eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/workingSet/TaxonNodeDropAdapter.java

   1 /**
   2 * Copyright (C) 2017 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.workingSet;
  10
  11 import org.eclipse.jface.util.LocalSelectionTransfer;
  12 import org.eclipse.jface.viewers.ISelection;
  13 import org.eclipse.jface.viewers.IStructuredSelection;
  14 import org.eclipse.jface.viewers.ITreeSelection;
  15 import org.eclipse.jface.viewers.ViewerDropAdapter;
  16 import org.eclipse.swt.dnd.TransferData;
  17
  18 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  19
  20 /**
  21  * @author pplitzner
  22  * @since Dec 19, 2017
  23  *
  24  */
  25 public class TaxonNodeDropAdapter extends ViewerDropAdapter {
  26
  27     private WorkingSetEditor workingSetEditor;
  28
  29     public TaxonNodeDropAdapter(WorkingSetEditor workingSetEditor) {
  30         super(workingSetEditor.getTaxonTreeViewer());
  31         this.workingSetEditor = workingSetEditor;
  32     }
  33
  34     /**
  35      * {@inheritDoc}
  36      */
  37     @Override
  38     public boolean performDrop(Object data) {
  39         TaxonNode taxonNode= (TaxonNode) ((ITreeSelection) data).getFirstElement();
  40         workingSetEditor.addTaxonNode(taxonNode);
  41         return true;
  42     }
  43
  44     /**
  45      * {@inheritDoc}
  46      */
  47     @Override
  48     public boolean validateDrop(Object target, int operation, TransferData transferType) {
  49         ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
  50         if(selection instanceof ITreeSelection
  51                 && ((IStructuredSelection) selection).size()==1
  52                 && ((IStructuredSelection) selection).getFirstElement() instanceof TaxonNode){
  53             return true;
  54         }
  55         return false;
  56     }
  57
  58
  59 }