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