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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2014 IBM Corporation, Ericsson
   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  *
   8  * Contributors:
   9  *     IBM - Initial API and implementation
  10  *     Bernd Hufmann - Updated for TMF
  11  **********************************************************************/
  12
  13 package org.eclipse.tracecompass.tmf.ui.views.uml2sd;
  14
  15 import java.util.ArrayList;
  16 import java.util.List;
  17
  18 import org.eclipse.jface.viewers.ISelection;
  19 import org.eclipse.jface.viewers.ISelectionChangedListener;
  20 import org.eclipse.jface.viewers.ISelectionProvider;
  21 import org.eclipse.jface.viewers.SelectionChangedEvent;
  22
  23 /**
  24  * <p>
  25  * Informs all registered listeners of graph node selection change in the Frame.
  26  * </p>
  27  *
  28  * @version 1.0
  29  * @author sveyrier
  30  */
  31 public class SDWidgetSelectionProvider implements ISelectionProvider {
  32
  33     // ------------------------------------------------------------------------
  34     // Attributes
  35     // ------------------------------------------------------------------------
  36
  37     /**
  38      * The listener list
  39      */
  40     private List<ISelectionChangedListener> fListenerList = null;
  41
  42     /**
  43      * The current selection
  44      */
  45     private ISelection fCurrentSelection = null;
  46
  47     // ------------------------------------------------------------------------
  48     // Constructor
  49     // ------------------------------------------------------------------------
  50
  51     /**
  52      * Standard constructor
  53      */
  54     protected SDWidgetSelectionProvider() {
  55         fListenerList = new ArrayList<>();
  56     }
  57
  58     // ------------------------------------------------------------------------
  59     // Methods
  60     // ------------------------------------------------------------------------
  61
  62     @Override
  63     public void addSelectionChangedListener(ISelectionChangedListener listener) {
  64         if (!fListenerList.contains(listener)) {
  65             fListenerList.add(listener);
  66         }
  67     }
  68
  69     @Override
  70     public void removeSelectionChangedListener(ISelectionChangedListener listener) {
  71         fListenerList.remove(listener);
  72     }
  73
  74     @Override
  75     public void setSelection(ISelection selection) {
  76         fCurrentSelection = selection;
  77         for (int i = 0; i < fListenerList.size(); i++) {
  78             ISelectionChangedListener list = fListenerList.get(i);
  79             list.selectionChanged(new SelectionChangedEvent(this, fCurrentSelection));
  80         }
  81     }
  82
  83     @Override
  84     public ISelection getSelection() {
  85         return fCurrentSelection;
  86     }
  87
  88 }