Source for java.awt.Insets

   1: /* Insets.java -- information about a container border
   2:    Copyright (C) 1999, 2000, 2002, 2005, 2006  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., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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:    * Set the contents of this Insets object to the specified values.
 104:    *
 105:    * @param top the top inset
 106:    * @param left the left inset
 107:    * @param bottom the bottom inset
 108:    * @param right the right inset
 109:    *
 110:    * @since 1.5
 111:    */
 112:   public void set(int top, int left, int bottom, int right)
 113:   {
 114:     this.top = top;
 115:     this.left = left;
 116:     this.bottom = bottom;
 117:     this.right = right;
 118:   }
 119: 
 120:   /**
 121:    * Tests whether this object is equal to the specified object. The other
 122:    * object must be an instance of Insets with identical field values.
 123:    *
 124:    * @param obj the object to test against
 125:    * @return true if the specified object is equal to this one
 126:    *
 127:    * @since 1.1
 128:    */
 129:   public boolean equals(Object obj)
 130:   {
 131:     if (! (obj instanceof Insets))
 132:       return false;
 133:     Insets i = (Insets) obj;
 134:     return top == i.top && bottom == i.bottom
 135:       && left == i.left && right == i.right;
 136:   }
 137: 
 138:   /**
 139:    * Returns a hashcode for this instance. The formula is unspecified, but
 140:    * appears to be <code>XXX what is it? </code>.
 141:    *
 142:    * @return the hashcode
 143:    */
 144:   public int hashCode()
 145:   {
 146:     // This can't be right...
 147:     return top + bottom + left + right;
 148:   }
 149: 
 150:   /**
 151:    * Returns a string representation of this object, which will be non-null.
 152:    *
 153:    * @return a string representation of this object
 154:    */
 155:   public String toString()
 156:   {
 157:     return getClass().getName() + "[top=" + top + ",left=" + left
 158:       + ",bottom=" + bottom + ",right=" + right + ']';
 159:   }
 160: 
 161:   /**
 162:    * Returns a copy of this object.
 163:    *
 164:    * @return a copy of this object
 165:    */
 166:   public Object clone()
 167:   {
 168:     try
 169:       {
 170:         return super.clone();
 171:       }
 172:     catch (CloneNotSupportedException e)
 173:       {
 174:         throw (Error) new InternalError().initCause(e); // Impossible
 175:       }
 176:   }
 177: } // class Insets