1 /*
   2  * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * This source code is provided to illustrate the usage of a given feature
  28  * or technique and has been deliberately simplified. Additional steps
  29  * required for a production-quality application, such as security checks,
  30  * input validation and proper error handling, might not be present in
  31  * this sample code.
  32  */
  33 
  34 
  35 package com.sun.tools.example.debug.gui;
  36 
  37 import java.util.*;
  38 
  39 import javax.swing.AbstractListModel;
  40 
  41 public class MonitorListModel extends AbstractListModel {
  42 
  43     private final List<String> monitors = new ArrayList<String>();
  44 
  45     MonitorListModel(Environment env) {
  46 
  47         // Create listener.
  48         MonitorListListener listener = new MonitorListListener();
  49         env.getContextManager().addContextListener(listener);
  50 
  51         //### remove listeners on exit!
  52     }
  53 
  54     @Override
  55     public Object getElementAt(int index) {
  56         return monitors.get(index);
  57     }
  58 
  59     @Override
  60     public int getSize() {
  61         return monitors.size();
  62     }
  63 
  64     public void add(String expr) {
  65         monitors.add(expr);
  66         int newIndex = monitors.size()-1;  // order important
  67         fireIntervalAdded(this, newIndex, newIndex);
  68     }
  69 
  70     public void remove(String expr) {
  71         int index = monitors.indexOf(expr);
  72         remove(index);
  73     }
  74 
  75     public void remove(int index) {
  76         monitors.remove(index);
  77         fireIntervalRemoved(this, index, index);
  78     }
  79 
  80     public List<String> monitors() {
  81         return Collections.unmodifiableList(monitors);
  82     }
  83 
  84     public Iterator<?> iterator() {
  85         return monitors().iterator();
  86     }
  87 
  88     private void invalidate() {
  89         fireContentsChanged(this, 0, monitors.size()-1);
  90     }
  91 
  92     private class MonitorListListener implements ContextListener {
  93 
  94         @Override
  95         public void currentFrameChanged(final CurrentFrameChangedEvent e) {
  96             invalidate();
  97         }
  98     }
  99 }