EncodeUPCorQRCODE

package effects.supportClasses {
	import com.flexcapacitor.effects.supportClasses.ActionEffectInstance;
	import com.google.zxing.BarcodeFormat;
	import com.google.zxing.MultiFormatWriter;
	import com.google.zxing.common.ByteMatrix;
	import com.google.zxing.common.flexdatatypes.HashTable;
	
	import flash.display.BitmapData;
	import flash.events.Event;
	
	import effects.Encode;
	
	/**
	 * @copy Encode
	 * */
	public class EncodeInstance extends ActionEffectInstance {
		
		//--------------------------------------------------------------------------
		//
		//  Constructor
		//
		//--------------------------------------------------------------------------
		
		/**
		 *  Constructor.
		 * */
		public function EncodeInstance(target:Object) {
			super(target);
			
		}
		
		
		//--------------------------------------------------------------------------
		//
		//  Variables
		//
		//--------------------------------------------------------------------------
		
		//--------------------------------------------------------------------------
		//
		//  Properties
		//
		//--------------------------------------------------------------------------
		
		//--------------------------------------------------------------------------
		//
		//  Overridden methods
		//
		//--------------------------------------------------------------------------
		
		/**
		 *  @private
		 * */
		override public function play():void {
			super.play(); // Dispatch an effectStart event
			
			var action:Encode = Encode(effect);
			var multiFormatWriter:MultiFormatWriter;
			var width:int = action.width;
			var height:int = action.height;
			var bitmapData:BitmapData = action.bitmapData;
			var data:String;
			var format:String = action.format;
			var barcodeFormat:BarcodeFormat;
			var result:Object;
			var byteMatrix:ByteMatrix;
			var transparentBackground:Boolean = action.transparent;
			var fillColor:uint = action.fillColor;
			
			///////////////////////////////////////////////////////////
			// Verify we have everything we need before going forward
			///////////////////////////////////////////////////////////
			
			if (validate) {
				if (width<0 || height<0) {
					dispatchErrorEvent("Height and width cannot be set to zero");
				}
			}
			
			
			///////////////////////////////////////////////////////////
			// Continue with action
			///////////////////////////////////////////////////////////
			
			// any images bound to this data throw errors 
			if (bitmapData!=null) {
				//bitmapData.dispose();
				//bitmapData = null;
			}
			
			bitmapData = new BitmapData(width, height, transparentBackground, fillColor);
			
			// get format 
			switch(format) {
				case "QR_CODE": {
					barcodeFormat = BarcodeFormat.QR_CODE;
					break;
				}
				case "DATAMATRIX": {
					barcodeFormat = BarcodeFormat.DATAMATRIX;
					break;
				}
				case "UPC_E": {
					barcodeFormat = BarcodeFormat.UPC_E;
					break;
				}
				case "UPC_A": {
					barcodeFormat = BarcodeFormat.UPC_A;
					break;
				}
				case "EAN_8": {
					barcodeFormat = BarcodeFormat.EAN_8;
					break;
				}
				case "EAN_13": {
					barcodeFormat = BarcodeFormat.EAN_13;
					break;
				}
				case "CODE_128": {
					barcodeFormat = BarcodeFormat.CODE_128;
					break;
				}
				case "ITF": {
					barcodeFormat = BarcodeFormat.ITF;
					break;
				}
				case "PDF417": {
					barcodeFormat = BarcodeFormat.PDF417;
					break;
				}
			}
			
			data = String(action.data);
			multiFormatWriter = new MultiFormatWriter();
			
			// attempt encoding
			try {
				result = multiFormatWriter.encode(data, barcodeFormat, width, height, action.hints as HashTable);
			}
			catch (error:Error) {
				// limit at 2953 ???
				
				action.errorMessage = error.message;
				
				// handle invalid results
				if (hasEventListener(Encode.INVALID)) {
					dispatchEvent(new Event(Encode.INVALID));
				}
				
				if (action.invalidEffect) {
					action.invalidEffect.play();
				}
				
				cancel(error.message);
				
				return;
			}
			
			// QR_CODE, EAN_8
			if (format=="QR_CODE" || format=="EAN_8") {
				byteMatrix = ByteMatrix(result);
				
				// update bitmap data
				for (var h:int=0; h < height; h++) {
					for (var w:int=0; w < width; w++) {
						
						if (byteMatrix._get(w, h) == 0) {
							bitmapData.setPixel(w, h, 0);
						}
						else {
							bitmapData.setPixel(w, h, 0xFFFFFF);
						}
					}
				}
			}
			// says grey scale but the only values seem to be 0 and 255
			else if (format=="EAN_13") {
				byteMatrix = ByteMatrix(result);
				
				// update bitmap data
				for (h=0; h < height; h++) {
					for (w=0; w < width; w++) {
						
						if (byteMatrix._get(w, h) == 0) {
							bitmapData.setPixel(w, h, 0);
						}
						else {
							bitmapData.setPixel(w, h, 0xFFFFFF);
						}
					}
				}
			}
			
			action.bitmapData = null;
			action.bitmapData = bitmapData;
			
			// handle invalid results
			if (hasEventListener(Encode.VALID)) {
				dispatchEvent(new Event(Encode.VALID));
			}
			
			if (action.validEffect) {
				action.validEffect.play();
			}
			
			///////////////////////////////////////////////////////////
			// Finish the effect
			///////////////////////////////////////////////////////////
			
			finish();
			
		}
		
		//--------------------------------------------------------------------------
		//
		//  Event handlers
		//
		//--------------------------------------------------------------------------
		
		
	}
}