org.simantics.interop.update/src/org/simantics/interop/update/editor/ModelUpdateEditor.java

   1 package org.simantics.interop.update.editor;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.HashSet;
   6 import java.util.List;
   7 import java.util.Stack;
   8
   9 import org.eclipse.jface.resource.ImageDescriptor;
  10 import org.eclipse.jface.resource.JFaceResources;
  11 import org.eclipse.jface.resource.LocalResourceManager;
  12 import org.eclipse.jface.viewers.CellEditor;
  13 import org.eclipse.jface.viewers.CheckStateChangedEvent;
  14 import org.eclipse.jface.viewers.CheckboxCellEditor;
  15 import org.eclipse.jface.viewers.CheckboxTreeViewer;
  16 import org.eclipse.jface.viewers.ColumnLabelProvider;
  17 import org.eclipse.jface.viewers.ColumnViewer;
  18 import org.eclipse.jface.viewers.ColumnViewerToolTipSupport;
  19 import org.eclipse.jface.viewers.EditingSupport;
  20 import org.eclipse.jface.viewers.ICheckStateListener;
  21 import org.eclipse.jface.viewers.IStructuredContentProvider;
  22 import org.eclipse.jface.viewers.ITreeContentProvider;
  23 import org.eclipse.jface.viewers.ITreeViewerListener;
  24 import org.eclipse.jface.viewers.TableViewer;
  25 import org.eclipse.jface.viewers.TableViewerColumn;
  26 import org.eclipse.jface.viewers.TreeExpansionEvent;
  27 import org.eclipse.jface.viewers.TreeViewerColumn;
  28 import org.eclipse.jface.viewers.Viewer;
  29 import org.eclipse.swt.SWT;
  30 import org.eclipse.swt.events.SelectionAdapter;
  31 import org.eclipse.swt.events.SelectionEvent;
  32 import org.eclipse.swt.graphics.Color;
  33 import org.eclipse.swt.graphics.Image;
  34 import org.eclipse.swt.graphics.RGB;
  35 import org.eclipse.swt.layout.FillLayout;
  36 import org.eclipse.swt.layout.GridData;
  37 import org.eclipse.swt.layout.GridLayout;
  38 import org.eclipse.swt.widgets.Button;
  39 import org.eclipse.swt.widgets.Composite;
  40 import org.eclipse.swt.widgets.Display;
  41 import org.eclipse.swt.widgets.Label;
  42 import org.eclipse.swt.widgets.Text;
  43 import org.simantics.Simantics;
  44 import org.simantics.db.ReadGraph;
  45 import org.simantics.db.Resource;
  46 import org.simantics.db.Session;
  47 import org.simantics.db.Statement;
  48 import org.simantics.db.WriteGraph;
  49 import org.simantics.db.common.request.WriteRequest;
  50 import org.simantics.db.exception.DatabaseException;
  51 import org.simantics.db.request.Read;
  52 import org.simantics.interop.test.GraphChanges;
  53 import org.simantics.interop.update.Activator;
  54 import org.simantics.interop.update.model.ModelUpdate;
  55 import org.simantics.interop.update.model.ModelUpdate.WarningListener;
  56 import org.simantics.interop.update.model.PropertyChange;
  57 import org.simantics.interop.update.model.UpdateList;
  58 import org.simantics.interop.update.model.UpdateNode;
  59 import org.simantics.interop.update.model.UpdateOp;
  60 import org.simantics.interop.update.model.UpdateStatus;
  61 import org.simantics.interop.update.model.UpdateTree;
  62 import org.simantics.interop.utils.TableUtils;
  63 import org.simantics.utils.datastructures.Pair;
  64 import org.simantics.utils.ui.ExceptionUtils;
  65
  66
  67 /**
  68  * Editor for updating models.
  69  *
  70  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  71  *
  72  */
  73 public abstract class ModelUpdateEditor extends Composite implements WarningListener{
  74
  75         private Composite errorComposite;
  76
  77         private CheckboxTreeViewer changeBrowser;
  78         private TableViewer changeViewer;
  79
  80         private Button updateAllButton;
  81         private Button updateSelectedButton;
  82
  83         private LocalResourceManager manager = new LocalResourceManager(JFaceResources.getResources());
  84
  85         private Image checked;
  86         private Image unchecked;
  87         private Image warning;
  88
  89         private Color containsColor;
  90         private Color deletedColor;
  91         private Color addedColor;
  92         private Color disabledColor;
  93
  94         private ModelUpdate update;
  95
  96
  97         private HashSet<UpdateNode> selectedStructure = new HashSet<UpdateNode>();
  98
  99         public ModelUpdateEditor(Composite parent) {
 100                 super(parent,SWT.NONE);
 101                 checked = manager.createImage(Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/tick.png"));
 102                 unchecked = manager.createImage(Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/cross.png"));
 103                 warning = manager.createImage(Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/error.png"));
 104
 105
 106                 containsColor = new Color(parent.getDisplay(), new RGB(255,255,220));
 107                 deletedColor = new Color(parent.getDisplay(), new RGB(255,220,220));
 108                 addedColor = new Color(parent.getDisplay(), new RGB(220,255,220));
 109                 disabledColor = new Color(parent.getDisplay(), new RGB(128,128,128));
 110
 111                 this.setLayout(new GridLayout(1,false));
 112
 113                 errorComposite = new Composite(this, SWT.BORDER);
 114                 GridData data = new GridData();
 115                 data.grabExcessHorizontalSpace = true;
 116                 data.grabExcessVerticalSpace = false;
 117                 data.horizontalAlignment = SWT.FILL;
 118                 data.verticalAlignment = SWT.TOP;
 119                 errorComposite.setLayoutData(data);
 120                 errorComposite.setLayout(new GridLayout(2, false));
 121
 122                 errorComposite.setVisible(false);
 123
 124 //              IEditorInput input = getEditorInput();
 125 //              if (!(input instanceof UpdateEditorInput)) {
 126 //                      Label label = new Label(composite, SWT.NONE);
 127 //                      label.setText("Unknown input.");
 128 //                      return;
 129 //              }
 130
 131                 Composite fillComposite = new Composite(this, SWT.NONE);
 132                 data = new GridData();
 133                 data.grabExcessHorizontalSpace = true;
 134                 data.grabExcessVerticalSpace = true;
 135                 data.horizontalAlignment = SWT.FILL;
 136                 data.verticalAlignment = SWT.FILL;
 137                 fillComposite.setLayoutData(data);
 138                 fillComposite.setLayout(new FillLayout(SWT.VERTICAL));
 139
 140                 {
 141                         changeBrowser = new CheckboxTreeViewer(fillComposite,SWT.MULTI|SWT.V_SCROLL|SWT.BORDER|SWT.FULL_SELECTION  );
 142
 143                         changeBrowser.setContentProvider(new UpdateTreeContentProvider());
 144
 145                         changeBrowser.getTree().setHeaderVisible(true);
 146
 147                         ColumnViewerToolTipSupport.enableFor(changeBrowser);
 148
 149
 150                         TreeViewerColumn dataColumn = TableUtils.addColumn(changeBrowser, "Data", true, 600);
 151
 152                         dataColumn.setLabelProvider(new UpdateNodeLabelProvider());
 153
 154                         changeBrowser.addCheckStateListener(new ICheckStateListener() {
 155
 156                                 @Override
 157                                 public void checkStateChanged(CheckStateChangedEvent event) {
 158                                         UpdateNode node = (UpdateNode) event.getElement();
 159                                         if (node.getOp() != null) {
 160                                                 node.getOp().select(Boolean.TRUE.equals(event.getChecked()));
 161
 162                                         }
 163                                         refreshChecked();
 164
 165                                 }
 166                         });
 167                         changeBrowser.addTreeListener(new ITreeViewerListener() {
 168
 169                                 @Override
 170                                 public void treeExpanded(TreeExpansionEvent event) {
 171                                         event.getTreeViewer().getControl().getDisplay().asyncExec(new Runnable() {
 172
 173                                                 @Override
 174                                                 public void run() {
 175                                                         // TreeViewer uses lazy load, checked states must be updated when the tree is expanded.
 176                                                         refreshChecked();
 177                                                 }
 178                                         });
 179
 180                                 }
 181
 182                                 @Override
 183                                 public void treeCollapsed(TreeExpansionEvent event) {
 184
 185                                 }
 186                         });
 187                         changeBrowser.setUseHashlookup(true);
 188
 189                 }
 190                 {
 191                         changeViewer = new TableViewer(fillComposite,SWT.MULTI|SWT.V_SCROLL|SWT.BORDER|SWT.FULL_SELECTION);
 192
 193                         changeViewer.getTable().setHeaderVisible(true);
 194                         changeViewer.getTable().setLinesVisible(true);
 195
 196                         changeViewer.setContentProvider(new ModificationListContentProvider());
 197
 198                         changeViewer.setUseHashlookup(true);
 199
 200                         TableViewerColumn cols[] = new TableViewerColumn[getChangeListColumnCount()];
 201                         TableViewerColumn selection = TableUtils.addColumn(changeViewer, getColumntTitle(0), false, false, getChangeListColumnWidth(0));
 202                         cols[0] = selection;
 203                         for (int i = 1 ; i < getChangeListColumnCount(); i++) {
 204                                 TableViewerColumn column = TableUtils.addColumn(changeViewer, getColumntTitle(i), true, getChangeListColumnSortable(i), getChangeListColumnWidth(i));
 205                                 cols[i] = column;
 206                                 column.setLabelProvider(getLabelProvider(i));
 207                                 configureChangeListColumn(i, column);
 208                         }
 209
 210                         selection.setLabelProvider(new SelectionLabelProvider());
 211                         selection.getColumn().addSelectionListener(new SelectionAdapter() {
 212                                 @Override
 213                                 public void widgetSelected(SelectionEvent e) {
 214                                         if (update.getUpdateList().getChanges().size() > 0) {
 215                                                 if (update.getUpdateList().getSelected().size() > 0) {
 216                                                         update.getUpdateList().clearSelected();
 217                                                 } else {
 218                                                         for (PropertyChange nr : update.getUpdateList().getChanges())
 219                                                                 nr.select(true);
 220                                                 }
 221                                                 changeViewer.refresh();
 222                                         }
 223                                 }
 224                         });
 225                         selection.setEditingSupport(new SelectionEditingSupport(changeViewer));
 226
 227                 }
 228                 Composite buttonComposite = new Composite(this, SWT.NONE);
 229
 230                 data = new GridData();
 231                 data.grabExcessHorizontalSpace = true;
 232                 data.grabExcessVerticalSpace = false;
 233                 data.horizontalAlignment = SWT.FILL;
 234                 data.verticalAlignment = SWT.BOTTOM;
 235
 236                 buttonComposite.setLayoutData(data);
 237
 238                 buttonComposite.setLayout(new GridLayout(3, false));
 239
 240                 Label label = new Label(buttonComposite, SWT.NONE);
 241                 data = new GridData();
 242                 data.grabExcessHorizontalSpace = true;
 243                 data.grabExcessVerticalSpace = false;
 244                 data.horizontalAlignment = SWT.FILL;
 245                 data.verticalAlignment = SWT.CENTER;
 246                 label.setLayoutData(data);
 247
 248                 updateAllButton = new Button(buttonComposite, SWT.PUSH);
 249                 updateAllButton.setText("Update All");
 250                 updateAllButton.addSelectionListener(new SelectionAdapter() {
 251                         @Override
 252                         public void widgetSelected(SelectionEvent e) {
 253                                 applyAll();
 254                         }
 255                 });
 256                 updateSelectedButton = new Button(buttonComposite, SWT.PUSH);
 257                 updateSelectedButton.setText("Update Selected");
 258                 updateSelectedButton.addSelectionListener(new SelectionAdapter() {
 259                         @Override
 260                         public void widgetSelected(SelectionEvent e) {
 261                                 applySelected();
 262                         }
 263                 });
 264         }
 265
 266         protected int getChangeListColumnCount() {
 267                 return 6;
 268         }
 269
 270         protected int getChangeListColumnWidth(int col) {
 271                 if (col == 0)
 272                         return 20;
 273                 return 100;
 274         }
 275
 276         protected boolean getChangeListColumnSortable(int col) {
 277                 if (col == 0)
 278                         return false;
 279                 return true;
 280         }
 281
 282         protected void configureChangeListColumn(int col, TableViewerColumn column) {
 283
 284         }
 285
 286         protected Session getSession() {
 287                 return Simantics.getSession();
 288         }
 289
 290         protected String getColumntTitle(int i) {
 291                 switch (i) {
 292                 case 0:
 293                         return "!";
 294                 case 1:
 295                         return "Diagram";
 296                 case 2:
 297                         return "Symbol";
 298                 case 3:
 299                         return "Property";
 300                 case 4:
 301                         return "Old Value";
 302                 case 5:
 303                         return "New Value";
 304                 default:
 305                         throw new RuntimeException("Unknown column index" + i);
 306
 307                 }
 308         }
 309
 310         protected abstract ColumnLabelProvider getLabelProvider(int i);
 311
 312         public GraphChanges getChanges() {
 313                 return update.getChanges();
 314         }
 315
 316         public UpdateTree getUpdateTree() {
 317                 return update.getUpdateTree();
 318         }
 319
 320         public UpdateList getUpdateList() {
 321                 return update.getUpdateList();
 322         }
 323
 324         public CheckboxTreeViewer getChangeBrowser() {
 325                 return changeBrowser;
 326         }
 327
 328         public TableViewer getChangeViewer() {
 329                 return changeViewer;
 330         }
 331
 332         public void showWarning(ModelUpdate update, String text) {
 333                 errorComposite.setVisible(true);
 334
 335                 Label label = new Label(errorComposite, SWT.NONE);
 336                 label.setImage(warning);
 337                 label = new Label(errorComposite, SWT.NONE);
 338                 label.setText(text);
 339                 //this.setStatusMessage("Update contains structural changes (new or deleted symbols), please create a new model.");
 340                 this.layout(true);
 341         }
 342
 343
 344         private List<ICheckStateListener> checkStateListeners = new ArrayList<>();
 345
 346
 347         public void addCheckStateListener(ICheckStateListener listener) {
 348                 checkStateListeners.add(listener);
 349         }
 350
 351         public void removeCheckStateListener(ICheckStateListener listener) {
 352                 checkStateListeners.remove(listener);
 353         }
 354
 355         public void refreshChecked() {
 356                 Stack<UpdateNode> nodeStack = new Stack<UpdateNode>();
 357                 nodeStack.push((UpdateNode)update.getUpdateTree().getRootNode());
 358                 while (!nodeStack.isEmpty()) {
 359                         UpdateNode n = nodeStack.pop();
 360                         if (n.getOp() != null) {
 361                                 UpdateOp op = n.getOp();
 362                                 if (!op.isChange()) {
 363                                         changeBrowser.setGrayed(n, true);
 364                                         changeBrowser.setChecked(n, true);
 365                                 } else {
 366                                         boolean applied = op.applied();
 367                                         if (applied) {
 368                                                 changeBrowser.setChecked(n, true);
 369                                                 changeBrowser.setGrayed(n, true);
 370                                                 selectedStructure.remove(n);
 371                                         } else {
 372                                                 boolean sel = op.selected();
 373                                                 if (sel) {
 374                                                         selectedStructure.add(n);
 375
 376                                                 } else {
 377                                                         selectedStructure.remove(n);
 378                                                 }
 379                                                 changeBrowser.setChecked(n, sel);
 380                                                 changeBrowser.setGrayed(n, !op.enabled());
 381                                         }
 382                                 }
 383                         } else {
 384                                 changeBrowser.setGrayed(n, true);
 385                                 changeBrowser.setChecked(n, true);
 386                         }
 387                         for (UpdateNode c : n.getChildren()) {
 388                                 nodeStack.add((UpdateNode)c);
 389                         }
 390                 }
 391
 392                 changeBrowser.refresh();
 393                 for (ICheckStateListener l : checkStateListeners) {
 394                         l.checkStateChanged(new CheckStateChangedEvent(changeBrowser, null, false));
 395                 }
 396                 changeViewer.refresh();
 397         }
 398
 399         protected abstract ModelUpdate createUpdate();
 400
 401
 402
 403         public void load(UpdateEditorInput uei) {
 404
 405                 Resource oldModel = uei.getR1(); // old model that is being updated, contains user made changes
 406                 Resource newModel = uei.getR2(); // new model,
 407                 Resource originalModel = uei.getR3(); // original old model without user made changes
 408                 boolean newDistinct = uei.isNewDistinct();
 409                 try {
 410                         if (update != null)
 411                                 update.removeListener(this);
 412                         update = createUpdate();
 413                         update.addListener(this);
 414                         update.setInput(oldModel, newModel, originalModel, newDistinct);
 415                 } catch (DatabaseException e) {
 416                         Text text = new Text(this, SWT.MULTI);
 417                         text.setText(e.getMessage());
 418                         e.printStackTrace();
 419                         return;
 420                 }
 421
 422                 setInputs();
 423
 424                 refreshChecked();
 425         }
 426
 427         protected void setInputs() {
 428                 changeViewer.setInput(update.getUpdateList().getChanges());
 429                 changeBrowser.setInput(update.getUpdateTree());
 430         }
 431
 432         private void applyAll() {
 433                 updateAllButton.setEnabled(false);
 434                 updateSelectedButton.setEnabled(false);
 435                 getSession().asyncRequest(new WriteRequest(){
 436                         @Override
 437                         public void perform(WriteGraph graph) throws DatabaseException {
 438                                 update.applyAll(graph);
 439
 440                                 Display.getDefault().asyncExec(new Runnable() {
 441
 442                                         @Override
 443                                         public void run() {
 444
 445                                                 updateAllButton.setEnabled(true);
 446                                                 updateSelectedButton.setEnabled(true);
 447                                                 refreshChecked();
 448                                                 changeViewer.refresh();
 449                                         }
 450                                 });
 451                         }
 452
 453
 454                 }, e -> {
 455                         if (e != null)
 456                                 ExceptionUtils.logAndShowError("Cannot update model", e);
 457                 });
 458         }
 459
 460         private void applySelected() {
 461                 updateAllButton.setEnabled(false);
 462                 updateSelectedButton.setEnabled(false);
 463                 getSession().asyncRequest(new WriteRequest(){
 464                         @Override
 465                         public void perform(WriteGraph graph) throws DatabaseException {
 466                                 update.applySelected(graph);
 467
 468                                 Display.getDefault().asyncExec(new Runnable() {
 469
 470                                         @Override
 471                                         public void run() {
 472                                                 changeViewer.refresh();
 473                                                 updateAllButton.setEnabled(true);
 474                                                 updateSelectedButton.setEnabled(true);
 475                                                 refreshChecked();
 476                                         }
 477                                 });
 478                         }
 479                 });
 480         }
 481
 482         private class ModificationListContentProvider implements IStructuredContentProvider {
 483
 484                 @SuppressWarnings("unchecked")
 485                 @Override
 486                 public Object[] getElements(Object inputElement) {
 487                         if (inputElement == null)
 488                                 return null;
 489                         Collection<Pair<Statement, Statement>> coll = (Collection<Pair<Statement, Statement>>)inputElement;
 490                         return coll.toArray();
 491                 }
 492
 493                 @Override
 494                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 495
 496                 }
 497
 498                 @Override
 499                 public void dispose() {
 500
 501                 }
 502         }
 503
 504         private class UpdateTreeContentProvider implements ITreeContentProvider {
 505                 @Override
 506                 public Object[] getElements(Object inputElement) {
 507                         if (inputElement instanceof UpdateTree)
 508                                 return new Object[]{((UpdateTree)inputElement).getRootNode()};
 509                         if (inputElement instanceof UpdateNode) {
 510                                 UpdateNode node = (UpdateNode)inputElement;
 511                                 return node.getChildren().toArray();
 512                         }
 513                         return new Object[0];
 514                 }
 515
 516                 @Override
 517                 public Object getParent(Object element) {
 518                         return null;
 519                 }
 520
 521                 @Override
 522                 public Object[] getChildren(Object parentElement) {
 523                         UpdateNode node = (UpdateNode)parentElement;
 524                         return node.getChildren().toArray();
 525                 }
 526
 527                 @Override
 528                 public boolean hasChildren(Object element) {
 529                         UpdateNode node = (UpdateNode)element;
 530                         return node.getChildren().size() > 0;
 531                 }
 532
 533                 @Override
 534                 public void dispose() {
 535
 536                 }
 537
 538                 @Override
 539                 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 540
 541                 }
 542         }
 543
 544         private class SelectionLabelProvider extends ColumnLabelProvider {
 545
 546                 public SelectionLabelProvider() {
 547
 548                 }
 549                 @Override
 550                 public String getText(Object element) {
 551                         return "";
 552                 }
 553
 554                 @Override
 555                 public Image getImage(Object element) {
 556                         if (update == null || !update.isInit())
 557                                 return null;
 558                         PropertyChange pc = (PropertyChange)element;
 559                         if (pc.selected())
 560                                 return checked;
 561                         else
 562                                 return unchecked;
 563                 }
 564
 565                 @Override
 566                 public Color getForeground(Object element) {
 567                         PropertyChange pc = (PropertyChange)element;
 568                         if (!pc.enabled())
 569                                 return disabledColor;
 570                         return null;
 571                 }
 572         }
 573
 574         protected abstract class PropertyChangeLabelProvider extends ColumnLabelProvider {
 575
 576                 public PropertyChangeLabelProvider() {
 577
 578                 }
 579
 580                 @Override
 581                 public Color getForeground(Object element) {
 582                         PropertyChange pc = (PropertyChange)element;
 583                         if (!pc.enabled())
 584                                 return disabledColor;
 585                         return null;
 586                 }
 587         }
 588
 589         private class UpdateNodeLabelProvider extends ColumnLabelProvider {
 590
 591                 @Override
 592                 public String getText(Object element) {
 593                         final UpdateNode node = (UpdateNode)element;
 594                         return node.getLabel();
 595                 }
 596
 597                 @Override
 598                 public Image getImage(Object element) {
 599                         final UpdateNode node = (UpdateNode)element;
 600                         try  {
 601                                 ImageDescriptor id = getSession().syncRequest(new Read<ImageDescriptor>() {
 602                                         @Override
 603                                         public ImageDescriptor perform(ReadGraph graph) throws DatabaseException {
 604                                                 return node.getImage(graph);
 605                                         }
 606                                 });
 607                                 return manager.createImage(id);
 608                         } catch (Exception e) {
 609                                 return null;
 610                         }
 611                 }
 612
 613                 @Override
 614                 public String getToolTipText(Object element) {
 615                         final UpdateNode node = (UpdateNode)element;
 616                         if (node.getOp() != null) {
 617                                 return node.getOp().toString();
 618                         } else {
 619                                 return null;
 620                         }
 621                 }
 622
 623                 @Override
 624                 public int getToolTipDisplayDelayTime(Object object) {
 625                         return 1000;
 626                 }
 627
 628                 @Override
 629                 public int getToolTipTimeDisplayed(Object object) {
 630                         return 10000;
 631                 }
 632
 633                 @Override
 634                 public Color getBackground(Object element) {
 635                         final UpdateNode node = (UpdateNode)element;
 636                         UpdateStatus status = node.getStatus();
 637                         if (status == UpdateStatus.CONTAINS)
 638                                 return containsColor;
 639                         if (status == UpdateStatus.DELETED)
 640                                 return deletedColor;
 641                         if (status == UpdateStatus.NEW)
 642                                 return addedColor;
 643                         return null;
 644                 }
 645
 646                 @Override
 647                 public Color getForeground(Object element) {
 648                         final UpdateNode node = (UpdateNode)element;
 649                         if (node.getOp() != null && !node.getOp().enabled())
 650                                 return disabledColor;
 651                         return null;
 652                 }
 653         }
 654
 655         private class SelectionEditingSupport extends EditingSupport {
 656
 657
 658                 public SelectionEditingSupport(ColumnViewer viewer) {
 659                         super(viewer);
 660                 }
 661
 662                 @Override
 663                 protected boolean canEdit(Object element) {
 664                         return true;
 665                 }
 666
 667                 @Override
 668                 protected CellEditor getCellEditor(Object element) {
 669                         return new CheckboxCellEditor(null, SWT.CHECK);
 670                 }
 671
 672                 @Override
 673                 protected Object getValue(Object element) {
 674                         if (update == null || !update.isInit())
 675                                 return false;
 676                         PropertyChange pc = (PropertyChange)element;
 677                         return pc.selected();
 678                 }
 679
 680                 @Override
 681                 protected void setValue(Object element, Object value) {
 682                         if (update == null || !update.isInit())
 683                                 return;
 684                         PropertyChange pc = (PropertyChange)element;
 685                         if (Boolean.TRUE.equals(value))
 686                                 pc.select(true);
 687                         else
 688                                 pc.select(false);
 689
 690                         getViewer().refresh(element);
 691                 }
 692
 693
 694         }
 695
 696
 697 }