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.editor.view.descriptive.e4.FactualDataPartE4;
  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 FactualDataPartE4 part;
  34         private DescriptionBase description;
  35
  36         public DescriptionElementDragListener(FactualDataPartE4 part){
  37                 this.part = part;
  38         }
  39
  40         /**
  41          * Method declared on DragSourceListener
  42          */
  43         @Override
  44     public void dragFinished(DragSourceEvent event) {
  45                 if (!event.doit) {
  46             return;
  47         }
  48                 // FIXME what to do here?
  49                 if (event.detail != DND.DROP_NONE) {
  50                         //IStructuredSelection selection = (IStructuredSelection) part.getViewer().getSelection();
  51                         part.getViewer().refresh();
  52
  53                 part.changed(null);
  54                 }
  55         }
  56
  57         /**
  58          * Method declared on DragSourceListener
  59          */
  60         @Override
  61     public void dragSetData(DragSourceEvent event) {
  62                 IStructuredSelection selection = (IStructuredSelection) part.getViewer()
  63                                 .getSelection();
  64                 List<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
  65                 for (Object object : selection.toList()){
  66                         if(object instanceof DescriptionBase){
  67                                 if (!((DescriptionBase) object).getElements().isEmpty()){
  68                                         descriptionElements.addAll(((DescriptionBase) object).getElements());
  69                                 }
  70                                 description = HibernateProxyHelper.deproxy(object, DescriptionBase.class);
  71
  72                         }else if(object instanceof FeatureNodeContainer){
  73                                 descriptionElements.addAll(((FeatureNodeContainer) object).getDescriptionElements());
  74                         }else if(object instanceof DescriptionElementBase){
  75                                 descriptionElements.add((DescriptionElementBase)object);
  76                         }
  77
  78                 }
  79                 if (DescriptionElementTransfer.getInstance().isSupportedType(
  80                                 event.dataType)) {
  81                         if (!descriptionElements.isEmpty()){
  82                                 event.data = descriptionElements.toArray(new DescriptionElementBase[descriptionElements.size()]);
  83                         }
  84
  85                 }
  86
  87         }
  88
  89         /**
  90          * Method declared on DragSourceListener
  91          */
  92         @Override
  93     public void dragStart(DragSourceEvent event) {
  94                 event.doit = !part.getViewer().getSelection().isEmpty();
  95         }
  96
  97 }