javafx.scene.layout.Border Maven / Gradle / Ivy
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package javafx.scene.layout;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javafx.beans.NamedArg;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.paint.Paint;
import com.sun.javafx.UnmodifiableArrayList;
import javafx.css.CssMetaData;
import com.sun.javafx.css.SubCssMetaData;
import javafx.css.converter.InsetsConverter;
import javafx.css.converter.URLConverter;
import com.sun.javafx.scene.layout.region.BorderImageSlices;
import com.sun.javafx.scene.layout.region.BorderImageWidthConverter;
import com.sun.javafx.scene.layout.region.CornerRadiiConverter;
import com.sun.javafx.scene.layout.region.LayeredBorderPaintConverter;
import com.sun.javafx.scene.layout.region.LayeredBorderStyleConverter;
import com.sun.javafx.scene.layout.region.Margins;
import com.sun.javafx.scene.layout.region.RepeatStruct;
import com.sun.javafx.scene.layout.region.RepeatStructConverter;
import com.sun.javafx.scene.layout.region.SliceSequenceConverter;
import javafx.css.Styleable;
/**
* The border of a {@link Region}. A {@code Border} is an immutable object which
* encapsulates the entire set of data required to render the border
* of a {@code Region}. Because this class is immutable, you can freely reuse the same
* {@code Border} on many different {@code Region}s. Please refer to
* JavaFX CSS Reference Guide for a
* complete description of the CSS rules for styling the border of a {@code Region}.
*
* Every {@code Border} is comprised of {@link #getStrokes() strokes} and / or
* {@link #getImages() images}. Neither list will ever be {@code null}, but either or
* both may be empty. When rendering, if no images are specified or no
* image succeeds in loading, then all strokes will be rendered in order.
* If any image is specified and succeeds in loading, then no strokes will
* be drawn, although they will still contribute to the {@link #getInsets() insets}
* and {@link #getOutsets() outsets} of the {@code Border}.
*
* The {@code Border}'s {@code outsets} define any extension of the drawing area of a {@code Region}
* which is necessary to account for all border drawing and positioning. These {@code outsets} are defined
* by both the {@link BorderStroke}s and {@link BorderImage}s specified on this {@code Border}.
* {@code outsets} are strictly non-negative.
*
* {@code insets} are used to define the inner-most edge of all of the borders. It also is
* always strictly non-negative. The {@code Region} uses the insets of the {@link Background} and {@code Border},
* and the {@link Region#getPadding() Region's padding} to determine the
* {@code Region} {@link Region#getInsets() insets}, which define the content area
* for any children of the {@code Region}. The {@code outsets} of a {@code Border} together with the {@code outsets} of
* a {@code Background}, and the width and height of the {@code Region} define the geometric bounds of the
* {@code Region} (which in turn contribute to the {@code layoutBounds}, {@code boundsInLocal}, and
* {@code boundsInParent}).
*
* A {@code Border} is most often used in cases where you want to skin the {@code Region} with an image,
* often used in conjunction with 9-patch scaling techniques. In such cases, you may
* also specify a stroked border which is only used when the image fails to load for some
* reason.
*
* @since JavaFX 8.0
*/
@SuppressWarnings("unchecked")
public final class Border {
static final CssMetaData BORDER_COLOR =
new SubCssMetaData("-fx-border-color",
LayeredBorderPaintConverter.getInstance());
static final CssMetaData BORDER_STYLE =
new SubCssMetaData("-fx-border-style",
LayeredBorderStyleConverter.getInstance());
static final CssMetaData BORDER_WIDTH =
new SubCssMetaData ("-fx-border-width",
Margins.SequenceConverter.getInstance());
static final CssMetaData BORDER_RADIUS =
new SubCssMetaData("-fx-border-radius",
CornerRadiiConverter.getInstance());
static final CssMetaData BORDER_INSETS =
new SubCssMetaData("-fx-border-insets",
InsetsConverter.SequenceConverter.getInstance());
static final CssMetaData BORDER_IMAGE_SOURCE =
new SubCssMetaData("-fx-border-image-source",
URLConverter.SequenceConverter.getInstance());
static final CssMetaData BORDER_IMAGE_REPEAT =
new SubCssMetaData("-fx-border-image-repeat",
RepeatStructConverter.getInstance(),
new RepeatStruct[] { new RepeatStruct(BackgroundRepeat.REPEAT, BackgroundRepeat.REPEAT) });
static final CssMetaData BORDER_IMAGE_SLICE =
new SubCssMetaData ("-fx-border-image-slice",
SliceSequenceConverter.getInstance(),
new BorderImageSlices[] { BorderImageSlices.DEFAULT});
static final CssMetaData BORDER_IMAGE_WIDTH =
new SubCssMetaData("-fx-border-image-width",
BorderImageWidthConverter.getInstance(),
new BorderWidths[] { BorderWidths.DEFAULT });
static final CssMetaData BORDER_IMAGE_INSETS =
new SubCssMetaData("-fx-border-image-insets",
InsetsConverter.SequenceConverter.getInstance(),
new Insets[] {Insets.EMPTY});
private static final List> STYLEABLES =
(List>) (List) Collections.unmodifiableList(
// Unchecked!
Arrays.asList(BORDER_COLOR,
BORDER_STYLE,
BORDER_WIDTH,
BORDER_RADIUS,
BORDER_INSETS,
BORDER_IMAGE_SOURCE,
BORDER_IMAGE_REPEAT,
BORDER_IMAGE_SLICE,
BORDER_IMAGE_WIDTH,
BORDER_IMAGE_INSETS));
/**
* @return The CssMetaData associated with this class, which may include the
* CssMetaData of its superclasses.
*/
public static List> getClassCssMetaData() {
return STYLEABLES;
}
/**
* An empty Border, useful to use instead of null.
*/
public static final Border EMPTY = new Border((BorderStroke[])null, null);
/**
* The list of BorderStrokes which together define the stroked portion
* of this Border. This List is unmodifiable and immutable. It
* will never be null. It will never contain any null elements.
* @return the list of BorderStrokes which together define the stroked
* portion of this Border
*/
public final List getStrokes() { return strokes; }
final List strokes;
/**
* The list of BorderImages which together define the images to use
* instead of stroke for this Border. If this list is specified and
* at least one image within it succeeds in loading, then any specified
* {@link #getStrokes strokes} are not drawn. If this list is null or no images
* succeeded in loading, then any specified {@code strokes} are drawn.
*
* This List is unmodifiable and immutable. It will never be null.
* It will never contain any null elements.
* @return the list of BorderImages which together define the images to use
* instead of stroke for this Border
*/
public final List getImages() { return images; }
final List images;
/**
* The outsets of the border define the outer-most edge of the border to be drawn.
* The values in these outsets are strictly non-negative.
* @return the outsets of the border define the outer-most edge of the
* border to be drawn
*/
public final Insets getOutsets() { return outsets; }
final Insets outsets;
/**
* The insets define the distance from the edge of the Region to the inner-most edge
* of the border, if that distance is non-negative. The values in these insets
* are strictly non-negative.
* @return the insets define the distance from the edge of the Region to the
* inner-most edge of the border
*/
public final Insets getInsets() { return insets; }
final Insets insets;
/**
* Gets whether the Border is empty. It is empty if there are no strokes or images.
* @return true if the Border is empty, false otherwise.
*/
public final boolean isEmpty() {
return strokes.isEmpty() && images.isEmpty();
}
/**
* The cached hash code computation for the Border. One very big
* reason for making Border immutable was to make it possible to
* cache and reuse the same Border instance for multiple
* Regions. To enable efficient caching, we cache the hash.
*/
private final int hash;
/**
* Creates a new Border by supplying an array of BorderStrokes.
* This array may be null, or may contain null values. Any null values
* will be ignored and will not contribute to the {@link #getStrokes() strokes}
* or {@link #getOutsets() outsets} or {@link #getInsets() insets}.
*
* @param strokes The strokes. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of strokes. A null array becomes an empty List.
* If both strokes and images are specified, and if any one
* of the images specified succeeds in loading, then no
* strokes are shown. In this way, strokes can be defined as
* a fallback in the case that an image failed to load.
*/
public Border(@NamedArg("strokes") BorderStroke... strokes) {
this(strokes, null);
}
/**
* Creates a new Border by supplying an array of BorderImages.
* This array may be null, or may contain null values. Any null values
* will be ignored and will not contribute to the {@link #getImages() images}
* or {@link #getOutsets() outsets} or {@link #getInsets() insets}.
*
* @param images The images. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of images. A null array becomes an empty List.
*/
public Border(@NamedArg("images") BorderImage... images) {
this(null, images);
}
/**
* Creates a new Border by supplying a List of BorderStrokes and BorderImages.
* These Lists may be null, or may contain null values. Any null values
* will be ignored and will not contribute to the {@link #getStrokes() strokes}
* or {@link #getImages() images}, {@link #getOutsets() outsets}, or
* {@link #getInsets() insets}.
*
* @param strokes The strokes. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of strokes. A null array becomes an empty List.
* If both strokes and images are specified, and if any one
* of the images specified succeeds in loading, then no
* strokes are shown. In this way, strokes can be defined as
* a fallback in the case that an image failed to load.
* @param images The images. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of images. A null array becomes an empty List.
*/
public Border(@NamedArg("strokes") List strokes, @NamedArg("images") List images) {
// NOTE: This constructor had to be supplied in order to cause a Builder
// to be auto-generated, because otherwise the types of the strokes and images
// properties didn't match the types of the array based constructor parameters.
// So a Builder will use this constructor, while the CSS engine uses the
// array based constructor (for speed).
this(strokes == null ? null : strokes.toArray(new BorderStroke[strokes.size()]),
images == null ? null : images.toArray(new BorderImage[images.size()]));
}
/**
* Creates a new Border by supplying an array of BorderStrokes and BorderImages.
* These arrays may be null, or may contain null values. Any null values
* will be ignored and will not contribute to the {@link #getStrokes() strokes}
* or {@link #getImages() images}, {@link #getOutsets() outsets}, or
* {@link #getInsets() insets}.
*
* @param strokes The strokes. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of strokes. A null array becomes an empty List.
* If both strokes and images are specified, and if any one
* of the images specified succeeds in loading, then no
* strokes are shown. In this way, strokes can be defined as
* a fallback in the case that an image failed to load.
* @param images The images. This may be null, and may contain nulls. Any
* contained nulls are filtered out and not included in the
* final List of images. A null array becomes an empty List.
*/
public Border(@NamedArg("strokes") BorderStroke[] strokes, @NamedArg("images") BorderImage[] images) {
double innerTop = 0, innerRight = 0, innerBottom = 0, innerLeft = 0;
double outerTop = 0, outerRight = 0, outerBottom = 0, outerLeft = 0;
if (strokes == null || strokes.length == 0) {
this.strokes = Collections.emptyList();
} else {
final BorderStroke[] noNulls = new BorderStroke[strokes.length];
int size = 0;
for (int i=0; i= strokeInnerTop ? innerTop : strokeInnerTop;
innerRight = innerRight >= strokeInnerRight? innerRight : strokeInnerRight;
innerBottom = innerBottom >= strokeInnerBottom ? innerBottom : strokeInnerBottom;
innerLeft = innerLeft >= strokeInnerLeft ? innerLeft : strokeInnerLeft;
final double strokeOuterTop = stroke.outerEdge.getTop();
final double strokeOuterRight = stroke.outerEdge.getRight();
final double strokeOuterBottom = stroke.outerEdge.getBottom();
final double strokeOuterLeft = stroke.outerEdge.getLeft();
outerTop = outerTop >= strokeOuterTop ? outerTop : strokeOuterTop;
outerRight = outerRight >= strokeOuterRight? outerRight : strokeOuterRight;
outerBottom = outerBottom >= strokeOuterBottom ? outerBottom : strokeOuterBottom;
outerLeft = outerLeft >= strokeOuterLeft ? outerLeft : strokeOuterLeft;
}
}
this.strokes = new UnmodifiableArrayList(noNulls, size);
}
if (images == null || images.length == 0) {
this.images = Collections.emptyList();
} else {
final BorderImage[] noNulls = new BorderImage[images.length];
int size = 0;
for (int i=0; i= imageInnerTop ? innerTop : imageInnerTop;
innerRight = innerRight >= imageInnerRight? innerRight : imageInnerRight;
innerBottom = innerBottom >= imageInnerBottom ? innerBottom : imageInnerBottom;
innerLeft = innerLeft >= imageInnerLeft ? innerLeft : imageInnerLeft;
final double imageOuterTop = image.outerEdge.getTop();
final double imageOuterRight = image.outerEdge.getRight();
final double imageOuterBottom = image.outerEdge.getBottom();
final double imageOuterLeft = image.outerEdge.getLeft();
outerTop = outerTop >= imageOuterTop ? outerTop : imageOuterTop;
outerRight = outerRight >= imageOuterRight? outerRight : imageOuterRight;
outerBottom = outerBottom >= imageOuterBottom ? outerBottom : imageOuterBottom;
outerLeft = outerLeft >= imageOuterLeft ? outerLeft : imageOuterLeft;
}
}
this.images = new UnmodifiableArrayList(noNulls, size);
}
// Both the BorderStroke and BorderImage class make sure to return the outsets
// and insets in the right way, such that we don't have to worry about adjusting
// the sign, etc, unlike in the Background implementation.
outsets = new Insets(outerTop, outerRight, outerBottom, outerLeft);
insets = new Insets(innerTop, innerRight, innerBottom, innerLeft);
// Pre-compute the hash code. NOTE: all variables are prefixed with "this" so that we
// do not accidentally compute the hash based on the constructor arguments rather than
// based on the fields themselves!
int result = this.strokes.hashCode();
result = 31 * result + this.images.hashCode();
hash = result;
}
/**
* {@inheritDoc}
*/
@Override public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Border border = (Border) o;
if (this.hash != border.hash) return false;
if (!images.equals(border.images)) return false;
if (!strokes.equals(border.strokes)) return false;
return true;
}
/**
* {@inheritDoc}
*/
@Override public int hashCode() {
return hash;
}
}