eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/derivate/DerivateView.java

   1 package eu.etaxonomy.taxeditor.editor.view.derivate;
   2
   3 import java.util.ArrayList;
   4 import java.util.Arrays;
   5 import java.util.Collection;
   6 import java.util.Collections;
   7 import java.util.HashMap;
   8 import java.util.HashSet;
   9 import java.util.List;
  10 import java.util.Map;
  11 import java.util.Set;
  12 import java.util.UUID;
  13
  14 import javax.annotation.PostConstruct;
  15 import javax.annotation.PreDestroy;
  16 import javax.inject.Inject;
  17 import javax.inject.Named;
  18
  19 import org.eclipse.core.runtime.IProgressMonitor;
  20 import org.eclipse.e4.core.di.annotations.Optional;
  21 import org.eclipse.e4.ui.di.Focus;
  22 import org.eclipse.e4.ui.di.Persist;
  23 import org.eclipse.e4.ui.model.application.ui.MDirtyable;
  24 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  25 import org.eclipse.e4.ui.services.EMenuService;
  26 import org.eclipse.e4.ui.services.IServiceConstants;
  27 import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
  28 import org.eclipse.jface.util.LocalSelectionTransfer;
  29 import org.eclipse.jface.viewers.AbstractTreeViewer;
  30 import org.eclipse.jface.viewers.ISelection;
  31 import org.eclipse.jface.viewers.ISelectionChangedListener;
  32 import org.eclipse.jface.viewers.IStructuredSelection;
  33 import org.eclipse.jface.viewers.StructuredSelection;
  34 import org.eclipse.jface.viewers.TreeNode;
  35 import org.eclipse.jface.viewers.TreeSelection;
  36 import org.eclipse.jface.viewers.TreeViewer;
  37 import org.eclipse.swt.SWT;
  38 import org.eclipse.swt.dnd.DND;
  39 import org.eclipse.swt.dnd.Transfer;
  40 import org.eclipse.swt.layout.GridData;
  41 import org.eclipse.swt.layout.GridLayout;
  42 import org.eclipse.swt.widgets.Composite;
  43 import org.eclipse.swt.widgets.Tree;
  44 import org.eclipse.ui.IMemento;
  45
  46 import eu.etaxonomy.cdm.api.conversation.ConversationHolder;
  47 import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;
  48 import eu.etaxonomy.cdm.api.service.IOccurrenceService;
  49 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  50 import eu.etaxonomy.cdm.model.common.CdmBase;
  51 import eu.etaxonomy.cdm.model.molecular.SingleRead;
  52 import eu.etaxonomy.cdm.model.occurrence.FieldUnit;
  53 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
  54 import eu.etaxonomy.cdm.model.taxon.Taxon;
  55 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  56 import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;
  57 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  58 import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;
  59 import eu.etaxonomy.taxeditor.editor.l10n.Messages;
  60 import eu.etaxonomy.taxeditor.editor.view.derivate.searchFilter.DerivateSearchCompositeController;
  61 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  62 import eu.etaxonomy.taxeditor.model.IContextListener;
  63 import eu.etaxonomy.taxeditor.model.IDirtyMarkable;
  64 import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;
  65 import eu.etaxonomy.taxeditor.model.IPartContentHasFactualData;
  66 import eu.etaxonomy.taxeditor.model.IPartContentHasMedia;
  67 import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;
  68 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  69 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  70 import eu.etaxonomy.taxeditor.session.ICdmEntitySession;
  71 import eu.etaxonomy.taxeditor.session.ICdmEntitySessionEnabled;
  72 import eu.etaxonomy.taxeditor.store.CdmStore;
  73 import eu.etaxonomy.taxeditor.view.derivateSearch.DerivateContentProvider;
  74 import eu.etaxonomy.taxeditor.view.derivateSearch.DerivateLabelProvider;
  75 import eu.etaxonomy.taxeditor.workbench.part.IE4SavablePart;
  76
  77 /**
  78  * Displays the derivate hierarchy of the specimen specified in the editor input.
  79  *
  80  */
  81 public class DerivateView implements IPartContentHasFactualData, IConversationEnabled,
  82         ICdmEntitySessionEnabled, IDirtyMarkable, IPostOperationEnabled, IPartContentHasDetails, IPartContentHasSupplementalData, IPartContentHasMedia,
  83         IContextListener, IE4SavablePart {
  84
  85     private static final String SPECIMEN_EDITOR = Messages.DerivateView_SPECIMEN_EDITOR;
  86
  87     public static final String ID = "eu.etaxonomy.taxeditor.editor.view.derivate.DerivateView"; //$NON-NLS-1$
  88     public static final String INPUT_ID = ID+".editorInput"; //$NON-NLS-1$
  89
  90     public static final String YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION = Messages.DerivateView_YOU_NEED_TO_SAVE;
  91     public static final String VIEW_HAS_UNSAVED_CHANGES = Messages.DerivateView_UNSAVED_CHANGES;
  92
  93     private static final List<String> SPECIMEN_INIT_STRATEGY = Arrays.asList(new String[] {
  94             "descriptions", //$NON-NLS-1$
  95             "annotations", //$NON-NLS-1$
  96             "markers", //$NON-NLS-1$
  97             "credits", //$NON-NLS-1$
  98             "extensions", //$NON-NLS-1$
  99             "rights", //$NON-NLS-1$
 100             "sources", //$NON-NLS-1$
 101             "derivationEvents.derivatives.annotations", //$NON-NLS-1$
 102             "derivationEvents.derivatives.markers", //$NON-NLS-1$
 103             "derivationEvents.derivatives.credits", //$NON-NLS-1$
 104             "derivationEvents.derivatives.extensions", //$NON-NLS-1$
 105             "derivationEvents.derivatives.rights", //$NON-NLS-1$
 106             "derivationEvents.derivatives.sources" //$NON-NLS-1$
 107     });
 108
 109         private static final int WARN_THRESHOLD = 200;
 110
 111
 112         private ConversationHolder conversation;
 113
 114         private TreeViewer viewer;
 115
 116     private final int dndOperations = DND.DROP_MOVE;
 117
 118     private DerivateLabelProvider labelProvider;
 119
 120     private DerivateContentProvider contentProvider;
 121
 122     private DerivateSearchCompositeController derivateSearchCompositeController;
 123
 124     /**
 125      * A map with keys being the derivative entities belonging to the {@link UUID}s passed to the constructor
 126      * and values being the root elements of the hierarchy (may be the same objects as the derivative entities)
 127      */
 128     private Map<SpecimenOrObservationBase<?>, SpecimenOrObservationBase<?>> derivateToRootEntityMap;
 129
 130     /**
 131      * The set of root elements
 132      */
 133     private Set<SpecimenOrObservationBase<?>> rootElements;
 134
 135     private ICdmEntitySession cdmEntitySession;
 136
 137     /**
 138      * <code>true</code> if this view is listening to selection  changes
 139      */
 140     private boolean listenToSelectionChange;
 141
 142     private Taxon selectedTaxon;
 143
 144     @Inject
 145     private ESelectionService selService;
 146
 147     @Inject
 148     private MDirtyable dirty;
 149
 150     private ISelectionChangedListener selectionChangedListener;
 151
 152     /**
 153      * Default constructor
 154      */
 155     @Inject
 156     public DerivateView() {
 157     }
 158
 159     /**
 160      * {@inheritDoc}
 161      */
 162     public void init(DerivateViewEditorInput editorInput){
 163         this.derivateToRootEntityMap = new HashMap<>();
 164         this.rootElements = new HashSet<>();
 165
 166         //init tree
 167         Collection<UUID> derivativeUuids = editorInput.getDerivativeUuids();
 168         checkWarnThreshold(derivativeUuids);
 169         updateRootEntities(derivativeUuids);
 170         //set taxon filter
 171         derivateSearchCompositeController.setTaxonFilter(editorInput.getTaxonUuid());
 172         //reset status bar
 173         //TODO e4
 174 //        getEditorSite().getActionBars().getStatusLineManager().setMessage(""); //$NON-NLS-1$
 175     }
 176
 177     @PostConstruct
 178     public void createPartControl(Composite parent, EMenuService menuService) {
 179         if (CdmStore.isActive()){
 180             if(conversation == null){
 181                 conversation = CdmStore.createConversation();
 182             }
 183             if(cdmEntitySession!=null){
 184                 cdmEntitySession = CdmStore.getCurrentSessionManager().newSession(this, true);
 185             }
 186         }
 187         else{
 188             return;
 189         }
 190         //listen to context changes
 191         CdmStore.getContextManager().addContextListener(this);
 192
 193         parent.setLayout(new GridLayout());
 194
 195         //---search and filter---
 196         derivateSearchCompositeController = new DerivateSearchCompositeController(parent, this);
 197         GridData gridDataSearchBar = new GridData();
 198         gridDataSearchBar.horizontalAlignment = GridData.FILL;
 199         gridDataSearchBar.grabExcessHorizontalSpace = true;
 200         derivateSearchCompositeController.setLayoutData(gridDataSearchBar);
 201         derivateSearchCompositeController.setEnabled(CdmStore.isActive());
 202
 203         //---tree viewer---
 204         viewer = new TreeViewer(new Tree(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION));
 205         GridData gridDataTree = new GridData();
 206         gridDataTree.horizontalAlignment = GridData.FILL;
 207         gridDataTree.verticalAlignment = GridData.FILL;
 208         gridDataTree.grabExcessVerticalSpace = true;
 209         gridDataTree.grabExcessHorizontalSpace = true;
 210         viewer.getTree().setLayoutData(gridDataTree);
 211         contentProvider = new DerivateContentProvider();
 212         viewer.setContentProvider(contentProvider);
 213         labelProvider = new DerivateLabelProvider();
 214         labelProvider.setConversation(conversation);
 215         viewer.setLabelProvider(labelProvider);
 216         viewer.setAutoExpandLevel(AbstractTreeViewer.ALL_LEVELS);
 217         viewer.getTree().setEnabled(CdmStore.isActive());
 218
 219         //propagate selection
 220         selectionChangedListener = (event -> selService.setSelection(AbstractUtility.getElementsFromSelectionChangedEvent(event)));
 221         viewer.addSelectionChangedListener(selectionChangedListener);
 222
 223         //create context menu
 224         menuService.registerContextMenu(viewer.getControl(), "eu.etaxonomy.taxeditor.editor.popupmenu.specimeneditor");
 225
 226         //add drag'n'drop support
 227         Transfer[] transfers = new Transfer[] {LocalSelectionTransfer.getTransfer(),};
 228         viewer.addDragSupport(dndOperations, transfers, new DerivateDragListener(this));
 229         viewer.addDropSupport(dndOperations, transfers, new DerivateDropListener(this));
 230     }
 231
 232     public void updateRootEntities() {
 233         updateRootEntities((Collection)null);
 234     }
 235
 236     public void updateRootEntities(Collection<UUID> derivativeUuids) {
 237         if(conversation!=null){
 238             if (!conversation.isBound()) {
 239                 conversation.bind();
 240             }
 241             /*
 242              * If the active session is not the session of the Derivative Editor
 243              * then we will save the active session for later, bind temporarily
 244              * to our session and rebind to the original session when we are
 245              * done. This happens e.g. if a selection change happens in the
 246              * taxon editor and "Link with editor" is enabled. The selection
 247              * change event and thus the loading in updateRootEntities() happens
 248              * in the session of the taxon editor.
 249              */
 250             ICdmEntitySession previousCdmEntitySession = CdmStore.getCurrentSessionManager().getActiveSession();
 251             if(cdmEntitySession != null) {
 252                 cdmEntitySession.bind();
 253             }
 254
 255             List<SpecimenOrObservationBase> derivates = null;
 256             if(derivativeUuids!=null){
 257                 this.derivateToRootEntityMap = new HashMap<>();
 258                 this.rootElements = new HashSet<>();
 259                 derivates = CdmStore.getService(IOccurrenceService.class).load(new ArrayList(derivativeUuids), SPECIMEN_INIT_STRATEGY);
 260             }
 261             updateRootEntities(derivates);
 262             if(previousCdmEntitySession!=null){
 263                 previousCdmEntitySession.bind();
 264             }
 265         }
 266     }
 267
 268
 269     public void updateRootEntities(List<SpecimenOrObservationBase> derivates) {
 270         if(derivates!=null){
 271             this.derivateToRootEntityMap = new HashMap<>();
 272             this.rootElements = new HashSet<>();
 273             for (SpecimenOrObservationBase derivate : derivates) {
 274
 275                 if(derivate instanceof FieldUnit){
 276                     derivateToRootEntityMap.put(derivate, derivate);
 277                 }
 278                 else {
 279                     SpecimenOrObservationBase<?> topMostDerivate = EditorUtil.getTopMostDerivate(derivate);
 280                     if(topMostDerivate!=null){
 281                         derivateToRootEntityMap.put(derivate, topMostDerivate);
 282                     }
 283                     else{
 284                         derivateToRootEntityMap.put(derivate, derivate);
 285                     }
 286                 }
 287             }
 288             for (SpecimenOrObservationBase<?> specimen : derivateToRootEntityMap.values()) {
 289                 rootElements.add(specimen);
 290             }
 291         }
 292         labelProvider.updateLabelCache(rootElements);
 293         viewer.setInput(rootElements);
 294
 295         //TODO e4
 296         //            getEditorSite().getActionBars().getStatusLineManager().setMessage(String.format(Messages.DerivateView_CNT_DERIVATIVES_FOUND, rootElements.size()));
 297
 298         //set selection to derivatives if the filter criteria
 299         //taxon assignment or derivative type are set
 300         if(derivates!=null && !derivateSearchCompositeController.isDefaultSearch()){
 301             List<TreeNode> nodesToSelect = new ArrayList<>();
 302             for (SpecimenOrObservationBase specimenOrObservationBase : derivates) {
 303                 nodesToSelect.add(new TreeNode(specimenOrObservationBase));
 304             }
 305             setSelection(new StructuredSelection(nodesToSelect));
 306         }
 307         else{
 308             setSelection(null);
 309         }
 310     }
 311
 312     private void setSelection(StructuredSelection selection){
 313         viewer.removeSelectionChangedListener(selectionChangedListener);
 314         viewer.setSelection(selection);
 315         viewer.addSelectionChangedListener(selectionChangedListener);
 316     }
 317
 318     public void updateLabelCache(){
 319         labelProvider.updateLabelCache(rootElements);
 320     }
 321
 322     @Persist
 323     @Override
 324     public void save(IProgressMonitor monitor) {
 325         String taskName = Messages.DerivateView_SAVING_HIERARCHY;
 326         monitor.beginTask(taskName, 3);
 327         if (!conversation.isBound()) {
 328             conversation.bind();
 329         }
 330         monitor.worked(1);
 331
 332         // commit the conversation and start a new transaction immediately
 333         conversation.commit(true);
 334
 335         CdmStore.getService(IOccurrenceService.class).merge(new ArrayList<>(rootElements), true);
 336
 337         monitor.worked(1);
 338
 339         this.setDirty(false);
 340         monitor.worked(1);
 341         monitor.done();
 342         dirty.setDirty(false);
 343         refreshTree();
 344     }
 345
 346     /**
 347      * @param isDirty the isDirty to set
 348      */
 349     public void setDirty(boolean isDirty) {
 350         dirty.setDirty(isDirty);
 351     }
 352
 353     @Focus
 354     public void setFocus() {
 355         //make sure to bind again if maybe in another view the conversation was unbound
 356         if(conversation!=null && !conversation.isBound()){
 357             conversation.bind();
 358         }
 359         if(cdmEntitySession != null) {
 360             cdmEntitySession.bind();
 361         }
 362         if(viewer!=null) {
 363             viewer.getControl().setFocus();
 364             selService.setSelection(viewer.getSelection());
 365         }
 366     }
 367
 368     @Override
 369     public void update(CdmDataChangeMap changeEvents) {
 370     }
 371
 372     @Override
 373     public ConversationHolder getConversationHolder() {
 374         return conversation;
 375     }
 376
 377     @Override
 378     public void changed(Object element) {
 379         setDirty(true);
 380         //firePropertyChange(IEditorPart.PROP_DIRTY);
 381         viewer.update(new TreeNode(element), null);
 382         viewer.refresh();
 383     }
 384
 385     @Override
 386     public void forceDirty() {
 387         changed(null);
 388     }
 389
 390     @Override
 391     public Map<Object, List<String>> getPropertyPathsMap() {
 392         List<String> specimenPropertyPaths = Arrays.asList(new String[] {
 393                 "descriptions", //$NON-NLS-1$
 394                 "derivationEvents.derivates", //$NON-NLS-1$
 395                 "annotations", //$NON-NLS-1$
 396                 "markers", //$NON-NLS-1$
 397                 "credits", //$NON-NLS-1$
 398                 "extensions", //$NON-NLS-1$
 399                 "rights", //$NON-NLS-1$
 400                 "sources" //$NON-NLS-1$
 401         });
 402         Map<Object, List<String>> specimenPropertyPathMap =
 403                 new HashMap<>();
 404         specimenPropertyPathMap.put(SpecimenOrObservationBase.class,specimenPropertyPaths);
 405         return specimenPropertyPathMap;
 406     }
 407
 408     /**
 409      * Refreshes the derivate hierarchy tree and expands the tree
 410      * to show and select the given object.
 411      *
 412      * @param expandTo the object to which the tree should be expanded
 413      */
 414     public void refreshTree(Object expandTo){
 415         refreshTree();
 416         TreeSelection selection = (TreeSelection) viewer.getSelection();
 417         viewer.expandToLevel(selection.getFirstElement(), 1);
 418         viewer.setSelection(new StructuredSelection(new TreeNode(expandTo)));
 419     }
 420
 421     /**
 422      * Refreshes the derivate hierarchy tree
 423      */
 424     public void refreshTree(){
 425         if(!viewer.getTree().isDisposed()){
 426                 viewer.refresh();
 427         }
 428     }
 429
 430     //FIXME:Remoting hack to make this work for remoting
 431     //This should actually be resolved using remoting post operations
 432     public void remove(Object obj) {
 433         if (obj instanceof TreeNode){
 434             obj = ((TreeNode)obj).getValue();
 435         }
 436         rootElements.remove(obj);
 437         Object o = this.derivateToRootEntityMap.remove(obj);
 438         viewer.setInput(rootElements);
 439     }
 440
 441     /**
 442      * @return a set of {@link SingleRead}s that have multiple parents
 443      */
 444     public Set<SingleRead> getMultiLinkSingleReads() {
 445         return DerivateLabelProvider.getMultiLinkSingleReads();
 446     }
 447
 448     public Object getSelectionInput() {
 449         return selectedTaxon;
 450     }
 451
 452     public DerivateLabelProvider getLabelProvider() {
 453         return labelProvider;
 454     }
 455
 456     @Override
 457     public boolean postOperation(CdmBase objectAffectedByOperation) {
 458         refreshTree();
 459         if(objectAffectedByOperation!=null){
 460             changed(objectAffectedByOperation);
 461         }
 462         return true;
 463     }
 464
 465     @Override
 466     public boolean onComplete() {
 467         return true;
 468     }
 469
 470
 471     @Override
 472     public boolean canAttachMedia() {
 473         return true;
 474     }
 475
 476     public void addFieldUnit(FieldUnit fieldUnit) {
 477         rootElements.add(fieldUnit);
 478         derivateToRootEntityMap.put(fieldUnit, fieldUnit);
 479     }
 480
 481     @Override
 482     public ICdmEntitySession getCdmEntitySession() {
 483         return cdmEntitySession;
 484     }
 485
 486     @PreDestroy
 487     public void dispose() {
 488         if(conversation!=null){
 489             conversation.close();
 490         }
 491         if(cdmEntitySession != null) {
 492             cdmEntitySession.dispose();
 493         }
 494     }
 495
 496
 497     @Inject
 498     @Optional
 499     public void selectionChanged(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection,
 500             @Named(IServiceConstants.ACTIVE_PART) MPart activePart, MPart thisPart)
 501     {
 502         if(activePart == thisPart || viewer==null){
 503             return;
 504         }
 505         if(viewer.getTree().isDisposed()){
 506             return;
 507         }
 508         if(listenToSelectionChange){
 509             selectedTaxon = null;
 510             if(activePart instanceof MultiPageTaxonEditor){
 511                 selectedTaxon = ((MultiPageTaxonEditor) activePart).getTaxon();
 512             }
 513             else if(selection instanceof IStructuredSelection){
 514                 Object selectedElement = ((IStructuredSelection) selection).getFirstElement();
 515                 if(selectedElement instanceof CdmBase){
 516                     if(((CdmBase) selectedElement).isInstanceOf(TaxonNode.class)){
 517                         selectedTaxon = HibernateProxyHelper.deproxy(selectedElement, TaxonNode.class).getTaxon();
 518                     }
 519                     else if(((CdmBase) selectedElement).isInstanceOf(Taxon.class)){
 520                         selectedTaxon = HibernateProxyHelper.deproxy(selectedElement, Taxon.class);
 521                     }
 522                 }
 523             }
 524             if(selectedTaxon!=null){
 525                 Collection<SpecimenOrObservationBase> fieldUnits = CdmStore.getService(IOccurrenceService.class).listFieldUnitsByAssociatedTaxon(selectedTaxon, null, null);
 526                 Collection<UUID> uuids = new HashSet<>();
 527                 for (SpecimenOrObservationBase specimenOrObservationBase : fieldUnits) {
 528                     uuids.add(specimenOrObservationBase.getUuid());
 529                 }
 530                 checkWarnThreshold(uuids);
 531                 updateRootEntities(uuids);
 532
 533                 thisPart.setLabel(SPECIMEN_EDITOR+": " + selectedTaxon.getName()); //$NON-NLS-1$
 534             }
 535             else{
 536                 updateRootEntities((Collection<UUID>)Collections.EMPTY_LIST);
 537             }
 538         }
 539     }
 540
 541         private void checkWarnThreshold(Collection<UUID> uuids) {
 542                 if(uuids!=null && uuids.size()>WARN_THRESHOLD){
 543                         MessagingUtils.warningDialog(Messages.DerivateView_PERF_WARNING, this.getClass(), String.format(Messages.DerivateView_PERF_WARNING_MESSAGE, uuids.size()));
 544                         uuids.clear();
 545                 }
 546         }
 547
 548     public TreeViewer getViewer() {
 549         return viewer;
 550     }
 551
 552     /**
 553      * {@inheritDoc}
 554      */
 555     @Override
 556     public List<SpecimenOrObservationBase<?>> getRootEntities() {
 557         return new ArrayList<>(rootElements);
 558     }
 559
 560     public void toggleListenToSelectionChange(MPart part) {
 561         listenToSelectionChange = !listenToSelectionChange;
 562         derivateSearchCompositeController.setEnabled(!listenToSelectionChange);
 563         if(!listenToSelectionChange){
 564             selectedTaxon = null;
 565             part.setLabel(SPECIMEN_EDITOR);
 566         }
 567         else if(selectedTaxon==null){
 568             part.setLabel(SPECIMEN_EDITOR+Messages.DerivateView_NO_TAXON_SELECTED);
 569         }
 570     }
 571
 572     public boolean isListenToSelectionChange(){
 573         return listenToSelectionChange;
 574     }
 575
 576     /**
 577      * {@inheritDoc}
 578      */
 579     @Override
 580     public void contextAboutToStop(IMemento memento, IProgressMonitor monitor) {
 581     }
 582
 583     /**
 584      * {@inheritDoc}
 585      */
 586     @Override
 587     public void contextStop(IMemento memento, IProgressMonitor monitor) {
 588         derivateSearchCompositeController.setEnabled(false);
 589         if(!viewer.getTree().isDisposed()) {
 590             viewer.getTree().setEnabled(false);
 591             viewer.setInput(null);
 592         }
 593     }
 594
 595     /**
 596      * {@inheritDoc}
 597      */
 598     @Override
 599     public void contextStart(IMemento memento, IProgressMonitor monitor) {
 600         derivateSearchCompositeController.setEnabled(!listenToSelectionChange);
 601         if(!viewer.getTree().isDisposed()){
 602             viewer.getTree().setEnabled(true);
 603         }
 604         refreshTree();
 605     }
 606
 607     /**
 608      * {@inheritDoc}
 609      */
 610     @Override
 611     public void contextRefresh(IProgressMonitor monitor) {
 612     }
 613
 614     /**
 615      * {@inheritDoc}
 616      */
 617     @Override
 618     public void workbenchShutdown(IMemento memento, IProgressMonitor monitor) {
 619     }
 620
 621
 622     public boolean isDirty() {
 623         return dirty.isDirty();
 624     }
 625
 626 }