bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/e4/DiagramViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2013 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  *     Semantum Oy - issue #4384
  12  *******************************************************************************/
  13 package org.simantics.modeling.ui.diagramEditor.e4;
  14
  15 import java.awt.Color;
  16 import java.awt.dnd.DnDConstants;
  17 import java.util.Collections;
  18 import java.util.Set;
  19 import java.util.concurrent.TimeUnit;
  20 import java.util.function.Supplier;
  21
  22 import org.eclipse.core.runtime.Assert;
  23 import org.eclipse.core.runtime.IAdaptable;
  24 import org.eclipse.core.runtime.IProgressMonitor;
  25 import org.eclipse.core.runtime.SubMonitor;
  26 import org.eclipse.core.runtime.jobs.Job;
  27 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  28 import org.eclipse.e4.ui.services.EContextService;
  29 import org.eclipse.jface.action.IStatusLineManager;
  30 import org.eclipse.jface.resource.JFaceResources;
  31 import org.eclipse.jface.resource.LocalResourceManager;
  32 import org.eclipse.swt.widgets.Composite;
  33 import org.eclipse.swt.widgets.Display;
  34 import org.eclipse.swt.widgets.Shell;
  35 import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
  36 import org.simantics.Simantics;
  37 import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;
  38 import org.simantics.db.ReadGraph;
  39 import org.simantics.db.Resource;
  40 import org.simantics.db.Session;
  41 import org.simantics.db.WriteGraph;
  42 import org.simantics.db.common.primitiverequest.PossibleAdapter;
  43 import org.simantics.db.common.procedure.adapter.ListenerDelegate;
  44 import org.simantics.db.common.procedure.adapter.ListenerSupport;
  45 import org.simantics.db.common.request.ParametrizedRead;
  46 import org.simantics.db.common.request.WriteRequest;
  47 import org.simantics.db.common.utils.CommonDBUtils;
  48 import org.simantics.db.common.utils.TagUtil;
  49 import org.simantics.db.exception.DatabaseException;
  50 import org.simantics.db.layer0.request.combinations.Combinators;
  51 import org.simantics.db.management.ISessionContext;
  52 import org.simantics.db.management.ISessionContextProvider;
  53 import org.simantics.db.request.Read;
  54 import org.simantics.diagram.DiagramTypeUtils;
  55 import org.simantics.diagram.adapter.FlagClassFactory;
  56 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;
  57 import org.simantics.diagram.adapter.IDiagramLoader;
  58 import org.simantics.diagram.connection.ModelledConnectionAdvisor;
  59 import org.simantics.diagram.handler.ConnectionCommandHandler;
  60 import org.simantics.diagram.handler.CopyPasteStrategy;
  61 import org.simantics.diagram.handler.DefaultCopyPasteStrategy;
  62 import org.simantics.diagram.handler.DeleteHandler;
  63 import org.simantics.diagram.handler.ExpandSelectionHandler;
  64 import org.simantics.diagram.handler.SimpleElementTransformHandler;
  65 import org.simantics.diagram.handler.e4.CopyPasteHandler;
  66 import org.simantics.diagram.layer.ILayersViewPage;
  67 import org.simantics.diagram.participant.PointerInteractor2;
  68 import org.simantics.diagram.participant.SGFocusParticipant;
  69 import org.simantics.diagram.participant.e4.ContextUtil;
  70 import org.simantics.diagram.query.DiagramRequests;
  71 import org.simantics.diagram.runtime.RuntimeDiagramManager;
  72 import org.simantics.diagram.stubs.DiagramResource;
  73 import org.simantics.diagram.symbolcontribution.SymbolProviderFactory;
  74 import org.simantics.diagram.synchronization.CopyAdvisor;
  75 import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;
  76 import org.simantics.diagram.synchronization.SynchronizationHints;
  77 import org.simantics.diagram.synchronization.graph.DiagramGraphUtil;
  78 import org.simantics.diagram.ui.DiagramModelHints;
  79 import org.simantics.diagram.ui.SWTPopupMenuParticipant;
  80 import org.simantics.diagram.ui.WorkbenchSelectionProvider;
  81 import org.simantics.g2d.canvas.Hints;
  82 import org.simantics.g2d.canvas.ICanvasContext;
  83 import org.simantics.g2d.canvas.ICanvasParticipant;
  84 import org.simantics.g2d.canvas.impl.CanvasContext;
  85 import org.simantics.g2d.chassis.AWTChassis;
  86 import org.simantics.g2d.chassis.ICanvasChassis;
  87 import org.simantics.g2d.chassis.IChassisListener;
  88 import org.simantics.g2d.chassis.SWTChassis;
  89 import org.simantics.g2d.connection.IConnectionAdvisor;
  90 import org.simantics.g2d.diagram.DiagramClass;
  91 import org.simantics.g2d.diagram.DiagramHints;
  92 import org.simantics.g2d.diagram.IDiagram;
  93 import org.simantics.g2d.diagram.handler.PickRequest.PickFilter;
  94 import org.simantics.g2d.diagram.impl.Diagram;
  95 import org.simantics.g2d.diagram.participant.DelayedBatchElementPainter;
  96 import org.simantics.g2d.diagram.participant.DiagramParticipant;
  97 import org.simantics.g2d.diagram.participant.ElementInteractor;
  98 import org.simantics.g2d.diagram.participant.ElementPainter;
  99 import org.simantics.g2d.diagram.participant.Selection;
 100 import org.simantics.g2d.diagram.participant.TerminalPainter;
 101 import org.simantics.g2d.diagram.participant.ZOrderHandler;
 102 import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
 103 import org.simantics.g2d.element.ElementClassProviders;
 104 import org.simantics.g2d.element.ElementClasses;
 105 import org.simantics.g2d.element.IElement;
 106 import org.simantics.g2d.element.IElementClassProvider;
 107 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
 108 import org.simantics.g2d.elementclass.connection.ConnectionClass;
 109 import org.simantics.g2d.page.DiagramDesc;
 110 import org.simantics.g2d.participant.BackgroundPainter;
 111 import org.simantics.g2d.participant.CanvasBoundsParticipant;
 112 import org.simantics.g2d.participant.CanvasGrab;
 113 import org.simantics.g2d.participant.GridPainter;
 114 import org.simantics.g2d.participant.KeyUtil;
 115 import org.simantics.g2d.participant.MouseUtil;
 116 import org.simantics.g2d.participant.Notifications;
 117 import org.simantics.g2d.participant.PageBorderParticipant;
 118 import org.simantics.g2d.participant.PanZoomRotateHandler;
 119 import org.simantics.g2d.participant.PointerPainter;
 120 import org.simantics.g2d.participant.RenderingQualityInteractor;
 121 import org.simantics.g2d.participant.RulerPainter;
 122 import org.simantics.g2d.participant.SymbolUtil;
 123 import org.simantics.g2d.participant.TimeParticipant;
 124 import org.simantics.g2d.participant.TransformUtil;
 125 import org.simantics.g2d.participant.WorkbenchStatusLine;
 126 import org.simantics.g2d.participant.ZoomToAreaHandler;
 127 import org.simantics.g2d.tooltip.TerminalTooltipParticipant;
 128 import org.simantics.g2d.utils.CanvasUtils;
 129 import org.simantics.layer0.utils.triggers.IActivation;
 130 import org.simantics.layer0.utils.triggers.IActivationManager;
 131 import org.simantics.modeling.ModelingResources;
 132 import org.simantics.modeling.mapping.ComponentCopyAdvisor;
 133 import org.simantics.modeling.mapping.ElementCopyAdvisor;
 134 import org.simantics.modeling.mapping.MappedElementCopyAdvisor;
 135 import org.simantics.modeling.mapping.ModelingSynchronizationHints;
 136 import org.simantics.modeling.ui.diagramEditor.DiagramEditorStates;
 137 import org.simantics.modeling.ui.diagramEditor.DiagramLayersPage;
 138 import org.simantics.modeling.ui.diagramEditor.DiagramOutlinePage;
 139 import org.simantics.modeling.ui.diagramEditor.EditorState;
 140 import org.simantics.modeling.ui.diagramEditor.PopulateElementMonitorDropParticipant;
 141 import org.simantics.modeling.ui.diagramEditor.handlers.e4.LinkBrowsingHandler;
 142 import org.simantics.modeling.ui.diagramEditor.handlers.e4.StructuralBrowsingHandler;
 143 import org.simantics.modeling.ui.preferences.DiagramPreferenceUtil;
 144 import org.simantics.modeling.ui.preferences.DiagramPreferences;
 145 import org.simantics.project.ontology.ProjectResource;
 146 import org.simantics.scenegraph.INode;
 147 import org.simantics.scenegraph.g2d.snap.GridSnapAdvisor;
 148 import org.simantics.scenegraph.utils.NodeUtil;
 149 import org.simantics.structural.stubs.StructuralResource2;
 150 import org.simantics.structural2.modelingRules.IModelingRules;
 151 import org.simantics.ui.SimanticsUI;
 152 import org.simantics.ui.jobs.SessionGarbageCollectorJob;
 153 import org.simantics.ui.workbench.IPropertyPage;
 154 import org.simantics.ui.workbench.IResourceEditorInput;
 155 import org.simantics.ui.workbench.IResourceEditorInput2;
 156 import org.simantics.ui.workbench.TitleRequest;
 157 import org.simantics.ui.workbench.TitleUpdater;
 158 import org.simantics.ui.workbench.ToolTipRequest;
 159 import org.simantics.ui.workbench.editor.input.InputValidationCombinators;
 160 import org.simantics.utils.DataContainer;
 161 import org.simantics.utils.datastructures.Callback;
 162 import org.simantics.utils.datastructures.hints.HintContext;
 163 import org.simantics.utils.datastructures.hints.HintListenerAdapter;
 164 import org.simantics.utils.datastructures.hints.IHintContext;
 165 import org.simantics.utils.datastructures.hints.IHintContext.Key;
 166 import org.simantics.utils.datastructures.hints.IHintListener;
 167 import org.simantics.utils.datastructures.hints.IHintObservable;
 168 import org.simantics.utils.threads.AWTThread;
 169 import org.simantics.utils.threads.IThreadWorkQueue;
 170 import org.simantics.utils.threads.SWTThread;
 171 import org.simantics.utils.threads.ThreadUtils;
 172 import org.simantics.utils.ui.ErrorLogger;
 173 import org.simantics.utils.ui.ExceptionUtils;
 174 import org.simantics.utils.ui.workbench.WorkbenchUtils;
 175
 176 import com.kitfox.svg.SVGCache;
 177
 178 /**
 179  * @author Toni Kalajainen
 180  * @author Tuukka Lehtonen
 181  */
 182 public class DiagramViewer
 183   //extends EditorPart implements IResourceEditorPart2,
 184     implements ListenerSupport, IAdaptable {
 185
 186     public interface DiagramViewerHost {
 187         void doSetPartName(String name);
 188         void doSetTitleToolTip(String name);
 189     }
 190
 191     public static final String                     DIAGRAMMING_CONTEXT      = "org.simantics.modeling.ui.diagramming";
 192     private static final String                     PREFERENCE_VIRTUAL_GRAPH = "preferences";
 193
 194     private static final boolean                    PROFILE                  = false;
 195
 196     ParametrizedRead<IResourceEditorInput, Boolean> INPUT_VALIDATOR =
 197         Combinators.compose(
 198                 InputValidationCombinators.or(
 199                         // Normal configuration diagrams of a model
 200                         Combinators.compose(
 201                                 InputValidationCombinators.hasURI(),
 202                                 InputValidationCombinators.partialFunction(ModelingResources.URIs.DiagramToComposite)
 203                         ),
 204                         // Configuration diagrams of a component type
 205                         Combinators.compose(
 206                                 InputValidationCombinators.hasURI(),
 207                                 Combinators.compose(
 208                                         InputValidationCombinators.partialFunction(StructuralResource2.URIs.Defines),
 209                                         InputValidationCombinators.partialFunction(ModelingResources.URIs.DiagramToComposite)
 210                                 )
 211                         )
 212                 ),
 213                 InputValidationCombinators.extractInputResource()
 214         );
 215
 216     protected EditorState                editorState;
 217
 218     protected boolean                    disposed           = false;
 219     protected IThreadWorkQueue           swt;
 220     protected IStatusLineManager         statusLineManager;
 221     protected Display                    display;
 222     protected LocalResourceManager       resourceManager;
 223     protected SWTChassis                 c;
 224     protected IDiagram                   sourceDiagram;
 225     protected DataContainer<IDiagram>    sourceDiagramContainer = new DataContainer<IDiagram>();
 226     protected CanvasContext              canvasContext;
 227     protected ISessionContextProvider    sessionContextProvider;
 228     protected ISessionContext            sessionContext;
 229     protected Resource                   diagramResource;
 230     protected GraphToDiagramSynchronizer synchronizer;
 231     protected IActivation                activation;
 232     protected ContextUtil                contextUtil;
 233     protected SWTPopupMenuParticipant    popupMenuParticipant;
 234
 235     protected DiagramPreferences         diagramPreferences;
 236     protected DiagramDesc                diagramDesc;
 237     protected GridSnapAdvisor            snapAdvisor;
 238
 239     private RuntimeDiagramManager        runtimeDiagramManager;
 240
 241     protected WorkbenchSelectionProvider selectionProvider;
 242
 243     public Resource getRuntime() {
 244         RuntimeDiagramManager rtdm = runtimeDiagramManager;
 245         return (rtdm == null) ? null : rtdm.getRuntimeDiagram();
 246     }
 247
 248     public ParametrizedRead<IResourceEditorInput, Boolean> getInputValidator() {
 249         return INPUT_VALIDATOR;
 250     }
 251
 252     protected void addDropParticipants(ICanvasContext ctx) {
 253         ctx.getDefaultHintContext().setHint(Hints.KEY_ALLOWED_DRAG_ACTIONS, DnDConstants.ACTION_COPY);
 254
 255         ctx.add(new PopulateElementDropParticipant(synchronizer, getPart()));
 256         ctx.add(new PopulateElementMonitorDropParticipant(synchronizer, 0.5, 0.5));
 257     }
 258
 259     protected CopyPasteStrategy getCopyPasteStrategy() {
 260                 try {
 261                         CopyPasteStrategy cpStrategy = Simantics.getSession().syncRequest(new PossibleAdapter<CopyPasteStrategy>(getResourceEditorInput().getResource(), CopyPasteStrategy.class));
 262                         if(cpStrategy != null) return cpStrategy;
 263                 } catch (DatabaseException e) {
 264                 }
 265                 return new DefaultCopyPasteStrategy();
 266     }
 267
 268     protected CopyAdvisor getCopyAdvisor() {
 269                 try {
 270                         CopyAdvisor advisor = Simantics.getSession().syncRequest(new PossibleAdapter<CopyAdvisor>(getResourceEditorInput().getResource(), CopyAdvisor.class));
 271                         if(advisor != null) return advisor;
 272                 } catch (DatabaseException e) {
 273                 }
 274                 return new MappedElementCopyAdvisor(new ElementCopyAdvisor(), new ComponentCopyAdvisor());
 275     }
 276
 277     /**
 278      * @param ctx
 279      * TODO: change argument from CanvasContext to ICanvasContext
 280      */
 281     protected void addKeyBindingParticipants(CanvasContext ctx) {
 282         //ctx.add( new KeyToCommand( CommandKeyBinding.DEFAULT_BINDINGS ) );
 283         ctx.add(new DeleteHandler(statusLineManager));
 284         ctx.add(new CopyPasteHandler(getCopyPasteStrategy(), statusLineManager).setWorkbenchSite(getPart()));
 285         ctx.add(new ConnectionCommandHandler());
 286     }
 287
 288     protected void addPopupmenu(ICanvasContext ctx) {
 289         ctx.add(popupMenuParticipant);
 290     }
 291
 292     protected void addWorkbenchSelectionProvider(ICanvasContext ctx) {
 293         ctx.add(selectionProvider);
 294     }
 295
 296     protected void addViewManipulationParticipants(CanvasContext ctx) {
 297         ctx.add(new PanZoomRotateHandler());
 298         //ctx.add(new MousePanZoomInteractor());
 299         //ctx.add(new MultitouchPanZoomRotateInteractor());
 300         // ctx.add( new OrientationRestorer() );
 301         ctx.add(new ZoomToAreaHandler());
 302     }
 303
 304     protected void addDiagramParticipants(ICanvasContext ctx) {
 305         ctx.add(new ZOrderHandler());
 306         ctx.add(getPointerInteractor());
 307         ctx.add(new ElementInteractor());
 308         ctx.add(new Selection());
 309         ctx.add(new DiagramParticipant());
 310         ctx.add(new ElementPainter());
 311         //ctx.add(new ElementHeartbeater());
 312         //ctx.add(new ZoomTransitionParticipant(TransitionFunction.SIGMOID));
 313         //ctx.add(new TooltipParticipant());
 314         ctx.add(new TerminalTooltipParticipant());
 315     }
 316
 317     protected void addPainterParticipants(ICanvasContext ctx) {
 318         ctx.add(new RenderingQualityInteractor());
 319         ctx.add(new TerminalPainter(true, true, false, true));
 320         ctx.add(new DelayedBatchElementPainter(PickFilter.FILTER_MONITORS, 500, TimeUnit.MILLISECONDS));
 321     }
 322
 323     protected void addStructureParticipants(ICanvasContext ctx) {
 324         addWorkbenchSelectionProvider(ctx);
 325         // Add visual browsing capabilities for structural models
 326         ctx.add(new StructuralBrowsingHandler(sessionContext, getPart(), getResourceEditorInput()));
 327         ctx.add(new LinkBrowsingHandler(this, sessionContext));
 328     }
 329
 330     /**
 331      * Override to add any diagram/canvas participants to the canvas context
 332      * initialized for the editor.
 333      *
 334      * @param ctx
 335      */
 336     protected void addOtherParticipants(CanvasContext ctx) {
 337     }
 338
 339     public static Set<String> defaultPropertyBrowseContexts = Collections.singleton(ProjectResource.URIs.ProjectBrowseContext);
 340
 341     protected Set<String> getPropertyPageContexts() {
 342         try {
 343             return BrowseContext.getBrowseContextClosure(SimanticsUI.getSession(), defaultPropertyBrowseContexts);
 344         } catch (DatabaseException e) {
 345             ExceptionUtils.logAndShowError("Failed to load modeled browse contexts for property page, see exception for details.", e);
 346             return defaultPropertyBrowseContexts;
 347         }
 348     }
 349
 350     protected IPropertyPage createPropertyPage(MPart part, Set<String> contexts) {
 351 //        #TODO Finish this when we are going to use full E4 workbench
 352 //        return new StandardPropertyPage(part, contexts);
 353         return null;
 354     }
 355
 356     protected String getPopupId() {
 357         return "#ModelingDiagramPopup";
 358     }
 359
 360     protected void getPreferences() {
 361         this.diagramPreferences = DiagramPreferenceUtil.getPreferences();
 362     }
 363
 364     protected void initSession() {
 365         sessionContextProvider = SimanticsUI.getSessionContextProvider();
 366         sessionContext = sessionContextProvider.getSessionContext();
 367     }
 368
 369     protected void readNames() {
 370         String name = getResourceEditorInput().getName();
 371         host.doSetPartName(name);
 372         host.doSetTitleToolTip(name);
 373     }
 374
 375     class ChassisListener implements IChassisListener {
 376         @Override
 377         public void chassisClosed(ICanvasChassis sender) {
 378             // Prevent deadlock while disposing which using syncExec would result in.
 379             final ICanvasContext ctx = canvasContext;
 380             ThreadUtils.asyncExec(ctx.getThreadAccess(), new Runnable() {
 381                 @Override
 382                 public void run() {
 383                     if (ctx != null) {
 384                         saveEditorState(ctx);
 385                         ctx.getHintStack().removeKeyHintListener(GridPainter.KEY_GRID_ENABLED, canvasHintListener);
 386                         ctx.getHintStack().removeKeyHintListener(RulerPainter.KEY_RULER_ENABLED, canvasHintListener);
 387                         final AWTChassis awtChassis = c.getAWTComponent();
 388                         if (awtChassis != null)
 389                             awtChassis.setCanvasContext(null);
 390                         ctx.dispose();
 391                     }
 392
 393                     sourceDiagramContainer.set(null);
 394                     sourceDiagramContainer = null;
 395
 396                     if (sourceDiagram != null)
 397                         sourceDiagram.dispose();
 398
 399                     if(synchronizer != null) {
 400                         synchronizer.dispose();
 401                         // Let GC work.
 402                         synchronizer = null;
 403                     }
 404
 405                     if (runtimeDiagramManager != null) {
 406                         runtimeDiagramManager.dispose();
 407                         runtimeDiagramManager = null;
 408                     }
 409                 }
 410             });
 411             c.removeChassisListener(ChassisListener.this);
 412         }
 413     }
 414
 415     protected void createChassis(Composite parent) {
 416         resourceManager = new LocalResourceManager(JFaceResources.getResources(), parent);
 417         c = new SWTChassis(parent, 0);
 418
 419         Object task = BEGIN("DV.precreateParticipants");
 420         createCustomParticipants();
 421         END(task);
 422
 423         c.populate(component -> {
 424             if (!disposed) {
 425                 c.addChassisListener(new ChassisListener());
 426                 initializeCanvas();
 427             }
 428         });
 429     }
 430
 431     protected void beforeSetCanvasContext(ICanvasContext canvasContext2) {
 432     }
 433
 434     /**
 435      * Invoke this only from the AWT thread.
 436      * @param context
 437      */
 438     protected void setCanvasContext(ICanvasContext context) {
 439         // Cannot directly invoke SWTChassis.setCanvasContext only because it
 440         // needs to be invoked in the SWT thread and AWTChassis.setCanvasContext in the
 441         // AWT thread, but directly invoking SWTChassis.setCanvasContext would call both
 442         // in the SWT thread which would cause synchronous scheduling of AWT
 443         // runnables which is always a potential source of deadlocks.
 444         c.getAWTComponent().setCanvasContext(canvasContext);
 445         swt.asyncExec(new Runnable() {
 446             @Override
 447             public void run() {
 448                 if (!c.isDisposed())
 449                     // For AWT, this is a no-operation.
 450                     c.setCanvasContext(canvasContext);
 451             }
 452         });
 453     }
 454
 455     public void createPartControl(Composite parent) {
 456         //ProfileObserver.begin = System.nanoTime();
 457         display = parent.getDisplay();
 458         swt = SWTThread.getThreadAccess(display);
 459         statusLineManager = WorkbenchUtils.getStatusLine(WorkbenchUtils.getActiveWorkbenchPart());
 460
 461         Object task = BEGIN("DV.initSession");
 462         initSession();
 463         END(task);
 464
 465         diagramResource = getResourceEditorInput().getResource();
 466         readNames();
 467         getPreferences();
 468
 469         // DiagramViewerSelectionProvider MUST be created and attached to the
 470         // workbench site:
 471         //   1. in SWT thread!
 472         //   2. here before returning from createPartControl
 473         selectionProvider = createSelectionProvider();
 474
 475         try {
 476             this.runtimeDiagramManager = RuntimeDiagramManager.track(sessionContext.getSession(), diagramResource, getResourceEditorInput(), this);
 477
 478             // Create the canvas context here before finishing createPartControl
 479             // to give DiagramViewerActionContributor a chance to work.
 480             // The context can be created in SWT thread without scheduling
 481             // to the context thread and having potential deadlocks.
 482             IThreadWorkQueue thread = AWTThread.getThreadAccess();
 483             this.canvasContext = new CanvasContext(thread);
 484             this.canvasContext.setLocked(true);
 485
 486             task = BEGIN("DV.createChassis");
 487             createChassis(parent);
 488             END(task);
 489         } catch (DatabaseException e) {
 490             ErrorLogger.defaultLogError(e);
 491         }
 492     }
 493
 494     /**
 495      * @return
 496      */
 497     protected WorkbenchSelectionProvider createSelectionProvider() {
 498 //        #TODO Finish this when we are going to use full E4 workbench
 499 //        return new DiagramViewerSelectionProvider(swt, getPart(), sourceDiagramContainer);
 500         return null;
 501     }
 502
 503         /**
 504      * A method invoked before chassis construction for creating such
 505      * {@link ICanvasParticipant}s that need to be constructed in the SWT
 506      * thread.
 507      *
 508      * Use it for creating any such canvas participants during the viewer
 509      * construction and add them to the {@link ICanvasContext} later on from
 510      * the AWT thread.
 511      */
 512     protected void createCustomParticipants() {
 513 //        #TODO Finish this when we are going to use full E4 workbench
 514 //        popupMenuParticipant = new SWTPopupMenuParticipant(getPart(), c, display, getPopupId());
 515     }
 516
 517     /**
 518      * Invoke this only from the AWT thread.
 519      */
 520     protected void initializeCanvas() {
 521         Object canvasInit = BEGIN("DV.canvasInitialization");
 522
 523         Object task = BEGIN("DV.createViewerCanvas");
 524         initializeCanvasContext(canvasContext);
 525         END(task);
 526
 527         beforeSetCanvasContext(canvasContext);
 528         //FullscreenUtils.addFullScreenHandler(canvasContext, s, canvasProvider);
 529
 530         // Without this all diagram participants will crash like there's no tomorrow.
 531         // Just trying to keep the behavior a bit more sane in case of
 532         // errors instead of flooding the console with exceptions.
 533         canvasContext.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, Diagram.spawnNew(DiagramClass.DEFAULT));
 534
 535         // Changes in ruler/grid activity shall be written as
 536         // workspace-persistent diagram-specific preferences.
 537         canvasContext.getHintStack().addKeyHintListener(GridPainter.KEY_GRID_ENABLED, canvasHintListener);
 538         canvasContext.getHintStack().addKeyHintListener(RulerPainter.KEY_RULER_ENABLED, canvasHintListener);
 539
 540         task = BEGIN("DV.setCanvasContext");
 541         setCanvasContext(canvasContext);
 542         END(task);
 543
 544         // Finish loading in a worker thread because it may be a time consuming
 545         // process to load a large diagram and we don't want unnecessary AWT
 546         // thread contention.
 547         Job loadJob = new DiagramViewerLoadJob(this);
 548         loadJob.schedule();
 549
 550         END(canvasInit);
 551     }
 552
 553     protected void activateUiContexts(ContextUtil util) {
 554         util.activate(DIAGRAMMING_CONTEXT);
 555     }
 556
 557     /**
 558      * @param monitor the progress monitor to use for reporting progress to the
 559      *        user. It is the caller's responsibility to call done() on the
 560      *        given monitor. Accepts <code>null</code>, indicating that no
 561      *        progress should be reported and that the operation cannot be
 562      *        cancelled.
 563      */
 564     protected void performActivation(IProgressMonitor monitor) {
 565         SubMonitor progress = SubMonitor.convert(monitor, "Activate Mapping", 100);
 566         IActivationManager activationManager = sessionContext.getSession().peekService(IActivationManager.class);
 567         if (activationManager != null) {
 568             activation = activationManager.activate(diagramResource);
 569         }
 570         progress.worked(100);
 571     }
 572
 573     protected void onCreated() {
 574     }
 575
 576     /**
 577      * @param diagram
 578      */
 579     protected void scheduleZoomToFit(IDiagram diagram) {
 580         if (diagram == null)
 581             throw new IllegalStateException("diagram is null");
 582
 583         CanvasUtils.scheduleZoomToFit(swt, () -> disposed, canvasContext, diagram);
 584     }
 585
 586     /**
 587      * Subclasses may override but should always invoke super.
 588      *
 589      * @param diagram
 590      * @param initialHints
 591      * @throws DatabaseException
 592      */
 593     protected void fillInitialDiagramHints(Resource diagram, IHintContext initialHints) throws DatabaseException {
 594         IModelingRules modelingRules = sessionContext.getSession().syncRequest(
 595                 DiagramRequests.getModelingRules(diagram, null));
 596         if (modelingRules != null) {
 597             initialHints.setHint(DiagramModelHints.KEY_MODELING_RULES, modelingRules);
 598             initialHints.setHint(DiagramHints.CONNECTION_ADVISOR,
 599                     getConnectionAdvisor(modelingRules, sessionContext.getSession()));
 600         }
 601
 602         initialHints.setHint(SynchronizationHints.COPY_ADVISOR, getCopyAdvisor());
 603         initialHints.setHint(DiagramHints.KEY_USE_CONNECTION_FLAGS, Boolean.TRUE);
 604         initialHints.setHint(DiagramHints.KEY_ALLOW_CONNECTION_BRANCHING, Boolean.TRUE);
 605         initialHints.setHint(DiagramHints.KEY_ALLOW_ROUTE_POINTS, Boolean.TRUE);
 606     }
 607
 608     /**
 609      * @param monitor the progress monitor to use for reporting progress to the
 610      *        user. It is the caller's responsibility to call done() on the
 611      *        given monitor. Accepts <code>null</code>, indicating that no
 612      *        progress should be reported and that the operation cannot be
 613      *        cancelled.
 614      * @param r
 615      * @return
 616      * @throws DatabaseException
 617      */
 618     protected IDiagram loadDiagram(IProgressMonitor monitor, final Resource r) throws DatabaseException {
 619         // Pre-load modeling rules and possibly other hints too since they are
 620         // needed already while loading the diagram contents.
 621         IHintContext initialHints = new HintContext();
 622         fillInitialDiagramHints(r, initialHints);
 623         IDiagram d = loadDiagram(monitor, r, initialHints);
 624         return d;
 625     }
 626
 627     /**
 628      * @param monitor the progress monitor to use for reporting progress to the
 629      *        user. It is the caller's responsibility to call done() on the
 630      *        given monitor. Accepts <code>null</code>, indicating that no
 631      *        progress should be reported and that the operation cannot be
 632      *        cancelled.
 633      * @param diagram
 634      * @param initialHints
 635      * @return
 636      * @throws DatabaseException
 637      */
 638     protected IDiagram loadDiagram(IProgressMonitor monitor, Resource diagram, IHintContext initialHints) throws DatabaseException {
 639         RuntimeDiagramManager rtdm = runtimeDiagramManager;
 640         Resource runtimeDiagram = rtdm != null ? rtdm.getRuntimeDiagram() : null;
 641         IDiagramLoader loader = synchronizer;
 642         if (rtdm == null || runtimeDiagram == null || loader == null)
 643                 return null;
 644         IDiagram d = sessionContext.getSession().syncRequest(
 645                 DiagramRequests.loadDiagram(monitor, getResourceEditorInput().getModel(null), diagram,
 646                         runtimeDiagram, null, loader, initialHints));
 647         return d;
 648     }
 649
 650     protected void beforeSetDiagram(IDiagram diagram) {
 651     }
 652
 653     protected PointerInteractor getPointerInteractor() {
 654         return new PointerInteractor2(true, true, true, false, true, false, synchronizer.getElementClassProvider());
 655     }
 656
 657     protected IConnectionAdvisor getConnectionAdvisor(IModelingRules modelingRules, Session session) {
 658         return new ModelledConnectionAdvisor(modelingRules, sessionContext.getSession());
 659     }
 660
 661     protected GraphToDiagramSynchronizer createSynchronizer(final ICanvasContext ctx, final ISessionContext sessionContext) {
 662         try {
 663             return sessionContext.getSession().syncRequest(new Read<GraphToDiagramSynchronizer>() {
 664                 @Override
 665                 public GraphToDiagramSynchronizer perform(ReadGraph graph) throws DatabaseException {
 666                     GraphToDiagramSynchronizer sync = new GraphToDiagramSynchronizer(graph, ctx, createElementClassProvider(graph));
 667                     initializeSynchronizationContext(graph, sync);
 668                     return sync;
 669                 }
 670             });
 671         } catch (DatabaseException e) {
 672             throw new UnsupportedOperationException("Failed to initialize data model synchronizer", e);
 673         }
 674     }
 675
 676     protected void initializeSynchronizationContext(ReadGraph graph, IModifiableSynchronizationContext context) {
 677         context.set(ModelingSynchronizationHints.MODELING_RESOURCE, ModelingResources.getInstance(graph));
 678     }
 679
 680     protected IElementClassProvider createElementClassProvider(ReadGraph graph) {
 681         DiagramResource dr = DiagramResource.getInstance(graph);
 682         return ElementClassProviders.mappedProvider(
 683                 ElementClasses.CONNECTION, ConnectionClass.CLASS.newClassWith(new StaticObjectAdapter(dr.RouteGraphConnection)),
 684                 ElementClasses.FLAG, FlagClassFactory.createFlagClass(dr.Flag, dr.Flag_Terminal)
 685         );
 686     }
 687
 688     protected SimpleElementTransformHandler getTransformHandler() {
 689         return new SimpleElementTransformHandler(true, true, true);
 690     }
 691
 692     public void initializeCanvasContext(CanvasContext ctx) {
 693         IHintContext h = ctx.getDefaultHintContext();
 694
 695         // The canvas context should not be painted until it is ready to avoid
 696         // unnecessary visual glitches.
 697         h.setHint(Hints.KEY_DISABLE_PAINTING, Boolean.TRUE);
 698
 699         Object task = BEGIN("createSynchronizer");
 700         this.synchronizer = createSynchronizer(ctx, sessionContext);
 701         END(task);
 702
 703         EContextService contextService = getPart().getContext().get(EContextService.class);
 704         contextUtil = new ContextUtil(contextService, swt);
 705
 706         // Support & Util Participants
 707         ctx.add(new TransformUtil());
 708         ctx.add(new MouseUtil());
 709         ctx.add(new KeyUtil());
 710         ctx.add(contextUtil);
 711         ctx.add(new WorkbenchStatusLine(statusLineManager));
 712         ctx.add(new CanvasGrab());
 713         ctx.add(new SymbolUtil());
 714         ctx.add(new TimeParticipant());
 715         ctx.add(new CanvasBoundsParticipant());
 716         ctx.add(new Notifications());
 717
 718         ctx.add(new SGFocusParticipant(c, DIAGRAMMING_CONTEXT));
 719
 720         // Debug participant(s)
 721         // ctx.add( new PointerPainter() );
 722         // ctx.add( new HandPainter() );
 723         h.setHint(PointerPainter.KEY_PAINT_POINTER, true);
 724
 725         // Pan & Zoom & Rotate
 726         addViewManipulationParticipants(ctx);
 727
 728         ctx.add(getTransformHandler());
 729         ctx.add(new ExpandSelectionHandler(statusLineManager));
 730
 731         // Key bindings
 732         addKeyBindingParticipants(ctx);
 733
 734         // Grid & Ruler & Background
 735         ctx.add(new GridPainter());
 736         ctx.add(new RulerPainter());
 737         ctx.add(new BackgroundPainter());
 738
 739         h.setHint(Hints.KEY_DISPLAY_PAGE, diagramPreferences.get(DiagramPreferences.P_DISPLAY_PAGE_SIZE));
 740         h.setHint(Hints.KEY_DISPLAY_MARGINS, diagramPreferences.get(DiagramPreferences.P_DISPLAY_MARGINS));
 741         ctx.add(new PageBorderParticipant());
 742
 743         // h.setHint(Hints.KEY_GRID_COLOR, new Color(0.9f, 0.9f, 0.9f));
 744         // h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.LIGHT_GRAY);
 745         h.setHint(Hints.KEY_GRID_COLOR, new Color(0.9f, 0.9f, 0.9f));
 746         h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.WHITE);
 747         h.setHint(RulerPainter.KEY_RULER_BACKGROUND_COLOR, new Color(0.9f, 0.9f, 0.9f, 0.75f));
 748         h.setHint(RulerPainter.KEY_RULER_TEXT_COLOR, Color.BLACK);
 749
 750         ////// Diagram Participants //////
 751         addDiagramParticipants(ctx);
 752         addPainterParticipants(ctx);
 753
 754         /////// D'n'D ///////
 755         addDropParticipants(ctx);
 756
 757         h.setHint(ElementPainter.KEY_SELECTION_FRAME_COLOR, Color.MAGENTA);
 758         h.setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 759
 760         h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 100000.0);
 761         h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 10.0);
 762
 763         Double snapResolution = diagramPreferences.get(DiagramPreferences.P_SNAP_GRID_SIZE);
 764         this.snapAdvisor = new GridSnapAdvisor(snapResolution);
 765         h.setHint(DiagramHints.SNAP_ADVISOR, this.snapAdvisor);
 766         h.setHint(GridPainter.KEY_GRID_SIZE, snapResolution);
 767         h.setHint(GridPainter.KEY_GRID_ENABLED, Boolean.FALSE);
 768
 769         // Workbench selection provider
 770         addStructureParticipants(ctx);
 771
 772         // Pop-up menu
 773         addPopupmenu(ctx);
 774
 775         // Load page frame description settings
 776         loadPageSettings(ctx);
 777
 778         addOtherParticipants(ctx);
 779
 780         ctx.assertParticipantDependencies();
 781         ctx.setLocked(false);
 782     }
 783
 784     protected void loadPageSettings(ICanvasContext ctx) {
 785         DiagramDesc diagramDesc = null;
 786
 787         // load diagram page configuration
 788         if (diagramResource != null) {
 789             try {
 790                 diagramDesc = sessionContext.getSession().syncRequest(DiagramRequests.getDiagramDesc(diagramResource));
 791             } catch (DatabaseException e) {
 792                 ErrorLogger.defaultLogError(e);
 793             }
 794         }
 795
 796         if (diagramDesc == null) {
 797             // Take page description from the preferences if nothing else is available.
 798             final DiagramDesc desc = diagramDesc = diagramPreferences.getDiagramDesc();
 799
 800             // Write page configuration to graph
 801             sessionContext.getSession().asyncRequest(new WriteRequest() {
 802                 @Override
 803                 public void perform(WriteGraph graph) throws DatabaseException {
 804                         CommonDBUtils.selectClusterSet(graph, diagramResource);
 805                     DiagramGraphUtil.setDiagramDesc(graph, diagramResource, desc);
 806                 }
 807             }, new Callback<DatabaseException>() {
 808                 @Override
 809                 public void run(DatabaseException parameter) {
 810                     if (parameter != null)
 811                         ErrorLogger.defaultLogError("Failed to write default diagram page description to database, see exception for details", parameter);
 812                 }
 813             });
 814         }
 815
 816         setDiagramDesc(ctx, diagramDesc);
 817
 818         // Create a listener to react to page setting changes.
 819         sessionContext.getSession().asyncRequest(DiagramRequests.getDiagramDesc(diagramResource),
 820                 new ListenerDelegate<DiagramDesc>(this) {
 821             @Override
 822             public void execute(final DiagramDesc result) {
 823                 if (result != null && canvasContext != null) {
 824                     ThreadUtils.asyncExec(canvasContext.getThreadAccess(), new Runnable() {
 825                         @Override
 826                         public void run() {
 827                             if (!disposed)
 828                                 setDiagramDesc(canvasContext, result);
 829                         }
 830                     });
 831                 }
 832             }
 833         });
 834     }
 835
 836     protected void setDiagramDesc(ICanvasContext ctx, DiagramDesc diagramDesc) {
 837         if (diagramDesc == null)
 838             throw new NullPointerException("null diagram desc");
 839
 840         if (diagramDesc.equals(this.diagramDesc))
 841             return;
 842
 843         this.diagramDesc = diagramDesc;
 844         IHintContext hints = ctx.getDefaultHintContext();
 845         hints.setHint(Hints.KEY_PAGE_DESC, diagramDesc.getPageDesc());
 846         hints.setHint(Hints.KEY_DISPLAY_PAGE, diagramDesc.isPageBordersVisible());
 847         hints.setHint(Hints.KEY_DISPLAY_MARGINS, diagramDesc.isMarginsVisible());
 848         hints.setHint(GridPainter.KEY_GRID_ENABLED, diagramDesc.isGridVisible());
 849         hints.setHint(RulerPainter.KEY_RULER_ENABLED, diagramDesc.isRulerVisible());
 850         snapAdvisor.setResolution(diagramDesc.getGridSize());
 851         hints.setHint(GridPainter.KEY_GRID_SIZE, diagramDesc.getGridSize());
 852     }
 853
 854     /**
 855      * Must be invoked from the AWT thread only.
 856      *
 857      * @param state
 858      * @param ctx
 859      */
 860     protected void applyEditorState(final EditorState state, final ICanvasContext ctx) {
 861         final IDiagram diagram = ctx.getHintStack().getHint(DiagramHints.KEY_DIAGRAM);
 862
 863         if (state.viewTransform != null && state.viewTransform.getDeterminant() != 0) {
 864             for (PanZoomRotateHandler h : ctx.getItemsByClass(PanZoomRotateHandler.class)) {
 865                 h.setTransform(state.viewTransform);
 866             }
 867         }
 868
 869         if (diagram != null) {
 870             if (state.viewTransform != null)
 871                 diagram.removeHint(DiagramHints.KEY_INITIAL_ZOOM_TO_FIT);
 872
 873             if (state.toolMode != null)
 874                 ctx.getDefaultHintContext().setHint(Hints.KEY_TOOL, state.toToolMode());
 875             else
 876                 ctx.getDefaultHintContext().setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 877
 878             final Set<IElement> selected = DiagramEditorStates.toElements(state.selection, diagram);
 879             if (!selected.isEmpty()) {
 880                 for (Selection s : ctx.getItemsByClass(Selection.class)) {
 881                     s.setSelection(0, selected);
 882                 }
 883             }
 884         }
 885     }
 886
 887     protected EditorState getSavedEditorState(ICanvasContext ctx) {
 888         return DiagramEditorStates.toEditorState(ctx, true, true, true);
 889     }
 890
 891     protected void saveEditorState(ICanvasContext ctx) {
 892         DiagramEditorStates.saveEditorState(PREFERENCE_VIRTUAL_GRAPH, diagramResource, getSavedEditorState(ctx) , DiagramViewer.this);
 893     }
 894
 895     private boolean firstFocus = true;
 896
 897     public void setFocus() {
 898
 899         if(c != null) {
 900                 c.setFocus();
 901
 902                 if (firstFocus) {
 903                     // This is a workaround for using the symbol viewer in multi-page
 904                     // editors which causes the first zoom-to-fit scheduling to happen
 905                     // already before the controls have been laid out properly.
 906                     firstFocus = false;
 907                     firstTimeSetFocus();
 908                 }
 909
 910         }
 911
 912     }
 913
 914     protected void firstTimeSetFocus() {
 915         // [Tuukka@2010-02-11]
 916         // Removed since this is actually a workaround for multi-page editors.
 917         //scheduleZoomToFit();
 918     }
 919
 920     public void dispose() {
 921         // Deactivate all contexts here because after this the context service
 922         // in question will not be available.
 923         if (contextUtil != null) {
 924             contextUtil.deactivateAll();
 925         }
 926
 927         disposed = true;
 928         if (activation != null) {
 929             activation.deactivate();
 930             activation = null;
 931         }
 932
 933         if (resourceManager != null) {
 934                 resourceManager.dispose();
 935                 resourceManager = null;
 936         }
 937         //super.dispose();
 938     }
 939
 940 //    protected Resource getInputResource() {
 941 //        return getResourceInput().getResource();
 942 //    }
 943 //
 944 //    public IResourceEditorInput getResourceInput() {
 945 //        return (IResourceEditorInput) getEditorInput();
 946 //    }
 947 //
 948 //    public IResourceEditorInput2 getResourceInput2() {
 949 //        return (IResourceEditorInput2) getEditorInput();
 950 //    }
 951
 952     public void init(DiagramViewerHost _host, MPart part, IResourceEditorInput2 input) {
 953
 954         if (!(input instanceof IResourceEditorInput))
 955             throw new RuntimeException("Invalid input: must be IResourceEditorInput");
 956
 957         setHost(_host);
 958         setPart(part);
 959         setResourceEditorInput(input);
 960
 961         // Set initial part name according to the name given by IEditorInput
 962         host.doSetPartName(getResourceEditorInput().getName());
 963
 964         Session session = SimanticsUI.peekSession();
 965         if (session != null) {
 966             Supplier<Boolean> disposedCallback = () -> disposed;
 967             Display display = part.getContext().get(Shell.class).getDisplay();
 968             session.asyncRequest(
 969                     new TitleRequest(part.getElementId(), getResourceEditorInput()),
 970                     new TitleUpdater(display, host::doSetPartName, disposedCallback));
 971             session.asyncRequest(
 972                     new ToolTipRequest(part.getElementId(), getResourceEditorInput()),
 973                     new TitleUpdater(display, host::doSetTitleToolTip, disposedCallback));
 974         }
 975
 976         try {
 977             // Read previous editor state from the database
 978             editorState = DiagramEditorStates.readEditorState(getResourceEditorInput().getResource());
 979         } catch (DatabaseException e) {
 980             exception(e);
 981         }
 982     }
 983
 984     @SuppressWarnings("rawtypes")
 985     @Override
 986     public Object getAdapter(Class adapter) {
 987 //        System.out.println("diagramViewer getAdapter " + adapter);
 988         // Property view support
 989         if (adapter == IPropertyPage.class)
 990             return createPropertyPage(getPart(), getPropertyPageContexts());
 991         // Provide symbols for the editor
 992         if (adapter == SymbolProviderFactory.class) {
 993             try {
 994                 return DiagramTypeUtils.readSymbolProviderFactory(sessionContext.getSession(), diagramResource);
 995             } catch (DatabaseException e) {
 996                 ErrorLogger.defaultLogError(getClass() + " failed to adapt to SymbolProviderFactory, see exception for details.", e);
 997                 return null;
 998             }
 999         }
1000         // Outline view support
1001         if (adapter == IContentOutlinePage.class)
1002             return new DiagramOutlinePage(sessionContextProvider, getResourceEditorInput());
1003         // Role view support
1004         if (adapter == ILayersViewPage.class)
1005             return new DiagramLayersPage(sourceDiagram, canvasContext);
1006         // Support external steering of the diagram canvas, zooming etc.
1007         if (adapter == ICanvasContext.class)
1008             return canvasContext;
1009         // Support scene graph debugger view
1010         if (adapter == INode.class) {
1011             if (canvasContext != null) {
1012                 INode node = canvasContext.getCanvasNode();
1013                 if (node != null)
1014                     return NodeUtil.getRootNode(node);
1015             }
1016             return null;
1017         }
1018         // Support retrieval of the current diagram.
1019         if (adapter == IDiagram.class)
1020             return sourceDiagram;
1021         // Why is this here ??
1022         if (adapter == Session.class)
1023             return sessionContext.getSession();
1024         if(adapter == RuntimeDiagramManager.class)
1025             return runtimeDiagramManager;
1026         if (adapter == Resource.class)
1027             return getRuntime();
1028         if (adapter == ICanvasChassis.class)
1029                 return c;
1030
1031         return null;
1032     }
1033
1034     //-------------------------------------------------------------------------
1035     // Profiling aid
1036
1037     protected static Object BEGIN(String name) {
1038         if (PROFILE) {
1039             //return ThreadLog.BEGIN(name);
1040         }
1041         return null;
1042     }
1043
1044     protected static void END(Object task) {
1045         if (PROFILE) {
1046             //((Task) task).end();
1047         }
1048     }
1049
1050     //-------------------------------------------------------------------------
1051     // implement ListenerSupport
1052
1053     @Override
1054     public void exception(Throwable t) {
1055         ErrorLogger.defaultLogError(t);
1056     }
1057
1058     @Override
1059     public boolean isDisposed() {
1060         return disposed;
1061     }
1062
1063     protected void collectGarbage() {
1064         SessionGarbageCollectorJob.getInstance().schedule(0);
1065         AWTThread.getThreadAccess().asyncExec(new Runnable() {
1066             @Override
1067             public void run() {
1068                 //System.out.println("BEFORE CLEAR: " + SVGCache.getSVGUniverse().report());
1069                 SVGCache.getSVGUniverse().clearUnreferenced();
1070                 //System.out.println("AFTER CLEAR: " + SVGCache.getSVGUniverse().report());
1071             }
1072         });
1073     }
1074
1075     //-------------------------------------------------------------------------
1076     // Listener for certain canvas context hint changes
1077
1078     IHintListener canvasHintListener = new HintListenerAdapter() {
1079         @Override
1080         public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {
1081             if (key == GridPainter.KEY_GRID_ENABLED) {
1082                 boolean v = Boolean.TRUE.equals(newValue);
1083                 if (diagramDesc.isGridVisible() != v)
1084                     setGlobalPreference(DiagramResource.URIs.DisplayGrid, v);
1085             } else if (key == RulerPainter.KEY_RULER_ENABLED) {
1086                 boolean v = Boolean.TRUE.equals(newValue);
1087                 if (diagramDesc.isRulerVisible() != v)
1088                     setGlobalPreference(DiagramResource.URIs.DisplayRuler, v);
1089             }
1090         }
1091     };
1092
1093     private <T> void setGlobalPreference(final String preferenceURI, boolean value) {
1094         TagUtil.execute(Simantics.getSession(), PREFERENCE_VIRTUAL_GRAPH, preferenceURI, value, Simantics.getProjectResource());
1095     }
1096
1097     /*
1098      * --------------------------------------------------------------------
1099      * Changes related to removal of EditorPart extension from here on down
1100      * --------------------------------------------------------------------
1101      */
1102
1103     private MPart part;
1104     private DiagramViewerHost host;
1105     private IResourceEditorInput2 resourceEditorInput = null;
1106
1107     public MPart getPart() {
1108         return part;
1109     }
1110
1111 //    public IEditorSite getEditorSite() {
1112 //        return (IEditorSite) getSite();
1113 //    }
1114
1115 //    public IEditorInput getEditorInput() {
1116 //        return editorInput;
1117 //    }
1118
1119 //    protected void setPartName(String partName) {
1120 ////        if (compatibilityTitleListener != null) {
1121 ////            removePropertyListener(compatibilityTitleListener);
1122 ////            compatibilityTitleListener = null;
1123 ////        }
1124 ////
1125 ////        super.setPartName(partName);
1126 //    }
1127
1128 //    protected void setTitleToolTip(String toolTip) {
1129 ////        toolTip = Util.safeString(toolTip);
1130 ////        //Do not send changes if they are the same
1131 ////        if (Util.equals(this.toolTip, toolTip)) {
1132 ////                    return;
1133 ////            }
1134 ////        this.toolTip = toolTip;
1135 ////        firePropertyChange(IWorkbenchPart.PROP_TITLE);
1136 //    }
1137
1138     protected void setHost(DiagramViewerHost host) {
1139         this.host = host;
1140     }
1141
1142     protected void setPart(MPart part) {
1143         this.part = part;
1144     }
1145
1146     protected void setResourceEditorInput(IResourceEditorInput2 input) {
1147         Assert.isLegal(input != null);
1148         resourceEditorInput = input;
1149     }
1150
1151     public IResourceEditorInput2 getResourceEditorInput() {
1152         return resourceEditorInput;
1153     }
1154
1155     public Composite getComposite() {
1156         return c;
1157     }
1158
1159 }