bundles/core/org.eclipse.apogy.core.environment.ui/src/org/eclipse/apogy/core/environment/ui/parts/TimeSourcesListPart.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * 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:
 *     Pierre Allard,
 *     Regent L'Archeveque - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.core.environment.ui.parts;

import org.eclipse.apogy.common.emf.ui.parts.AbstractPart;
import org.eclipse.apogy.common.ui.composites.NoContentComposite;
import org.eclipse.apogy.core.environment.ApogyCoreEnvironmentFacade;
import org.eclipse.apogy.core.environment.ApogyCoreEnvironmentPackage;
import org.eclipse.apogy.core.environment.ApogyEnvironment;
import org.eclipse.apogy.core.environment.ui.composites.TimeSourcesListComposite;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

public class TimeSourcesListPart extends AbstractPart {
	private TimeSourcesListComposite timeSourcesListComposite;
	private Adapter adapter = null;

	public TimeSourcesListPart() {
		// Register adapter to listens for changes in the active apogy environment.
		ApogyCoreEnvironmentFacade.INSTANCE.eAdapters().add(getApogyCoreEnvironmentFacadeAdapter());
	}

	@Override
	protected EObject getInitializeObject() {

		return ApogyCoreEnvironmentFacade.INSTANCE.getActiveApogyEnvironment();
	}

	@Override
	protected void setCompositeContent(EObject eObject) {
		if (eObject instanceof ApogyEnvironment) {
			// Sets the current Apogy Environment.
			this.timeSourcesListComposite.setTimeSourcesList(((ApogyEnvironment) eObject).getTimeSourcesList());
		} else {
			this.timeSourcesListComposite.setTimeSourcesList(null);
		}
	}

	@Override
	protected void createNoContentComposite(Composite parent, int style) {
		new NoContentComposite(parent, SWT.None) {
			@Override
			protected String getMessage() {
				return "No active Apogy Environment";
			}
		};
	}

	@Override
	protected void createContentComposite(Composite parent, int style) {
		this.timeSourcesListComposite = new TimeSourcesListComposite(parent, style) {
			@Override
			protected void newSelection(TreeSelection selection) {
				TimeSourcesListPart.this.selectionService
						.setSelection(((TimeSourcesListComposite) getActualComposite()).getSelectedTimeSource());
			}
		};
	}

	@Override
	public void dispose() {
		// Un-Register adapter to listens for changes in the active apogy environment.
		ApogyCoreEnvironmentFacade.INSTANCE.eAdapters().remove(getApogyCoreEnvironmentFacadeAdapter());
		super.dispose();
	}

	private Adapter getApogyCoreEnvironmentFacadeAdapter() {
		if (this.adapter == null) {
			this.adapter = new AdapterImpl() {
				@Override
				public void notifyChanged(Notification msg) {
					if (msg.getNotifier() instanceof ApogyCoreEnvironmentFacade) {
						int featureID = msg.getFeatureID(ApogyCoreEnvironmentFacade.class);
						switch (featureID) {
						case ApogyCoreEnvironmentPackage.APOGY_CORE_ENVIRONMENT_FACADE__ACTIVE_APOGY_ENVIRONMENT: {
							if (msg.getNewValue() instanceof ApogyEnvironment) {
								setEObject((ApogyEnvironment) msg.getNewValue());
							} else {
								setEObject(null);
							}
						}
							break;

						default:
							break;
						}
					}
				}
			};
		}

		return this.adapter;
	}

}