bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/sg/DiagramSceneGraphProvider.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.sg;
  13
  14 import java.awt.Color;
  15 import java.awt.event.AWTEventListener;
  16
  17 import org.eclipse.core.runtime.NullProgressMonitor;
  18 import org.simantics.Simantics;
  19 import org.simantics.databoard.Bindings;
  20 import org.simantics.db.ReadGraph;
  21 import org.simantics.db.Resource;
  22 import org.simantics.db.common.ResourceArray;
  23 import org.simantics.db.common.primitiverequest.PossibleAdapter;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.db.exception.ManyObjectsForFunctionalRelationException;
  26 import org.simantics.db.exception.NoSingleResultException;
  27 import org.simantics.db.exception.ServiceException;
  28 import org.simantics.db.management.ISessionContext;
  29 import org.simantics.db.procedure.Listener;
  30 import org.simantics.db.request.Read;
  31 import org.simantics.diagram.adapter.DefaultConnectionClassFactory;
  32 import org.simantics.diagram.adapter.FlagClassFactory;
  33 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;
  34 import org.simantics.diagram.handler.CopyPasteHandler;
  35 import org.simantics.diagram.handler.CopyPasteStrategy;
  36 import org.simantics.diagram.handler.DefaultCopyPasteStrategy;
  37 import org.simantics.diagram.handler.DeleteHandler;
  38 import org.simantics.diagram.handler.SimpleElementTransformHandler;
  39 import org.simantics.diagram.query.DiagramRequests;
  40 import org.simantics.diagram.runtime.RuntimeDiagramManager;
  41 import org.simantics.diagram.stubs.DiagramResource;
  42 import org.simantics.diagram.synchronization.CopyAdvisor;
  43 import org.simantics.diagram.synchronization.SynchronizationHints;
  44 import org.simantics.diagram.ui.DiagramModelHints;
  45 import org.simantics.g2d.canvas.Hints;
  46 import org.simantics.g2d.canvas.ICanvasContext;
  47 import org.simantics.g2d.canvas.impl.CanvasContext;
  48 import org.simantics.g2d.diagram.DiagramHints;
  49 import org.simantics.g2d.diagram.IDiagram;
  50 import org.simantics.g2d.diagram.participant.DiagramParticipant;
  51 import org.simantics.g2d.diagram.participant.ElementInteractor;
  52 import org.simantics.g2d.diagram.participant.ElementPainter;
  53 import org.simantics.g2d.diagram.participant.Selection;
  54 import org.simantics.g2d.diagram.participant.ZOrderHandler;
  55 import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
  56 import org.simantics.g2d.element.ElementClassProviders;
  57 import org.simantics.g2d.element.ElementClasses;
  58 import org.simantics.g2d.element.IElementClassProvider;
  59 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  60 import org.simantics.g2d.multileveldiagram.TransitionFunction;
  61 import org.simantics.g2d.multileveldiagram.ZoomTransitionParticipant;
  62 import org.simantics.g2d.page.DiagramDesc;
  63 import org.simantics.g2d.participant.BackgroundPainter;
  64 import org.simantics.g2d.participant.CanvasBoundsParticipant;
  65 import org.simantics.g2d.participant.CanvasGrab;
  66 import org.simantics.g2d.participant.GridPainter;
  67 import org.simantics.g2d.participant.KeyToCommand;
  68 import org.simantics.g2d.participant.KeyUtil;
  69 import org.simantics.g2d.participant.MouseUtil;
  70 import org.simantics.g2d.participant.MultitouchPanZoomRotateInteractor;
  71 import org.simantics.g2d.participant.Notifications;
  72 import org.simantics.g2d.participant.PageBorderParticipant;
  73 import org.simantics.g2d.participant.PanZoomRotateHandler;
  74 import org.simantics.g2d.participant.PointerPainter;
  75 import org.simantics.g2d.participant.RulerPainter;
  76 import org.simantics.g2d.participant.SymbolUtil;
  77 import org.simantics.g2d.participant.TimeParticipant;
  78 import org.simantics.g2d.participant.TransformUtil;
  79 import org.simantics.g2d.participant.ZoomToAreaHandler;
  80 import org.simantics.g2d.scenegraph.ICanvasSceneGraphProvider;
  81 import org.simantics.modeling.ModelingResources;
  82 import org.simantics.modeling.mapping.ComponentCopyAdvisor;
  83 import org.simantics.modeling.mapping.ElementCopyAdvisor;
  84 import org.simantics.modeling.mapping.MappedElementCopyAdvisor;
  85 import org.simantics.modeling.mapping.ModelingSynchronizationHints;
  86 import org.simantics.modeling.ui.diagramEditor.PopulateElementDropParticipant;
  87 import org.simantics.modeling.ui.diagramEditor.PopulateElementMonitorDropParticipant;
  88 import org.simantics.modeling.ui.diagramEditor.handlers.HeadlessStructuralBrowsingHandler;
  89 import org.simantics.modeling.ui.diagramEditor.handlers.HeadlessStructuralBrowsingHandler.IDiagramUpdateSupport;
  90 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  91 import org.simantics.scenegraph.g2d.events.adapter.AWTRemoteEventAdapter;
  92 import org.simantics.scenegraph.g2d.events.command.CommandKeyBinding;
  93 import org.simantics.structural.stubs.StructuralResource2;
  94 import org.simantics.structural2.modelingRules.IModelingRules;
  95 import org.simantics.utils.datastructures.hints.HintContext;
  96 import org.simantics.utils.datastructures.hints.IHintContext;
  97 import org.simantics.utils.page.PageDesc;
  98 import org.simantics.utils.page.PageOrientation;
  99 import org.simantics.utils.threads.AWTThread;
 100 import org.simantics.utils.threads.IThreadWorkQueue;
 101 import org.simantics.utils.threads.ThreadUtils;
 102 import org.simantics.utils.ui.ErrorLogger;
 103
 104
 105 /**
 106  * ISceneGraphProvider implementation for diagrams.
 107  * TODO: decide if this should be stateless or stateful class
 108  *
 109  * @author J-P Laine
 110  *
 111  */
 112 public class DiagramSceneGraphProvider implements ICanvasSceneGraphProvider, IDiagramUpdateSupport {
 113
 114         protected boolean isSymbol = false;
 115     protected Resource resource;
 116     protected ResourceArray structuralPath = null;
 117     protected IDiagram diagram = null;
 118     protected CanvasContext ctx = null;
 119     protected boolean ownsContext = false;
 120     protected GraphToDiagramSynchronizer synchronizer = null;
 121     protected String view = null;
 122     protected Boolean navigation = null;
 123
 124     protected AWTRemoteEventAdapter listener = null;
 125
 126     final IHintContext initialHints = new HintContext();
 127
 128     public DiagramSceneGraphProvider(ReadGraph g, final Resource diagramOrComposite) {
 129         this.structuralPath = new ResourceArray();
 130         try {
 131
 132             StructuralResource2 sr = StructuralResource2.getInstance(g);
 133                 DiagramResource DIA = DiagramResource.getInstance(g);
 134
 135                 Resource diagram = diagramOrComposite;
 136                 if(!g.isInstanceOf(diagram, DIA.Composite)) {
 137
 138                 ModelingResources mr = ModelingResources.getInstance(g);
 139                         diagram = g.getPossibleObject(diagramOrComposite, mr.CompositeToDiagram);
 140                         if(diagram == null) {
 141                     // looks like we have a component without direct relation to composite.. try to solve this
 142                     // FIXME: use adapter to get composite directly from resource
 143                     final Resource type = g.getSingleType(diagramOrComposite, sr.Component);
 144                     if (type == null)
 145                         return;
 146
 147                     final Resource definedBy = g.getPossibleObject(type, sr.IsDefinedBy);
 148                     if (definedBy == null)
 149                         return;
 150
 151                     this.structuralPath = new ResourceArray(diagramOrComposite);
 152                     diagram =  g.getPossibleObject(definedBy, mr.CompositeToDiagram);
 153                         }
 154
 155                 } else {
 156
 157                         Resource possibleSymbol = g.getPossibleObject(diagram, sr.Defines);
 158                         if(possibleSymbol != null && g.isInstanceOf(possibleSymbol, DIA.ElementClass)) isSymbol = true;
 159
 160                 }
 161
 162                         this.resource = diagram;
 163
 164         } catch (ManyObjectsForFunctionalRelationException e) {
 165             // TODO Auto-generated catch block
 166             e.printStackTrace();
 167         } catch (ServiceException e) {
 168             // TODO Auto-generated catch block
 169             e.printStackTrace();
 170         } catch (NoSingleResultException e) {
 171             // TODO Auto-generated catch block
 172             e.printStackTrace();
 173         }
 174     }
 175
 176     public GraphToDiagramSynchronizer getGraphToDiagramSynchronizer() {
 177         return synchronizer;
 178     }
 179
 180     protected CopyPasteStrategy getCopyPasteStrategy() {
 181                 try {
 182                         CopyPasteStrategy cpStrategy = Simantics.getSession().syncRequest(new PossibleAdapter<CopyPasteStrategy>(resource, CopyPasteStrategy.class));
 183                         if(cpStrategy != null) return cpStrategy;
 184                 } catch (DatabaseException e) {
 185                 }
 186                 return new DefaultCopyPasteStrategy();
 187     }
 188
 189     protected CopyAdvisor getCopyAdvisor() {
 190                 try {
 191                         CopyAdvisor advisor = Simantics.getSession().syncRequest(new PossibleAdapter<CopyAdvisor>(resource, CopyAdvisor.class));
 192                         if(advisor != null) return advisor;
 193                 } catch (DatabaseException e) {
 194                 }
 195                 return new MappedElementCopyAdvisor(new ElementCopyAdvisor(), new ComponentCopyAdvisor());
 196     }
 197
 198     protected void initContext(CanvasContext ctx) {
 199         boolean unlock = false;
 200         if (!ctx.isLocked()) {
 201             ctx.setLocked(true);
 202             unlock = true;
 203         }
 204
 205         IHintContext h = ctx.getDefaultHintContext();
 206
 207         // Support & Util Participants
 208         ctx.add( new TransformUtil() );
 209         ctx.add( new MouseUtil() );
 210         ctx.add( new KeyUtil() );
 211         ctx.add( new CanvasGrab() );
 212         ctx.add( new SymbolUtil() );
 213         ctx.add( new TimeParticipant() );
 214         ctx.add( new CanvasBoundsParticipant() );
 215         ctx.add( new Notifications() );
 216
 217         // SGFocusParticipant does not work for remote viewer at the moment.
 218         //ctx.add( new SGFocusParticipant() );
 219
 220         h.setHint(PointerPainter.KEY_PAINT_POINTER, true);
 221
 222         ctx.add( new PanZoomRotateHandler(navigation == null || navigation == true) );
 223         ctx.add( new MultitouchPanZoomRotateInteractor() );
 224         ctx.add( new ZoomToAreaHandler() );
 225         ctx.add( new SimpleElementTransformHandler() );
 226
 227         // Key bindings
 228         if(navigation == null || navigation == true)
 229             ctx.add( new KeyToCommand( CommandKeyBinding.DEFAULT_BINDINGS ) );
 230
 231         // Grid & Ruler & Background
 232         h.setHint(RulerPainter.KEY_RULER_ENABLED, false);
 233         h.setHint(GridPainter.KEY_GRID_ENABLED, false);
 234
 235         ctx.add( new GridPainter() );
 236         ctx.add( new RulerPainter() );
 237         ctx.add( new BackgroundPainter() );
 238
 239         h.setHint(Hints.KEY_DISPLAY_PAGE, Boolean.FALSE);
 240         h.setHint(Hints.KEY_DISPLAY_MARGINS, Boolean.TRUE);
 241         ctx.add( new PageBorderParticipant() );
 242
 243         h.setHint(Hints.KEY_GRID_COLOR, new Color(0.95f, 0.95f, 0.95f));
 244         h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.WHITE);
 245         h.setHint(RulerPainter.KEY_RULER_BACKGROUND_COLOR, new Color(0.9f, 0.9f, 0.9f, 0.75f));
 246         h.setHint(RulerPainter.KEY_RULER_TEXT_COLOR, Color.BLACK);
 247
 248         ////// Diagram Participants //////
 249         ctx.add( new PointerInteractor(false, false, false, false, true, true, synchronizer.getElementClassProvider(), null) );
 250         ctx.add( new ElementInteractor() );
 251         ctx.add( new Selection() );
 252         ctx.add( new DiagramParticipant() );
 253         ctx.add( new ElementPainter(true) );
 254
 255         //ctx.add( new ElementHeartbeater() );
 256         ctx.add( new ZOrderHandler() );
 257         ctx.add( new ZoomTransitionParticipant(TransitionFunction.SIGMOID) );
 258
 259         /////// D'n'D ///////
 260         ctx.add(new PopulateElementDropParticipant(synchronizer));
 261         ctx.add(new PopulateElementMonitorDropParticipant(synchronizer, 0.5, 0.5));
 262
 263         h.setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 264
 265         h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 1000.0);
 266         h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 10.0);
 267
 268         // Add visual browsing capabilities for structural models
 269         ISessionContext sessionContext = Simantics.getSessionContext();
 270         ctx.add(new HeadlessStructuralBrowsingHandler(this, sessionContext, structuralPath));
 271
 272         // Page settings
 273         PageDesc pageDesc = PageDesc.DEFAULT.withOrientation(PageOrientation.Landscape);
 274         // TODO: load page desc from graph
 275         h.setHint(Hints.KEY_PAGE_DESC, pageDesc);
 276
 277         ctx.add(new CopyPasteHandler(getCopyPasteStrategy()));
 278         ctx.add(new DeleteHandler(null));
 279
 280         if (resource != null)
 281             loadPageSettings(ctx, resource);
 282
 283         ctx.assertParticipantDependencies();
 284         if (unlock)
 285             ctx.setLocked(false);
 286     }
 287
 288     protected void loadPageSettings(ICanvasContext ctx, Resource diagramResource) {
 289         try {
 290             DiagramDesc diagramDesc = Simantics.getSession().syncRequest(DiagramRequests.getDiagramDesc(diagramResource));
 291             if (diagramDesc != null)
 292                 setDiagramDesc(ctx, diagramDesc);
 293
 294             // Create a listener to react to page setting changes.
 295             Simantics.getSession().asyncRequest(DiagramRequests.getDiagramDesc(diagramResource), new Listener<DiagramDesc>() {
 296                 @Override
 297                 public void execute(DiagramDesc result) {
 298                     if (result != null && ctx != null) {
 299                         ThreadUtils.asyncExec(ctx.getThreadAccess(), () -> {
 300                             if (ctx != null) {
 301                                 setDiagramDesc(ctx, result);
 302                             }
 303                         });
 304                     }
 305                 }
 306
 307                 @Override
 308                 public void exception(Throwable t) {
 309                     ErrorLogger.defaultLogError(t);
 310                 }
 311
 312                 @Override
 313                 public boolean isDisposed() {
 314                     return DiagramSceneGraphProvider.this.ctx == null;
 315                 }
 316             });
 317         } catch (DatabaseException e) {
 318             ErrorLogger.defaultLogError(e);
 319         }
 320     }
 321
 322     protected void setDiagramDesc(ICanvasContext ctx, DiagramDesc diagramDesc) {
 323         IHintContext hints = ctx.getDefaultHintContext();
 324         hints.setHint(Hints.KEY_PAGE_DESC, diagramDesc.getPageDesc());
 325         hints.setHint(Hints.KEY_DISPLAY_PAGE, diagramDesc.isPageBordersVisible());
 326         hints.setHint(Hints.KEY_DISPLAY_MARGINS, diagramDesc.isMarginsVisible());
 327     }
 328
 329     @Override
 330     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg) {
 331         return initializeSceneGraph(sg, null);
 332     }
 333
 334     @Override
 335     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String view) {
 336         return initializeSceneGraph(sg, "", "", view);
 337     }
 338
 339     @Override
 340     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String modelURI, String RVI) {
 341         return initializeSceneGraph(sg, modelURI, RVI, "");
 342     }
 343
 344     @Override
 345     public G2DSceneGraph initializeSceneGraph(ICanvasContext context, String modelURI, String RVI) {
 346         G2DSceneGraph sg = context.getSceneGraph();
 347         return initializeSceneGraph(context, sg, modelURI, RVI, "");
 348     }
 349
 350     /**
 351      * @param sg
 352      * @param view
 353      * @param initialHints
 354      * @return
 355      */
 356     private G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String modelURI, String RVI, String view) {
 357         IThreadWorkQueue thread = AWTThread.getThreadAccess();
 358         ctx = new CanvasContext(thread, sg); // By giving the scene graph instance as parameter, we can use external serializer
 359         return initializeSceneGraph(ctx, sg, modelURI, RVI, view);
 360     }
 361
 362     /**
 363      * @param sg
 364      * @param view
 365      * @param initialHints
 366      * @return
 367      */
 368     private G2DSceneGraph initializeSceneGraph(ICanvasContext context, G2DSceneGraph sg, String modelURI, String RVI, String view) {
 369         this.ctx = (CanvasContext) context;
 370         this.view = view;
 371         if(view != null) {
 372             //System.out.println("using layer '"+view+"'");
 373             initialHints.setHint(DiagramHints.KEY_FIXED_LAYERS, new String[] { view });
 374         }
 375
 376         try {
 377                 fillInitialDiagramHints(initialHints);
 378
 379             final RuntimeDiagramManager runtimeDiagramManager = RuntimeDiagramManager.create(Simantics.getSession(), resource, modelURI, RVI);
 380
 381             synchronizer = Simantics.getSession().syncRequest(new Read<GraphToDiagramSynchronizer>() {
 382                 @Override
 383                 public GraphToDiagramSynchronizer perform(ReadGraph graph) throws DatabaseException {
 384                     DiagramResource dr = DiagramResource.getInstance(graph);
 385                     Boolean val = graph.getPossibleRelatedValue(resource, dr.NavigationEnabled, Bindings.BOOLEAN);
 386                     if(val != null && navigation == null) { // Set only if navigation has not been set manually
 387                         navigation = val;
 388                     }
 389                     GraphToDiagramSynchronizer sync = new GraphToDiagramSynchronizer(graph, ctx,createElementClassProvider(graph));
 390
 391                     sync.set(ModelingSynchronizationHints.MODELING_RESOURCE, ModelingResources.getInstance(graph));
 392                     diagram = sync.loadDiagram(new NullProgressMonitor(), graph, null, resource, runtimeDiagramManager.getRuntimeDiagram(), structuralPath, initialHints); // FIXME
 393                     return sync;
 394                 }
 395             });
 396
 397         } catch (DatabaseException e) {
 398             // TODO Auto-generated catch block
 399             e.printStackTrace();
 400         }
 401         ctx.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, diagram);
 402
 403         initContext(ctx);
 404
 405         return ctx.getSceneGraph();
 406     }
 407
 408     protected void fillInitialDiagramHints(IHintContext initialHints) throws DatabaseException {
 409           IModelingRules modelingRules = Simantics.getSession().syncRequest(DiagramRequests.getModelingRules(resource, null));
 410           if (modelingRules != null) {
 411               initialHints.setHint(DiagramModelHints.KEY_MODELING_RULES, modelingRules);
 412           }
 413
 414           initialHints.setHint(SynchronizationHints.COPY_ADVISOR, getCopyAdvisor());
 415     }
 416
 417     protected IElementClassProvider createElementClassProvider(ReadGraph graph) throws DatabaseException {
 418         DiagramResource dr = DiagramResource.getInstance(graph);
 419         return ElementClassProviders.mappedProvider(
 420                   ElementClasses.CONNECTION, DefaultConnectionClassFactory.CLASS.newClassWith(new StaticObjectAdapter(dr.Connection)),
 421                   ElementClasses.FLAG, FlagClassFactory.createFlagClass(dr.Flag, dr.Flag_Terminal)
 422         );
 423
 424     }
 425
 426     @Override
 427     public void dispose() {
 428         if(ctx != null) {
 429             if (ownsContext)
 430                 ctx.dispose();
 431             ctx = null;
 432         }
 433         if (synchronizer != null) {
 434             synchronizer.dispose();
 435             synchronizer = null;
 436         }
 437         if (diagram != null) {
 438             diagram.dispose();
 439             diagram = null;
 440         }
 441     }
 442
 443     /**
 444      * Hack for returning canvasContext for some special cases
 445      * this method brakes the interface, but this is not intended to be used in production context
 446      * @return
 447      */
 448     @Override
 449     public ICanvasContext getCanvasContext() {
 450         return ctx;
 451     }
 452
 453     @Override
 454     public AWTEventListener getEventListener() {
 455         if(ctx == null) return null;
 456         if(listener == null) {
 457             listener = new AWTRemoteEventAdapter(ctx, ctx.getEventQueue());
 458         }
 459         return listener;
 460     }
 461
 462     @Override
 463     public void updateDiagram(final ResourceArray structuralPath) {
 464         final IHintContext hints = new HintContext();
 465         if(view != null) {
 466             System.out.println("using layer '"+view+"'");
 467             hints.setHint(DiagramHints.KEY_FIXED_LAYERS, new String[] { view });
 468         }
 469
 470         try {
 471             // FIXME: I have no idea if this works or not..
 472             diagram = Simantics.getSession().syncRequest(new Read<IDiagram>() {
 473                 @Override
 474                 public IDiagram perform(ReadGraph graph) throws DatabaseException {
 475                     IDiagram d = synchronizer.loadDiagram(new NullProgressMonitor(), graph, null, structuralPath.resources[0], null, structuralPath.removeFromBeginning(0), hints);
 476                     return d;
 477                 }
 478             });
 479             ctx.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, diagram);
 480         } catch (DatabaseException e) {
 481             // TODO Auto-generated catch block
 482             e.printStackTrace();
 483         }
 484     }
 485
 486     public void setExperiment(ReadGraph g, String identifier) {
 487         if(diagram == null) return;
 488         diagram.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, identifier);
 489         initialHints.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, identifier);
 490
 491 //              try {
 492 //                      DiagramExperiment.setActiveExperiment(g, diagram, (String)identifier);
 493 //              } catch (DatabaseException e) {
 494 //                      // TODO Auto-generated catch block
 495 //                      e.printStackTrace();
 496 //              }
 497
 498     }
 499
 500     /**
 501      * Supported keys:
 502      *     DiagramModelHints.KEY_SESSION_ID
 503      *     DiagramHints.KEY_NAVIGATION_ENABLED
 504      */
 505     @Override
 506     public void setHint(Object key, Object value) {
 507         if(DiagramModelHints.KEY_SESSION_ID.equals(key)) {
 508             if(diagram != null)
 509                 diagram.setHint(DiagramModelHints.KEY_SESSION_ID, value);
 510             initialHints.setHint(DiagramModelHints.KEY_SESSION_ID, value);
 511         } else if(DiagramModelHints.KEY_ACTIVE_EXPERIMENT.equals(key)) {
 512             if(diagram != null)
 513                 diagram.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, value);
 514             initialHints.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, value);
 515         } else if(DiagramHints.KEY_NAVIGATION_ENABLED.equals(key)) {
 516             navigation = (Boolean)value;
 517         }
 518     }
 519 }