org.krysalis.barcode4j.output.java2d

Class Java2DCanvasProvider

java.lang.Object

org.krysalis.barcode4j.output.AbstractCanvasProvider

org.krysalis.barcode4j.output.java2d.Java2DCanvasProvider

All Implemented Interfaces:

CanvasProvider

public class Java2DCanvasProvider
extends AbstractCanvasProvider

CanvasProvider implementation that renders to Java2D (AWT).

Version:

$Id: Java2DCanvasProvider.java,v 1.7 2008-05-13 13:00:46 jmaerki Exp $

Author:

Jeremias Maerki

Field Summary

Fields inherited from class org.krysalis.barcode4j.output.AbstractCanvasProvider

bardim

Constructor Summary

Constructors

Constructor and Description
Java2DCanvasProvider(Graphics2D g2d, int orientation) Creates a new Java2DCanvasProvider.

Method Summary

Modifier and Type	Method and Description
void	deviceDrawRect(double x, double y, double w, double h)
void	deviceFillRect(double x, double y, double w, double h) Paints a filled rectangle.
void	deviceText(String text, double x1, double x2, double y1, String fontName, double fontSize, TextAlignment textAlign) Draws text.
void	establishDimensions(BarcodeDimension dim) Sets the dimensions of the barcode.
Graphics2D	getGraphics2D() Returns the Graphics2D in use.
void	setGraphics2D(Graphics2D g2d) Sets the Graphics2D instance to paint on

Methods inherited from class org.krysalis.barcode4j.output.AbstractCanvasProvider

deviceCenteredText, deviceJustifiedText, getDimensions, getOrientation

Methods inherited from class java.lang.Object

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

Constructor Detail

Java2DCanvasProvider

public Java2DCanvasProvider(Graphics2D g2d,
                            int orientation)

Creates a new Java2DCanvasProvider.

This class internally operates with millimeters (mm) as units. This means you have to apply the necessary transformation before rendering a barcode to obtain the expected size. See the source code for BitmapBuilder.java for an example.

To improve the quality of text output it is recommended that fractional font metrics be enabled on the Graphics2D object passed in:
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

Parameters:

g2d - Graphics2D object to paint on

orientation - Orientation must be 0, 90, 180, 270, -90, -180 or -270

See Also:

BarcodeDimension.normalizeOrientation(int)

Method Detail

setGraphics2D

public void setGraphics2D(Graphics2D g2d)

Sets the Graphics2D instance to paint on

Parameters:

g2d - the Graphics2D instance

getGraphics2D

public Graphics2D getGraphics2D()

Returns the Graphics2D in use.

Returns:

the Graphics2D instance to paint on

establishDimensions

public void establishDimensions(BarcodeDimension dim)

Sets the dimensions of the barcode.

Specified by:

establishDimensions in interface CanvasProvider

Overrides:

establishDimensions in class AbstractCanvasProvider

Parameters:

dim - the dimensions of the barcode

deviceFillRect

public void deviceFillRect(double x,
                           double y,
                           double w,
                           double h)

Paints a filled rectangle.

Parameters:

x - x coordinate of the upper left corner

y - y coordinate of the upper left corner

w - the width

h - the height

deviceDrawRect

public void deviceDrawRect(double x,
                           double y,
                           double w,
                           double h)

deviceText

public void deviceText(String text,
                       double x1,
                       double x2,
                       double y1,
                       String fontName,
                       double fontSize,
                       TextAlignment textAlign)

Draws text.

Parameters:

text - the text to draw

x1 - the left boundary

x2 - the right boundary

y1 - the y coordinate

fontName - the name of the font

fontSize - the size of the font

textAlign - the text alignment