org.eclipse.xwt.tools.ui.designer.core/src/org/eclipse/xwt/tools/ui/designer/core/parts/AbstractDiagramEditPart.java

/*******************************************************************************
 * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) 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:
 *     Soyatec - initial API and implementation
 *******************************************************************************/
package org.eclipse.xwt.tools.ui.designer.core.parts;

import org.eclipse.draw2d.FreeformLayer;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.MarginBorder;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.SnapToGeometry;
import org.eclipse.gef.SnapToHelper;
import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
import org.eclipse.xwt.tools.ui.designer.core.layouts.FreeformXYFlowLayout;

/**
 * @author jliu jin.liu@soyatec.com
 */
public abstract class AbstractDiagramEditPart extends AbstractGraphicalEditPart {

	public AbstractDiagramEditPart(EObject document) {
		setModel(document);
	}

	/**
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure() {
		IFigure contentPane = new FreeformLayer();
		contentPane.setBorder(new MarginBorder(20));
		contentPane.setLayoutManager(new FreeformXYFlowLayout());
		// contentPane.setBackgroundColor(ColorConstants.white);
		contentPane.setOpaque(false);
		return contentPane;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#getAdapter(java.lang.Class)
	 */
	public Object getAdapter(Class key) {
		if (key == SnapToHelper.class) {
			return new SnapToGeometry(this);
		}
		return super.getAdapter(key);
	}

}