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/**
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* Copyright (C) 2017 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.workingSet;
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import java.util.ArrayList;
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import java.util.Collection;
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import org.eclipse.jface.util.LocalSelectionTransfer;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.ITreeSelection;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.jface.viewers.ViewerDropAdapter;
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import org.eclipse.swt.dnd.TransferData;
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import eu.etaxonomy.cdm.model.taxon.TaxonNode;
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/**
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* @author pplitzner
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* @since Dec 19, 2017
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*
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*/
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public class TaxonNodeDropAdapter extends ViewerDropAdapter {
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private WorkingSetEditor workingSetEditor;
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public TaxonNodeDropAdapter(WorkingSetEditor workingSetEditor) {
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super(workingSetEditor.getTaxonTreeViewer());
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this.workingSetEditor = workingSetEditor;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean performDrop(Object data) {
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TaxonNode taxonNode= (TaxonNode) ((ITreeSelection) data).getFirstElement();
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//load into WS editor session
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taxonNode = workingSetEditor.getCdmEntitySession().load(taxonNode, false);
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Viewer taxonTreeViewer = workingSetEditor.getTaxonTreeViewer();
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Object input = taxonTreeViewer.getInput();
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Collection<TaxonNode> treeNodes;
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if(input==null){
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treeNodes = new ArrayList<>();
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}
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else{
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treeNodes = (Collection<TaxonNode>) input;
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}
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treeNodes.add(taxonNode);
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taxonTreeViewer.setInput(treeNodes);
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workingSetEditor.setDirty();
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean validateDrop(Object target, int operation, TransferData transferType) {
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ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
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if(selection instanceof ITreeSelection
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&& ((IStructuredSelection) selection).size()==1
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&& ((IStructuredSelection) selection).getFirstElement() instanceof TaxonNode){
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return true;
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}
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return false;
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}
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}
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