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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2012 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.linuxtools.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     protected List<ISelectionChangedListener> fListenerList = null;
  41     /**
  42      * The current selection
  43      */
  44     protected ISelection fCurrentSelection = null;
  45
  46     // ------------------------------------------------------------------------
  47     // Constructor
  48     // ------------------------------------------------------------------------
  49     /**
  50      * Standard constructor
  51      */
  52     protected SDWidgetSelectionProvider() {
  53         fListenerList = new ArrayList<ISelectionChangedListener>();
  54     }
  55
  56     // ------------------------------------------------------------------------
  57     // Methods
  58     // ------------------------------------------------------------------------
  59
  60     /*
  61      * (non-Javadoc)
  62      * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
  63      */
  64     @Override
  65     public void addSelectionChangedListener(ISelectionChangedListener listener) {
  66         if (!fListenerList.contains(listener)) {
  67             fListenerList.add(listener);
  68         }
  69     }
  70
  71     /*
  72      * (non-Javadoc)
  73      * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
  74      */
  75     @Override
  76     public void removeSelectionChangedListener(ISelectionChangedListener listener) {
  77         fListenerList.remove(listener);
  78     }
  79
  80     /*
  81      * (non-Javadoc)
  82      * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
  83      */
  84     @Override
  85     public void setSelection(ISelection selection) {
  86         fCurrentSelection = selection;
  87         for (int i = 0; i < fListenerList.size(); i++) {
  88             ISelectionChangedListener list = fListenerList.get(i);
  89             list.selectionChanged(new SelectionChangedEvent(this, fCurrentSelection));
  90         }
  91     }
  92
  93     /*
  94      * (non-Javadoc)
  95      * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
  96      */
  97     @Override
  98     public ISelection getSelection() {
  99         return fCurrentSelection;
 100     }
 101
 102 }