taxeditor-editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/DescriptionElementDropAdapter.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.Collection;
  15
  16 import org.eclipse.jface.viewers.Viewer;
  17 import org.eclipse.jface.viewers.ViewerDropAdapter;
  18 import org.eclipse.swt.dnd.DND;
  19 import org.eclipse.swt.dnd.TransferData;
  20
  21 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  22 import eu.etaxonomy.cdm.model.description.TaxonDescription;
  23 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  24 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.MoveDescriptionElementsOperation;
  25 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  26 import eu.etaxonomy.taxeditor.store.StoreUtil;
  27
  28 /**
  29  * @author n.hoffmann
  30  * @created Feb 8, 2011
  31  * @version 1.0
  32  */
  33 public class DescriptionElementDropAdapter extends ViewerDropAdapter {
  34
  35         /**
  36          * @param viewer
  37          */
  38         protected DescriptionElementDropAdapter(Viewer viewer) {
  39                 super(viewer);
  40         }
  41
  42         /* (non-Javadoc)
  43          * @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
  44          */
  45         @Override
  46         public boolean performDrop(Object data) {
  47                 TaxonDescription target = (TaxonDescription) getCurrentTarget();
  48                 Object[] droppedElements = (Object[]) data;
  49
  50                 Collection<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
  51
  52                 boolean isCopy = getCurrentOperation() == DND.DROP_COPY ? true : false;
  53
  54                 // cannot drop a feature node onto itself
  55                 for (Object droppedElement : droppedElements) {
  56                         if (droppedElement == null){
  57                                 StoreUtil.warningDialog("Operation not supported yet", this, "We are currently unable to drag and drop a newly created element. Please save the editor to make this work.");
  58                                 return false;
  59                         }
  60                         if(! (droppedElement instanceof DescriptionElementBase)){
  61                                 return false;
  62                         }else{
  63                                 DescriptionElementBase descriptionElement = (DescriptionElementBase) droppedElement;
  64
  65                                 if (descriptionElement.getInDescription().equals(target)) {
  66                                         return false;
  67                                 }
  68
  69                                 descriptionElements.add(descriptionElement);
  70                         }
  71                 }
  72
  73                 AbstractPostOperation operation = new MoveDescriptionElementsOperation("Move Descriptions", EditorUtil.getUndoContext(), target, descriptionElements, isCopy, null);
  74
  75                 EditorUtil.executeOperation(operation);
  76
  77                 return true;
  78         }
  79
  80         /* (non-Javadoc)
  81          * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
  82          */
  83         @Override
  84         public boolean validateDrop(Object target, int operation,
  85                         TransferData transferData) {
  86                 boolean transferDataIsSupported = DescriptionElementTransfer.getInstance().isSupportedType(
  87                                 transferData);
  88                 System.out.println(target);
  89                 return target instanceof TaxonDescription && transferDataIsSupported;
  90         }
  91
  92 }