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