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646 lines
17 KiB
Java
646 lines
17 KiB
Java
/* Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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import java.awt.geom.*;
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import java.io.Serializable;
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/* Status: Mostly complete. Some of the Java2D stuff is commented out. */
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/**
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* This class represents a rectangle and all the interesting things you
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* might want to do with it. Note that the coordinate system uses
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* the origin (0,0) as the top left of the screen, with the x and y
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* values increasing as they move to the right and down respectively.
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*
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* @author Warren Levy <warrenl@cygnus.com>
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public class Rectangle extends Rectangle2D
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implements Cloneable, Shape, Serializable
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{
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/**
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* The X coordinate of the top-left corner of the rectangle.
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*/
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public int x;
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/**
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* The Y coordinate of the top-left corner of the rectangle;
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*/
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public int y;
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/**
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* The width of the rectangle
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*/
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public int width;
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/**
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* The height of the rectangle
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*/
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public int height;
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/**
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* Initializes a new instance of <code>Rectangle</code> with a top
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* left corner at (0,0) and a width and height of 0.
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*/
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public Rectangle()
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{
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x = 0;
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y = 0;
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width = 0;
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height = 0;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> from the
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* coordinates of the specified rectangle.
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*
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* @param rect The rectangle to copy from.
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*/
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public Rectangle(Rectangle r)
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{
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x = r.x;
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y = r.y;
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width = r.width;
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height = r.height;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> from the specified
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* inputs.
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*
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* @param x The X coordinate of the top left corner of the rectangle.
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* @param y The Y coordinate of the top left corner of the rectangle.
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* @param width The width of the rectangle.
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* @param height The height of the rectangle.
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*/
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public Rectangle(int x, int y, int width, int height)
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{
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this.x = x;
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this.y = y;
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this.width = width;
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this.height = height;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> with the specified
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* width and height. The upper left corner of the rectangle will be at
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* the origin (0,0).
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*
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* @param width The width of the rectangle.
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* @param height the height of the rectange.
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*/
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public Rectangle(int width, int height)
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{
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x = 0;
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y = 0;
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this.width = width;
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this.height = height;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> with a top-left
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* corner represented by the specified point and the width and height
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* represented by the specified dimension.
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*
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* @param point The upper left corner of the rectangle.
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* @param dim The width and height of the rectangle.
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*/
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public Rectangle(Point p, Dimension d)
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{
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x = p.x;
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y = p.y;
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width = d.width;
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height = d.height;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> with a top left
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* corner at the specified point and a width and height of zero.
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*
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* @param poin The upper left corner of the rectangle.
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*/
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public Rectangle(Point p)
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{
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x = p.x;
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y = p.y;
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width = 0;
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height = 0;
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}
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/**
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* Initializes a new instance of <code>Rectangle</code> with an
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* upper left corner at the origin (0,0) and a width and height represented
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* by the specified dimension.
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*
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* @param dim The width and height of the rectangle.
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*/
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public Rectangle(Dimension d)
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{
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x = 0;
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y = 0;
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width = d.width;
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height = d.height;
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}
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/**
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* Returns the bounding rectangle for this rectangle, which is simply
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* this rectange itself.
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*
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* @return This rectangle.
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*/
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public Rectangle getBounds ()
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{
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return (Rectangle) this.clone();
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}
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/**
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* Modifies this rectangle so that it represents the smallest rectangle
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* that contains both the existing rectangle and the specified point.
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*
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* @param x The X coordinate of the point to add to this rectangle.
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* @param y The Y coordinate of the point to add to this rectangle.
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*/
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public void add(int newx, int newy)
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{
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int x = this.x > newx ? newx : this.x;
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int y = this.y > newy ? newy : this.y;
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width = (this.x + width > newx ? this.x + width : newx) - x;
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height = (this.y + height > newy ? this.y + height : newy) - y;
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this.x = x;
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this.y = y;
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}
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/**
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* Modifies this rectangle so that it represents the smallest rectangle
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* that contains both the existing rectangle and the specified point.
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*
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* @param point The point to add to this rectangle.
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*/
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public void add(Point pt)
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{
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add (pt.x, pt.y);
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}
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/**
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* Modifies this rectangle so that it represents the smallest rectangle
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* that contains both the existing rectangle and the specified rectangle.
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*
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* @param rect The rectangle to add to this rectangle.
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*/
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public void add(Rectangle r)
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{
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int x = this.x > r.x ? r.x : this.x;
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int y = this.y > r.y ? r.y : this.y;
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width = (this.x + width > r.x + r.width ?
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this.x + width : r.x + r.width) - x;
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height = (this.y + height > r.y + r.height ?
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this.y + height : r.y + r.height) - y;
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this.x = x;
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this.y = y;
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}
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/**
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* Tests whether or not the specified point is inside this rectangle.
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*
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* @param x The X coordinate of the point to test.
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* @param y The Y coordinate of the point to test.
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*
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* @return <code>true</code> if the point is inside the rectangle,
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* <code>false</code> otherwise.
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*/
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public boolean contains(int x, int y)
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{
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return (x >= this.x && x <= this.x + this.width
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&& y >= this.y && y <= this.y + this.height);
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}
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public boolean contains(int x, int y, int w, int h)
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{
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return (x >= this.x && x + w <= this.x + this.width
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&& y >= this.y && y + h <= this.y + this.height);
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}
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/**
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* Tests whether or not the specified point is inside this rectangle.
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*
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* @param point The point to test.
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*
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* @return <code>true</code> if the point is inside the rectangle,
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* <code>false</code> otherwise.
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*/
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public boolean contains(Point p)
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{
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return contains(p.x, p.y);
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}
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public boolean contains(Rectangle r)
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{
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return contains(r.x, r.y, r.width, r.height);
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}
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/**
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* Tests this rectangle for equality against the specified object. This
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* will be true if an only if the specified object:
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* <p>
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* <ul>
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* <li>Is not <code>null</code>.
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* <li>Is an instance of <code>Rectangle</code>.
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* <li>Has X and Y coordinates identical to this rectangle.
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* <li>Has a width and height identical to this rectangle.
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* </ul>
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*
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* @param obj The object to test against for equality.
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*
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* @return <code>true</code> if the specified object is equal to this one,
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* <code>false</code> otherwise.
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*/
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public boolean equals(Object obj)
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{
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if (obj instanceof Rectangle)
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{
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Rectangle r = (Rectangle) obj;
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return (r.x == x
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&& r.y == y
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&& r.width == width
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&& r.height == height);
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}
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return false;
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}
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public double getHeight()
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{
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return (double) this.height;
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}
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/**
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* Returns the location of this rectangle, which is the coordinates of
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* its upper left corner.
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*
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* @return The point where this rectangle is located.
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*/
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public Point getLocation()
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{
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return new Point(x,y);
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}
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/**
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* Returns the size of this rectangle.
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*
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* @return The size of this rectangle.
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*/
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public Dimension getSize()
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{
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return new Dimension(width, height);
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}
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public double getWidth()
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{
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return (double) this.width;
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}
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public double getX()
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{
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return (double) x;
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}
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public double getY()
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{
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return (double) y;
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}
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/**
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* Expands the rectangle by the specified amount. The horizontal
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* and vertical expansion values are applied both to the X,Y coordinate
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* of this rectangle, and its width and height. Thus the width and
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* height will increase by 2h and 2v accordingly.
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*
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* @param h The horizontal expansion value.
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* @param v The vertical expansion value.
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*/
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public void grow(int h, int v)
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{
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width += h;
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height += v;
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}
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/**
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* Tests whether or not the specified point is inside this rectangle.
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*
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* @param x The X coordinate of the point to test.
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* @param y The Y coordinate of the point to test.
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*
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* @return <code>true</code> if the point is inside the rectangle,
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* <code>false</code> otherwise.
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*
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* @deprecated This method is deprecated in favor of
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* <code>contains(int, int)</code>.
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*/
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public boolean inside(int x, int y)
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{
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return contains(x, y);
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}
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/**
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* Determines the rectange which is formed by the intersection of this
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* rectangle with the specified rectangle.
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*
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* @param rect The rectange to calculate the intersection with.
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*
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* @return The rectangle bounding the intersection.
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*
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* @specnote If there is no intersection, an empty rectangle at 0,0
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* is returned.
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*/
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public Rectangle intersection(Rectangle r)
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{
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int newx = x < r.x ? r.x : x;
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int newy = y < r.y ? r.y : y;
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int neww = (x + width < r.x + r.width ?
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x + width : r.x + r.width) - newx;
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int newh = (y + height < r.y + r.height ?
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y + height : r.y + r.height) - newy;
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if (neww >= 0 && newh >= 0)
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return new Rectangle(newx, newy, neww, newh);
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else
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return new Rectangle(0, 0, 0, 0);
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}
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/**
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* Tests whether or not the specified rectangle intersects this rectangle.
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*
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* @param rect The rectangle to test against.
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*
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* @return <code>true</code> if the specified rectangle intersects this
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* one, <code>false</code> otherwise.
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*
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* @specnote If the intersection is at an edge or corner only (an empty
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* intersection with a non-zero location), false is returned.
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*/
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public boolean intersects(Rectangle r)
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{
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int neww = (x + width < r.x + r.width ?
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x + width : r.x + r.width) - (x < r.x ? r.x : x);
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int newh = (y + height < r.y + r.height ?
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y + height : r.y + r.height) - (y < r.y ? r.y : y);
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return (neww > 0 && newh > 0);
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}
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/**
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* Tests whether or not this rectangle is empty. An empty rectangle
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* has a width or height of zero.
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*
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* @return <code>true</code> if the rectangle is empty, <code>false</code>
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* otherwise.
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*/
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public boolean isEmpty()
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{
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return !(width > 0 && height > 0);
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}
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/**
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* Moves the location of this rectangle by setting its upper left
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* corner to the specified coordinates.
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* // FIXME: Is this true?
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*
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* @param x The new X coordinate for this rectangle.
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* @param y The new Y coordinate for this rectangle.
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*
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* @deprecated This method is deprecated in favor of
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* <code>setLocation(int, int)</code>.
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*/
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public void move(int x, int y)
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{
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setLocation(x, y);
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}
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public int outcode(double x, double y)
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{
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// FIXME
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return 0;
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}
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/**
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* Updates this rectangle to have the specified dimensions.
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*
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* @param x The new X coordinate of the upper left hand corner.
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* @param y The new Y coordinate of the upper left hand corner.
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* @param width The new width of this rectangle.
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* @param height The new height of this rectangle.
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*
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* @deprecated This method is deprecated in favor of
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* <code>setBounds(int, int, int, int)</code>.
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*/
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public void reshape(int x, int y, int width, int height)
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{
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setBounds(x, y, width, height);
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}
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/**
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* Sets the size of this rectangle based on the specified dimensions.
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*
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* @param width The new width of the rectangle.
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* @param height The new height of the rectangle.
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*
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* @deprecated This method is deprecated in favor of
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* <code>setSize(int, int)</code>.
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*/
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public void resize(int width, int height)
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{
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setSize(width, height);
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}
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/**
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* Updates this rectangle to have the specified dimensions.
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*
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* @param x The new X coordinate of the upper left hand corner.
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* @param y The new Y coordinate of the upper left hand corner.
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* @param width The new width of this rectangle.
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* @param height The new height of this rectangle.
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*/
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public void setBounds(int x, int y, int width, int height)
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{
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this.x = x;
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this.y = y;
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this.width = width;
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this.height = height;
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}
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/**
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* Updates this rectangle to match the dimensions of the specified
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* rectangle.
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*
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* @param rect The rectangle to update from.
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*/
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public void setBounds(Rectangle r)
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{
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this.x = r.x;
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this.y = r.y;
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this.width = r.width;
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this.height = r.height;
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}
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/**
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* Moves the location of this rectangle by setting its upper left
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* corner to the specified coordinates.
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* // FIXME: Is this true?
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*
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* @param x The new X coordinate for this rectangle.
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* @param y The new Y coordinate for this rectangle.
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*/
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public void setLocation(int x, int y)
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{
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this.x = x;
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this.y = y;
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}
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/**
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* Moves the location of this rectangle by setting its upper left
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* corner to the specified point.
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* // FIXME: Is this true?
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*
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* @param point The point to move the rectange to.
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*/
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public void setLocation(Point p)
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{
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this.x = p.x;
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this.y = p.y;
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}
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public void setRect(double x, double y, double width, double height)
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{
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this.x = (int) x;
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this.y = (int) y;
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this.width = (int) width;
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this.height = (int) height;
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}
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/**
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* Sets the size of this rectangle based on the specified dimensions.
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*
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* @param dim The new dimensions of the rectangle.
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*/
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public void setSize(Dimension d)
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{
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this.width = d.width;
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this.height = d.height;
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}
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/**
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* Sets the size of this rectangle based on the specified dimensions.
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*
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|
* @param width The new width of the rectangle.
|
|
* @param height The new height of the rectangle.
|
|
*/
|
|
public void setSize(int width, int height)
|
|
{
|
|
this.width = width;
|
|
this.height = height;
|
|
}
|
|
|
|
public void translate(int x, int y)
|
|
{
|
|
x += x;
|
|
y += y;
|
|
}
|
|
|
|
/**
|
|
* Returns the smallest rectangle that contains both this rectangle
|
|
* and the specified rectangle.
|
|
*
|
|
* @param rect The rectangle to compute the union with.
|
|
*
|
|
* @return The smallest rectangle containing both rectangles.
|
|
*/
|
|
public Rectangle union(Rectangle r)
|
|
{
|
|
int newx = x > r.x ? r.x : x;
|
|
int newy = y > r.y ? r.y : y;
|
|
int neww = (this.x + width > r.x + r.width ?
|
|
this.x + width : r.x + r.width) - newx;
|
|
int newh = (this.y + height > r.y + r.height ?
|
|
this.y + height : r.y + r.height) - newy;
|
|
return new Rectangle(newx, newy, neww, newh);
|
|
}
|
|
|
|
// Commented out until we have Rectangle2D
|
|
public Rectangle2D createIntersection(Rectangle2D r)
|
|
{
|
|
// FIXME: maybe we should consider returning a Rectangle or
|
|
// Rectangle2D.Float depending on type of R.
|
|
Rectangle2D.Double res = new Rectangle2D.Double ();
|
|
intersect (this, r, res);
|
|
return res;
|
|
}
|
|
|
|
public Rectangle2D createUnion(Rectangle2D r)
|
|
{
|
|
// FIXME: maybe we should consider returning a Rectangle or
|
|
// Rectangle2D.Float depending on type of R.
|
|
Rectangle2D.Double res = new Rectangle2D.Double ();
|
|
union (this, r, res);
|
|
return res;
|
|
}
|
|
|
|
public Rectangle2D getBounds2D()
|
|
{
|
|
return new Rectangle (x, y, width, height);
|
|
}
|
|
|
|
/**
|
|
* Returns a string representation of this rectangle.
|
|
*
|
|
* @return A string representation of this rectangle.
|
|
*/
|
|
public String toString()
|
|
{
|
|
return getClass().getName() + "[x=" + x + ",y=" + y + ",width=" + width +
|
|
",height=" + height + "]";
|
|
}
|
|
|
|
/**
|
|
* Returns a hash value for this object.
|
|
*
|
|
* @return A hash value for this object.
|
|
*/
|
|
public int hashCode()
|
|
{
|
|
return x * y * width * height * 37;
|
|
}
|
|
}
|