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/*
* Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javafx.geometry;
import javafx.beans.NamedArg;
/**
* A 2D rectangle used to describe the bounds of an object. It is defined by a
* location (minX, minY) and dimension (width x height).
* @since JavaFX 2.0
*/
public class Rectangle2D {
/**
* An empty {@code Rectangle2D} instance (with all coordinates equal to zero).
*/
public static final Rectangle2D EMPTY = new Rectangle2D(0, 0, 0, 0);
/**
* The x coordinate of the upper-left corner of this {@code Rectangle2D}.
*
* @return the x coordinate of the upper-left corner
* @defaultValue 0.0
*/
public double getMinX() { return minX; }
private double minX;
/**
* The y coordinate of the upper-left corner of this {@code Rectangle2D}.
*
* @return the y coordinate of the upper-left corner
* @defaultValue 0.0
*/
public double getMinY() { return minY; }
private double minY;
/**
* The width of this {@code Rectangle2D}.
*
* @return the width
* @defaultValue 0.0
*/
public double getWidth() { return width; }
private double width;
/**
* The height of this {@code Rectangle2D}.
*
* @return the height
* @defaultValue 0.0
*/
public double getHeight() { return height; }
private double height;
/**
* The x coordinate of the lower-right corner of this {@code Rectangle2D}.
*
* @return the x coordinate of the lower-right corner
* @defaultValue {@code minX + width}
*/
public double getMaxX() { return maxX; }
private double maxX;
/**
* The y coordinate of the lower-right corner of this {@code Rectangle2D}.
*
* @return the y coordinate of the lower-right corner
* @defaultValue {@code minY + height}
*/
public double getMaxY() { return maxY; }
private double maxY;
/**
* Cache the hash code to make computing hashes faster.
*/
private int hash = 0;
/**
* Creates a new instance of {@code Rectangle2D}.
* @param minX The x coordinate of the upper-left corner of the {@code Rectangle2D}
* @param minY The y coordinate of the upper-left corner of the {@code Rectangle2D}
* @param width The width of the {@code Rectangle2D}
* @param height The height of the {@code Rectangle2D}
*/
public Rectangle2D(@NamedArg("minX") double minX, @NamedArg("minY") double minY, @NamedArg("width") double width, @NamedArg("height") double height) {
if (width < 0 || height < 0) {
throw new IllegalArgumentException("Both width and height must be >= 0");
}
this.minX = minX;
this.minY = minY;
this.width = width;
this.height = height;
this.maxX = minX + width;
this.maxY = minY + height;
}
/**
* Tests if the specified point is inside the boundary of {@code Rectangle2D}.
*
* @param p the specified point to be tested
* @return true if the specified point is inside the boundary of this
* {@code Rectangle2D}; false otherwise
*/
public boolean contains(Point2D p) {
if (p == null) return false;
return contains(p.getX(), p.getY());
}
/**
* Tests if the specified {@code (x, y)} coordinates are inside the boundary
* of {@code Rectangle2D}.
*
* @param x the specified x coordinate to be tested
* @param y the specified y coordinate to be tested
* @return true if the specified {@code (x, y)} coordinates are inside the
* boundary of this {@code Rectangle2D}; false otherwise
*/
public boolean contains(double x, double y) {
return x >= minX && x <= maxX && y >= minY && y <= maxY;
}
/**
* Tests if the interior of this {@code Rectangle2D} entirely contains the
* specified Rectangle2D, {@code r}.
*
* @param r The specified Rectangle2D
* @return true if the specified Rectangle2D, {@code r}, is inside the
* boundary of this {@code Rectangle2D}; false otherwise
*/
public boolean contains(Rectangle2D r) {
if (r == null) return false;
return r.minX >= minX && r.minY >= minY && r.maxX <= maxX && r.maxY <= maxY;
}
/**
* Tests if the interior of this {@code Rectangle2D} entirely contains the
* specified rectangular area.
*
* @param x the x coordinate of the upper-left corner of the specified
* rectangular area
* @param y the y coordinate of the upper-left corner of the specified
* rectangular area
* @param w the width of the specified rectangular area
* @param h the height of the specified rectangular area
* @return true if the interior of this {@code Rectangle2D} entirely contains
* the specified rectangular area; false otherwise
*/
public boolean contains(double x, double y, double w, double h) {
return x >= minX && y >= minY && w <= maxX - x && h <= maxY - y;
}
/**
* Tests if the interior of this {@code Rectangle2D} intersects the interior
* of a specified Rectangle2D, {@code r}.
*
* @param r The specified Rectangle2D
* @return true if the interior of this {@code Rectangle2D} and the interior
* of the specified Rectangle2D, {@code r}, intersect
*/
public boolean intersects(Rectangle2D r) {
if (r == null) return false;
return r.maxX > minX && r.maxY > minY && r.minX < maxX && r.minY < maxY;
}
/**
* Tests if the interior of this {@code Rectangle2D} intersects the interior
* of a specified rectangular area.
*
* @param x the x coordinate of the upper-left corner of the specified
* rectangular area
* @param y the y coordinate of the upper-left corner of the specified
* rectangular area
* @param w the width of the specified rectangular area
* @param h the height of the specified rectangular area
* @return true if the interior of this {@code Rectangle2D} and the interior
* of the rectangular area intersect
*/
public boolean intersects(double x, double y, double w, double h) {
return x < maxX && y < maxY && x + w > minX && y + h > minY;
}
/**
* Indicates whether some other object is "equal to" this one.
* @param obj the reference object with which to compare.
* @return {@code true} if this object is equal to the {@code obj} argument; {@code false} otherwise
*/
@Override public boolean equals(Object obj) {
if (obj == this) return true;
if (obj instanceof Rectangle2D) {
Rectangle2D other = (Rectangle2D) obj;
return minX == other.minX
&& minY == other.minY
&& width == other.width
&& height == other.height;
} else return false;
}
/**
* Returns a hash code for this {@code Rectangle2D} object.
* @return a hash code for this {@code Rectangle2D} object.
*/
@Override public int hashCode() {
if (hash == 0) {
long bits = 7L;
bits = 31L * bits + Double.doubleToLongBits(minX);
bits = 31L * bits + Double.doubleToLongBits(minY);
bits = 31L * bits + Double.doubleToLongBits(width);
bits = 31L * bits + Double.doubleToLongBits(height);
hash = (int) (bits ^ (bits >> 32));
}
return hash;
}
/**
* Returns a string representation of this {@code Rectangle2D}.
* This method is intended to be used only for informational purposes.
* The content and format of the returned string might vary between
* implementations.
* The returned string might be empty but cannot be {@code null}.
*/
@Override public String toString() {
return "Rectangle2D [minX = " + minX
+ ", minY=" + minY
+ ", maxX=" + maxX
+ ", maxY=" + maxY
+ ", width=" + width
+ ", height=" + height
+ "]";
}
}
