpha);
border.graphics.drawRect(0, stage.stageHeight-$borderWidth, stage.stageWidth-$borderWidth, $borderWidth);
border.graphics.endFill();
border.graphics.beginFill($borderColour, $borderAlpha);
border.graphics.drawRect(0, 0, $borderWidth, stage.stageHeight-$borderWidth);
border.graphics.endFill();
return border;
}
private function displayTextInMiddleOfScreen($msg:String):void
{
var tf:TextFormat = new TextFormat();
tf.align = TextFormatAlign.CENTER;
tf.size = 10;
tf.bold = true;
tf.font = "_sans";
tf.color = 0x666666;
_errorTxt.text = $msg;
_errorTxt.border = true;
_errorTxt.width = 400;
_errorTxt.wordWrap = true;
_errorTxt.autoSize = TextFieldAutoSize.CENTER;
_errorTxt.setTextFormat(tf);
_errorTxt.x = (stage.stageWidth / 2) - (_errorTxt.width / 2);
_errorTxt.y = ((stage.stageHeight-_controlsHeight) / 2) - (_errorTxt.height / 2) + _controlsHeight - 10;
_errorTxt.visible = true;
addChild(_errorTxt);
}
}
}以上是关于ActionScript 3 AS3二维码生成器的主要内容，如果未能解决你的问题，请参考以下文章
ActionScript 3 AS3：在ActionScript中使用E4X生成动态XML
ActionScript 3 Lynda.com - AS3 - 使用循环生成类的实例
[ActionScript 3.0] AS3.0 生成xml方法之一