| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| |
| import org.eclipse.swt.internal.SerializableCompatibility; |
| |
| /** |
| * Instances of this class represent places on the (x, y) |
| * coordinate plane. |
| * <p> |
| * The coordinate space for rectangles and points is considered |
| * to have increasing values downward and to the right from its |
| * origin making this the normal, computer graphics oriented notion |
| * of (x, y) coordinates rather than the strict mathematical one. |
| * </p> |
| * <p> |
| * The hashCode() method in this class uses the values of the public |
| * fields to compute the hash value. When storing instances of the |
| * class in hashed collections, do not modify these fields after the |
| * object has been inserted. |
| * </p> |
| * <p> |
| * Application code does <em>not</em> need to explicitly release the |
| * resources managed by each instance when those instances are no longer |
| * required, and thus no <code>dispose()</code> method is provided. |
| * </p> |
| * |
| * @see Rectangle |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| */ |
| |
| public final class Point implements SerializableCompatibility { |
| |
| /** |
| * the x coordinate of the point |
| */ |
| public int x; |
| |
| /** |
| * the y coordinate of the point |
| */ |
| public int y; |
| |
| static final long serialVersionUID = 3257002163938146354L; |
| |
| /** |
| * Constructs a new point with the given x and y coordinates. |
| * |
| * @param x the x coordinate of the new point |
| * @param y the y coordinate of the new point |
| */ |
| public Point (int x, int y) { |
| this.x = x; |
| this.y = y; |
| } |
| |
| /** |
| * Compares the argument to the receiver, and returns true |
| * if they represent the <em>same</em> object using a class |
| * specific comparison. |
| * |
| * @param object the object to compare with this object |
| * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise |
| * |
| * @see #hashCode() |
| */ |
| public boolean equals (Object object) { |
| if (object == this) return true; |
| if (!(object instanceof Point)) return false; |
| Point p = (Point)object; |
| return (p.x == this.x) && (p.y == this.y); |
| } |
| |
| /** |
| * Returns an integer hash code for the receiver. Any two |
| * objects that return <code>true</code> when passed to |
| * <code>equals</code> must return the same value for this |
| * method. |
| * |
| * @return the receiver's hash |
| * |
| * @see #equals(Object) |
| */ |
| public int hashCode () { |
| return x ^ y; |
| } |
| |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the point |
| */ |
| public String toString () { |
| return "Point {" + x + ", " + y + "}"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| } |
| |