Module javafx.graphics
Package javafx.scene.layout

Class BorderImage


  • public class BorderImage
extends Object
    Defines properties describing how to render an image as the border of some Region. A BorderImage 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 slices property defines how to slice up the image such that it can be stretched across the Region, while the widths defines the area on the Region to fill with the border image. Finally, the outsets define the distance outward from the edge of the border over which the border extends. The outsets of the BorderImage contribute to the outsets of the Border, which in turn contribute to the bounds of the Region.

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

    When applied to a Region with a defined shape, a BorderImage is ignored.

    Since:
    JavaFX 8.0

    • Constructor Detail

      • BorderImage

        public BorderImage​(Image image,
                   BorderWidths widths,
                   Insets insets,
                   BorderWidths slices,
                   boolean filled,
                   BorderRepeat repeatX,
                   BorderRepeat repeatY)
        Creates a new BorderImage. The image must be specified or a NullPointerException will be thrown.
        Parameters:
        image - The image to use. This must not be null.
        widths - The widths of the border in each dimension. A null value results in Insets.EMPTY.
        insets - The insets at which to place the border relative to the region. A null value results in Insets.EMPTY.
        slices - The slices for the image. If null, defaults to BorderImageSlices.DEFAULT
        filled - A flag indicating whether the center patch should be drawn
        repeatX - The repeat value for the border image in the x direction. If null, defaults to STRETCH.
        repeatY - The repeat value for the border image in the y direction. If null, defaults to the same value as repeatX.

    • Method Detail

      • getImage

        public final Image getImage​()
        The image to be used. This will never be null. If this image fails to load, then the entire BorderImage will be skipped at rendering time and will not contribute to any bounds or other computations.
        Returns:
        the image to be used

      • getRepeatX

        public final BorderRepeat getRepeatX​()
        Indicates in what manner (if at all) the border image is to be repeated along the x-axis of the region. If not specified, the default value is STRETCH.
        Returns:
        the BorderRepeat that indicates if the border image is to be repeated along the x-axis of the region

      • getRepeatY

        public final BorderRepeat getRepeatY​()
        Indicates in what manner (if at all) the border image is to be repeated along the y-axis of the region. If not specified, the default value is STRETCH.
        Returns:
        the BorderRepeat that indicates if the border image is to be repeated along the y-axis of the region

      • getWidths

        public final BorderWidths getWidths​()
        The widths of the border on each side. These can be defined as either to be absolute widths or percentages of the size of the Region, BorderWidths for more details. If null, this will default to being 1 pixel wide.
        Returns:
        the BorderWidths of the border on each side

      • getSlices

        public final BorderWidths getSlices​()
        Defines the slices of the image. JavaFX uses a 4-slice scheme where the slices each divide up an image into 9 patches. The top-left patch defines the top-left corner of the border. The top patch defines the top border and the image making up this patch is stretched horizontally (or whatever is defined for repeatX) to fill all the required space. The top-right patch goes in the top-right corner, and the right patch is stretched vertically (or whatever is defined for repeatY) to fill all the required space. And so on. The center patch is stretched (or whatever is defined for repeatX, repeatY) in each dimension. By default the center is omitted (ie: not drawn), although a BorderImageSlices value of true for the filled property will cause the center to be drawn. A default value for this property will result in BorderImageSlices.DEFAULT, which is a border-image-slice of 100%
        Returns:
        the BorderWidths that defines the slices of the image
        See Also:
        border-image-slice

      • isFilled

        public final boolean isFilled​()
        Specifies whether or not the center patch (as defined by the left, right, top, and bottom slices) should be drawn.
        Returns:
        true if the center patch should be drawn

      • getInsets

        public final Insets getInsets​()
        The insets of the BorderImage define where the border should be positioned relative to the edge of the Region. This value will never be null.
        Returns:
        the insets of the BorderImage

      • equals

        public boolean equals​(Object o)
        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.

        The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

        Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

        Overrides:
        equals in class Object
        Parameters:
        o - the reference object with which to compare.
        Returns:
        true if this object is the same as the obj argument; false otherwise.
        See Also:
        Object.hashCode(), HashMap

      • hashCode

        public int hashCode​()
        Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by 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(Object) 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 Object.equals(java.lang.Object) 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.

        As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (The hashCode may or may not be implemented as some function of an object's memory address at some point in time.)

        Overrides:
        hashCode in class Object
        Returns:
        a hash code value for this object.
        See Also:
        Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)