android.view.animation
Class Transformation

java.lang.Object
  android.view.animation.Transformation

public class Transformation
extends Object

Defines the transformation to be applied at one point in time of an Animation.

Field Summary

protected float	mAlpha
protected Matrix	mMatrix
protected int	mTransformationType
static int	TYPE_ALPHA Indicates a transformation that applies an alpha only (uses an identity matrix.)
static int	TYPE_BOTH Indicates a transformation that applies an alpha and a matrix.
static int	TYPE_IDENTITY Indicates a transformation that has no effect (alpha = 1 and identity matrix.)
static int	TYPE_MATRIX Indicates a transformation that applies a matrix only (alpha = 1.)

Constructor Summary

Transformation()
Creates a new transformation with alpha = 1 and the identity matrix.

Method Summary

void	clear() Reset the transformation to a state that leaves the object being animated in an unmodified state.
void	compose(Transformation t) Apply this Transformation to an existing Transformation, e.g.
float	getAlpha()
Matrix	getMatrix()
int	getTransformationType() Indicates the nature of this transformation.
void	set(Transformation t) Clones the specified transformation.
void	setAlpha(float alpha) Sets the degree of transparency
void	setTransformationType(int transformationType) Sets the transformation type.
String	toString() Returns a string containing a concise, human-readable description of the receiver.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_IDENTITY

public static int TYPE_IDENTITY

Indicates a transformation that has no effect (alpha = 1 and identity matrix.)

TYPE_ALPHA

public static int TYPE_ALPHA

Indicates a transformation that applies an alpha only (uses an identity matrix.)

TYPE_MATRIX

public static int TYPE_MATRIX

Indicates a transformation that applies a matrix only (alpha = 1.)

TYPE_BOTH

public static int TYPE_BOTH

Indicates a transformation that applies an alpha and a matrix.

mMatrix

protected Matrix mMatrix

mAlpha

protected float mAlpha

mTransformationType

protected int mTransformationType

Constructor Detail

Transformation

public Transformation()

Creates a new transformation with alpha = 1 and the identity matrix.

Method Detail

clear

public void clear()

Reset the transformation to a state that leaves the object being animated in an unmodified state. The transformation type is TYPE_BOTH by default.

getTransformationType

public int getTransformationType()

Indicates the nature of this transformation.

Returns:

TYPE_ALPHA, TYPE_MATRIX, TYPE_BOTH or TYPE_IDENTITY.

setTransformationType

public void setTransformationType(int transformationType)

Sets the transformation type.

Parameters:

transformationType - One of TYPE_ALPHA, TYPE_MATRIX, TYPE_BOTH or TYPE_IDENTITY.

set

public void set(Transformation t)

Clones the specified transformation.

Parameters:

t - The transformation to clone.

compose

public void compose(Transformation t)

Apply this Transformation to an existing Transformation, e.g. apply a scale effect to something that has already been rotated.

Parameters:

t -

getMatrix

public Matrix getMatrix()

Returns:

The 3x3 Matrix representing the trnasformation to apply to the coordinates of the object being animated

setAlpha

public void setAlpha(float alpha)

Sets the degree of transparency

Parameters:

alpha - 1.0 means fully opaqe and 0.0 means fully transparent

getAlpha

public float getAlpha()

Returns:

The degree of transparency

toString

public String toString()

Description copied from class: Object

Returns a string containing a concise, human-readable description of the receiver.

Overrides:

toString in class Object

Returns:

String a printable representation for the receiver.