eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/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.descriptiveDataSet;
  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.persistence.dto.TaxonNodeDto;
  19
  20 /**
  21  * @author pplitzner
  22  * @since Dec 19, 2017
  23  *
  24  */
  25 public class TaxonNodeDropAdapter extends ViewerDropAdapter {
  26
  27     private DescriptiveDataSetEditor descriptiveDataSetEditor;
  28
  29     public TaxonNodeDropAdapter(DescriptiveDataSetEditor descriptiveDataSetEditor) {
  30         super(descriptiveDataSetEditor.getTaxonTreeViewer());
  31         this.descriptiveDataSetEditor = descriptiveDataSetEditor;
  32     }
  33
  34     /**
  35      * {@inheritDoc}
  36      */
  37     @Override
  38     public boolean performDrop(Object data) {
  39         TaxonNodeDto taxonNodeDto = (TaxonNodeDto) ((ITreeSelection) data).getFirstElement();
  40         descriptiveDataSetEditor.addTaxonNode(taxonNodeDto);
  41         descriptiveDataSetEditor.setFocus();
  42         return true;
  43     }
  44
  45     /**
  46      * {@inheritDoc}
  47      */
  48     @Override
  49     public boolean validateDrop(Object target, int operation, TransferData transferType) {
  50         ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
  51         if(selection instanceof ITreeSelection
  52                 && ((IStructuredSelection) selection).size()==1
  53                 && ((IStructuredSelection) selection).getFirstElement() instanceof TaxonNodeDto){
  54             return true;
  55         }
  56         return false;
  57     }
  58
  59
  60 }