eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDropAdapter.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.featuretree.e4;
  10
  11 import org.eclipse.jface.viewers.TreeViewer;
  12 import org.eclipse.jface.viewers.Viewer;
  13 import org.eclipse.jface.viewers.ViewerDropAdapter;
  14 import org.eclipse.swt.dnd.TransferData;
  15
  16 import eu.etaxonomy.cdm.api.service.IFeatureNodeService;
  17 import eu.etaxonomy.cdm.model.description.FeatureNode;
  18 import eu.etaxonomy.cdm.model.description.FeatureTree;
  19 import eu.etaxonomy.taxeditor.featuretree.FeatureNodeTransfer;
  20 import eu.etaxonomy.taxeditor.store.CdmStore;
  21
  22 class FeatureNodeDropAdapter extends ViewerDropAdapter {
  23
  24     private final FeatureTreeEditor featureTreeEditor;
  25
  26     protected FeatureNodeDropAdapter(FeatureTreeEditor featureTreeEditor, Viewer viewer) {
  27                 super(viewer);
  28         this.featureTreeEditor = featureTreeEditor;
  29         }
  30
  31         @Override
  32         public boolean performDrop(Object data) {
  33                 FeatureNode target = (FeatureNode) getCurrentTarget();
  34                 int position = 0;
  35
  36                 if (target != null) {
  37                         int location = getCurrentLocation();
  38                         FeatureNode parent = target.getParent();
  39                         if (location == LOCATION_BEFORE) {
  40                                 position = Math.max(0, parent.getIndex(target) - 1);
  41                                 target = parent;
  42                         }
  43
  44                         if (location == LOCATION_AFTER) {
  45                                 position = parent.getIndex(target);
  46                                 target = parent;
  47                         }
  48                 }
  49
  50                 // set target to root node if there is no target specified
  51                 if (target == null) {
  52                         FeatureTree featureTree = (FeatureTree) getViewer().getInput();
  53                         target = featureTree.getRoot();
  54                 }
  55
  56                 Object[] droppedObjects = (Object[]) data;
  57                 TreeViewer viewer = (TreeViewer) getViewer();
  58
  59                 // cannot drop a feature node onto itself
  60                 for (Object droppedObject : droppedObjects) {
  61                         if (droppedObject.equals(target)) {
  62                                 return false;
  63                         }
  64                 }
  65                 for (Object droppedObject : droppedObjects) {
  66                         FeatureNode droppedNode = (FeatureNode) droppedObject;
  67                         CdmStore.getService(IFeatureNodeService.class).moveFeatureNode(droppedNode.getUuid(), target.getUuid(), position);
  68                         viewer.refresh();
  69 //                      viewer.reveal(droppedNode);
  70                 }
  71         this.featureTreeEditor.setDirty(true);
  72                 return true;
  73         }
  74
  75     @Override
  76     public boolean validateDrop(Object target, int operation, TransferData transferData) {
  77         return FeatureNodeTransfer.getInstance().isSupportedType(transferData);
  78     }
  79
  80 }