public class Transform extends Resource
Application code must explicitly invoke the Transform.dispose()
method to release the operating system resources managed by each instance
when those instances are no longer required.
Constructor and Description 

Transform(Device device)
Constructs a new identity Transform.

Transform(Device device,
float[] elements)
Constructs a new Transform given an array of elements that represent the matrix that describes
the transformation.

Transform(Device device,
float m11,
float m12,
float m21,
float m22,
float dx,
float dy)
Constructs a new Transform given all of the elements that represent the matrix that describes
the transformation.

Modifier and Type  Method and Description 

void 
getElements(float[] elements)
Fills the parameter with the values of the transformation matrix that the receiver represents,
in the order {m11, m12, m21, m22, dx, dy}.

void 
identity()
Modifies the receiver such that the matrix it represents becomes the identity matrix.

void 
invert()
Modifies the receiver such that the matrix it represents becomes the mathematical inverse of
the matrix it previously represented.

boolean 
isIdentity()
Returns
true if the Transform represents the identity matrix and false otherwise. 
void 
multiply(Transform matrix)
Modifies the receiver such that the matrix it represents becomes the the result of multiplying
the matrix it previously represented by the argument.

void 
rotate(float angle)
Modifies the receiver so that it represents a transformation that is equivalent to its previous
transformation rotated by the specified angle.

void 
scale(float scaleX,
float scaleY)
Modifies the receiver so that it represents a transformation that is equivalent to its previous
transformation scaled by (scaleX, scaleY).

void 
setElements(float m11,
float m12,
float m21,
float m22,
float dx,
float dy)
Modifies the receiver to represent a new transformation given all of the elements that
represent the matrix that describes that transformation.

void 
shear(float shearX,
float shearY)
Modifies the receiver so that it represents a transformation that is equivalent to its previous
transformation sheared by (shearX, shearY).

java.lang.String 
toString()
Returns a string containing a concise, humanreadable description of the receiver.

void 
transform(float[] pointArray)
Given an array containing points described by alternating x and y values, modify that array
such that each point has been replaced with the result of applying the transformation
represented by the receiver to that point.

void 
translate(float offsetX,
float offsetY)
Modifies the receiver so that it represents a transformation that is equivalent to its previous
transformation translated by (offsetX, offsetY).

dispose, getDevice, isDisposed
public Transform(Device device)
This operation requires the operating system's advanced graphics subsystem which may not be available on some platforms.
device
 the device on which to allocate the Transformjava.lang.IllegalArgumentException
 Resource.dispose()
public Transform(Device device, float[] elements)
This operation requires the operating system's advanced graphics subsystem which may not be available on some platforms.
device
 the device on which to allocate the Transformelements
 an array of floats that describe the transformation matrixjava.lang.IllegalArgumentException
 Resource.dispose()
public Transform(Device device, float m11, float m12, float m21, float m22, float dx, float dy)
This operation requires the operating system's advanced graphics subsystem which may not be available on some platforms.
device
 the device on which to allocate the Transformm11
 the first element of the first row of the matrixm12
 the second element of the first row of the matrixm21
 the first element of the second row of the matrixm22
 the second element of the second row of the matrixdx
 the third element of the first row of the matrixdy
 the third element of the second row of the matrixjava.lang.IllegalArgumentException
 Resource.dispose()
public void getElements(float[] elements)
elements
 array to hold the matrix valuesSWTException
 java.lang.IllegalArgumentException
 public void setElements(float m11, float m12, float m21, float m22, float dx, float dy)
m11
 the first element of the first row of the matrixm12
 the second element of the first row of the matrixm21
 the first element of the second row of the matrixm22
 the second element of the second row of the matrixdx
 the third element of the first row of the matrixdy
 the third element of the second row of the matrixSWTException
 public void identity()
SWTException
 public boolean isIdentity()
true
if the Transform represents the identity matrix and false otherwise.true
if the receiver is an identity Transform, and false
otherwisepublic void invert()
SWTException
 public void multiply(Transform matrix)
matrix
 the matrix to multiply the receiver bySWTException
 java.lang.IllegalArgumentException
 public void translate(float offsetX, float offsetY)
offsetX
 the distance to translate in the X directionoffsetY
 the distance to translate in the Y directionSWTException
 public void scale(float scaleX, float scaleY)
scaleX
 the amount to scale in the X directionscaleY
 the amount to scale in the Y directionSWTException
 public void rotate(float angle)
angle
 the angle to rotate the transformation bySWTException
 public void shear(float shearX, float shearY)
shearX
 the shear factor in the X directionshearY
 the shear factor in the Y directionSWTException
 public void transform(float[] pointArray)
pointArray
 an array of alternating x and y values to be transformedjava.lang.IllegalArgumentException
 SWTException
 public java.lang.String toString()
toString
in class java.lang.Object
Copyright (c) EclipseSource and others 2002, 2017. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0