/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.gd.common.part;
import java.beans.PropertyChangeEvent;
import java.util.List;
import org.eclipse.draw2d.FreeformLayer;
import org.eclipse.draw2d.FreeformLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.LineBorder;
import org.eclipse.gef.SnapToGrid;
import org.eclipse.gef.SnapToHelper;
import org.jbpm.gd.common.notation.RootContainer;
import org.jbpm.gd.common.policy.XYLayoutEditPolicy;
public abstract class RootContainerGraphicalEditPart
extends AbstractNotationElementGraphicalEditPart {
public RootContainerGraphicalEditPart(RootContainer rootContainer) {
super(rootContainer);
}
protected IFigure createFigure() {
FreeformLayer layer = new FreeformLayer();
layer.setLayoutManager(new FreeformLayout());
layer.setBorder(new LineBorder(1));
return layer;
}
protected List getModelChildren() {
return ((RootContainer)getNotationElement()).getNodes();
}
protected abstract XYLayoutEditPolicy createLayoutEditPolicy();
protected void createEditPolicies() {
super.createEditPolicies();
installEditPolicy("LayoutEditPolicy", createLayoutEditPolicy());
}
public void propertyChange(PropertyChangeEvent evt) {
String eventType = evt.getPropertyName();
if ("nodeAdd".equals(eventType) || "nodeRemove".equals(eventType)) {
refreshChildren();
}
}
public Object getAdapter(Class adapter) {
if (adapter == SnapToHelper.class) {
return constructSnapToHelper();
}
return super.getAdapter(adapter);
}
private Object constructSnapToHelper() {
Boolean val = (Boolean)getViewer().getProperty(SnapToGrid.PROPERTY_GRID_ENABLED);
if (val != null && val.booleanValue()) {
return new SnapToGrid(this);
} else {
return null;
}
}
}