bundles/core/org.eclipse.apogy.core.topology.ui/src/org/eclipse/apogy/core/topology/ui/parts/ApogySystem3dPart.java - gerrit/apogy/apogy - Git at Google

 /*******************************************************************************
  * 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 - initial API and implementation
  *
  * SPDX-License-Identifier: EPL-1.0
  *******************************************************************************/
 package org.eclipse.apogy.core.topology.ui.parts;

 import java.awt.image.BufferedImage;
 import java.util.HashMap;

 import javax.inject.Inject;

 import org.eclipse.apogy.common.ApogyCommonOSGiUtilities;
 import org.eclipse.apogy.common.emf.ui.parts.AbstractEObjectSelectionPart;
 import org.eclipse.apogy.common.images.AbstractEImage;
 import org.eclipse.apogy.common.images.ApogyCommonImagesFactory;
 import org.eclipse.apogy.common.images.EImage;
 import org.eclipse.apogy.common.images.EImagesUtilities;
 import org.eclipse.apogy.common.topology.ApogyCommonTopologyFactory;
 import org.eclipse.apogy.common.topology.Node;
 import org.eclipse.apogy.common.topology.ui.ApogyCommonTopologyUIFacade;
 import org.eclipse.apogy.common.topology.ui.GraphicsContext;
 import org.eclipse.apogy.common.topology.ui.NodeSelection;
 import org.eclipse.apogy.common.topology.ui.jme3.JME3Application;
 import org.eclipse.apogy.common.topology.ui.jme3.JME3RenderEngineDelegate;
 import org.eclipse.apogy.common.topology.ui.viewer.ApogyCommonTopologyUIViewerPackage;
 import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewer;
 import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewerProvider;
 import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewerRegistry;
 import org.eclipse.apogy.common.ui.composites.NoContentComposite;
 import org.eclipse.apogy.core.ApogySystem;
 import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIFacade;
 import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIPackage;
 import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIRCPConstants;
 import org.eclipse.apogy.core.topology.ui.DisplayedTopology;
 import org.eclipse.apogy.core.topology.ui.DisplayedTopologyChoice;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
 import org.eclipse.e4.ui.workbench.modeling.ISelectionListener;
 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.swt.SWT;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.MessageBox;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.progress.UIJob;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import com.jme3.math.ColorRGBA;

 public class ApogySystem3dPart extends AbstractEObjectSelectionPart implements TopologyViewerProvider {
 	private static final Logger Logger = LoggerFactory.getLogger(ApogySystem3dPart.class);

 	public static ColorRGBA VIEWER_BACKGROUND_COLOR = new ColorRGBA(145.0f / 255.0f, 233.0f / 255.0f, 1f, 1f);

 	protected ApogySystem apogySystem;
 	protected DisplayedTopology displayedTopology = DisplayedTopology.ASSEMBLY;

 	protected TopologyViewer topologyViewer;

 	private Adapter topologyTopologyViewerRegistryAdapter = null;
 	private Adapter editedApogySystemAssemblyRootAdapter = null;

 	private String currentDirectory = System.getProperty("user.dir");

 	@Inject
 	Shell shell;

 	@Override
 	public TopologyViewer getTopologyViewer() {
 		return this.topologyViewer;
 	}

 	/*
 	 * Takes a screenshot and prompts the user to identify the file type and the
 	 * filename.
 	 */
 	public void takeScreenshot() {
 		getTopologyViewer().takeScreenshot();

 		BufferedImage image = getTopologyViewer().takeScreenshot();
 		if (image != null) {
 			EImage eImage = ApogyCommonImagesFactory.eINSTANCE.createEImage();
 			eImage.setImageContent(image);

 			if (eImage != null) {
 				// Open pop-up and save.
 				FileDialog fileChooser = new FileDialog(this.shell, SWT.SAVE);
 				fileChooser.setText("Saves image to file");
 				fileChooser.setFilterPath(this.currentDirectory);
 				fileChooser.setFilterExtensions(new String[] { "*.png;" });
 				String filename = fileChooser.open();
 				if (filename != null) {
 					try {
 						if (filename.endsWith(".png")) {
 							saveImageInJob(eImage, filename, SWT.IMAGE_PNG);
 						} else {
 							String fileExtension = "";
 							if (filename.lastIndexOf(".") > 0) {
 								fileExtension = filename.substring(filename.lastIndexOf("."));
 							}
 							String message = "Failed to save the image. The specified file extension <" + fileExtension
 									+ "> is not supported.";

 							Logger.error(message);

 							MessageBox messageBox = new MessageBox(this.shell, SWT.ICON_ERROR | SWT.OK);
 							messageBox.setMessage(message);
 							messageBox.open();
 						}
 					} catch (Exception e) {
 						Logger.error("Unable to save image to file <" + filename + ">.");
 					}
 					this.currentDirectory = fileChooser.getFilterPath();
 				}
 			}
 		}
 	}

 	@Override
 	protected void setCompositeContents(EObject eObject) {
 		if (eObject instanceof ApogySystem) {
 			setApogySystem((ApogySystem) eObject);
 		} else if (eObject instanceof DisplayedTopologyChoice) {
 			DisplayedTopologyChoice displayedTopologyChoice = (DisplayedTopologyChoice) eObject;
 			setDisplayedTopology(displayedTopologyChoice.getDisplayedTopology());
 		}
 	}

 	@Override
 	protected HashMap<String, ISelectionListener> getSelectionProvidersIdsToSelectionListeners() {
 		HashMap<String, ISelectionListener> selectionProvidersIdsToSelectionListeners = new HashMap<String, ISelectionListener>();

 		// Selection from Apogy System File Editor
 		selectionProvidersIdsToSelectionListeners.put(ApogyCoreTopologyUIRCPConstants.PART__APOGY_SYSTEM_FILE_EDITOR_ID,
 				new ISelectionListener() {

 					@Override
 					public void selectionChanged(MPart mPart, Object object) {
 						if (object != null && object instanceof EObject) {
 							setEObject((EObject) object);
 						}
 					}
 				});

 		selectionProvidersIdsToSelectionListeners
 				.put(ApogyCoreTopologyUIRCPConstants.PART_APOGY_SYSTEM_TOPOLOGY_EDITOR_ID, new ISelectionListener() {

 					@Override
 					public void selectionChanged(MPart mPart, Object object) {
 						if (object != null && object instanceof EObject) {
 							setEObject((EObject) object);
 						}
 					}
 				});

 		return selectionProvidersIdsToSelectionListeners;
 	}

 	@Override
 	public void userPostConstruct(MPart mPart) {
 		ApogyCoreTopologyUIFacade.INSTANCE.eAdapters().add(getEditedApogySystemAssemblyRootAdapter());
 		super.userPostConstruct(mPart);
 	}

 	@Override
 	public void userPreDestroy(MPart mPart) {
 		ApogyCoreTopologyUIFacade.INSTANCE.eAdapters().remove(getEditedApogySystemAssemblyRootAdapter());
 		super.userPreDestroy(mPart);
 	}

 	protected void setApogySystem(ApogySystem newApogySystem) {
 		if (this.apogySystem != newApogySystem) {
 			this.apogySystem = newApogySystem;
 			updateDisplayedTopology();
 		}
 	}

 	protected void setDisplayedTopology(DisplayedTopology newDisplayedTopology) {
 		if (this.displayedTopology != newDisplayedTopology) {
 			this.displayedTopology = newDisplayedTopology;
 			updateDisplayedTopology();
 		}
 	}

 	private void updateDisplayedTopology() {
 		Node root = null;
 		switch (this.displayedTopology.getValue()) {
 		case DisplayedTopology.SYSTEM_VALUE: {
 			if (this.apogySystem != null && this.apogySystem.getTopologyRoot() != null) {
 				root = this.apogySystem.getTopologyRoot().getOriginNode();
 			}
 		}
 			break;

 		case DisplayedTopology.ASSEMBLY_VALUE: {
 			root = ApogyCoreTopologyUIFacade.INSTANCE.getEditedApogySystemAssemblyRoot();
 		}
 			break;

 		default:
 			break;
 		}

 		if (root == null) {
 			root = ApogyCommonTopologyFactory.eINSTANCE.createAggregateContentNode();
 		}

 		if (this.topologyViewer != null) {
 			GraphicsContext graphicsContext = ApogyCommonTopologyUIFacade.INSTANCE.createGraphicsContext(root);
 			this.topologyViewer.setInput(graphicsContext);
 		}
 	}

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

 	@Override
 	protected void createContentComposite(Composite parent, int style) {
 		JME3RenderEngineDelegate jme3RenderEngineDelegate = createJME3RenderEngineDelegate();
 		this.topologyViewer = new TopologyViewer(parent, jme3RenderEngineDelegate);

 		jme3RenderEngineDelegate.setMaximumFrameRate(this.topologyViewer.getMaximumFrameRate());
 		jme3RenderEngineDelegate.setAntiAliasing(this.topologyViewer.isAntiAliasingEnabled());
 		jme3RenderEngineDelegate.setShowStatisticsEnabled(this.topologyViewer.isShowStatisticsEnabled());
 		jme3RenderEngineDelegate.setAmbientLightEnabled(true);

 		// Listens for selection in the 3D viewer.
 		org.eclipse.apogy.common.topology.ui.viewer.Activator.getTopologyViewerRegistry().eAdapters()
 				.add(getTopologyTopologyViewerRegistryAdapter());
 	}

 	protected JME3RenderEngineDelegate createJME3RenderEngineDelegate() {
 		JME3RenderEngineDelegate engineDelegate = new JME3RenderEngineDelegate() {
 			@Override
 			protected JME3Application createJME3Application(Composite parent) {

 				JME3Application app = new JME3Application(parent) {
 					@Override
 					public void simpleInitApp() {
 						super.simpleInitApp();

 						// Sets the far clipping plane to 200m.
 						getCamera().setFrustumFar(100f);

 						getViewPort().setBackgroundColor(VIEWER_BACKGROUND_COLOR);
 					}

 					@Override
 					protected void initLighting() {
 						super.initLighting();
 					}
 				};
 				app.setJMERenderEngineDelegate(this);
 				return app;
 			}
 		};

 		return engineDelegate;
 	}

 	protected Adapter getEditedApogySystemAssemblyRootAdapter() {
 		if (this.editedApogySystemAssemblyRootAdapter == null) {
 			this.editedApogySystemAssemblyRootAdapter = new AdapterImpl() {
 				@Override
 				public void notifyChanged(Notification msg) {
 					if (msg.getNotifier() instanceof ApogyCoreTopologyUIFacade) {
 						int featureId = msg.getFeatureID(ApogyCoreTopologyUIFacade.class);
 						if (featureId == ApogyCoreTopologyUIPackage.APOGY_CORE_TOPOLOGY_UI_FACADE__EDITED_APOGY_SYSTEM_ASSEMBLY_ROOT) {
 							updateDisplayedTopology();
 						}
 					}
 				}
 			};
 		}
 		return this.editedApogySystemAssemblyRootAdapter;
 	}

 	private Adapter getTopologyTopologyViewerRegistryAdapter() {
 		if (this.topologyTopologyViewerRegistryAdapter == null) {
 			this.topologyTopologyViewerRegistryAdapter = new AdapterImpl() {
 				@Override
 				public void notifyChanged(Notification msg) {
 					if (msg.getNotifier() instanceof TopologyViewerRegistry) {
 						int featureId = msg.getFeatureID(TopologyViewerRegistry.class);

 						switch (featureId) {
 						case ApogyCommonTopologyUIViewerPackage.TOPOLOGY_VIEWER_REGISTRY__LATEST_NODE_SELECTION:

 							if (msg.getNewValue() instanceof NodeSelection) {
 								NodeSelection nodeSelection = (NodeSelection) msg.getNewValue();
 								ApogySystem3dPart.this.selectionService.setSelection(nodeSelection);
 							}

 							break;

 						default:
 							break;
 						}
 					}
 				}
 			};
 		}

 		return this.topologyTopologyViewerRegistryAdapter;
 	}

 	/*
 	 * Saves the current image to a file. This is done in a UIJob to keep the
 	 * desktop responsive in case of a long save process.
 	 *
 	 * @param fileName The destination file where to save the image.
 	 *
 	 * @param fileType The file type : SWT.IMAGE_JPEG or SWT.IMAGE_BMP or ...
 	 */
 	private void saveImageInJob(final AbstractEImage image, final String fileName, final int fileType) {
 		UIJob job = new UIJob("Save Image to file <" + fileName + ">") {
 			@Override
 			public IStatus runInUIThread(IProgressMonitor monitor) {
 				try {
 					// Save image.
 					if (fileType == SWT.IMAGE_JPEG) {
 						EImagesUtilities.INSTANCE.saveImageAsJPEG(fileName, image);
 					} else if (fileType == SWT.IMAGE_PNG) {
 						EImagesUtilities.INSTANCE.saveImageAsPNG(fileName, image);
 					}

 					Logger.info("Sucessfully saved image to file <" + fileName + ">.");
 					Status status = new Status(IStatus.OK, ApogyCommonOSGiUtilities.INSTANCE.getBundleSymbolicName(ApogySystem3dPart.this.getClass()),
 							"Sucessfully saved image to file <" + fileName + ">.");
 					return status;
 				} catch (Exception e) {
 					String message = "Failed to save the image to file <" + fileName
 							+ ">. The following exception was thrown : \n\n " + e.getMessage();

 					Logger.error(message, e);
 					Status status = new Status(IStatus.ERROR, ApogyCommonOSGiUtilities.INSTANCE.getBundleSymbolicName(ApogySystem3dPart.this.getClass()), message, e);
 					return status;
 				}
 			}
 		};
 		job.schedule();
 	}
 }
	/*******************************************************************************
	* 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 - initial API and implementation
	*
	* SPDX-License-Identifier: EPL-1.0
	*******************************************************************************/
	package org.eclipse.apogy.core.topology.ui.parts;

	import java.awt.image.BufferedImage;
	import java.util.HashMap;

	import javax.inject.Inject;

	import org.eclipse.apogy.common.ApogyCommonOSGiUtilities;
	import org.eclipse.apogy.common.emf.ui.parts.AbstractEObjectSelectionPart;
	import org.eclipse.apogy.common.images.AbstractEImage;
	import org.eclipse.apogy.common.images.ApogyCommonImagesFactory;
	import org.eclipse.apogy.common.images.EImage;
	import org.eclipse.apogy.common.images.EImagesUtilities;
	import org.eclipse.apogy.common.topology.ApogyCommonTopologyFactory;
	import org.eclipse.apogy.common.topology.Node;
	import org.eclipse.apogy.common.topology.ui.ApogyCommonTopologyUIFacade;
	import org.eclipse.apogy.common.topology.ui.GraphicsContext;
	import org.eclipse.apogy.common.topology.ui.NodeSelection;
	import org.eclipse.apogy.common.topology.ui.jme3.JME3Application;
	import org.eclipse.apogy.common.topology.ui.jme3.JME3RenderEngineDelegate;
	import org.eclipse.apogy.common.topology.ui.viewer.ApogyCommonTopologyUIViewerPackage;
	import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewer;
	import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewerProvider;
	import org.eclipse.apogy.common.topology.ui.viewer.TopologyViewerRegistry;
	import org.eclipse.apogy.common.ui.composites.NoContentComposite;
	import org.eclipse.apogy.core.ApogySystem;
	import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIFacade;
	import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIPackage;
	import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIRCPConstants;
	import org.eclipse.apogy.core.topology.ui.DisplayedTopology;
	import org.eclipse.apogy.core.topology.ui.DisplayedTopologyChoice;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.e4.ui.model.application.ui.basic.MPart;
	import org.eclipse.e4.ui.workbench.modeling.ISelectionListener;
	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.swt.SWT;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.FileDialog;
	import org.eclipse.swt.widgets.MessageBox;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.progress.UIJob;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import com.jme3.math.ColorRGBA;

	public class ApogySystem3dPart extends AbstractEObjectSelectionPart implements TopologyViewerProvider {
	private static final Logger Logger = LoggerFactory.getLogger(ApogySystem3dPart.class);

	public static ColorRGBA VIEWER_BACKGROUND_COLOR = new ColorRGBA(145.0f / 255.0f, 233.0f / 255.0f, 1f, 1f);

	protected ApogySystem apogySystem;
	protected DisplayedTopology displayedTopology = DisplayedTopology.ASSEMBLY;

	protected TopologyViewer topologyViewer;

	private Adapter topologyTopologyViewerRegistryAdapter = null;
	private Adapter editedApogySystemAssemblyRootAdapter = null;

	private String currentDirectory = System.getProperty("user.dir");

	@Inject
	Shell shell;

	@Override
	public TopologyViewer getTopologyViewer() {
	return this.topologyViewer;
	}

	/*
	* Takes a screenshot and prompts the user to identify the file type and the
	* filename.
	*/
	public void takeScreenshot() {
	getTopologyViewer().takeScreenshot();

	BufferedImage image = getTopologyViewer().takeScreenshot();
	if (image != null) {
	EImage eImage = ApogyCommonImagesFactory.eINSTANCE.createEImage();
	eImage.setImageContent(image);

	if (eImage != null) {
	// Open pop-up and save.
	FileDialog fileChooser = new FileDialog(this.shell, SWT.SAVE);
	fileChooser.setText("Saves image to file");
	fileChooser.setFilterPath(this.currentDirectory);
	fileChooser.setFilterExtensions(new String[] { "*.png;" });
	String filename = fileChooser.open();
	if (filename != null) {
	try {
	if (filename.endsWith(".png")) {
	saveImageInJob(eImage, filename, SWT.IMAGE_PNG);
	} else {
	String fileExtension = "";
	if (filename.lastIndexOf(".") > 0) {
	fileExtension = filename.substring(filename.lastIndexOf("."));
	}
	String message = "Failed to save the image. The specified file extension <" + fileExtension
	+ "> is not supported.";

	Logger.error(message);

	MessageBox messageBox = new MessageBox(this.shell, SWT.ICON_ERROR \| SWT.OK);
	messageBox.setMessage(message);
	messageBox.open();
	}
	} catch (Exception e) {
	Logger.error("Unable to save image to file <" + filename + ">.");
	}
	this.currentDirectory = fileChooser.getFilterPath();
	}
	}
	}
	}

	@Override
	protected void setCompositeContents(EObject eObject) {
	if (eObject instanceof ApogySystem) {
	setApogySystem((ApogySystem) eObject);
	} else if (eObject instanceof DisplayedTopologyChoice) {
	DisplayedTopologyChoice displayedTopologyChoice = (DisplayedTopologyChoice) eObject;
	setDisplayedTopology(displayedTopologyChoice.getDisplayedTopology());
	}
	}

	@Override
	protected HashMap<String, ISelectionListener> getSelectionProvidersIdsToSelectionListeners() {
	HashMap<String, ISelectionListener> selectionProvidersIdsToSelectionListeners = new HashMap<String, ISelectionListener>();

	// Selection from Apogy System File Editor
	selectionProvidersIdsToSelectionListeners.put(ApogyCoreTopologyUIRCPConstants.PART__APOGY_SYSTEM_FILE_EDITOR_ID,
	new ISelectionListener() {

	@Override
	public void selectionChanged(MPart mPart, Object object) {
	if (object != null && object instanceof EObject) {
	setEObject((EObject) object);
	}
	}
	});

	selectionProvidersIdsToSelectionListeners
	.put(ApogyCoreTopologyUIRCPConstants.PART_APOGY_SYSTEM_TOPOLOGY_EDITOR_ID, new ISelectionListener() {

	@Override
	public void selectionChanged(MPart mPart, Object object) {
	if (object != null && object instanceof EObject) {
	setEObject((EObject) object);
	}
	}
	});

	return selectionProvidersIdsToSelectionListeners;
	}

	@Override
	public void userPostConstruct(MPart mPart) {
	ApogyCoreTopologyUIFacade.INSTANCE.eAdapters().add(getEditedApogySystemAssemblyRootAdapter());
	super.userPostConstruct(mPart);
	}

	@Override
	public void userPreDestroy(MPart mPart) {
	ApogyCoreTopologyUIFacade.INSTANCE.eAdapters().remove(getEditedApogySystemAssemblyRootAdapter());
	super.userPreDestroy(mPart);
	}

	protected void setApogySystem(ApogySystem newApogySystem) {
	if (this.apogySystem != newApogySystem) {
	this.apogySystem = newApogySystem;
	updateDisplayedTopology();
	}
	}

	protected void setDisplayedTopology(DisplayedTopology newDisplayedTopology) {
	if (this.displayedTopology != newDisplayedTopology) {
	this.displayedTopology = newDisplayedTopology;
	updateDisplayedTopology();
	}
	}

	private void updateDisplayedTopology() {
	Node root = null;
	switch (this.displayedTopology.getValue()) {
	case DisplayedTopology.SYSTEM_VALUE: {
	if (this.apogySystem != null && this.apogySystem.getTopologyRoot() != null) {
	root = this.apogySystem.getTopologyRoot().getOriginNode();
	}
	}
	break;

	case DisplayedTopology.ASSEMBLY_VALUE: {
	root = ApogyCoreTopologyUIFacade.INSTANCE.getEditedApogySystemAssemblyRoot();
	}
	break;

	default:
	break;
	}

	if (root == null) {
	root = ApogyCommonTopologyFactory.eINSTANCE.createAggregateContentNode();
	}

	if (this.topologyViewer != null) {
	GraphicsContext graphicsContext = ApogyCommonTopologyUIFacade.INSTANCE.createGraphicsContext(root);
	this.topologyViewer.setInput(graphicsContext);
	}
	}

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

	@Override
	protected void createContentComposite(Composite parent, int style) {
	JME3RenderEngineDelegate jme3RenderEngineDelegate = createJME3RenderEngineDelegate();
	this.topologyViewer = new TopologyViewer(parent, jme3RenderEngineDelegate);

	jme3RenderEngineDelegate.setMaximumFrameRate(this.topologyViewer.getMaximumFrameRate());
	jme3RenderEngineDelegate.setAntiAliasing(this.topologyViewer.isAntiAliasingEnabled());
	jme3RenderEngineDelegate.setShowStatisticsEnabled(this.topologyViewer.isShowStatisticsEnabled());
	jme3RenderEngineDelegate.setAmbientLightEnabled(true);

	// Listens for selection in the 3D viewer.
	org.eclipse.apogy.common.topology.ui.viewer.Activator.getTopologyViewerRegistry().eAdapters()
	.add(getTopologyTopologyViewerRegistryAdapter());
	}

	protected JME3RenderEngineDelegate createJME3RenderEngineDelegate() {
	JME3RenderEngineDelegate engineDelegate = new JME3RenderEngineDelegate() {
	@Override
	protected JME3Application createJME3Application(Composite parent) {

	JME3Application app = new JME3Application(parent) {
	@Override
	public void simpleInitApp() {
	super.simpleInitApp();

	// Sets the far clipping plane to 200m.
	getCamera().setFrustumFar(100f);

	getViewPort().setBackgroundColor(VIEWER_BACKGROUND_COLOR);
	}

	@Override
	protected void initLighting() {
	super.initLighting();
	}
	};
	app.setJMERenderEngineDelegate(this);
	return app;
	}
	};

	return engineDelegate;
	}

	protected Adapter getEditedApogySystemAssemblyRootAdapter() {
	if (this.editedApogySystemAssemblyRootAdapter == null) {
	this.editedApogySystemAssemblyRootAdapter = new AdapterImpl() {
	@Override
	public void notifyChanged(Notification msg) {
	if (msg.getNotifier() instanceof ApogyCoreTopologyUIFacade) {
	int featureId = msg.getFeatureID(ApogyCoreTopologyUIFacade.class);
	if (featureId == ApogyCoreTopologyUIPackage.APOGY_CORE_TOPOLOGY_UI_FACADE__EDITED_APOGY_SYSTEM_ASSEMBLY_ROOT) {
	updateDisplayedTopology();
	}
	}
	}
	};
	}
	return this.editedApogySystemAssemblyRootAdapter;
	}

	private Adapter getTopologyTopologyViewerRegistryAdapter() {
	if (this.topologyTopologyViewerRegistryAdapter == null) {
	this.topologyTopologyViewerRegistryAdapter = new AdapterImpl() {
	@Override
	public void notifyChanged(Notification msg) {
	if (msg.getNotifier() instanceof TopologyViewerRegistry) {
	int featureId = msg.getFeatureID(TopologyViewerRegistry.class);

	switch (featureId) {
	case ApogyCommonTopologyUIViewerPackage.TOPOLOGY_VIEWER_REGISTRY__LATEST_NODE_SELECTION:

	if (msg.getNewValue() instanceof NodeSelection) {
	NodeSelection nodeSelection = (NodeSelection) msg.getNewValue();
	ApogySystem3dPart.this.selectionService.setSelection(nodeSelection);
	}

	break;

	default:
	break;
	}
	}
	}
	};
	}

	return this.topologyTopologyViewerRegistryAdapter;
	}

	/*
	* Saves the current image to a file. This is done in a UIJob to keep the
	* desktop responsive in case of a long save process.
	*
	* @param fileName The destination file where to save the image.
	*
	* @param fileType The file type : SWT.IMAGE_JPEG or SWT.IMAGE_BMP or ...
	*/
	private void saveImageInJob(final AbstractEImage image, final String fileName, final int fileType) {
	UIJob job = new UIJob("Save Image to file <" + fileName + ">") {
	@Override
	public IStatus runInUIThread(IProgressMonitor monitor) {
	try {
	// Save image.
	if (fileType == SWT.IMAGE_JPEG) {
	EImagesUtilities.INSTANCE.saveImageAsJPEG(fileName, image);
	} else if (fileType == SWT.IMAGE_PNG) {
	EImagesUtilities.INSTANCE.saveImageAsPNG(fileName, image);
	}

	Logger.info("Sucessfully saved image to file <" + fileName + ">.");
	Status status = new Status(IStatus.OK, ApogyCommonOSGiUtilities.INSTANCE.getBundleSymbolicName(ApogySystem3dPart.this.getClass()),
	"Sucessfully saved image to file <" + fileName + ">.");
	return status;
	} catch (Exception e) {
	String message = "Failed to save the image to file <" + fileName
	+ ">. The following exception was thrown : \n\n " + e.getMessage();

	Logger.error(message, e);
	Status status = new Status(IStatus.ERROR, ApogyCommonOSGiUtilities.INSTANCE.getBundleSymbolicName(ApogySystem3dPart.this.getClass()), message, e);
	return status;
	}
	}
	};
	job.schedule();
	}
	}