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 package eu.etaxonomy.taxeditor.editor.view.descriptive;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13
  14 import org.eclipse.jface.viewers.IStructuredSelection;
  15 import org.eclipse.swt.dnd.DND;
  16 import org.eclipse.swt.dnd.DragSourceAdapter;
  17 import org.eclipse.swt.dnd.DragSourceEvent;
  18
  19 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  20 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  21 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  22 import eu.etaxonomy.taxeditor.editor.view.descriptive.e4.FactualDataPartE4;
  23 import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;
  24
  25 /**
  26  * @author n.hoffmann
  27  * @created Feb 8, 2011
  28  */
  29 public class DescriptionElementDragListener extends DragSourceAdapter {
  30
  31         private FactualDataPartE4 part;
  32         private DescriptionBase<?> description;
  33
  34         public DescriptionElementDragListener(FactualDataPartE4 part){
  35                 this.part = part;
  36         }
  37
  38         /**
  39          * Method declared on DragSourceListener
  40          */
  41         @Override
  42     public void dragFinished(DragSourceEvent event) {
  43                 if (!event.doit) {
  44             return;
  45         }
  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         @Override
  59     public void dragSetData(DragSourceEvent event) {
  60                 IStructuredSelection selection = (IStructuredSelection) part.getViewer()
  61                                 .getSelection();
  62                 List<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
  63                 for (Object object : selection.toList()){
  64                         if(object instanceof DescriptionBase){
  65                                 if (!((DescriptionBase) object).getElements().isEmpty()){
  66                                         descriptionElements.addAll(((DescriptionBase) object).getElements());
  67                                 }
  68                                 description = HibernateProxyHelper.deproxy(object, DescriptionBase.class);
  69
  70                         }else if(object instanceof FeatureNodeContainer){
  71                                 descriptionElements.addAll(((FeatureNodeContainer) object).getDescriptionElements());
  72                         }else if(object instanceof DescriptionElementBase){
  73                                 descriptionElements.add((DescriptionElementBase)object);
  74                         }
  75
  76                 }
  77                 if (DescriptionElementTransfer.getInstance().isSupportedType(
  78                                 event.dataType)) {
  79                         if (!descriptionElements.isEmpty()){
  80                                 event.data = descriptionElements.toArray(new DescriptionElementBase[descriptionElements.size()]);
  81                         }
  82
  83                 }
  84         }
  85
  86         /**
  87          * Method declared on DragSourceListener
  88          */
  89         @Override
  90     public void dragStart(DragSourceEvent event) {
  91                 event.doit = !part.getViewer().getSelection().isEmpty();
  92         }
  93 }