org.krysalis.barcode4j.impl
Class DefaultTwoDimCanvasLogicHandler

java.lang.Object
  org.krysalis.barcode4j.impl.DefaultTwoDimCanvasLogicHandler

All Implemented Interfaces:

BarcodeLogicHandler, ClassicBarcodeLogicHandler, TwoDimBarcodeLogicHandler

public class DefaultTwoDimCanvasLogicHandler
extends java.lang.Object
implements TwoDimBarcodeLogicHandler

Default 2D Logic Handler implementation for painting on a Canvas.

Version:

$Id: DefaultTwoDimCanvasLogicHandler.java,v 1.1 2006/06/22 09:01:19 jmaerki Exp $

Author:

Jeremias Maerki

Constructor Summary

DefaultTwoDimCanvasLogicHandler(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	endRow() Signals the end of a row in the barcode.
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.
void	startRow() Signals the start of a new row in the barcode.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultTwoDimCanvasLogicHandler

public DefaultTwoDimCanvasLogicHandler(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

startRow

public void startRow()

Description copied from interface: TwoDimBarcodeLogicHandler

Signals the start of a new row in the barcode.

Specified by:

startRow in interface TwoDimBarcodeLogicHandler

See Also:

TwoDimBarcodeLogicHandler.startRow()

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

endRow

public void endRow()

Description copied from interface: TwoDimBarcodeLogicHandler

Signals the end of a row in the barcode.

Specified by:

endRow in interface TwoDimBarcodeLogicHandler

See Also:

TwoDimBarcodeLogicHandler.endRow()

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