org.krysalis.barcode4j.output
Class Canvas

java.lang.Object
  org.krysalis.barcode4j.output.Canvas

public class Canvas
extends java.lang.Object

This class is used by barcode rendering classes that paint a barcode using a coordinate system. The class delegates the call to a CanvasProvider and provides some convenience methods.

Version:

$Id: Canvas.java,v 1.4 2008/05/13 13:00:45 jmaerki Exp $

Author:

Jeremias Maerki

Constructor Summary

Canvas(CanvasProvider canvasImp)
Main constructor

Method Summary

void	drawCenteredChar(char ch, double x1, double x2, double y1, java.lang.String fontName, double fontSize) Draws a centered character.
void	drawCenteredText(java.lang.String text, double x1, double x2, double y1, java.lang.String fontName, double fontSize) Deprecated. Use drawText(String, double, double, double, String, double, TextAlignment) instead.
void	drawJustifiedText(java.lang.String text, double x1, double x2, double y1, java.lang.String fontName, double fontSize) Deprecated. Use drawText(String, double, double, double, String, double, TextAlignment) instead.
void	drawRect(double x1, double y1, double x2, double y2) Draws a rectangle.
void	drawRectWH(double x, double y, double w, double h) Draws a rectangle
void	drawText(java.lang.String text, double x1, double x2, double y1, java.lang.String fontName, double fontSize, TextAlignment textAlign) Draws text.
void	establishDimensions(BarcodeDimension dim) Sets the dimensions of the barcode.
CanvasProvider	getCanvasImp() Returns the canvas provider in use.
int	getOrientation()

Methods inherited from class java.lang.Object

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

Constructor Detail

Canvas

public Canvas(CanvasProvider canvasImp)

Main constructor

Parameters:

canvasImp - the canvas provider to use

Method Detail

getCanvasImp

public CanvasProvider getCanvasImp()

Returns the canvas provider in use.

Returns:

the canvas provider

establishDimensions

public void establishDimensions(BarcodeDimension dim)

Sets the dimensions of the barcode.

Parameters:

dim - the barcode dimensions

getOrientation

public int getOrientation()

Returns:

the orientation of the barcode (0, 90, 180, 270, -90, -180, -270)

drawRect

public void drawRect(double x1,
                     double y1,
                     double x2,
                     double y2)

Draws a rectangle.

Parameters:

x1 - x coordinate of the upper left corner

y1 - y coordinate of the upper left corner

x2 - x coordinate of the lower right corner

y2 - y coordinate of the lower right corner

drawRectWH

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

Draws a rectangle

Parameters:

x - x coordinate of the upper left corner

y - y coordinate of the upper left corner

w - the width

h - the height

drawCenteredChar

public void drawCenteredChar(char ch,
                             double x1,
                             double x2,
                             double y1,
                             java.lang.String fontName,
                             double fontSize)

Draws a centered character.

Parameters:

ch - the character

x1 - the left boundary

x2 - the right boundary

y1 - the y coordinate

fontName - the name of the font

fontSize - the size of the font

drawJustifiedText

public void drawJustifiedText(java.lang.String text,
                              double x1,
                              double x2,
                              double y1,
                              java.lang.String fontName,
                              double fontSize)

Deprecated. Use drawText(String, double, double, double, String, double, TextAlignment) instead.

Draws justified 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

drawCenteredText

public void drawCenteredText(java.lang.String text,
                             double x1,
                             double x2,
                             double y1,
                             java.lang.String fontName,
                             double fontSize)

Deprecated. Use drawText(String, double, double, double, String, double, TextAlignment) instead.

Draws centered 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

drawText

public void drawText(java.lang.String text,
                     double x1,
                     double x2,
                     double y1,
                     java.lang.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