eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/DefinedTermDropAdapter.java

   1 /**
   2 * Copyright (C) 2009 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.definedterm;
  10
  11 import java.util.ArrayList;
  12 import java.util.Collection;
  13
  14 import org.eclipse.jface.viewers.StructuredSelection;
  15 import org.eclipse.jface.viewers.ViewerDropAdapter;
  16 import org.eclipse.swt.dnd.DND;
  17 import org.eclipse.swt.dnd.DropTargetEvent;
  18 import org.eclipse.swt.dnd.TransferData;
  19
  20 import eu.etaxonomy.cdm.model.common.DefinedTermBase;
  21 import eu.etaxonomy.cdm.model.common.OrderedTermBase;
  22 import eu.etaxonomy.cdm.model.common.TermBase;
  23 import eu.etaxonomy.taxeditor.editor.definedterm.operation.MoveDefinedTermOperation;
  24 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  25 import eu.etaxonomy.taxeditor.store.StoreUtil;
  26
  27 /**
  28  * @author l.morris
  29  * @date 10 Jan 2012
  30  *
  31  */
  32 public class DefinedTermDropAdapter extends ViewerDropAdapter {
  33
  34         private final DefinedTermEditor editor;
  35         /**
  36          * @param viewer
  37          */
  38         protected DefinedTermDropAdapter(DefinedTermEditor editor) {
  39                 super(editor.getViewer());
  40                 this.editor = editor;
  41         }
  42
  43         /* (non-Javadoc)
  44          * @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
  45          */
  46         @Override
  47         public boolean performDrop(Object data) {
  48
  49                 TermBase target = (TermBase) getCurrentTarget();//can be vocab
  50                 int currentLocation = getCurrentLocation();
  51                 //DefinedTermBase[] droppedElements = (DefinedTermBase[]) data;
  52                 Object[] droppedTerms = (Object[]) data;
  53                 Collection<DefinedTermBase> sourceTerms = new ArrayList<DefinedTermBase>(); //Arrays.asList(droppedElements)
  54
  55                 for (Object droppedTerm : droppedTerms) {
  56
  57                         DefinedTermBase term = (DefinedTermBase) droppedTerm;
  58                         sourceTerms.add(term);
  59
  60                 }
  61
  62                 AbstractPostOperation operation = new MoveDefinedTermOperation("Move Descriptions",
  63                         StoreUtil.getUndoContext(),
  64                         target,
  65                         sourceTerms,
  66                         editor,
  67                         currentLocation);
  68                 //TODO: implement execute
  69                 StoreUtil.executeOperation(operation);
  70                 // select the newly moved objects
  71                 editor.getViewer().setSelection(new StructuredSelection(sourceTerms.toArray(new TermBase[sourceTerms.size()])));
  72
  73                 return true;
  74         }
  75
  76         /* (non-Javadoc)
  77          * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
  78          */
  79         @Override
  80         public boolean validateDrop(Object target, int operation,
  81                         TransferData transferType) {
  82                 boolean transferDataIsSupported = TermTransfer.getInstance().isSupportedType(transferType);
  83                 // maybe don't need this - they will be all TermBase anyway
  84                 return target instanceof TermBase && transferDataIsSupported;
  85         }
  86
  87         /* (non-Javadoc)
  88          * @see org.eclipse.jface.viewers.ViewerDropAdapter#dragOver(org.eclipse.swt.dnd.DropTargetEvent)
  89          */
  90         @Override
  91         public void dragOver(DropTargetEvent event) {
  92             super.dragOver(event);
  93             TermBase target = (TermBase) getCurrentTarget();
  94             if(!(target instanceof OrderedTermBase)) {
  95                 // this is to only disable insert between items
  96                 event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
  97             }
  98
  99
 100         }
 101
 102 }