javafx.scene.paint

Class ImagePattern

java.lang.Object

javafx.scene.paint.Paint

javafx.scene.paint.ImagePattern

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 and 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 and Description
double	getHeight() Gets the height of the anchor rectangle.
Image	getImage() Gets the image to be used as a paint.
double	getWidth() Gets the width of the anchor rectangle.
double	getX() Gets the x origin of the anchor rectangle.
double	getY() Gets the y origin of the anchor rectangle.
boolean	isOpaque() Gets whether this Paint is completely opaque.
boolean	isProportional() Gets a boolean that indicates whether start and end locations are proportional or absolute.

Methods inherited from class javafx.scene.paint.Paint

valueOf

Methods inherited from class java.lang.Object

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

Constructor Detail

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 Detail

getImage

public final Image getImage()

Gets the image to be used as a paint.

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

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

Returns:

The y origin of the anchor rectangle.

getWidth

public final double getWidth()

Gets the width of the anchor rectangle.

Default value:

1.0

Returns:

The width of the anchor rectangle.

getHeight

public final double getHeight()

Gets the height of the anchor rectangle.

Default value:

1.0

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

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.