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