Top Description Fields Constructors Methods
javafx.scene.layout

public final Class BackgroundImage

extends Object
implements Interpolatable<BackgroundImage>
Class Inheritance
All Implemented Interfaces
javafx.animation.Interpolatable
Imports
javafx.animation.Interpolatable, javafx.beans.NamedArg, javafx.scene.image.Image, java.util.Objects

Defines properties describing how to render an image as the background to some Region. A BackgroundImage must have an Image specified (it cannot be null). The repeatX and repeatY properties define how the image is to be repeated in each direction. The position property defines how to position the image on the Region while the size property defines the size of the image on the Region. For example, the size might be defined with cover = true, meaning the image should be stretched to cover the entire rendering surface of the Region.

Because the BackgroundImage is immutable, it can safely be used in any cache, and can safely be reused among multiple Regions.

Since
JavaFX 8.0

Field Summary

Modifier and TypeField and Description
private final int
hash

A cached hash code for faster secondary usage.

private final Image
pack-priv Boolean
opaque

The Background will cache here whether this BackgroundImage is opaque.

pack-priv final BackgroundPosition
pack-priv final BackgroundRepeat
pack-priv final BackgroundRepeat
pack-priv final BackgroundSize

Constructor Summary

AccessConstructor and Description
public
BackgroundImage(Image
The image to use. This cannot be null.
image
,
BackgroundRepeat
The BackgroundRepeat for the x axis. If null, this value defaults to REPEAT.
repeatX
,
BackgroundRepeat
The BackgroundRepeat for the y axis. If null, this value defaults to REPEAT.
repeatY
,
BackgroundPosition
The BackgroundPosition to use. If null, defaults to BackgroundPosition.DEFAULT.
position
,
BackgroundSize
The BackgroundSize. If null, defaults to BackgroundSize.DEFAULT.
size
)

Creates a new BackgroundImage.

Method Summary

Modifier and TypeMethod and Description
public boolean
equals(Object o)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

public final Image

Returns:

the image to be used
getImage
()

The image to be used.

public final BackgroundPosition

Returns:

the position of this BackgroundImage relative to the Region
getPosition
()

The position of this BackgroundImage relative to the Region.

public final BackgroundRepeat

Returns:

the BackgroundRepeat that indicates if the background image is to be repeated along the x-axis of the region
getRepeatX
()

Indicates in what manner (if at all) the background image is to be repeated along the x-axis of the region.

public final BackgroundRepeat

Returns:

the BackgroundRepeat that indicates if the background image is to be repeated along the y-axis of the region
getRepeatY
()

Indicates in what manner (if at all) the background image is to be repeated along the y-axis of the region.

public final BackgroundSize

Returns:

the size of this image relative to the Region
getSize
()

The size of this image relative to the Region.

public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for this object.

public BackgroundImage
interpolate(BackgroundImage endValue, double t)

Implements javafx.animation.Interpolatable.interpolate.

Returns an intermediate value between the value of this Interpolatable and the specified endValue using the linear interpolation factor t, ranging from 0 (inclusive) to 1 (inclusive).

private boolean
Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAlltoStringwaitwaitwait

Field Detail

hashback to summary
private final int hash

A cached hash code for faster secondary usage. It is expected that BackgroundImage will be pulled from a cache in many cases.

imageback to summary
private final Image image
opaqueback to summary
pack-priv Boolean opaque

The Background will cache here whether this BackgroundImage is opaque. If this value is null, then it means we don't yet know. If it is non null, then we know for certain it either is, or is not, opaque. Opaque in this case means that the BackgroundImage's image is opaque.

positionback to summary
pack-priv final BackgroundPosition position
repeatXback to summary
pack-priv final BackgroundRepeat repeatX
repeatYback to summary
pack-priv final BackgroundRepeat repeatY
sizeback to summary
pack-priv final BackgroundSize size

Constructor Detail

BackgroundImageback to summary
public BackgroundImage(Image image, BackgroundRepeat repeatX, BackgroundRepeat repeatY, BackgroundPosition position, BackgroundSize size)

Creates a new BackgroundImage. The image must be specified.

Parameters
image:Image

The image to use. This cannot be null.

repeatX:BackgroundRepeat

The BackgroundRepeat for the x axis. If null, this value defaults to REPEAT.

repeatY:BackgroundRepeat

The BackgroundRepeat for the y axis. If null, this value defaults to REPEAT.

position:BackgroundPosition

The BackgroundPosition to use. If null, defaults to BackgroundPosition.DEFAULT.

size:BackgroundSize

The BackgroundSize. If null, defaults to BackgroundSize.DEFAULT.

Method Detail

equalsback to summary
public boolean equals(Object o)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Annotations
@Override
getImageback to summary
public final Image getImage()

The image to be used. This will never be null. If this image fails to load, then the entire BackgroundImage will be skipped at rendering time.

Returns:Image

the image to be used

getPositionback to summary
public final BackgroundPosition getPosition()

The position of this BackgroundImage relative to the Region. Note that any position outside the background area of the region will be clipped.

Returns:BackgroundPosition

the position of this BackgroundImage relative to the Region

getRepeatXback to summary
public final BackgroundRepeat getRepeatX()

Indicates in what manner (if at all) the background image is to be repeated along the x-axis of the region. This will never be null.

Returns:BackgroundRepeat

the BackgroundRepeat that indicates if the background image is to be repeated along the x-axis of the region

getRepeatYback to summary
public final BackgroundRepeat getRepeatY()

Indicates in what manner (if at all) the background image is to be repeated along the y-axis of the region. This will never be null.

Returns:BackgroundRepeat

the BackgroundRepeat that indicates if the background image is to be repeated along the y-axis of the region

getSizeback to summary
public final BackgroundSize getSize()

The size of this image relative to the Region.

Returns:BackgroundSize

the size of this image relative to the Region

hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Annotations
@Override
interpolateback to summary
public BackgroundImage interpolate(BackgroundImage endValue, double t)

Implements javafx.animation.Interpolatable.interpolate.

Doc from javafx.animation.Interpolatable.interpolate.

Returns an intermediate value between the value of this Interpolatable and the specified endValue using the linear interpolation factor t, ranging from 0 (inclusive) to 1 (inclusive).

The returned value might not be a new instance; the implementation might also return one of the two existing instances if the intermediate value would be equal to one of the existing values. However, this is an optimization and applications should not assume any particular identity of the returned value.

Annotations
@Override
Exceptions
NullPointerException:
if endValue is null
Since
24
isSameback to summary
private boolean isSame(Image image, BackgroundRepeat repeatX, BackgroundRepeat repeatY, BackgroundPosition position, BackgroundSize size)