org.krysalis.barcode4j.impl.upcean
Class UPCEANCanvasLogicHandler

java.lang.Object
  org.krysalis.barcode4j.impl.upcean.UPCEANCanvasLogicHandler

All Implemented Interfaces:

BarcodeLogicHandler, ClassicBarcodeLogicHandler

public class UPCEANCanvasLogicHandler
extends java.lang.Object
implements ClassicBarcodeLogicHandler

Logic Handler implementation for painting on a Canvas. This is a special implementation for UPC and EAN barcodes.

Version:

$Id: UPCEANCanvasLogicHandler.java,v 1.3 2008/05/13 13:00:44 jmaerki Exp $

Author:

Jeremias Maerki

Constructor Summary

UPCEANCanvasLogicHandler(AbstractBarcodeBean bcBean, Canvas canvas)
Main constructor.

Method Summary

void	addBar(boolean black, int width) This method indicates a new bar to be painted.
void	endBarcode() This is always the last method called.
void	endBarGroup() This method indicates the end of a previously started bar group.
void	startBarcode(java.lang.String msg, java.lang.String formattedMsg) This is always the first method called.
void	startBarGroup(BarGroup type, java.lang.String submsg) This method is called when a new group of bars is about to start.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UPCEANCanvasLogicHandler

public UPCEANCanvasLogicHandler(AbstractBarcodeBean bcBean,
                                Canvas canvas)

Main constructor.

Parameters:

bcBean - the barcode implementation class

canvas - the canvas to paint to

Method Detail

startBarcode

public void startBarcode(java.lang.String msg,
                         java.lang.String formattedMsg)

Description copied from interface: BarcodeLogicHandler

This is always the first method called. It is called to inform the logic handler that a new barcode is about to be painted.

Specified by:

startBarcode in interface BarcodeLogicHandler

Parameters:

msg - full message to be encoded

formattedMsg - message as it is to be presented in the human-readable part

See Also:

ClassicBarcodeLogicHandler

startBarGroup

public void startBarGroup(BarGroup type,
                          java.lang.String submsg)

Description copied from interface: ClassicBarcodeLogicHandler

This method is called when a new group of bars is about to start. A group of bars may be generated by a character (or group of characters) of the message to be encoded or by a start/end control group.

Specified by:

startBarGroup in interface ClassicBarcodeLogicHandler

Parameters:

type - a constant indicating the type of group. The meaning of the integer values is implementation-dependant.

submsg - In case of parts of the message to be encoded this parameter holds the character or characters being encoded.

See Also:

ClassicBarcodeLogicHandler

addBar

public void addBar(boolean black,
                   int width)

Description copied from interface: ClassicBarcodeLogicHandler

This method indicates a new bar to be painted.

Specified by:

addBar in interface ClassicBarcodeLogicHandler

Parameters:

black - True if the bar is to be painted black, False if white/transparent

width - logical weight of the bar. Concrete implementations are free to define this to be height or width. For example, 1 may be interpreted as "narrow bar", 2 as "wide bar" for certain barcodes. While other barcodes might define 1 to be "short bar", 2 as "tall bar". Also, this should not be confused with the effective painting width, or the actual physical size of the bar.

See Also:

ClassicBarcodeLogicHandler

endBarGroup

public void endBarGroup()

Description copied from interface: ClassicBarcodeLogicHandler

This method indicates the end of a previously started bar group. The method calls to startBarGroup and endBarGroup form a stack.

Specified by:

endBarGroup in interface ClassicBarcodeLogicHandler

See Also:

ClassicBarcodeLogicHandler

endBarcode

public void endBarcode()

Description copied from interface: BarcodeLogicHandler

This is always the last method called. It is called to inform the logic handler that the generation of barcode logic has stopped.

Specified by:

endBarcode in interface BarcodeLogicHandler

See Also:

ClassicBarcodeLogicHandler