eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/DescriptionElementDragListener.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 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
  11 package eu.etaxonomy.taxeditor.editor.view.descriptive;
  12
  13 import java.util.ArrayList;
  14 import java.util.List;
  15
  16 import org.eclipse.jface.viewers.IStructuredSelection;
  17 import org.eclipse.swt.dnd.DND;
  18 import org.eclipse.swt.dnd.DragSourceAdapter;
  19 import org.eclipse.swt.dnd.DragSourceEvent;
  20
  21 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  22 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  23 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  24 import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;
  25
  26 /**
  27  * @author n.hoffmann
  28  * @created Feb 8, 2011
  29  * @version 1.0
  30  */
  31 public class DescriptionElementDragListener extends DragSourceAdapter {
  32
  33         private DescriptiveViewPart part;
  34         private DescriptionBase description;
  35
  36         public DescriptionElementDragListener(DescriptiveViewPart part){
  37                 this.part = part;
  38         }
  39
  40         /**
  41          * Method declared on DragSourceListener
  42          */
  43         public void dragFinished(DragSourceEvent event) {
  44                 if (!event.doit)
  45                         return;
  46                 // FIXME what to do here?
  47                 if (event.detail != DND.DROP_NONE) {
  48                         //IStructuredSelection selection = (IStructuredSelection) part.getViewer().getSelection();
  49                         part.getViewer().refresh();
  50
  51                 part.changed(null);
  52                 }
  53         }
  54
  55         /**
  56          * Method declared on DragSourceListener
  57          */
  58         public void dragSetData(DragSourceEvent event) {
  59                 IStructuredSelection selection = (IStructuredSelection) part.getViewer()
  60                                 .getSelection();
  61                 List<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
  62                 for (Object object : selection.toList()){
  63                         if(object instanceof DescriptionBase){
  64                                 if (!((DescriptionBase) object).getElements().isEmpty()){
  65                                         descriptionElements.addAll(((DescriptionBase) object).getElements());
  66                                 }
  67                                 description = HibernateProxyHelper.deproxy(object, DescriptionBase.class);
  68
  69                         }else if(object instanceof FeatureNodeContainer){
  70                                 descriptionElements.addAll(((FeatureNodeContainer) object).getDescriptionElements());
  71                         }else if(object instanceof DescriptionElementBase){
  72                                 descriptionElements.add((DescriptionElementBase)object);
  73                         }
  74
  75                 }
  76                 if (DescriptionElementTransfer.getInstance().isSupportedType(
  77                                 event.dataType)) {
  78                         if (!descriptionElements.isEmpty()){
  79                                 event.data = descriptionElements.toArray(new DescriptionElementBase[descriptionElements.size()]);
  80                         }
  81
  82                 }
  83
  84         }
  85
  86         /**
  87          * Method declared on DragSourceListener
  88          */
  89         public void dragStart(DragSourceEvent event) {
  90                 event.doit = !part.getViewer().getSelection().isEmpty();
  91         }
  92
  93 }