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.participant.ConnectionCrossingsParticipant;
  40 import org.simantics.diagram.query.DiagramRequests;
  41 import org.simantics.diagram.runtime.RuntimeDiagramManager;
  42 import org.simantics.diagram.stubs.DiagramResource;
  43 import org.simantics.diagram.synchronization.CopyAdvisor;
  44 import org.simantics.diagram.synchronization.SynchronizationHints;
  45 import org.simantics.diagram.ui.DiagramModelHints;
  46 import org.simantics.g2d.canvas.Hints;
  47 import org.simantics.g2d.canvas.ICanvasContext;
  48 import org.simantics.g2d.canvas.impl.CanvasContext;
  49 import org.simantics.g2d.diagram.DiagramHints;
  50 import org.simantics.g2d.diagram.IDiagram;
  51 import org.simantics.g2d.diagram.participant.DiagramParticipant;
  52 import org.simantics.g2d.diagram.participant.ElementInteractor;
  53 import org.simantics.g2d.diagram.participant.ElementPainter;
  54 import org.simantics.g2d.diagram.participant.Selection;
  55 import org.simantics.g2d.diagram.participant.ZOrderHandler;
  56 import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
  57 import org.simantics.g2d.element.ElementClassProviders;
  58 import org.simantics.g2d.element.ElementClasses;
  59 import org.simantics.g2d.element.IElementClassProvider;
  60 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  61 import org.simantics.g2d.multileveldiagram.TransitionFunction;
  62 import org.simantics.g2d.multileveldiagram.ZoomTransitionParticipant;
  63 import org.simantics.g2d.page.DiagramDesc;
  64 import org.simantics.g2d.participant.BackgroundPainter;
  65 import org.simantics.g2d.participant.CanvasBoundsParticipant;
  66 import org.simantics.g2d.participant.CanvasGrab;
  67 import org.simantics.g2d.participant.GridPainter;
  68 import org.simantics.g2d.participant.KeyToCommand;
  69 import org.simantics.g2d.participant.KeyUtil;
  70 import org.simantics.g2d.participant.MouseUtil;
  71 import org.simantics.g2d.participant.MultitouchPanZoomRotateInteractor;
  72 import org.simantics.g2d.participant.Notifications;
  73 import org.simantics.g2d.participant.PageBorderParticipant;
  74 import org.simantics.g2d.participant.PanZoomRotateHandler;
  75 import org.simantics.g2d.participant.PointerPainter;
  76 import org.simantics.g2d.participant.RulerPainter;
  77 import org.simantics.g2d.participant.SymbolUtil;
  78 import org.simantics.g2d.participant.TimeParticipant;
  79 import org.simantics.g2d.participant.TransformUtil;
  80 import org.simantics.g2d.participant.ZoomToAreaHandler;
  81 import org.simantics.g2d.scenegraph.ICanvasSceneGraphProvider;
  82 import org.simantics.modeling.ModelingResources;
  83 import org.simantics.modeling.mapping.ComponentCopyAdvisor;
  84 import org.simantics.modeling.mapping.ElementCopyAdvisor;
  85 import org.simantics.modeling.mapping.MappedElementCopyAdvisor;
  86 import org.simantics.modeling.mapping.ModelingSynchronizationHints;
  87 import org.simantics.modeling.ui.diagramEditor.PopulateElementDropParticipant;
  88 import org.simantics.modeling.ui.diagramEditor.PopulateElementMonitorDropParticipant;
  89 import org.simantics.modeling.ui.diagramEditor.handlers.HeadlessStructuralBrowsingHandler;
  90 import org.simantics.modeling.ui.diagramEditor.handlers.HeadlessStructuralBrowsingHandler.IDiagramUpdateSupport;
  91 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  92 import org.simantics.scenegraph.g2d.events.adapter.AWTRemoteEventAdapter;
  93 import org.simantics.scenegraph.g2d.events.command.CommandKeyBinding;
  94 import org.simantics.structural.stubs.StructuralResource2;
  95 import org.simantics.structural2.modelingRules.IModelingRules;
  96 import org.simantics.utils.datastructures.hints.HintContext;
  97 import org.simantics.utils.datastructures.hints.IHintContext;
  98 import org.simantics.utils.page.PageDesc;
  99 import org.simantics.utils.page.PageOrientation;
 100 import org.simantics.utils.threads.AWTThread;
 101 import org.simantics.utils.threads.IThreadWorkQueue;
 102 import org.simantics.utils.threads.ThreadUtils;
 103 import org.simantics.utils.ui.ErrorLogger;
 104
 105
 106 /**
 107  * ISceneGraphProvider implementation for diagrams.
 108  * TODO: decide if this should be stateless or stateful class
 109  *
 110  * @author J-P Laine
 111  *
 112  */
 113 public class DiagramSceneGraphProvider implements ICanvasSceneGraphProvider, IDiagramUpdateSupport {
 114
 115         protected boolean isSymbol = false;
 116     protected Resource resource;
 117     protected ResourceArray structuralPath = null;
 118     protected IDiagram diagram = null;
 119     protected CanvasContext ctx = null;
 120     protected boolean ownsContext = false;
 121     protected GraphToDiagramSynchronizer synchronizer = null;
 122     protected String view = null;
 123     protected Boolean navigation = null;
 124
 125     protected AWTRemoteEventAdapter listener = null;
 126
 127     final IHintContext initialHints = new HintContext();
 128
 129     public DiagramSceneGraphProvider(ReadGraph g, final Resource diagramOrComposite) {
 130         this.structuralPath = new ResourceArray();
 131         try {
 132
 133             StructuralResource2 sr = StructuralResource2.getInstance(g);
 134                 DiagramResource DIA = DiagramResource.getInstance(g);
 135
 136                 Resource diagram = diagramOrComposite;
 137                 if(!g.isInstanceOf(diagram, DIA.Composite)) {
 138
 139                 ModelingResources mr = ModelingResources.getInstance(g);
 140                         diagram = g.getPossibleObject(diagramOrComposite, mr.CompositeToDiagram);
 141                         if(diagram == null) {
 142                     // looks like we have a component without direct relation to composite.. try to solve this
 143                     // FIXME: use adapter to get composite directly from resource
 144                     final Resource type = g.getSingleType(diagramOrComposite, sr.Component);
 145                     if (type == null)
 146                         return;
 147
 148                     final Resource definedBy = g.getPossibleObject(type, sr.IsDefinedBy);
 149                     if (definedBy == null)
 150                         return;
 151
 152                     this.structuralPath = new ResourceArray(diagramOrComposite);
 153                     diagram =  g.getPossibleObject(definedBy, mr.CompositeToDiagram);
 154                         }
 155
 156                 } else {
 157
 158                         Resource possibleSymbol = g.getPossibleObject(diagram, sr.Defines);
 159                         if(possibleSymbol != null && g.isInstanceOf(possibleSymbol, DIA.ElementClass)) isSymbol = true;
 160
 161                 }
 162
 163                         this.resource = diagram;
 164
 165         } catch (ManyObjectsForFunctionalRelationException e) {
 166             // TODO Auto-generated catch block
 167             e.printStackTrace();
 168         } catch (ServiceException e) {
 169             // TODO Auto-generated catch block
 170             e.printStackTrace();
 171         } catch (NoSingleResultException e) {
 172             // TODO Auto-generated catch block
 173             e.printStackTrace();
 174         }
 175     }
 176
 177     public GraphToDiagramSynchronizer getGraphToDiagramSynchronizer() {
 178         return synchronizer;
 179     }
 180
 181     protected CopyPasteStrategy getCopyPasteStrategy() {
 182                 try {
 183                         CopyPasteStrategy cpStrategy = Simantics.getSession().syncRequest(new PossibleAdapter<CopyPasteStrategy>(resource, CopyPasteStrategy.class));
 184                         if(cpStrategy != null) return cpStrategy;
 185                 } catch (DatabaseException e) {
 186                 }
 187                 return new DefaultCopyPasteStrategy();
 188     }
 189
 190     protected CopyAdvisor getCopyAdvisor() {
 191                 try {
 192                         CopyAdvisor advisor = Simantics.getSession().syncRequest(new PossibleAdapter<CopyAdvisor>(resource, CopyAdvisor.class));
 193                         if(advisor != null) return advisor;
 194                 } catch (DatabaseException e) {
 195                 }
 196                 return new MappedElementCopyAdvisor(new ElementCopyAdvisor(), new ComponentCopyAdvisor());
 197     }
 198
 199     protected void initContext(CanvasContext ctx) {
 200         boolean unlock = false;
 201         if (!ctx.isLocked()) {
 202             ctx.setLocked(true);
 203             unlock = true;
 204         }
 205
 206         IHintContext h = ctx.getDefaultHintContext();
 207
 208         // Support & Util Participants
 209         ctx.add( new TransformUtil() );
 210         ctx.add( new MouseUtil() );
 211         ctx.add( new KeyUtil() );
 212         ctx.add( new CanvasGrab() );
 213         ctx.add( new SymbolUtil() );
 214         ctx.add( new TimeParticipant() );
 215         ctx.add( new CanvasBoundsParticipant() );
 216         ctx.add( new Notifications() );
 217
 218         // SGFocusParticipant does not work for remote viewer at the moment.
 219         //ctx.add( new SGFocusParticipant() );
 220
 221         h.setHint(PointerPainter.KEY_PAINT_POINTER, true);
 222
 223         ctx.add( new PanZoomRotateHandler(navigation == null || navigation == true) );
 224         ctx.add( new MultitouchPanZoomRotateInteractor() );
 225         ctx.add( new ZoomToAreaHandler() );
 226         ctx.add( new SimpleElementTransformHandler() );
 227
 228         // Key bindings
 229         if(navigation == null || navigation == true)
 230             ctx.add( new KeyToCommand( CommandKeyBinding.DEFAULT_BINDINGS ) );
 231
 232         // Grid & Ruler & Background
 233         h.setHint(RulerPainter.KEY_RULER_ENABLED, false);
 234         h.setHint(GridPainter.KEY_GRID_ENABLED, false);
 235
 236         ctx.add( new GridPainter() );
 237         ctx.add( new RulerPainter() );
 238         ctx.add( new BackgroundPainter() );
 239
 240         h.setHint(Hints.KEY_DISPLAY_PAGE, Boolean.FALSE);
 241         h.setHint(Hints.KEY_DISPLAY_MARGINS, Boolean.TRUE);
 242         ctx.add( new PageBorderParticipant() );
 243
 244         h.setHint(Hints.KEY_GRID_COLOR, new Color(0.95f, 0.95f, 0.95f));
 245         h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.WHITE);
 246         h.setHint(RulerPainter.KEY_RULER_BACKGROUND_COLOR, new Color(0.9f, 0.9f, 0.9f, 0.75f));
 247         h.setHint(RulerPainter.KEY_RULER_TEXT_COLOR, Color.BLACK);
 248
 249         ////// Diagram Participants //////
 250         ctx.add( new PointerInteractor(false, false, false, false, true, true, synchronizer.getElementClassProvider(), null) );
 251         ctx.add( new ElementInteractor() );
 252         ctx.add( new Selection() );
 253         ctx.add( new DiagramParticipant() );
 254         ctx.add( new ElementPainter(true) );
 255         ctx.add( new ConnectionCrossingsParticipant(resource));
 256
 257         //ctx.add( new ElementHeartbeater() );
 258         ctx.add( new ZOrderHandler() );
 259         ctx.add( new ZoomTransitionParticipant(TransitionFunction.SIGMOID) );
 260
 261         /////// D'n'D ///////
 262         ctx.add(new PopulateElementDropParticipant(synchronizer));
 263         ctx.add(new PopulateElementMonitorDropParticipant(synchronizer, 0.5, 0.5));
 264
 265         h.setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 266
 267         h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 1000.0);
 268         h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 10.0);
 269
 270         // Add visual browsing capabilities for structural models
 271         ISessionContext sessionContext = Simantics.getSessionContext();
 272         ctx.add(new HeadlessStructuralBrowsingHandler(this, sessionContext, structuralPath));
 273
 274         // Page settings
 275         PageDesc pageDesc = PageDesc.DEFAULT.withOrientation(PageOrientation.Landscape);
 276         // TODO: load page desc from graph
 277         h.setHint(Hints.KEY_PAGE_DESC, pageDesc);
 278
 279         ctx.add(new CopyPasteHandler(getCopyPasteStrategy()));
 280         ctx.add(new DeleteHandler(null));
 281
 282         if (resource != null)
 283             loadPageSettings(ctx, resource);
 284
 285         ctx.assertParticipantDependencies();
 286         if (unlock)
 287             ctx.setLocked(false);
 288     }
 289
 290     protected void loadPageSettings(ICanvasContext ctx, Resource diagramResource) {
 291         try {
 292             DiagramDesc diagramDesc = Simantics.getSession().syncRequest(DiagramRequests.getDiagramDesc(diagramResource));
 293             if (diagramDesc != null)
 294                 setDiagramDesc(ctx, diagramDesc);
 295
 296             // Create a listener to react to page setting changes.
 297             Simantics.getSession().asyncRequest(DiagramRequests.getDiagramDesc(diagramResource), new Listener<DiagramDesc>() {
 298                 @Override
 299                 public void execute(DiagramDesc result) {
 300                     if (result != null && ctx != null) {
 301                         ThreadUtils.asyncExec(ctx.getThreadAccess(), () -> {
 302                             if (ctx != null) {
 303                                 setDiagramDesc(ctx, result);
 304                             }
 305                         });
 306                     }
 307                 }
 308
 309                 @Override
 310                 public void exception(Throwable t) {
 311                     ErrorLogger.defaultLogError(t);
 312                 }
 313
 314                 @Override
 315                 public boolean isDisposed() {
 316                     return DiagramSceneGraphProvider.this.ctx == null;
 317                 }
 318             });
 319         } catch (DatabaseException e) {
 320             ErrorLogger.defaultLogError(e);
 321         }
 322     }
 323
 324     protected void setDiagramDesc(ICanvasContext ctx, DiagramDesc diagramDesc) {
 325         IHintContext hints = ctx.getDefaultHintContext();
 326         hints.setHint(Hints.KEY_PAGE_DESC, diagramDesc.getPageDesc());
 327         hints.setHint(Hints.KEY_DISPLAY_PAGE, diagramDesc.isPageBordersVisible());
 328         hints.setHint(Hints.KEY_DISPLAY_MARGINS, diagramDesc.isMarginsVisible());
 329     }
 330
 331     @Override
 332     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg) {
 333         return initializeSceneGraph(sg, null);
 334     }
 335
 336     @Override
 337     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String view) {
 338         return initializeSceneGraph(sg, "", "", view);
 339     }
 340
 341     @Override
 342     public G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String modelURI, String RVI) {
 343         return initializeSceneGraph(sg, modelURI, RVI, "");
 344     }
 345
 346     @Override
 347     public G2DSceneGraph initializeSceneGraph(ICanvasContext context, String modelURI, String RVI) {
 348         G2DSceneGraph sg = context.getSceneGraph();
 349         return initializeSceneGraph(context, sg, modelURI, RVI, "");
 350     }
 351
 352     /**
 353      * @param sg
 354      * @param view
 355      * @param initialHints
 356      * @return
 357      */
 358     private G2DSceneGraph initializeSceneGraph(G2DSceneGraph sg, String modelURI, String RVI, String view) {
 359         IThreadWorkQueue thread = AWTThread.getThreadAccess();
 360         ctx = new CanvasContext(thread, sg); // By giving the scene graph instance as parameter, we can use external serializer
 361         return initializeSceneGraph(ctx, sg, modelURI, RVI, view);
 362     }
 363
 364     /**
 365      * @param sg
 366      * @param view
 367      * @param initialHints
 368      * @return
 369      */
 370     private G2DSceneGraph initializeSceneGraph(ICanvasContext context, G2DSceneGraph sg, String modelURI, String RVI, String view) {
 371         this.ctx = (CanvasContext) context;
 372         this.view = view;
 373         if(view != null) {
 374             //System.out.println("using layer '"+view+"'");
 375             initialHints.setHint(DiagramHints.KEY_FIXED_LAYERS, new String[] { view });
 376         }
 377
 378         try {
 379                 fillInitialDiagramHints(initialHints);
 380
 381             final RuntimeDiagramManager runtimeDiagramManager = RuntimeDiagramManager.create(Simantics.getSession(), resource, modelURI, RVI);
 382
 383             synchronizer = Simantics.getSession().syncRequest(new Read<GraphToDiagramSynchronizer>() {
 384                 @Override
 385                 public GraphToDiagramSynchronizer perform(ReadGraph graph) throws DatabaseException {
 386                     DiagramResource dr = DiagramResource.getInstance(graph);
 387                     Boolean val = graph.getPossibleRelatedValue(resource, dr.NavigationEnabled, Bindings.BOOLEAN);
 388                     if(val != null && navigation == null) { // Set only if navigation has not been set manually
 389                         navigation = val;
 390                     }
 391                     GraphToDiagramSynchronizer sync = new GraphToDiagramSynchronizer(graph, ctx,createElementClassProvider(graph));
 392
 393                     sync.set(ModelingSynchronizationHints.MODELING_RESOURCE, ModelingResources.getInstance(graph));
 394                     diagram = sync.loadDiagram(new NullProgressMonitor(), graph, null, resource, runtimeDiagramManager.getRuntimeDiagram(), structuralPath, initialHints); // FIXME
 395                     return sync;
 396                 }
 397             });
 398
 399         } catch (DatabaseException e) {
 400             // TODO Auto-generated catch block
 401             e.printStackTrace();
 402         }
 403         ctx.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, diagram);
 404
 405         initContext(ctx);
 406
 407         return ctx.getSceneGraph();
 408     }
 409
 410     protected void fillInitialDiagramHints(IHintContext initialHints) throws DatabaseException {
 411           IModelingRules modelingRules = Simantics.getSession().syncRequest(DiagramRequests.getModelingRules(resource, null));
 412           if (modelingRules != null) {
 413               initialHints.setHint(DiagramModelHints.KEY_MODELING_RULES, modelingRules);
 414           }
 415
 416           initialHints.setHint(SynchronizationHints.COPY_ADVISOR, getCopyAdvisor());
 417     }
 418
 419     protected IElementClassProvider createElementClassProvider(ReadGraph graph) throws DatabaseException {
 420         DiagramResource dr = DiagramResource.getInstance(graph);
 421         return ElementClassProviders.mappedProvider(
 422                   ElementClasses.CONNECTION, DefaultConnectionClassFactory.CLASS.newClassWith(new StaticObjectAdapter(dr.Connection)),
 423                   ElementClasses.FLAG, FlagClassFactory.createFlagClass(dr.Flag, dr.Flag_Terminal)
 424         );
 425
 426     }
 427
 428     @Override
 429     public void dispose() {
 430         if(ctx != null) {
 431             if (ownsContext)
 432                 ctx.dispose();
 433             ctx = null;
 434         }
 435         if (synchronizer != null) {
 436             synchronizer.dispose();
 437             synchronizer = null;
 438         }
 439         if (diagram != null) {
 440             diagram.dispose();
 441             diagram = null;
 442         }
 443     }
 444
 445     /**
 446      * Hack for returning canvasContext for some special cases
 447      * this method brakes the interface, but this is not intended to be used in production context
 448      * @return
 449      */
 450     @Override
 451     public ICanvasContext getCanvasContext() {
 452         return ctx;
 453     }
 454
 455     @Override
 456     public AWTEventListener getEventListener() {
 457         if(ctx == null) return null;
 458         if(listener == null) {
 459             listener = new AWTRemoteEventAdapter(ctx, ctx.getEventQueue());
 460         }
 461         return listener;
 462     }
 463
 464     @Override
 465     public void updateDiagram(final ResourceArray structuralPath) {
 466         final IHintContext hints = new HintContext();
 467         if(view != null) {
 468             System.out.println("using layer '"+view+"'");
 469             hints.setHint(DiagramHints.KEY_FIXED_LAYERS, new String[] { view });
 470         }
 471
 472         try {
 473             // FIXME: I have no idea if this works or not..
 474             diagram = Simantics.getSession().syncRequest(new Read<IDiagram>() {
 475                 @Override
 476                 public IDiagram perform(ReadGraph graph) throws DatabaseException {
 477                     IDiagram d = synchronizer.loadDiagram(new NullProgressMonitor(), graph, null, structuralPath.resources[0], null, structuralPath.removeFromBeginning(0), hints);
 478                     return d;
 479                 }
 480             });
 481             ctx.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, diagram);
 482         } catch (DatabaseException e) {
 483             // TODO Auto-generated catch block
 484             e.printStackTrace();
 485         }
 486     }
 487
 488     public void setExperiment(ReadGraph g, String identifier) {
 489         if(diagram == null) return;
 490         diagram.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, identifier);
 491         initialHints.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, identifier);
 492
 493 //              try {
 494 //                      DiagramExperiment.setActiveExperiment(g, diagram, (String)identifier);
 495 //              } catch (DatabaseException e) {
 496 //                      // TODO Auto-generated catch block
 497 //                      e.printStackTrace();
 498 //              }
 499
 500     }
 501
 502     /**
 503      * Supported keys:
 504      *     DiagramModelHints.KEY_SESSION_ID
 505      *     DiagramHints.KEY_NAVIGATION_ENABLED
 506      */
 507     @Override
 508     public void setHint(Object key, Object value) {
 509         if(DiagramModelHints.KEY_SESSION_ID.equals(key)) {
 510             if(diagram != null)
 511                 diagram.setHint(DiagramModelHints.KEY_SESSION_ID, value);
 512             initialHints.setHint(DiagramModelHints.KEY_SESSION_ID, value);
 513         } else if(DiagramModelHints.KEY_ACTIVE_EXPERIMENT.equals(key)) {
 514             if(diagram != null)
 515                 diagram.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, value);
 516             initialHints.setHint(DiagramModelHints.KEY_ACTIVE_EXPERIMENT, value);
 517         } else if(DiagramHints.KEY_NAVIGATION_ENABLED.equals(key)) {
 518             navigation = (Boolean)value;
 519         }
 520     }
 521 }