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/*******************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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
*******************************************************************************/
package org.eclipse.papyrus.uml.diagram.timing.custom.edit.policies;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.GraphicalEditPolicy;
import org.eclipse.gmf.runtime.diagram.core.listener.DiagramEventBroker;
import org.eclipse.gmf.runtime.diagram.core.listener.NotificationListener;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.core.listenerservice.IPapyrusListener;
import org.eclipse.papyrus.uml.diagram.timing.custom.utils.EditPartUtils;
import org.eclipse.papyrus.uml.diagram.timing.custom.utils.Utils;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.UMLPackage;
/**
* This EditPolicy adds a notification listener on the UML element of its EditPart in order to refresh the notation
* model in response to changes in the semantic model.
*/
public class FirstEventRefreshEditPolicy extends GraphicalEditPolicy implements NotificationListener, IPapyrusListener {
public static final String VIEW_REFRESH_ROLE = "ViewRefreshRole"; //$NON-NLS-1$
private Element umlElement;
public FirstEventRefreshEditPolicy() {
super();
}
@Override
public void activate() {
this.umlElement = getUMLElement();
if (this.umlElement == null) {
return;
}
// adds a listener on the UML element
getDiagramEventBroker().addNotificationListener(this.umlElement, this);
// initial refresh
refreshView();
}
@Override
public void deactivate() {
// retrieve the UML element managed by the edit part
if (this.umlElement == null) {
return;
}
// remove the listener from the UML element
getDiagramEventBroker().removeNotificationListener(this.umlElement, this);
}
/**
* Gets the diagram event broker from the editing domain.
*
* @return the diagram event broker
*/
protected DiagramEventBroker getDiagramEventBroker() {
final TransactionalEditingDomain editingDomain = ((IGraphicalEditPart) getHost()).getEditingDomain();
if (editingDomain != null) {
return DiagramEventBroker.getInstance(editingDomain);
}
return null;
}
/**
* Returns the uml element controlled by the host edit part
*
* @return the uml element controlled by the host edit part
*/
protected Element getUMLElement() {
final View view = getView();
if (view != null) {
return (Element) view.getElement();
}
return null;
}
/**
* Returns the view controlled by the host edit part
*
* @return the view controlled by the host edit part
*/
protected View getView() {
return (View) getHost().getModel();
}
public void notifyChanged(final Notification notification) {
if (notification.getEventType() == Notification.SET) {
final Object feature = notification.getFeature();
if (feature == UMLPackage.eINSTANCE.getTimeObservation_FirstEvent() || feature == UMLPackage.eINSTANCE.getTimeObservation_Event()
|| feature == UMLPackage.eINSTANCE.getTimeConstraint_FirstEvent() || feature == UMLPackage.eINSTANCE.getConstraint_ConstrainedElement()) {
refreshView();
}
}
}
/** Refreshes the View for the element controlled by the edit part with this edit policy */
public void refreshView() {
final EditPart compartmentEditPart = EditPartUtils.findParentTimelineCompartment(getHost());
final Command command = compartmentEditPart.getCommand(AbstractTimelineLayoutPolicy.UPDATE_LAYOUT_REQUEST);
final TransactionalEditingDomain domain = TransactionUtil.getEditingDomain(getView());
Utils.executeLaterUnprotected(command, domain);
}
}
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