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/**
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* Copyright (C) 2009 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.definedterm.e4;
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import java.util.List;
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import org.eclipse.jface.util.LocalSelectionTransfer;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.TreeSelection;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.swt.dnd.DragSourceAdapter;
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import org.eclipse.swt.dnd.DragSourceEvent;
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import eu.etaxonomy.cdm.persistence.dto.TermDto;
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import eu.etaxonomy.taxeditor.editor.definedterm.TermTransfer;
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/**
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*
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* @author pplitzner
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* @since Aug 22, 2017
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*
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*/
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public class DefinedTermDragListenerE4 extends DragSourceAdapter {
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private Viewer viewer;
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public DefinedTermDragListenerE4(Viewer viewer) {
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this.viewer = viewer;
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}
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@Override
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public void dragStart(DragSourceEvent event) {
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IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
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List list = selection.toList();
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for (Object object : list) {
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if(!(object instanceof TermDto)){
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event.doit = false;
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return;
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}
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}
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event.doit = true;
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}
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@Override
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public void dragFinished(DragSourceEvent event) {
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super.dragFinished(event);
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LocalSelectionTransfer.getTransfer().setSelection(null);
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}
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@Override
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public void dragSetData(DragSourceEvent event) {
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IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
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if (LocalSelectionTransfer.getTransfer().isSupportedType(event.dataType)) {
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LocalSelectionTransfer.getTransfer().setSelection(selection);
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if (selection.getFirstElement() instanceof TermDto){
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TermTransfer.getInstance().setSelection((TermDto)selection.getFirstElement());
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}
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}
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if(selection!=null && !selection.isEmpty()){
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if (selection instanceof TreeSelection && ((TreeSelection)selection).getFirstElement() instanceof TermDto){
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TermDto[] featureNodes = (TermDto[]) selection.toList().toArray(new TermDto[selection.size()]);
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event.data = featureNodes;
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}
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}
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}
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}
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