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

   1 /**
   2  * Copyright (C) 2014 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.view.derivate;
  10
  11 import org.eclipse.jface.util.LocalSelectionTransfer;
  12 import org.eclipse.jface.viewers.ISelection;
  13 import org.eclipse.swt.dnd.DragSourceAdapter;
  14 import org.eclipse.swt.dnd.DragSourceEvent;
  15
  16 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  17 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  18
  19 /**
  20  * @author pplitzner
  21  * @date 18.03.2014
  22  *
  23  */
  24 public class DerivateDragListener extends DragSourceAdapter{
  25
  26     private final DerivateView derivateView;
  27
  28     /**
  29      * @param derivateView
  30      */
  31     public DerivateDragListener(DerivateView derivateView) {
  32         this.derivateView = derivateView;
  33     }
  34
  35     @Override
  36     public void dragSetData(DragSourceEvent event) {
  37         if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) {
  38             DerivateViewSelection derivateViewSelection = new DerivateViewSelection(derivateView.getViewer().getSelection(), derivateView);
  39             LocalSelectionTransfer.getTransfer().setSelection(derivateViewSelection);
  40         }
  41     }
  42
  43     @Override
  44     public void dragStart(DragSourceEvent event) {
  45         if(derivateView.isDirty()){
  46             event.doit = false;
  47             MessagingUtils.warningDialog(DerivateView.VIEW_HAS_UNSAVED_CHANGES, this, DerivateView.YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION);
  48             return;
  49         }
  50         ISelection selection = derivateView.getViewer().getSelection();
  51         if(EditorUtil.getTreeNodeOfSelection(selection)!=null){
  52             event.doit = true;
  53         }
  54         else{
  55             event.doit = false;
  56         }
  57     }
  58 }