eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/SimpleSelectionProvider.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.editor;
  11
  12 import org.apache.log4j.Logger;
  13 import org.eclipse.core.runtime.ListenerList;
  14 import org.eclipse.jface.viewers.ISelection;
  15 import org.eclipse.jface.viewers.ISelectionChangedListener;
  16 import org.eclipse.jface.viewers.ISelectionProvider;
  17 import org.eclipse.jface.viewers.SelectionChangedEvent;
  18
  19 /**
  20  * @author p.ciardelli
  21  * @created 16.05.2008
  22  * @version 1.0
  23  */
  24 public class SimpleSelectionProvider implements ISelectionProvider {
  25         private static final Logger logger = Logger
  26                         .getLogger(SimpleSelectionProvider.class);
  27
  28         private ListenerList listeners = new ListenerList();
  29         private ISelection selection;
  30
  31         public void addSelectionChangedListener(
  32                         ISelectionChangedListener listener) {
  33                 listeners.add(listener);
  34         }
  35
  36         public ISelection getSelection() {
  37                 if (selection != null)
  38                         return selection;
  39                 return null;
  40         }
  41
  42         public void removeSelectionChangedListener(
  43                         ISelectionChangedListener listener) {
  44                 listeners.remove(listener);
  45         }
  46
  47         public void setSelection(ISelection selection) {
  48                 this.selection = selection;
  49                 fireSelectionChanged();
  50         }
  51
  52         private void fireSelectionChanged() {
  53
  54                 SelectionChangedEvent event = new SelectionChangedEvent(this, selection);
  55
  56                 for (Object listener : listeners.getListeners()) {
  57                          if (listener instanceof ISelectionChangedListener) {
  58                                  ((ISelectionChangedListener)listener).selectionChanged(event);
  59                          }
  60                 }
  61         }
  62
  63 }