eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/derivate/DerivateDropListener.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.TreeNode;
  14 import org.eclipse.jface.viewers.ViewerDropAdapter;
  15 import org.eclipse.swt.dnd.TransferData;
  16
  17 import eu.etaxonomy.cdm.api.service.IOccurrenceService;
  18 import eu.etaxonomy.cdm.api.service.molecular.ISequenceService;
  19 import eu.etaxonomy.cdm.model.molecular.DnaSample;
  20 import eu.etaxonomy.cdm.model.molecular.Sequence;
  21 import eu.etaxonomy.cdm.model.molecular.SingleRead;
  22 import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;
  23 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
  24 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationType;
  25 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  26 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  27 import eu.etaxonomy.taxeditor.store.CdmStore;
  28 import eu.etaxonomy.taxeditor.view.derivateSearch.DerivateLabelProvider;
  29
  30 /**
  31  * @author pplitzner
  32  * @date 18.03.2014
  33  *
  34  */
  35 public class DerivateDropListener extends ViewerDropAdapter {
  36
  37     private final DerivateView derivateView;
  38
  39     /**
  40      * @param derivateView
  41      */
  42     protected DerivateDropListener(DerivateView derivateView) {
  43         super(derivateView.getViewer());
  44         this.derivateView = derivateView;
  45     }
  46
  47     /* (non-Javadoc)
  48      * @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
  49      */
  50     @Override
  51     public boolean performDrop(Object data) {
  52         if(derivateView.isDirty()){
  53             MessagingUtils.warningDialog("View has unsaved changes", this, "You need to save before performing this action");
  54             return false;
  55         }
  56         Object target = getCurrentTarget();
  57         if(target instanceof TreeNode && data instanceof DerivateViewSelection){
  58             DerivateViewSelection derivateViewSelection = (DerivateViewSelection)data;
  59             TreeNode targetNode = (TreeNode) target;
  60             TreeNode draggednode = EditorUtil.getTreeNodeOfSelection(derivateViewSelection.getSelection());
  61             if(draggednode!=null){
  62                 if(moveTreeNode(draggednode, targetNode)){
  63                     //update DerivateView
  64                     derivateView.getConversationHolder().commit();
  65                     derivateView.refreshTree();
  66
  67                     // update source DerivateView if dragging between different views occurred
  68                     DerivateView sourceDerivateView = derivateViewSelection.getDerivateView();
  69                     if(sourceDerivateView!=derivateView){
  70                         sourceDerivateView.getConversationHolder().commit();
  71                         sourceDerivateView.refreshTree();
  72                     }
  73
  74                     //FIXME: way too much overhead for just refreshing the other DerivateView
  75 //                    CdmStore.getContextManager().notifyContextRefresh();
  76                     LocalSelectionTransfer.getTransfer().setSelection(null);
  77                     return true;
  78                 }
  79                 else{
  80                     DerivateLabelProvider derivateLabelProvider = new DerivateLabelProvider();
  81                     derivateLabelProvider.setConversation(derivateView.getConversationHolder());
  82                     MessagingUtils.warningDialog("Moving derivate not possible!", derivateView, "Moving \""+derivateLabelProvider.getDerivateText(draggednode)+"\" to \""+derivateLabelProvider.getDerivateText(targetNode)+"\" is not possible!");
  83                 }
  84             }
  85         }
  86         return false;
  87     }
  88
  89     /* (non-Javadoc)
  90      * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
  91      */
  92     @Override
  93     public boolean validateDrop(Object target, int operation, TransferData transferType) {
  94         return LocalSelectionTransfer.getTransfer().isSupportedType(transferType) && target instanceof TreeNode;
  95     }
  96
  97     /**
  98      * @param value
  99      * @return
 100      */
 101     private boolean moveTreeNode(TreeNode draggedNode, TreeNode targetNode) {
 102         Object draggedNodeValue = draggedNode.getValue();
 103         Object targetNodeValue = targetNode.getValue();
 104         TreeNode fromParentNode = draggedNode.getParent();
 105         Object fromParentSpecimen = null;
 106         if(fromParentNode!=null){
 107             fromParentSpecimen = fromParentNode.getValue();
 108         }
 109
 110         // drag'n'drop for SpecimenOrObservationBase
 111         IOccurrenceService occurrenceService = CdmStore.getService(IOccurrenceService.class);
 112         if(draggedNodeValue instanceof DerivedUnit && targetNodeValue instanceof SpecimenOrObservationBase<?>){
 113             DerivedUnit draggedSpecimen = (DerivedUnit) draggedNodeValue;
 114             SpecimenOrObservationBase<?> targetSpecimen = (SpecimenOrObservationBase<?>) targetNodeValue;
 115             //check if type is a sub derivate type
 116             if(fromParentSpecimen instanceof SpecimenOrObservationBase<?>
 117             && fromParentNode!=null
 118             && !fromParentNode.equals(targetNode)){//don't drag on direct parent node)
 119                 return occurrenceService.moveDerivate((SpecimenOrObservationBase<?>)fromParentSpecimen, targetSpecimen, draggedSpecimen);
 120             }
 121         }
 122
 123         // drag'n'drop for SingleRead
 124         else if(draggedNodeValue instanceof SingleRead && targetNodeValue instanceof Sequence){
 125             SingleRead singleRead = (SingleRead) draggedNodeValue;
 126             if(fromParentSpecimen instanceof Sequence){
 127                 return CdmStore.getService(ISequenceService.class).moveSingleRead((Sequence)fromParentSpecimen, (Sequence)targetNodeValue, singleRead);
 128             }
 129         }
 130
 131         // drag'n'drop for Sequence
 132         else if(draggedNodeValue instanceof Sequence && targetNodeValue instanceof DnaSample && ((SpecimenOrObservationBase<?>) targetNodeValue).getRecordBasis()==SpecimenOrObservationType.DnaSample){
 133             Sequence sequence = (Sequence)draggedNodeValue;
 134             if(fromParentSpecimen instanceof DnaSample && ((SpecimenOrObservationBase<?>) targetNodeValue).getRecordBasis()==SpecimenOrObservationType.DnaSample){
 135                 return occurrenceService.moveSequence((DnaSample)fromParentSpecimen, (DnaSample)targetNodeValue, sequence);
 136             }
 137         }
 138         return false;
 139     }
 140
 141 }