eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/derivate/DerivateDragListener.java

   1 // $Id$
   2 /**
   3  * Copyright (C) 2014 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 package eu.etaxonomy.taxeditor.editor.view.derivate;
  11
  12 import org.eclipse.jface.util.LocalSelectionTransfer;
  13 import org.eclipse.jface.viewers.ISelection;
  14 import org.eclipse.swt.dnd.DragSourceAdapter;
  15 import org.eclipse.swt.dnd.DragSourceEvent;
  16
  17 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  18 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  19
  20 /**
  21  * @author pplitzner
  22  * @date 18.03.2014
  23  *
  24  */
  25 public class DerivateDragListener extends DragSourceAdapter{
  26
  27     private final DerivateView derivateView;
  28
  29     /**
  30      * @param derivateView
  31      */
  32     public DerivateDragListener(DerivateView derivateView) {
  33         this.derivateView = derivateView;
  34     }
  35
  36     @Override
  37     public void dragSetData(DragSourceEvent event) {
  38         if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) {
  39             DerivateViewSelection derivateViewSelection = new DerivateViewSelection(derivateView.getViewer().getSelection(), derivateView);
  40             LocalSelectionTransfer.getTransfer().setSelection(derivateViewSelection);
  41         }
  42     }
  43
  44     @Override
  45     public void dragStart(DragSourceEvent event) {
  46         if(derivateView.isDirty()){
  47             event.doit = false;
  48             MessagingUtils.warningDialog(DerivateView.VIEW_HAS_UNSAVED_CHANGES, this, DerivateView.YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION);
  49             return;
  50         }
  51         ISelection selection = derivateView.getViewer().getSelection();
  52         if(EditorUtil.getTreeNodeOfSelection(selection)!=null){
  53             event.doit = true;
  54         }
  55         else{
  56             event.doit = false;
  57         }
  58     }
  59 }