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/*****************************************************************************
* Copyright (c) 2009 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
*
* Contributors:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.component.custom.edit.policies;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
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.uml2.uml.Element;
/**
* Edit policy for specific Label.
* @since 3.0
*/
public abstract class AbstractCustomLabelEditPolicy extends GraphicalEditPolicy implements IPapyrusListener, NotificationListener {
/** constant for this edit policy role. */
public static final String SPECIFIC_NAME_LABEL_POLICY = "SpecificNameLabelEditPolicy"; //$NON-NLS-1$
/**
* Creates a new Specific Name display edit policy.
*/
public AbstractCustomLabelEditPolicy() {
super();
}
/**
* Activate.
*
* {@inheritDoc}
*/
@Override
public void activate() {
// retrieve the view and the element managed by the edit part
View view = getView();
if (view == null) {
return;
}
Element element = getUMLElement();
if (getUMLElement() != null) {
// adds a listener on the view and the element controlled by the editpart
getDiagramEventBroker().addNotificationListener(view, this);
getDiagramEventBroker().addNotificationListener(element, this);
addAdditionalListeners();
refreshDisplay();
}
}
/**
* Adds more listeners upon activation.
*/
protected void addAdditionalListeners() {
// default implementation does nothing
}
/**
* Deactivate.
*
* {@inheritDoc}
*/
@Override
public void deactivate() {
// retrieve the view and the element managed by the edit part
View view = getView();
if (view == null) {
return;
}
Element element = getUMLElement();
// remove notification on element and view
getDiagramEventBroker().removeNotificationListener(view, this);
if (element == null) {
return;
}
getDiagramEventBroker().removeNotificationListener(element, this);
removeAdditionalListeners();
}
/**
* Remove the others listeners.
*/
protected void removeAdditionalListeners() {
// default implementation does nothing
}
/**
* Gets the diagram event broker from the editing domain.
*
* @return the diagram event broker
*/
protected DiagramEventBroker getDiagramEventBroker() {
TransactionalEditingDomain theEditingDomain = ((IGraphicalEditPart) getHost()).getEditingDomain();
if (theEditingDomain != null) {
return DiagramEventBroker.getInstance(theEditingDomain);
}
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() {
return (Element) getView().getElement();
}
/**
* 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();
}
/**
* Refreshes the display for the element controlled by the edit part with this edit policies.
*/
public abstract void refreshDisplay();
}
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