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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.view.descriptive;
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import java.util.ArrayList;
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import java.util.Collection;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.swt.dnd.DND;
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import org.eclipse.swt.dnd.TransferData;
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import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
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import eu.etaxonomy.cdm.model.description.TaxonDescription;
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import eu.etaxonomy.taxeditor.editor.EditorUtil;
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import eu.etaxonomy.taxeditor.editor.l10n.Messages;
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import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.MoveDescriptionElementsOperation;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
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import eu.etaxonomy.taxeditor.ui.EditViewerDropAdapter;
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/**
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* @author n.hoffmann
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* @created Feb 8, 2011
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* @version 1.0
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*/
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public class DescriptionElementDropAdapter extends EditViewerDropAdapter {
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private static final String OPERATION_NOT_SUPPORTED_YET = Messages.DescriptionElementDropAdapter_NOT_SUPPORTED;
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/**
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* @param viewer
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*/
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public DescriptionElementDropAdapter(Viewer viewer) {
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super(viewer);
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
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*/
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@Override
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public boolean performDrop(Object data) {
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TaxonDescription target = (TaxonDescription) getCurrentTarget();
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Object[] droppedElements = (Object[]) data;
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Collection<DescriptionElementBase> descriptionElements = new ArrayList<DescriptionElementBase>();
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boolean isCopy = getCurrentOperation() == DND.DROP_COPY ? true : false;
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// cannot drop a feature node onto itself
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if (droppedElements != null){
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for (Object droppedElement : droppedElements) {
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if (droppedElement == null){
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MessagingUtils.warningDialog(OPERATION_NOT_SUPPORTED_YET, this, Messages.DescriptionElementDropAdapter_NOT_SUPPORTED_NEW_ELEMENT);
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return false;
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}
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if(! (droppedElement instanceof DescriptionElementBase)){
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return false;
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}else{
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DescriptionElementBase descriptionElement = (DescriptionElementBase) droppedElement;
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if (descriptionElement.getInDescription().equals(target)) {
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return false;
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}
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descriptionElements.add(descriptionElement);
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}
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}
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AbstractPostOperation operation = new MoveDescriptionElementsOperation(Messages.DescriptionElementDropAdapter_MOVE_DESC, EditorUtil.getUndoContext(), target, descriptionElements, isCopy, null);
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EditorUtil.executeOperation(operation, sync);
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return true;
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}
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MessagingUtils.warningDialog(OPERATION_NOT_SUPPORTED_YET, this, Messages.DescriptionElementDropAdapter_NOT_SUPPORTED_EMPTY_ELEMENT);
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return false;
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
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*/
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@Override
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public boolean validateDrop(Object target, int operation,
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TransferData transferData) {
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boolean transferDataIsSupported = DescriptionElementTransfer.getInstance().isSupportedType(
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transferData);
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return target instanceof TaxonDescription && transferDataIsSupported;
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}
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}
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