org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/uml2sd/SDWidgetSelectionProvider.java

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2008, 2011 IBM Corporation and others.
   3  * All rights reserved.   This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  * $Id: SDWidgetSelectionProvider.java,v 1.3 2008/01/24 02:29:01 apnan Exp $
   8  *
   9  * Contributors:
  10  * IBM - Initial API and implementation
  11  * Bernd Hufmann - Updated for TMF
  12  **********************************************************************/
  13 package org.eclipse.linuxtools.tmf.ui.views.uml2sd;
  14
  15 import java.util.ArrayList;
  16
  17 import org.eclipse.jface.viewers.ISelection;
  18 import org.eclipse.jface.viewers.ISelectionChangedListener;
  19 import org.eclipse.jface.viewers.ISelectionProvider;
  20 import org.eclipse.jface.viewers.SelectionChangedEvent;
  21
  22 /**
  23  * Informs all registered listeners of graph node selection change in the Frame
  24  *
  25  * @author sveyrier
  26  *
  27  */
  28 public class SDWidgetSelectionProvider implements ISelectionProvider {
  29
  30     /**
  31      * The listener list
  32      */
  33     protected ArrayList<ISelectionChangedListener> listenerList = null;
  34
  35     /**
  36      * The current selection
  37      */
  38     protected ISelection currentSelection = null;
  39
  40     protected SDWidgetSelectionProvider() {
  41         listenerList = new ArrayList<ISelectionChangedListener>();
  42     }
  43
  44     /**
  45      * Adds the given listener from the selection change listener list
  46      *
  47      * @param listener the listener to add
  48      */
  49     @Override
  50     public void addSelectionChangedListener(ISelectionChangedListener listener) {
  51         if (!listenerList.contains(listener))
  52             listenerList.add(listener);
  53     }
  54
  55     /**
  56      * Removes the given listener from the selection change listener list
  57      *
  58      * @param listener the listener to remove
  59      */
  60     @Override
  61     public void removeSelectionChangedListener(ISelectionChangedListener listener) {
  62         listenerList.remove(listener);
  63     }
  64
  65     /**
  66      * Changes the selection to the given selection and inform all listener
  67      *
  68      * @param selection the new current selection
  69      */
  70     @Override
  71     public void setSelection(ISelection selection) {
  72         currentSelection = selection;
  73         for (int i = 0; i < listenerList.size(); i++) {
  74             ISelectionChangedListener list = (ISelectionChangedListener) listenerList.get(i);
  75             list.selectionChanged(new SelectionChangedEvent(this, currentSelection));
  76         }
  77     }
  78
  79     /**
  80      * Returns the current selection
  81      *
  82      * @return the current selection
  83      */
  84     @Override
  85     public ISelection getSelection() {
  86         return currentSelection;
  87     }
  88
  89 }