libjava/java/awt/Insets.java

   1 /* Insets.java -- information about a container border
   2    Copyright (C) 1999, 2000, 2002, 2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package java.awt;
  40
  41 import java.io.Serializable;
  42
  43 /**
  44  * This class represents the "margin" or space around a container.
  45  *
  46  * @author Aaron M. Renn (arenn@urbanophile.com)
  47  * @author Eric Blake (ebb9@email.byu.edu)
  48  * @status
  49  */
  50 public class Insets implements Cloneable, Serializable
  51 {
  52   /**
  53    * Compatible with JDK 1.0+.
  54    */
  55   private static final long serialVersionUID = -2272572637695466749L;
  56
  57   /**
  58    * The gap from the top.
  59    *
  60    * @serial the top inset
  61    */
  62   public int top;
  63
  64   /**
  65    * The gap from the left.
  66    *
  67    * @serial the left inset
  68    */
  69   public int left;
  70
  71   /**
  72    * The gap from the bottom.
  73    *
  74    * @serial the bottom inset
  75    */
  76   public int bottom;
  77
  78   /**
  79    * The gap from the right.
  80    *
  81    * @serial the right inset
  82    */
  83   public int right;
  84
  85   /**
  86    * Initializes a new instance of <code>Inset</code> with the specified
  87    * inset values.
  88    *
  89    * @param top the top inset
  90    * @param left the left inset
  91    * @param bottom the bottom inset
  92    * @param right the right inset
  93    */
  94   public Insets(int top, int left, int bottom, int right)
  95   {
  96     this.top = top;
  97     this.left = left;
  98     this.bottom = bottom;
  99     this.right = right;
 100   }
 101
 102   /**
 103    * Tests whether this object is equal to the specified object. The other
 104    * object must be an instance of Insets with identical field values.
 105    *
 106    * @param obj the object to test against
 107    * @return true if the specified object is equal to this one
 108    */
 109   public boolean equals(Object obj)
 110   {
 111     if (! (obj instanceof Insets))
 112       return false;
 113     Insets i = (Insets) obj;
 114     return top == i.top && bottom == i.bottom
 115       && left == i.left && right == i.right;
 116   }
 117
 118   /**
 119    * Returns a hashcode for this instance. The formula is unspecified, but
 120    * appears to be <code>XXX what is it? </code>.
 121    *
 122    * @return the hashcode
 123    */
 124   public int hashCode()
 125   {
 126     // This can't be right...
 127     return top + bottom + left + right;
 128   }
 129
 130   /**
 131    * Returns a string representation of this object, which will be non-null.
 132    * The format is unspecified, but appears to be <code>XXX what is it?</code>.
 133    *
 134    * @return a string representation of this object
 135    */
 136   public String toString()
 137   {
 138     return getClass().getName() + "(top=" + top + ",bottom=" + bottom +
 139       ",left=" + left + ",right=" + right + ')';
 140   }
 141
 142   /**
 143    * Returns a copy of this object.
 144    *
 145    * @return a copy of this object
 146    */
 147   public Object clone()
 148   {
 149     try
 150       {
 151         return super.clone();
 152       }
 153     catch (CloneNotSupportedException e)
 154       {
 155         throw (Error) new InternalError().initCause(e); // Impossible
 156       }
 157   }
 158 } // class Insets