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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.draw2d.IFigure;
import org.eclipse.emf.common.notify.Notification;
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.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.core.listenerservice.IPapyrusListener;
import org.eclipse.papyrus.uml.diagram.timing.custom.figures.LifelineFigure;
import org.eclipse.papyrus.uml.diagram.timing.custom.utils.FigureUtils;
import org.eclipse.papyrus.uml.diagram.timing.custom.utils.ViewUtils;
/**
* This EditPolicy adds a notification listener on the time ruler View that listens for its visibility and updates the
* {@link LifelineFigure#setDisplayTimeRuler(boolean) LifelineFigure's time ruler visibility}
*/
public class TimeRulerVisibilityRefreshEditPolicy extends GraphicalEditPolicy implements NotificationListener, IPapyrusListener {
public static final String ROLE = "TimeRulerVisibilityRefreshRole"; //$NON-NLS-1$
private View timeRulerCompartmentView;
public TimeRulerVisibilityRefreshEditPolicy() {
super();
}
@Override
public void activate() {
this.timeRulerCompartmentView = getListenedView();
if (this.timeRulerCompartmentView == null) {
return;
}
// adds a listener on the View
getDiagramEventBroker().addNotificationListener(this.timeRulerCompartmentView, this);
// initial refresh (so that the figure has the right visibility when the diagram is first opened)
refreshFigure();
}
@Override
public void deactivate() {
if (this.timeRulerCompartmentView == null) {
return;
}
// remove the listener from the View
getDiagramEventBroker().removeNotificationListener(this.timeRulerCompartmentView, 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;
}
protected View getListenedView() {
final View view = getView();
if (view != null) {
return ViewUtils.findTimeRulerCompartmentView(view);
}
return null;
}
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 == NotationPackage.eINSTANCE.getView_Visible()) {
refreshFigure();
}
}
}
/**
* Refreshes the "displayTimeRuler" attribute of the LifelineFigure so that it matches the visibility of the
* TimeRulerCompartment View.
*/
public void refreshFigure() {
final boolean visible = getListenedView().isVisible();
final IFigure figure = ((IGraphicalEditPart) getHost()).getFigure();
final LifelineFigure lifelineFigure = FigureUtils.findChildFigureInstance(figure, LifelineFigure.class);
lifelineFigure.setDisplayTimeRuler(visible);
}
}
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