eu.etaxonomy.taxeditor.navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/navigator/TreeNodeDragListener.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2015 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10 package eu.etaxonomy.taxeditor.navigation.navigator;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14
  15 import org.eclipse.jface.viewers.IStructuredSelection;
  16 import org.eclipse.jface.viewers.Viewer;
  17 import org.eclipse.swt.dnd.DragSourceAdapter;
  18 import org.eclipse.swt.dnd.DragSourceEvent;
  19 import org.eclipse.ui.navigator.CommonViewer;
  20
  21
  22 import eu.etaxonomy.cdm.model.common.DefinedTermBase;
  23 import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;
  24 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  25 import eu.etaxonomy.taxeditor.dnd.transfer.TaxonNodeTransfer;
  26 import eu.etaxonomy.taxeditor.editor.definedterm.TermTransfer;
  27
  28 /**
  29  * @author k.luther
  30  * @date 02.06.2015
  31  *
  32  */
  33 public class TreeNodeDragListener extends DragSourceAdapter {
  34         private CommonViewer viewer;
  35
  36         /**
  37          *
  38          */
  39         public TreeNodeDragListener(CommonViewer viewer) {
  40                 this.viewer = viewer;
  41         }
  42
  43
  44         public void setViewer(CommonViewer viewer){
  45                 this.viewer = viewer;
  46         }
  47         /* (non-Javadoc)
  48          * @see org.eclipse.swt.dnd.DragSourceAdapter#dragStart(org.eclipse.swt.dnd.DragSourceEvent)
  49          */
  50         @Override
  51         public void dragStart(DragSourceEvent event) {
  52
  53                 event.doit = true;// set to false if needed - default is true
  54         }
  55
  56         /* (non-Javadoc)
  57          * @see org.eclipse.swt.dnd.DragSourceAdapter#dragFinished(org.eclipse.swt.dnd.DragSourceEvent)
  58          */
  59         @Override
  60         public void dragFinished(DragSourceEvent event) {
  61                 // TODO Auto-generated method stub
  62                 super.dragFinished(event);
  63         }
  64
  65         /* (non-Javadoc)
  66          * @see org.eclipse.swt.dnd.DragSourceAdapter#dragSetData(org.eclipse.swt.dnd.DragSourceEvent)
  67          */
  68         @Override
  69         public void dragSetData(DragSourceEvent event) {
  70
  71                 IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
  72                 List<ITaxonTreeNode> taxonNodes = new ArrayList<ITaxonTreeNode>();
  73
  74                 for (Object object : selection.toList()){
  75                         taxonNodes.add((ITaxonTreeNode)object);
  76                         }
  77
  78                 if (TaxonNodeTransfer.getInstance().isSupportedType(
  79                                 event.dataType)) {
  80                         event.data = taxonNodes.toArray(new TaxonNode[taxonNodes.size()]);
  81                 }
  82         }
  83 }