com.lowagie.text.pdf

Class Barcode39

public class Barcode39 extends Barcode

Implements the code 39 and code 39 extended. The default parameters are:
x = 0.8f;
n = 2;
font = BaseFont.createFont("Helvetica", "winansi", false);
size = 8;
baseline = size;
barHeight = size * 3;
textAlignment = Element.ALIGN_CENTER;
generateChecksum = false;
checksumText = false;
startStopText = true;
extended = false;
 

Author: Paulo Soares (psoares@consiste.pt)

Field Summary
static byte[][]BARS
The bars to generate the code.
static StringCHARS
The index chars to BARS.
static StringEXTENDED
The character combinations to make the code 39 extended.
Constructor Summary
Barcode39()
Creates a new Barcode39.
Method Summary
ImagecreateAwtImage(Color foreground, Color background)
Creates a java.awt.Image.
RectanglegetBarcodeSize()
Gets the maximum area that the barcode and the text, if any, will occupy.
static byte[]getBarsCode39(String text)
Creates the bars.
static chargetChecksum(String text)
Calculates the checksum.
static StringgetCode39Ex(String text)
Converts the extended text into a normal, escaped text, ready to generate bars.
RectangleplaceBarcode(PdfContentByte cb, Color barColor, Color textColor)
Places the barcode in a PdfContentByte.

Field Detail

BARS

private static final byte[][] BARS
The bars to generate the code.

CHARS

private static final String CHARS
The index chars to BARS.

EXTENDED

private static final String EXTENDED
The character combinations to make the code 39 extended.

Constructor Detail

Barcode39

public Barcode39()
Creates a new Barcode39.

Method Detail

createAwtImage

public Image createAwtImage(Color foreground, Color background)
Creates a java.awt.Image. This image only contains the bars without any text.

Parameters: foreground the color of the bars background the color of the background

Returns: the image

getBarcodeSize

public Rectangle getBarcodeSize()
Gets the maximum area that the barcode and the text, if any, will occupy. The lower left corner is always (0, 0).

Returns: the size the barcode occupies.

getBarsCode39

public static byte[] getBarsCode39(String text)
Creates the bars.

Parameters: text the text to create the bars. This text does not include the start and stop characters

Returns: the bars

getChecksum

static char getChecksum(String text)
Calculates the checksum.

Parameters: text the text

Returns: the checksum

getCode39Ex

public static String getCode39Ex(String text)
Converts the extended text into a normal, escaped text, ready to generate bars.

Parameters: text the extended text

Returns: the escaped text

placeBarcode

public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor)
Places the barcode in a PdfContentByte. The barcode is always placed at coordinates (0, 0). Use the translation matrix to move it elsewhere.

The bars and text are written in the following colors:

barColor

textColor

Result

null

null

bars and text painted with current fill color

barColor

null

bars and text painted with barColor

null

textColor

bars painted with current color
text painted with textColor

barColor

textColor

bars painted with barColor
text painted with textColor

Parameters: cb the PdfContentByte where the barcode will be placed barColor the color of the bars. It can be null textColor the color of the text. It can be null

Returns: the dimensions the barcode occupies