eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/DefinedTermDragListener.java

   1 /**
   2 * Copyright (C) 2009 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.definedterm;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13
  14 import org.eclipse.jface.viewers.IStructuredSelection;
  15 import org.eclipse.jface.viewers.Viewer;
  16 import org.eclipse.swt.dnd.DragSourceAdapter;
  17 import org.eclipse.swt.dnd.DragSourceEvent;
  18
  19 import eu.etaxonomy.cdm.model.common.DefinedTermBase;
  20
  21 /**
  22  * @author l.morris
  23  * @date 10 Jan 2012
  24  *
  25  */
  26 public class DefinedTermDragListener extends DragSourceAdapter {
  27
  28         private Viewer viewer;
  29
  30         public DefinedTermDragListener(Viewer viewer) {
  31                 this.viewer = viewer;
  32         }
  33
  34         @Override
  35         public void dragStart(DragSourceEvent event) {
  36             IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
  37             List list = selection.toList();
  38             for (Object object : list) {
  39             if(!(object instanceof DefinedTermBase)){
  40                 event.doit = false;
  41                 return;
  42             }
  43         }
  44                 event.doit = true;
  45         }
  46
  47         @Override
  48         public void dragSetData(DragSourceEvent event) {
  49
  50                 IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
  51                 List<DefinedTermBase> definedTerms = new ArrayList<DefinedTermBase>();
  52
  53                 for (Object object : selection.toList()){
  54                                 definedTerms.add((DefinedTermBase)object);
  55                         }
  56
  57                 if (TermTransfer.getInstance().isSupportedType(
  58                                 event.dataType)) {
  59                         event.data = definedTerms.toArray(new DefinedTermBase[definedTerms.size()]);
  60                 }
  61         }
  62
  63 }