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

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