libjava/javax/swing/DefaultSingleSelectionModel.java

   1 /* DefaultSingleSelectionModel.java --
   2    Copyright (C) 2002 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 package javax.swing;
  39
  40 // Imports
  41 import java.io.*;
  42 import java.util.*;
  43 import javax.swing.event.*;
  44
  45 /**
  46  * DefaultSingleSelectionModel
  47  * @author      Andrew Selkirk
  48  * @version     1.0
  49  */
  50 public class DefaultSingleSelectionModel implements
  51                 SingleSelectionModel, Serializable {
  52
  53         //-------------------------------------------------------------
  54         // Variables --------------------------------------------------
  55         //-------------------------------------------------------------
  56
  57         /**
  58          * changeEvent
  59          */
  60         protected transient ChangeEvent changeEvent = new ChangeEvent(this);
  61
  62         /**
  63          * listenerList
  64          */
  65         protected EventListenerList listenerList= new EventListenerList();
  66
  67         /**
  68          * index
  69          */
  70         private int index = -1;
  71
  72
  73         //-------------------------------------------------------------
  74         // Initialization ---------------------------------------------
  75         //-------------------------------------------------------------
  76
  77         /**
  78          * Constructor DefaultSingleSelectionModel
  79          */
  80         public DefaultSingleSelectionModel() {
  81                 // TODO
  82         } // DefaultSingleSelectionModel()
  83
  84
  85         //-------------------------------------------------------------
  86         // Methods ----------------------------------------------------
  87         //-------------------------------------------------------------
  88
  89         /**
  90          * getSelectedIndex
  91          * @returns int
  92          */
  93         public int getSelectedIndex() {
  94                 return index;
  95         } // getSelectedIndex()
  96
  97         /**
  98          * setSelectedIndex
  99          * @param index TODO
 100          */
 101         public void setSelectedIndex(int index) {
 102
 103                 // Set Data
 104                 this.index = index;
 105
 106                 // Notify Listeners
 107                 fireStateChanged();
 108
 109         } // setSelectedIndex()
 110
 111         /**
 112          * clearSelection
 113          */
 114         public void clearSelection() {
 115
 116                 // Set Data
 117                 index = -1;
 118
 119                 // Notify Listeners
 120                 fireStateChanged();
 121
 122         } // clearSelection()
 123
 124         /**
 125          * isSelected
 126          * @returns boolean
 127          */
 128         public boolean isSelected() {
 129                 return (index == -1);
 130         } // isSelected()
 131
 132         /**
 133          * addChangeListener
 134          * @param listener TODO
 135          */
 136         public void addChangeListener(ChangeListener listener) {
 137                 listenerList.add(ChangeListener.class, listener);
 138         } // addChangeListener()
 139
 140         /**
 141          * removeChangeListener
 142          * @param listener TODO
 143          */
 144         public void removeChangeListener(ChangeListener listener) {
 145                 listenerList.remove(ChangeListener.class, listener);
 146         } // removeChangeListener()
 147
 148         /**
 149          * fireStateChanged
 150          */
 151         protected void fireStateChanged() {
 152
 153                 // Variables
 154                 ChangeListener  listener;
 155                 EventListener[] listeners;
 156                 int                             index;
 157
 158                 // Get Listeners
 159                 listeners = listenerList.getListeners(ChangeListener.class);
 160
 161                 // Process Listeners
 162                 for (index = 0; index < listeners.length; index++) {
 163                         listener = (ChangeListener) listeners[index];
 164                         listener.stateChanged(changeEvent);
 165                 } // for
 166
 167         } // fireStateChanged()
 168
 169         /**
 170          * getListeners
 171          * @param listenerClass TODO
 172          * @returns EventListener[]
 173          */
 174         public EventListener[] getListeners(Class listenerClass) {
 175                 return listenerList.getListeners(listenerClass);
 176         } // getListeners()
 177
 178         /**
 179          * getChangeListeners
 180          */
 181         public ChangeListener[] getChangeListeners()
 182         {
 183           // FIXME: implement this
 184           return null;
 185         }
 186
 187
 188 } // DefaultSingleSelectionModel