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/**
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* Copyright (C) 2014 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.derivate;
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import org.eclipse.core.runtime.Status;
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import org.eclipse.jface.util.LocalSelectionTransfer;
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import org.eclipse.jface.viewers.TreeNode;
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import org.eclipse.jface.viewers.ViewerDropAdapter;
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import org.eclipse.swt.dnd.DND;
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import org.eclipse.swt.dnd.DropTargetEvent;
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import org.eclipse.swt.dnd.TransferData;
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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.derivate.operation.MoveDerivateOperation;
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import eu.etaxonomy.taxeditor.model.AbstractUtility;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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/**
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* @author pplitzner
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* @date 18.03.2014
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*
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*/
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public class DerivateDropListener extends ViewerDropAdapter {
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private final DerivateView derivateView;
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protected DerivateDropListener(DerivateView derivateView) {
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super(derivateView.getViewer());
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this.derivateView = derivateView;
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}
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@Override
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public boolean performDrop(Object data) {
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if(derivateView.isDirty()){
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MessagingUtils.warningDialog(DerivateView.VIEW_HAS_UNSAVED_CHANGES, this, DerivateView.YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION);
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return false;
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}
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Object target = getCurrentTarget();
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if(target instanceof TreeNode && data instanceof DerivateViewSelection){
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DerivateViewSelection derivateViewSelection = (DerivateViewSelection)data;
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TreeNode targetNode = (TreeNode) target;
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TreeNode draggedNode = EditorUtil.getTreeNodeOfSelection(derivateViewSelection.getSelection());
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if(draggedNode!=null){
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MoveDerivateOperation moveDerivateOperation = new MoveDerivateOperation(String.format(Messages.DerivateDropListener_MOVE_TO, derivateView.getLabelProvider().getDerivateText(draggedNode), derivateView.getLabelProvider().getDerivateText(targetNode)), EditorUtil.getUndoContext(), derivateView, draggedNode, targetNode);
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return AbstractUtility.executeOperation(moveDerivateOperation).equals(Status.OK_STATUS)?true:false;
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}
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}
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return false;
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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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return LocalSelectionTransfer.getTransfer().isSupportedType(transferType) && target instanceof TreeNode;
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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 void dragOver(DropTargetEvent event) {
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super.dragOver(event);
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event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
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}
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}
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