org.jplot2d.transform

Class PaperTransform

java.lang.Object

org.jplot2d.transform.PaperTransform

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

RotatablePaperTransform

public class PaperTransform
extends java.lang.Object
implements java.lang.Cloneable

Defines the conversion between paper units and device units. Every component has its own paper coordinate system, and maintains a PaperTransform object.

The transform is defined by 3 parameters. The xoff is the paper distance between component left bound to device left bound. The yoff is the paper distance between component bottom bound to device top bound. The scale is the factor of device to paper.

Constructor Summary

Constructors

Constructor and Description
PaperTransform(double xoff, double yoff, double scale)
PaperTransform(java.awt.geom.Point2D p, double scale)

Method Summary

Modifier and Type	Method and Description
PaperTransform	clone()
boolean	equals(java.lang.Object obj)
java.awt.geom.Point2D	getDtoP(java.awt.geom.Point2D d)
java.awt.geom.Point2D	getOffset()
java.awt.geom.Point2D	getPtoD(java.awt.geom.Point2D p)
java.awt.Shape	getPtoD(java.awt.geom.Rectangle2D p) Returns a shape in device coordinate system.
double	getScale()
java.awt.geom.AffineTransform	getTransform() Returns an AffineTransform to transform shapes from PCS to DCS.
double	getXDtoP(double xd) Transform device units to paper for the x direction.
double	getXPtoD(double xp)
double	getYDtoP(double yd) Transform device units to paper for the y direction.
double	getYPtoD(double yp)
int	hashCode()
PaperTransform	rotate(double theta)
java.lang.String	toString()
PaperTransform	translate(double tx, double ty) Concatenates this transform with a translation transformation.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PaperTransform

public PaperTransform(double xoff,
                      double yoff,
                      double scale)

PaperTransform

public PaperTransform(java.awt.geom.Point2D p,
                      double scale)

Method Detail

clone

public PaperTransform clone()

Overrides:

clone in class java.lang.Object

getOffset

public java.awt.geom.Point2D getOffset()

getScale

public double getScale()

translate

public PaperTransform translate(double tx,
                                double ty)

Concatenates this transform with a translation transformation.

Parameters:

tx - the distance by which coordinates are translated in the X axis direction

ty - the distance by which coordinates are translated in the Y axis direction

rotate

public PaperTransform rotate(double theta)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getXPtoD

public double getXPtoD(double xp)

getYPtoD

public double getYPtoD(double yp)

getXDtoP

public double getXDtoP(double xd)

Transform device units to paper for the x direction.

Parameters:

xd - device x coordinate

Returns:

paper x coordinate

getYDtoP

public double getYDtoP(double yd)

Transform device units to paper for the y direction.

Parameters:

yd - device y coordinate

Returns:

paper y coordinate

getPtoD

public java.awt.geom.Point2D getPtoD(java.awt.geom.Point2D p)

getDtoP

public java.awt.geom.Point2D getDtoP(java.awt.geom.Point2D d)

getPtoD

public java.awt.Shape getPtoD(java.awt.geom.Rectangle2D p)

Returns a shape in device coordinate system.

Parameters:

p -

Returns:

getTransform

public java.awt.geom.AffineTransform getTransform()

Returns an AffineTransform to transform shapes from PCS to DCS.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object