TSEditorDropTargetListener.java

/*******************************************************************************
 * Copyright (c) 2004, 2010 BREDEX GmbH.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     BREDEX GmbH - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.jubula.client.ui.rcp.controllers.dnd;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.jubula.client.core.model.INodePO;
import org.eclipse.jubula.client.ui.constants.Constants;
import org.eclipse.jubula.client.ui.rcp.Plugin;
import org.eclipse.jubula.client.ui.rcp.editors.AbstractTestCaseEditor;
import org.eclipse.swt.dnd.TransferData;

/**
 * Drop adapter for this TestSuiteEditor
 * 
 * @author BREDEX GmbH
 * @created 24.10.2005
 */
public class TSEditorDropTargetListener extends AbstractNodeViewerDropAdapter {
    /** <code>m_editor</code> */
    private AbstractTestCaseEditor m_editor;

    /**
     * @param editor
     *            the TestCaseEditor.
     */
    public TSEditorDropTargetListener(AbstractTestCaseEditor editor) {
        super(editor.getTreeViewer());
        m_editor = editor;
        boolean scrollExpand = Plugin.getDefault().getPreferenceStore()
                .getBoolean(Constants.TREEAUTOSCROLL_KEY);
        setScrollExpandEnabled(scrollExpand);
    }

    /**
     * {@inheritDoc}
     */
    public boolean performDrop(Object data) {
        LocalSelectionTransfer transfer = LocalSelectionTransfer.getInstance();
        Object target = getCurrentTarget();
        int location = getCurrentLocation();
        if (target == null) {
            target = getFallbackTarget(getViewer());
            location = ViewerDropAdapter.LOCATION_AFTER;
        }
        if (target instanceof INodePO) {
            INodePO targetGuiNode = (INodePO)target;
            IStructuredSelection toDrop = transfer.getSelection();
            boolean succ = TSEditorDndSupport.performDrop(m_editor, toDrop,
                    targetGuiNode, location);
            logDrop(toDrop, targetGuiNode, succ);
            return succ;
        }

        return false;
    }

    /**
     * {@inheritDoc}
     */
    public boolean validateDrop(Object target, int operation,
            TransferData transferType) {
        LocalSelectionTransfer transfer = LocalSelectionTransfer.getInstance();
        Object targetNode = target;
        if (targetNode == null) {
            targetNode = m_editor.getEditorHelper().getEditSupport()
                    .getWorkVersion();
        }

        return TSEditorDndSupport.validateDrop(transfer.getSource(),
                m_editor.getTreeViewer(), transfer.getSelection(), targetNode,
                true);

    }
}