eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/DescriptionElementDropAdapter.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.Collection;
  14
  15 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  16 import org.eclipse.jface.viewers.Viewer;
  17 import org.eclipse.swt.dnd.DND;
  18 import org.eclipse.swt.dnd.TransferData;
  19
  20 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  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.l10n.Messages;
  25 import eu.etaxonomy.taxeditor.editor.name.e4.TaxonNameEditorE4;
  26 import eu.etaxonomy.taxeditor.editor.view.descriptive.e4.FactualDataPartE4;
  27 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.MoveDescriptionElementsOperation;
  28 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  29 import eu.etaxonomy.taxeditor.operation.AbstractPostTaxonOperation;
  30 import eu.etaxonomy.taxeditor.ui.EditViewerDropAdapter;
  31
  32 /**
  33  * @author n.hoffmann
  34  * @created Feb 8, 2011
  35  * @version 1.0
  36  */
  37 public class DescriptionElementDropAdapter extends EditViewerDropAdapter {
  38
  39     private static final String OPERATION_NOT_SUPPORTED_YET = Messages.DescriptionElementDropAdapter_NOT_SUPPORTED;
  40
  41
  42
  43     /**
  44          * @param viewer
  45          */
  46         public DescriptionElementDropAdapter(Viewer viewer) {
  47                 super(viewer);
  48         }
  49
  50         /* (non-Javadoc)
  51          * @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
  52          */
  53         @Override
  54         public boolean performDrop(Object data) {
  55                 TaxonDescription target = (TaxonDescription) getCurrentTarget();
  56                 Object[] droppedElements = (Object[]) data;
  57
  58                 Collection<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
  59
  60                 boolean isCopy = getCurrentOperation() == DND.DROP_COPY ? true : false;
  61
  62                 // cannot drop a feature node onto itself
  63                 if (droppedElements != null){
  64                         for (Object droppedElement : droppedElements) {
  65                                 if (droppedElement == null){
  66                                         MessagingUtils.warningDialog(OPERATION_NOT_SUPPORTED_YET, this, Messages.DescriptionElementDropAdapter_NOT_SUPPORTED_NEW_ELEMENT);
  67                                         return false;
  68                                 }
  69                                 if(! (droppedElement instanceof DescriptionElementBase)){
  70                                         return false;
  71                                 }else{
  72                                         DescriptionElementBase descriptionElement = (DescriptionElementBase) droppedElement;
  73
  74                                         if (descriptionElement.getInDescription().equals(target)) {
  75                                                 return false;
  76                                         }
  77                                         DescriptionBase<?> description = descriptionElement.getInDescription();
  78                                         description.removeElement(descriptionElement);
  79                                         target.addElement(descriptionElement);
  80
  81                                         if (description.getElements().isEmpty()){
  82                                             ((TaxonDescription)description).getTaxon().removeDescription((TaxonDescription)description, false);
  83                                         }
  84                                         descriptionElements.add(descriptionElement);
  85                                 }
  86                         }
  87                         TaxonNameEditorE4 editor = null;
  88                         Object activePart = EditorUtil.getActivePart();
  89                         if (activePart instanceof FactualDataPartE4){
  90                             MPart selectionProvidingPart =(MPart) ((FactualDataPartE4)activePart).getSelectionProvidingPart();
  91                             Object obj = selectionProvidingPart.getObject();
  92                             if (obj instanceof TaxonNameEditorE4){
  93                                 editor = (TaxonNameEditorE4) obj;
  94                             }
  95                         }
  96                         AbstractPostTaxonOperation operation = new MoveDescriptionElementsOperation(Messages.DescriptionElementDropAdapter_MOVE_DESC, EditorUtil.getUndoContext(), target, descriptionElements, isCopy, null, sync);
  97
  98                         editor.getEditorInput().addOperation(operation);
  99                         editor.setDirty();
 100 //                      EditorUtil.executeOperation(operation, sync);
 101                         return true;
 102                 }
 103                 MessagingUtils.warningDialog(OPERATION_NOT_SUPPORTED_YET, this, Messages.DescriptionElementDropAdapter_NOT_SUPPORTED_EMPTY_ELEMENT);
 104
 105                 return false;
 106
 107         }
 108
 109         /* (non-Javadoc)
 110          * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
 111          */
 112         @Override
 113         public boolean validateDrop(Object target, int operation,
 114                         TransferData transferData) {
 115                 boolean transferDataIsSupported = DescriptionElementTransfer.getInstance().isSupportedType(
 116                                 transferData);
 117                 return target instanceof TaxonDescription && transferDataIsSupported;
 118         }
 119
 120 }