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

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