org.krysalis.barcode4j.impl

Class AbstractVariableHeightLogicHandler

java.lang.Object

org.krysalis.barcode4j.impl.AbstractVariableHeightLogicHandler

All Implemented Interfaces:

BarcodeLogicHandler, ClassicBarcodeLogicHandler

Direct Known Subclasses:

FourStateLogicHandler, POSTNETLogicHandler

public abstract class AbstractVariableHeightLogicHandler
extends Object
implements ClassicBarcodeLogicHandler

Logic Handler to be used by subclasses of HeightVariableBarcodeBean for painting on a Canvas.

Version:

$Id: AbstractVariableHeightLogicHandler.java,v 1.3 2008-05-13 13:00:45 jmaerki Exp $

Author:

Chris Dolphy

Field Summary

Fields

Modifier and Type	Field and Description
protected HeightVariableBarcodeBean	bcBean the barcode bean
protected Canvas	canvas the canvas to paint on
protected double	x the cursor in x-direction
protected double	y the cursor in y-direction

Constructor Summary

Constructors

Constructor and Description
AbstractVariableHeightLogicHandler(HeightVariableBarcodeBean bcBean, Canvas canvas) Constructor

Method Summary

Modifier and Type	Method and Description
void	endBarcode() This is always the last method called.
void	endBarGroup() This method indicates the end of a previously started bar group.
protected double	getTextY() Determines the Y coordinate for the baseline of the human-readable part.
void	setTextAlignment(TextAlignment align) Sets the alignment of the human-readable part.
void	startBarcode(String msg, String formattedMsg) This is always the first method called.
void	startBarGroup(BarGroup barGroup, String string) 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

Methods inherited from interface org.krysalis.barcode4j.ClassicBarcodeLogicHandler

addBar

Field Detail

bcBean

protected HeightVariableBarcodeBean bcBean

the barcode bean

canvas

protected Canvas canvas

the canvas to paint on

x

protected double x

the cursor in x-direction

y

protected double y

the cursor in y-direction

Constructor Detail

AbstractVariableHeightLogicHandler

public AbstractVariableHeightLogicHandler(HeightVariableBarcodeBean bcBean,
                                          Canvas canvas)

Constructor

Parameters:

bcBean - the barcode implementation class

canvas - the canvas to paint to

Method Detail

setTextAlignment

public void setTextAlignment(TextAlignment align)

Sets the alignment of the human-readable part.

Parameters:

align - the new alignment

startBarcode

public void startBarcode(String msg,
                         String formattedMsg)

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

getTextY

protected double getTextY()

Determines the Y coordinate for the baseline of the human-readable part.

Returns:

the adjusted Y coordinate

endBarcode

public void endBarcode()

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

startBarGroup

public void startBarGroup(BarGroup barGroup,
                          String string)

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:

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

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

endBarGroup

public void endBarGroup()

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