Class ImagePattern

java.lang.Object

javafx.scene.paint.Paint

javafx.scene.paint.ImagePattern

All Implemented Interfaces:

Interpolatable<Paint>

public final class ImagePattern
extends Paint

The ImagePattern class fills a shape with an image pattern. The user may specify the anchor rectangle, which defines the position, width, and height of the image relative to the upper left corner of the shape. If the shape extends out of the anchor rectangle, the image is tiled.

If the proportional variable is set to true (the default) then the anchor rectangle should be specified relative to the unit square (0.0->1.0) and will be stretched across the shape. If the proportional variable is set to false, then the anchor rectangle should be specified in the local coordinate system of the shape and the image will be stretched to fit the anchor rectangle. The anchor rectangle will not be stretched across the shape.

The example below demonstrates the use of the proportional variable. The shapes on the top row use proportional coordinates (the default) to specify the anchor rectangle. The shapes on the bottom row use absolute coordinates. The flower image is stretched to fill the entire triangle shape, while the dot pattern image is tiled within the circle shape.

import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.paint.ImagePattern;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.stage.Stage;

public class HelloImagePattern extends Application {

    private static final String flowerURL = "file:flower.png";
    private static final String dotsURL = "file:dots.png";

    @Override public void start(Stage stage) {
        stage.setTitle("Image Pattern");
        Group root = new Group();
        Scene scene = new Scene(root, 600, 450);

        Image dots = new Image(dotsURL);
        Image flower = new Image(flowerURL);

        Polygon p = new Polygon();

        p.setLayoutX(10);
        p.setLayoutY(10);
        p.getPoints().add(50.0);
        p.getPoints().add(0.0);
        p.getPoints().add(100.0);
        p.getPoints().add(100.0);
        p.getPoints().add(0.0);
        p.getPoints().add(100.0);

        p.setFill(new ImagePattern(flower, 0, 0, 1, 1, true));

        root.getChildren().add(p);

        Polygon p2 = new Polygon();

        p2.setLayoutX(10);
        p2.setLayoutY(120);
        p2.getPoints().add(50.0);
        p2.getPoints().add(0.0);
        p2.getPoints().add(100.0);
        p2.getPoints().add(100.0);
        p2.getPoints().add(0.0);
        p2.getPoints().add(100.0);

        p2.setFill(new ImagePattern(flower, 0, 0, 100, 100, false));

        root.getChildren().add(p2);

        Circle circ = new Circle(50);
        circ.setTranslateX(120);
        circ.setTranslateY(10);
        circ.setCenterX(50);
        circ.setCenterY(50);
        circ.setFill(new ImagePattern(dots, 0.2, 0.2, 0.4, 0.4, true));

        root.getChildren().add(circ);

        Circle circ2 = new Circle(50);
        circ2.setTranslateX(120);
        circ2.setTranslateY(10);
        circ2.setCenterX(50);
        circ2.setCenterY(50);
        circ2.setFill(new ImagePattern(dots, 20, 20, 40, 40, false));

        root.getChildren().add(circ2);
        stage.setScene(scene);
        stage.show();
    }

The code above produces the following:

Since:

JavaFX 2.2

Constructor Summary

Constructors

Constructor	Description
ImagePattern(Image image)	Creates a new instance of ImagePattern from the specified image.
ImagePattern(Image image, double x, double y, double width, double height, boolean proportional)	Creates a new instance of ImagePattern.

Method Summary

Modifier and Type	Method	Description
final double	getHeight()	Gets the height of the anchor rectangle.
final Image	getImage()	Gets the image to be used as a paint.
final double	getWidth()	Gets the width of the anchor rectangle.
final double	getX()	Gets the x origin of the anchor rectangle.
final double	getY()	Gets the y origin of the anchor rectangle.
ImagePattern	interpolate(ImagePattern endValue, double t)	Returns an intermediate value between the value of this ImagePattern and the specified endValue using the linear interpolation factor t, ranging from 0 (inclusive) to 1 (inclusive).
Paint	interpolate(Paint endValue, double t)	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).
final boolean	isOpaque()	Gets whether this Paint is completely opaque.
final boolean	isProportional()	Gets a boolean that indicates whether start and end locations are proportional or absolute.

Methods declared in class javafx.scene.paint.Paint

valueOf

Methods declared in class java.lang.Object

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

Constructor Details

ImagePattern

public ImagePattern(Image image)

Creates a new instance of ImagePattern from the specified image. Default values are used for all other parameters.

Parameters:

image - the image to be used as the paint.

Throws:

NullPointerException - if the image is null.

IllegalArgumentException - if image is not done loading, that is if progress is < 1.

ImagePattern

public ImagePattern(Image image,
 double x,
 double y,
 double width,
 double height,
 boolean proportional)

Creates a new instance of ImagePattern.

Parameters:

image - the image to be used as the paint.

x - the x origin of the anchor rectangle.

y - the y origin of the anchor rectangle.

width - the width of the anchor rectangle.

height - the height of the anchor rectangle.

proportional - whether the coordinates are proportional to the shape which ImagePattern fills

Throws:

NullPointerException - if the image is null.

IllegalArgumentException - if image is not done loading, that is if progress is < 1.

Method Details

getImage

public final Image getImage()

Gets the image to be used as a paint.

Interpolation Type:

discrete

Returns:

Image to be used as a paint.

getX

public final double getX()

Gets the x origin of the anchor rectangle.

Default value:

0.0

Interpolation Type:

linear if both values are absolute or both values are proportional, discrete otherwise

Returns:

The x origin of the anchor rectangle.

getY

public final double getY()

Gets the y origin of the anchor rectangle.

Default value:

0.0

Interpolation Type:

linear if both values are absolute or both values are proportional, discrete otherwise

Returns:

The y origin of the anchor rectangle.

getWidth

public final double getWidth()

Gets the width of the anchor rectangle.

Default value:

1.0

Interpolation Type:

linear if both values are absolute or both values are proportional, discrete otherwise

Returns:

The width of the anchor rectangle.

getHeight

public final double getHeight()

Gets the height of the anchor rectangle.

Default value:

1.0

Interpolation Type:

linear if both values are absolute or both values are proportional, discrete otherwise

Returns:

The height of the anchor rectangle.

isProportional

public final boolean isProportional()

Gets a boolean that indicates whether start and end locations are proportional or absolute. If this flag is true, the two end points are defined in a coordinate space where coordinates in the range [0..1] are scaled to map onto the bounds of the shape that the pattern fills. If this flag is false, then the coordinates are specified in the local coordinate system of the node.

Default value:

true

Interpolation Type:

discrete

Returns:

boolean that is true if this paint is proportional.

isOpaque

public final boolean isOpaque()

Description copied from class: Paint

Gets whether this Paint is completely opaque. An opaque paint is one that has no alpha component in any of its colors. It may be possible for a Paint to be opaque and yet return false, if it cannot be easily determined whether the paint is actually opaque. For example, the ImagePattern may not be able to cheaply determine its opacity.

Specified by:

isOpaque in class Paint

Returns:

true if the Paint is opaque, false if it is not opaque or if it cannot be determined.

interpolate

public ImagePattern interpolate(ImagePattern endValue,
 double t)

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

Parameters:

endValue - the target value

t - the interpolation factor

Returns:

the intermediate value

Throws:

NullPointerException - if endValue is null

Since:

24

interpolate

public Paint interpolate(Paint endValue,
 double t)

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.

Parameters:

endValue - the target value

t - the interpolation factor

Returns:

the intermediate value

Throws:

NullPointerException - if endValue is null

Since:

24