metabest.solver.ui.wizards.dnd.DragMetaModelElementViewer.java Source code

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Here is the source code for metabest.solver.ui.wizards.dnd.DragMetaModelElementViewer.java

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/*******************************************************************************
 * Copyright (c) 2015 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package metabest.solver.ui.wizards.dnd;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Composite;

import metabup.metamodel.MetaModel;

public class DragMetaModelElementViewer extends TreeViewer {
    MetaModel metamodel = null;
    IStructuredSelection selection = null;

    public void refresh(MetaModel metamodel) {
        if (metamodel != null) {
            this.metamodel = metamodel;
            setInput(metamodel);
            refresh();
            expandAll();
        }
    }

    public DragMetaModelElementViewer(Composite parent, MetaModel metamodel) {
        super(parent);
        this.metamodel = metamodel;
        int operations = DND.DROP_COPY | DND.DROP_MOVE;
        Transfer[] transferTypes = new Transfer[] { TextTransfer.getInstance() };
        addDragSupport(operations, transferTypes, new MetaModelElementDragListener(this));
        setContentProvider(new TreeContentProvider());
        setLabelProvider(new TreeLabelProvider());
        setInput(metamodel);
        refresh(metamodel);
        expandAll();
    }
}