gerrit.simantics Code Review - simantics/platform.git/blob

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt.widgets;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 import java.util.HashSet;\r
  17 import java.util.Map;\r
  18 import java.util.Set;\r
  19 import java.util.function.Consumer;\r
  20 \r
  21 import org.eclipse.core.runtime.IAdaptable;\r
  22 import org.eclipse.core.runtime.Platform;\r
  23 import org.eclipse.jface.action.IMenuManager;\r
  24 import org.eclipse.jface.layout.GridDataFactory;\r
  25 import org.eclipse.jface.layout.GridLayoutFactory;\r
  26 import org.eclipse.jface.layout.TreeColumnLayout;\r
  27 import org.eclipse.jface.resource.JFaceResources;\r
  28 import org.eclipse.jface.resource.LocalResourceManager;\r
  29 import org.eclipse.jface.viewers.ColumnWeightData;\r
  30 import org.eclipse.jface.viewers.ISelectionProvider;\r
  31 import org.eclipse.swt.SWT;\r
  32 import org.eclipse.swt.dnd.DND;\r
  33 import org.eclipse.swt.dnd.DragSource;\r
  34 import org.eclipse.swt.dnd.DragSourceEvent;\r
  35 import org.eclipse.swt.dnd.DragSourceListener;\r
  36 import org.eclipse.swt.dnd.DropTarget;\r
  37 import org.eclipse.swt.dnd.DropTargetEvent;\r
  38 import org.eclipse.swt.dnd.DropTargetListener;\r
  39 import org.eclipse.swt.dnd.FileTransfer;\r
  40 import org.eclipse.swt.dnd.TextTransfer;\r
  41 import org.eclipse.swt.dnd.Transfer;\r
  42 import org.eclipse.swt.widgets.Composite;\r
  43 import org.eclipse.swt.widgets.Control;\r
  44 import org.eclipse.swt.widgets.Event;\r
  45 import org.eclipse.swt.widgets.Listener;\r
  46 import org.eclipse.swt.widgets.Tree;\r
  47 import org.eclipse.swt.widgets.TreeColumn;\r
  48 import org.eclipse.swt.widgets.TreeItem;\r
  49 import org.eclipse.ui.ISelectionListener;\r
  50 import org.eclipse.ui.IWorkbenchSite;\r
  51 import org.eclipse.ui.contexts.IContextService;\r
  52 import org.simantics.browsing.ui.BuiltinKeys;\r
  53 import org.simantics.browsing.ui.Column;\r
  54 import org.simantics.browsing.ui.ExplorerState;\r
  55 import org.simantics.browsing.ui.GraphExplorer;\r
  56 import org.simantics.browsing.ui.GraphExplorer.TransientExplorerState;\r
  57 import org.simantics.browsing.ui.NodeContext;\r
  58 import org.simantics.browsing.ui.StatePersistor;\r
  59 import org.simantics.browsing.ui.common.ColumnKeys;\r
  60 import org.simantics.browsing.ui.common.EvaluatorData;\r
  61 import org.simantics.browsing.ui.common.EvaluatorDataImpl;\r
  62 import org.simantics.browsing.ui.common.processors.ComparableFactoryResolver;\r
  63 import org.simantics.browsing.ui.common.processors.ComparableSelectorQueryProcessor;\r
  64 import org.simantics.browsing.ui.common.processors.FilterSelectionRequestQueryProcessor;\r
  65 import org.simantics.browsing.ui.common.processors.ImageDecoratorFactoryResolver;\r
  66 import org.simantics.browsing.ui.common.processors.ImagerFactoryResolver;\r
  67 import org.simantics.browsing.ui.common.processors.LabelDecoratorFactoryResolver;\r
  68 import org.simantics.browsing.ui.common.processors.LabelerFactoryResolver;\r
  69 import org.simantics.browsing.ui.common.processors.UserSelectedComparableFactoryQueryProcessor;\r
  70 import org.simantics.browsing.ui.common.processors.UserSelectedViewpointFactoryQueryProcessor;\r
  71 import org.simantics.browsing.ui.common.processors.ViewpointFactoryResolver;\r
  72 import org.simantics.browsing.ui.common.views.FilterAreaSource;\r
  73 import org.simantics.browsing.ui.common.views.IFilterArea;\r
  74 import org.simantics.browsing.ui.common.views.IFilterAreaProvider;\r
  75 import org.simantics.browsing.ui.graph.impl.AsyncReadGraphDataSource;\r
  76 import org.simantics.browsing.ui.graph.impl.Evaluators;\r
  77 import org.simantics.browsing.ui.graph.impl.InheritsQueryProcessor;\r
  78 import org.simantics.browsing.ui.graph.impl.ReadGraphDataSource;\r
  79 import org.simantics.browsing.ui.graph.impl.RelatedObjectsQueryProcessor;\r
  80 import org.simantics.browsing.ui.graph.impl.SessionContextInputSource;\r
  81 import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;\r
  82 import org.simantics.browsing.ui.model.nodetypes.NodeType;\r
  83 import org.simantics.browsing.ui.swt.Activator;\r
  84 import org.simantics.browsing.ui.swt.AdaptableHintContext;\r
  85 import org.simantics.browsing.ui.swt.ComparatorSelector;\r
  86 import org.simantics.browsing.ui.swt.ContextMenuInitializer;\r
  87 import org.simantics.browsing.ui.swt.DefaultExplorerSelectionListener;\r
  88 import org.simantics.browsing.ui.swt.DefaultIsCheckedProcessor2;\r
  89 import org.simantics.browsing.ui.swt.DefaultKeyListener;\r
  90 import org.simantics.browsing.ui.swt.DefaultMouseListener;\r
  91 import org.simantics.browsing.ui.swt.DefaultSelectionDataResolver;\r
  92 import org.simantics.browsing.ui.swt.FilterArea;\r
  93 import org.simantics.browsing.ui.swt.GraphExplorerFactory;\r
  94 import org.simantics.browsing.ui.swt.IContextMenuInitializer;\r
  95 import org.simantics.browsing.ui.swt.RootFilterArea;\r
  96 import org.simantics.browsing.ui.swt.StandardContextTypesQueryProcessor;\r
  97 import org.simantics.browsing.ui.swt.TypesQueryProcessor;\r
  98 import org.simantics.browsing.ui.swt.ViewpointSelector;\r
  99 import org.simantics.browsing.ui.swt.widgets.impl.Widget;\r
 100 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;\r
 101 import org.simantics.db.AsyncReadGraph;\r
 102 import org.simantics.db.ReadGraph;\r
 103 import org.simantics.db.Resource;\r
 104 import org.simantics.db.Session;\r
 105 import org.simantics.db.common.request.ResourceRead;\r
 106 import org.simantics.db.common.utils.Logger;\r
 107 import org.simantics.db.exception.DatabaseException;\r
 108 import org.simantics.db.layer0.SelectionHints;\r
 109 import org.simantics.db.layer0.variable.Variable;\r
 110 import org.simantics.db.layer0.variable.Variables;\r
 111 import org.simantics.db.management.ISessionContext;\r
 112 import org.simantics.db.management.ISessionContextChangedListener;\r
 113 import org.simantics.db.management.ISessionContextProvider;\r
 114 import org.simantics.db.management.SessionContextChangedEvent;\r
 115 import org.simantics.project.ProjectKeys;\r
 116 import org.simantics.ui.SimanticsUI;\r
 117 import org.simantics.ui.dnd.LocalObjectTransfer;\r
 118 import org.simantics.ui.dnd.LocalSelectionDragSourceListener;\r
 119 import org.simantics.ui.dnd.NoImageDragSourceEffect;\r
 120 import org.simantics.ui.dnd.SessionContainer;\r
 121 import org.simantics.ui.selection.AnyResource;\r
 122 import org.simantics.ui.selection.AnyVariable;\r
 123 import org.simantics.ui.selection.ExplorerColumnContentType;\r
 124 import org.simantics.ui.selection.ExplorerInputContentType;\r
 125 import org.simantics.ui.selection.WorkbenchSelectionContentType;\r
 126 import org.simantics.ui.selection.WorkbenchSelectionElement;\r
 127 import org.simantics.ui.selection.WorkbenchSelectionUtils;\r
 128 import org.simantics.utils.ObjectUtils;\r
 129 import org.simantics.utils.datastructures.BinaryFunction;\r
 130 import org.simantics.utils.datastructures.Function;\r
 131 import org.simantics.utils.datastructures.disposable.DisposeState;\r
 132 import org.simantics.utils.datastructures.hints.HintListenerAdapter;\r
 133 import org.simantics.utils.datastructures.hints.HintTracker;\r
 134 import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
 135 import org.simantics.utils.datastructures.hints.IHintListener;\r
 136 import org.simantics.utils.datastructures.hints.IHintObservable;\r
 137 import org.simantics.utils.datastructures.hints.IHintTracker;\r
 138 \r
 139 \r
 140 public class GraphExplorerComposite extends Composite implements Widget, IAdaptable {\r
 141 \r
 142     protected UserSelectedComparableFactoryQueryProcessor userSelectedComparableFactoryQueryProcessor;\r
 143     protected UserSelectedViewpointFactoryQueryProcessor  userSelectedViewpointFactoryQueryProcessor;\r
 144     protected FilterSelectionRequestQueryProcessor        filterSelectionRequestQueryProcessor;\r
 145     protected IFilterArea                                 filterArea;\r
 146     protected EvaluatorData                               evaluatorData;\r
 147 \r
 148     protected LocalResourceManager                        resourceManager;\r
 149 \r
 150     protected ISelectionListener                          workbenchSelectionListener;\r
 151 \r
 152     private final int                                     style;\r
 153 \r
 154     final private IWorkbenchSite                          site;\r
 155 \r
 156     protected GraphExplorer                               explorer;\r
 157 \r
 158     protected IMenuManager                                menuManager;\r
 159 \r
 160     private final Map<String, Object>                     args;\r
 161 \r
 162     protected ISessionContextProvider                       contextProvider;\r
 163 \r
 164     private ISessionContext                               sessionContext;\r
 165 \r
 166     private Object                                        dragSource;\r
 167 \r
 168     private IHintTracker                                  sessionContextTracker = new SessionContextProjectTracker();\r
 169 \r
 170     private InputSource                                   inputSource           = new DirectInputSource();\r
 171     private FilterAreaSource                              filterAreaSource    = new SelectionFilterAreaSource();\r
 172 \r
 173     private final TreeColumnLayout                                                        ad;\r
 174     private String[]                                        editingColumn = ColumnKeys.KEYS_SINGLE;\r
 175     \r
 176     private StatePersistor                                                                      persistor = null;\r
 177 \r
 178     private final Composite                                                                       toolComposite;\r
 179     private final Composite                                                                       toolComposite2;\r
 180     private final Composite                                                                       explorerComposite;\r
 181     final private WidgetSupport                                 support;\r
 182     private final boolean                                                                       useNodeBrowseContexts;\r
 183     private final boolean                                                                       useNodeActionContexts;\r
 184 \r
 185     static class SelectionElement extends AdaptableHintContext {\r
 186 \r
 187         final public WorkbenchSelectionElement wse;\r
 188         final public Object content;\r
 189         final public Resource resource;\r
 190         final public Variable variable;\r
 191         final public Object input;\r
 192         final public TransientExplorerState explorerState;\r
 193         \r
 194         private WorkbenchSelectionElement extractWse(Object content) {\r
 195             if(content instanceof NodeContext) {\r
 196                 NodeContext context = (NodeContext)content;\r
 197                 Object input = context.getConstant(NodeType.TYPE);\r
 198                 if(input instanceof NodeType) \r
 199                     return ((NodeType)input).getWorkbenchSelectionElement(context);\r
 200             }\r
 201             return null;\r
 202         }\r
 203         \r
 204         private Resource extractResource(Object content) {\r
 205                 if(content instanceof NodeContext) {\r
 206                         NodeContext context = (NodeContext)content;\r
 207                         Object input = context.getConstant(BuiltinKeys.INPUT);\r
 208                         if(input instanceof Resource) return (Resource)input;\r
 209                         if(input instanceof IAdaptable) {\r
 210                                 Resource var = (Resource)((IAdaptable)input).getAdapter(Resource.class);\r
 211                                 if(var != null) return var;\r
 212                         }\r
 213                 }\r
 214                 return null;\r
 215         }\r
 216         \r
 217         private Variable extractVariable(Object content) {\r
 218                 if(content instanceof NodeContext) {\r
 219                         NodeContext context = (NodeContext)content;\r
 220                         Object input = context.getConstant(BuiltinKeys.INPUT);\r
 221                         if(input instanceof Variable) return (Variable)input;\r
 222                         if(input instanceof IAdaptable) {\r
 223                                 Variable var = (Variable)((IAdaptable)input).getAdapter(Variable.class);\r
 224                                 if(var != null) return var;\r
 225                         }\r
 226                 }\r
 227                 return null;\r
 228         }\r
 229 \r
 230         private Object extractInput(Object content) {\r
 231                 if(content instanceof NodeContext) {\r
 232                         NodeContext context = (NodeContext)content;\r
 233                         return context.getConstant(BuiltinKeys.INPUT);\r
 234                 }\r
 235                 return null;\r
 236         }\r
 237 \r
 238         public SelectionElement(GraphExplorer explorer, Key[] keys, Object content) {\r
 239             super(keys);\r
 240             this.content = content;\r
 241             this.wse = extractWse(content);\r
 242             this.resource = extractResource(content);\r
 243             this.variable = extractVariable(content);\r
 244             this.input = extractInput(content);\r
 245             this.explorerState = explorer.getTransientState();\r
 246         }\r
 247 \r
 248         @SuppressWarnings("unchecked")\r
 249         @Override\r
 250         public <T> T getContent(WorkbenchSelectionContentType<T> contentType) {\r
 251 \r
 252             if(wse != null) {\r
 253                 T result = wse.getContent(contentType);\r
 254                 if(result != null) return result;\r
 255             }\r
 256             \r
 257             if(contentType instanceof AnyResource) return (T)resource;\r
 258             else if(contentType instanceof AnyVariable) {\r
 259                 AnyVariable type = (AnyVariable)contentType;\r
 260                 try {\r
 261                         \r
 262                         if(variable != null) return (T)variable;\r
 263                         \r
 264                         if(resource == null) return null;\r
 265                         \r
 266                     return (T) type.processor.sync(new ResourceRead<Variable>(resource) {\r
 267                         @Override\r
 268                         public Variable perform(ReadGraph graph) throws DatabaseException {\r
 269                             return Variables.getPossibleVariable(graph, resource);\r
 270                         }\r
 271                         \r
 272                     });\r
 273                 } catch (DatabaseException e) {\r
 274                     Logger.defaultLogError(e);\r
 275                 }\r
 276             } else if (contentType instanceof ExplorerInputContentType) {\r
 277                 return (T)input;\r
 278             } else if (contentType instanceof ExplorerColumnContentType) {\r
 279                 return (T)explorerState.getActiveColumn();\r
 280             }\r
 281             return null;\r
 282         }\r
 283         \r
 284         @SuppressWarnings("rawtypes")\r
 285         @Override\r
 286         public Object getAdapter(Class adapter) {\r
 287                 if(WorkbenchSelectionElement.class == adapter) {\r
 288                         return wse;\r
 289                 }\r
 290                 if(NodeContext.class == adapter) {\r
 291                     if(content instanceof NodeContext)\r
 292                         return (NodeContext)content;\r
 293                     else\r
 294                         return null;\r
 295                 }\r
 296                 return super.getAdapter(adapter);\r
 297         }\r
 298 \r
 299     }\r
 300     private BinaryFunction<Object[], GraphExplorer, Object[]> selectionTransformation = new BinaryFunction<Object[], GraphExplorer, Object[]>() {\r
 301 \r
 302         private Key[] KEYS = new Key[] { SelectionHints.KEY_MAIN };\r
 303         \r
 304         @Override\r
 305         public Object[] call(GraphExplorer explorer, Object[] objects) {\r
 306             Object[] result = new Object[objects.length];\r
 307             for (int i = 0; i < objects.length; i++) {\r
 308                 SelectionElement context = new SelectionElement(explorer, KEYS, objects[i]);\r
 309                 context.setHint(SelectionHints.KEY_MAIN, objects[i]);\r
 310                 result[i] = context;\r
 311             }\r
 312             return result;\r
 313         }\r
 314 \r
 315     };\r
 316 \r
 317     private Set<String>                                   browseContexts        = null;\r
 318 \r
 319     private DisposeState                                  disposeState          = DisposeState.Alive;\r
 320 \r
 321     private boolean                                       created               = false;\r
 322 \r
 323     protected String                                      contextMenuId         = null;\r
 324 \r
 325     protected Set<String>                                 uiContext             = null;\r
 326 \r
 327     protected ISessionContextChangedListener              contextChangeListener = new ISessionContextChangedListener() {\r
 328         @Override\r
 329         public void sessionContextChanged(SessionContextChangedEvent event) {\r
 330             sessionContext = event.getNewValue();\r
 331             sessionContextTracker.track(sessionContext);\r
 332         }\r
 333     };\r
 334 \r
 335     public GraphExplorerComposite(Map<String, Object> args, IWorkbenchSite site, Composite parent, WidgetSupport support, int style) {\r
 336 \r
 337         super(parent, SWT.NONE);\r
 338 \r
 339         if (args == null)\r
 340             args = Collections.emptyMap();\r
 341 \r
 342         this.args = args;\r
 343         this.site = site;\r
 344         this.style = style;\r
 345         this.resourceManager = new LocalResourceManager(JFaceResources.getResources(parent.getDisplay()), this);\r
 346 \r
 347         contextProvider = getSessionContextProvider(site);\r
 348 \r
 349         Integer maxChildren = (Integer)args.get("maxChildren");\r
 350 \r
 351         GridLayoutFactory.fillDefaults().equalWidth(false).numColumns(1).margins(0,0).spacing(0,0).applyTo(this);\r
 352 \r
 353         toolComposite = new Composite(this, SWT.NONE);\r
 354 //        toolComposite.setBackground(toolComposite.getDisplay().getSystemColor(SWT.COLOR_DARK_YELLOW));\r
 355 //        GridDataFactory.fillDefaults().grab(true, false).minSize(1, 1).applyTo(toolComposite);\r
 356         GridDataFactory.fillDefaults().grab(true, false).applyTo(toolComposite);\r
 357         GridLayoutFactory.fillDefaults().applyTo(toolComposite);\r
 358 \r
 359         ad = new TreeColumnLayout();\r
 360         explorerComposite = new Composite(this, SWT.NONE);\r
 361         explorerComposite.setLayout(ad);\r
 362         GridDataFactory.fillDefaults().grab(true, true).minSize(1, 50).applyTo(explorerComposite);\r
 363 \r
 364         if (args.containsKey("treeView") && Boolean.TRUE.equals(args.get("treeView"))) {\r
 365                 explorer = createExplorerControl2(explorerComposite, maxChildren);\r
 366         } else {\r
 367                 explorer = createExplorerControl(explorerComposite, maxChildren);\r
 368         }\r
 369         \r
 370         if (args.containsKey("useNodeBrowseContexts") && Boolean.TRUE.equals(args.get("useNodeBrowseContexts"))) {\r
 371                 useNodeBrowseContexts = true;\r
 372         } else {\r
 373                 useNodeBrowseContexts = false;\r
 374         }\r
 375         \r
 376         if (args.containsKey("useNodeActionContexts") && Boolean.TRUE.equals(args.get("useNodeActionContexts"))) {\r
 377                 useNodeActionContexts = true;\r
 378         } else {\r
 379                 useNodeActionContexts = false;\r
 380         }\r
 381         \r
 382         toolComposite2 = new Composite(this, SWT.NONE);\r
 383 //        toolComposite2.setBackground(toolComposite2.getDisplay().getSystemColor(SWT.COLOR_DARK_YELLOW));\r
 384 //        GridDataFactory.fillDefaults().grab(true, false).minSize(1, 1).applyTo(toolComposite);\r
 385         GridDataFactory.fillDefaults().grab(true, false).applyTo(toolComposite2);\r
 386         GridLayoutFactory.fillDefaults().applyTo(toolComposite2);\r
 387 \r
 388         this.support = support;\r
 389 \r
 390         if (support != null)\r
 391             support.register(this);\r
 392 \r
 393     }\r
 394 \r
 395     public GraphExplorerComposite(Map<String, Object> args, IWorkbenchSite site, Composite parent, int style) {\r
 396 \r
 397         this(args, site, parent, null, style);\r
 398 \r
 399     }\r
 400 \r
 401     public ISessionContextProvider getSessionContextProvider(IWorkbenchSite site) {\r
 402         if(site != null)\r
 403             return SimanticsUI.getSessionContextProvider(site.getWorkbenchWindow());\r
 404         else\r
 405             return SimanticsUI.getSessionContextProvider();\r
 406     }\r
 407 \r
 408     public GraphExplorer getExplorer() {\r
 409         return explorer;\r
 410     }\r
 411 \r
 412     public Composite getExplorerComposite() {\r
 413         return explorerComposite;\r
 414     }\r
 415 \r
 416     public <T> T getExplorerControl() {\r
 417         return explorer.getControl();\r
 418     }\r
 419 \r
 420     public void addListenerToControl(int eventType, Listener listener) {\r
 421         ((Tree)explorer.getControl()).addListener(eventType, listener);\r
 422     }\r
 423 \r
 424     public void finish() {\r
 425         created = true;\r
 426         createControls(site);\r
 427         attachToSession();\r
 428     }\r
 429 \r
 430     IWorkbenchSite getSite() {\r
 431         return site;\r
 432     }\r
 433 \r
 434     protected void activateUiContexts() {\r
 435         Collection<String> contexts = getUiContexts();\r
 436         if (contexts == null || contexts.isEmpty())\r
 437             return;\r
 438         IWorkbenchSite site = getSite();\r
 439         if (site != null) {\r
 440             IContextService cs = (IContextService) getSite().getService(IContextService.class);\r
 441             for (String context : contexts)\r
 442                 cs.activateContext(context);\r
 443         }\r
 444     }\r
 445 \r
 446     protected void createControls(IWorkbenchSite site) {\r
 447 \r
 448         // Initialize explorer control.\r
 449 //        GridDataFactory.fillDefaults().grab(true, true).applyTo(explorer.getControl());\r
 450 \r
 451         Control control = explorer.getControl();\r
 452 \r
 453         // Initialize context menu if an initializer is provided.\r
 454         IContextMenuInitializer cmi = getContextMenuInitializer();\r
 455         if (cmi != null) {\r
 456             ISelectionProvider selectionProvider = (ISelectionProvider)explorer.getAdapter(ISelectionProvider.class);\r
 457             menuManager = cmi.createContextMenu(control, selectionProvider, site);\r
 458         }\r
 459 \r
 460         // Initialize UI contexts\r
 461         activateUiContexts();\r
 462 \r
 463         // Initialize DND.\r
 464         dragSource = setupDND(explorer);\r
 465 \r
 466         // Listeners are only added once per listener, not every time the\r
 467         // session context changes.\r
 468         addListeners(explorer, menuManager);\r
 469 \r
 470         userSelectedComparableFactoryQueryProcessor = new UserSelectedComparableFactoryQueryProcessor();\r
 471         userSelectedViewpointFactoryQueryProcessor = new UserSelectedViewpointFactoryQueryProcessor();\r
 472         filterSelectionRequestQueryProcessor = new FilterSelectionRequestQueryProcessor();\r
 473         \r
 474         explorer.setPrimitiveProcessor(filterSelectionRequestQueryProcessor);\r
 475 \r
 476         boolean hasExtraControls = false;\r
 477         boolean hasExtraControls2 = false;\r
 478 \r
 479         Boolean displaySelectors = (Boolean)args.get("displaySelectors");\r
 480         if(displaySelectors == null || displaySelectors == true) {\r
 481 \r
 482             @SuppressWarnings("unused")\r
 483             ComparatorSelector comparatorSelector = new ComparatorSelector(explorer, userSelectedComparableFactoryQueryProcessor, toolComposite, SWT.READ_ONLY);\r
 484 //            comparatorSelector.moveAbove(control);\r
 485 \r
 486             @SuppressWarnings("unused")\r
 487             ViewpointSelector viewpointSelector = new ViewpointSelector(explorer, userSelectedViewpointFactoryQueryProcessor, toolComposite, SWT.READ_ONLY);\r
 488 //            viewpointSelector.moveAbove(control);\r
 489 \r
 490             hasExtraControls = true;\r
 491 \r
 492         }\r
 493 \r
 494         Boolean displayFilter = (Boolean)args.get("displayFilter");\r
 495         if(displayFilter == null || displayFilter == true) {\r
 496 \r
 497                 \r
 498                 filterArea = filterAreaSource.getFilterArea(toolComposite, explorer);\r
 499 //            filterArea = new FilterArea(explorer, filterSelectionRequestQueryProcessor, toolComposite, SWT.READ_ONLY);\r
 500             //filterArea.moveAbove(control);\r
 501 \r
 502             hasExtraControls = true;\r
 503 \r
 504         }\r
 505 \r
 506         Boolean displayFilter2 = (Boolean)args.get("displayFilter2");\r
 507         if(displayFilter2 != null && displayFilter2 == true) {\r
 508 \r
 509                 filterArea = filterAreaSource.getFilterArea(toolComposite2, explorer);\r
 510 //            filterArea = new FilterArea(explorer, filterSelectionRequestQueryProcessor, toolComposite2, SWT.READ_ONLY);\r
 511 //            //filterArea.moveAbove(control);\r
 512 \r
 513             hasExtraControls2 = true;\r
 514 \r
 515         }\r
 516 \r
 517 //        filterArea = new FilterArea(explorer, filterSelectionRequestQueryProcessor, this, SWT.READ_ONLY);\r
 518 //        filterArea.moveAbove(control);\r
 519 \r
 520         if(!hasExtraControls)\r
 521             GridDataFactory.fillDefaults().grab(true, false).minSize(0, 0).hint(0, 0).applyTo(toolComposite);\r
 522         if(!hasExtraControls2)\r
 523             GridDataFactory.fillDefaults().grab(true, false).minSize(0, 0).hint(0, 0).applyTo(toolComposite2);\r
 524 \r
 525         GridDataFactory.fillDefaults().grab(true, true).span(2,1).applyTo(control);\r
 526 \r
 527         //tree.getTree().setLayout(new FillLayout()\r
 528         //this.setLayout(LayoutUtils.createNoBorderGridLayout(2, false));\r
 529 \r
 530         DropTarget target = new DropTarget(control, DND.DROP_COPY | DND.DROP_LINK);\r
 531         target.setTransfer(getAcceptedDataTypes());\r
 532         target.addDropListener(new DropTargetListener() {\r
 533 \r
 534             Tree tree = (Tree)explorer.getControl();\r
 535 \r
 536             @Override\r
 537             public void dragEnter(DropTargetEvent event) {\r
 538                 event.detail = DND.DROP_COPY;\r
 539             }\r
 540 \r
 541             @Override\r
 542             public void dragLeave(DropTargetEvent event) {\r
 543             }\r
 544 \r
 545             @Override\r
 546             public void dragOperationChanged(DropTargetEvent event) {\r
 547             }\r
 548 \r
 549             @Override\r
 550             public void dragOver(DropTargetEvent event) {\r
 551             }\r
 552 \r
 553             @Override\r
 554             public void drop(DropTargetEvent event) {\r
 555                 TreeItem item = tree.getItem(tree.toControl(event.x, event.y));\r
 556                 if(item != null) {\r
 557                         Object data = item.getData();\r
 558                         if (data instanceof NodeContext)\r
 559                                 handleDrop(event.data, (NodeContext) data);\r
 560                         else if (data instanceof IAdaptable) {\r
 561                                 IAdaptable a = (IAdaptable) data;\r
 562                                 handleDrop(event.data, (NodeContext) a.getAdapter(NodeContext.class));\r
 563                         }\r
 564                 } else\r
 565                     handleDrop(event.data, null);\r
 566             }\r
 567 \r
 568             @Override\r
 569             public void dropAccept(DropTargetEvent event) {\r
 570             }\r
 571 \r
 572         });\r
 573 \r
 574         // Add workbench listeners and make sure they are cleaned up\r
 575         setWorkbenchListeners();\r
 576         control.addListener(SWT.Dispose, new Listener() {\r
 577             @Override\r
 578             public void handleEvent(Event event) {\r
 579                 doDispose();\r
 580             }\r
 581         });\r
 582     }\r
 583 \r
 584     @SuppressWarnings({ "rawtypes", "unchecked" })\r
 585     @Override\r
 586     public Object getAdapter(Class adapter) {\r
 587         if (GraphExplorer.class == adapter)\r
 588             return explorer;\r
 589         if (EvaluatorData.class == adapter)\r
 590             return evaluatorData;\r
 591         if (BrowseContext.class == adapter) {\r
 592             EvaluatorData ed = evaluatorData;\r
 593             return ed != null ? ed.getBrowseContext() : null;\r
 594         }\r
 595         if (adapter == IFilterAreaProvider.class)\r
 596             return filterArea;\r
 597         return explorer.getAdapter(adapter);\r
 598     }\r
 599 \r
 600     protected void doDispose() {\r
 601         //System.out.println(this + ".GraphExplorerComposite.doDispose()");\r
 602         removeWorkbenchListeners();\r
 603         userSelectedComparableFactoryQueryProcessor = null;\r
 604         userSelectedViewpointFactoryQueryProcessor = null;\r
 605         filterSelectionRequestQueryProcessor = null;\r
 606 \r
 607         disposeState = DisposeState.Disposing;\r
 608         try {\r
 609             //System.out.println(this + ".GraphExplorerViewBase.dispose()");\r
 610             if (contextProvider != null) {\r
 611                 contextProvider.removeContextChangedListener(contextChangeListener);\r
 612                 contextProvider = null;\r
 613             }\r
 614             sessionContextTracker.untrack();\r
 615             resourceManager = null;\r
 616             explorer = null;\r
 617             sessionContext = null;\r
 618             dragSource = null;\r
 619 //            parent = null;\r
 620         } finally {\r
 621             disposeState = DisposeState.Disposed;\r
 622         }\r
 623     }\r
 624 \r
 625     @Override\r
 626     public void dispose() {\r
 627         doDispose();\r
 628         super.dispose();\r
 629     }\r
 630 \r
 631     protected StatePersistor getStatePersistor() {\r
 632         return persistor;\r
 633     }\r
 634     \r
 635     public void setStatePersistor(StatePersistor persistor) {\r
 636         this.persistor = persistor;\r
 637     }\r
 638     \r
 639     protected void initializeExplorer(GraphExplorer explorer, ISessionContext context) {\r
 640 \r
 641         if(explorer == null || explorer.isDisposed()) return;\r
 642         if(context == null) return;\r
 643         if(browseContexts == null) return;\r
 644 \r
 645         Session session = context != null ? context.getSession() : null;\r
 646         setupDragSource(session);\r
 647 \r
 648         if (session != null) {\r
 649             evaluatorData = createEvaluatorData(session);\r
 650             explorer.setDataSource(new AsyncReadGraphDataSource(session));\r
 651             explorer.setDataSource(new ReadGraphDataSource(session));\r
 652         }\r
 653         else {\r
 654             evaluatorData = new EvaluatorDataImpl();\r
 655             explorer.removeDataSource(AsyncReadGraph.class);\r
 656             explorer.removeDataSource(ReadGraph.class);\r
 657         }\r
 658 \r
 659         explorer.setPersistor(getStatePersistor());\r
 660         \r
 661         explorer.setProcessor(new ComparableFactoryResolver(evaluatorData));\r
 662         explorer.setProcessor(new ViewpointFactoryResolver(evaluatorData));\r
 663         explorer.setProcessor(new LabelerFactoryResolver(evaluatorData));\r
 664         explorer.setProcessor(new ImagerFactoryResolver(evaluatorData));\r
 665         explorer.setProcessor(new LabelDecoratorFactoryResolver(evaluatorData));\r
 666         explorer.setProcessor(new ImageDecoratorFactoryResolver(evaluatorData));\r
 667         explorer.setProcessor(new DefaultIsCheckedProcessor2(evaluatorData));\r
 668         explorer.setPrimitiveProcessor(new TypesQueryProcessor());\r
 669         explorer.setPrimitiveProcessor(new StandardContextTypesQueryProcessor());\r
 670         explorer.setPrimitiveProcessor(new InheritsQueryProcessor());\r
 671         explorer.setPrimitiveProcessor(new RelatedObjectsQueryProcessor());\r
 672 \r
 673         explorer.setPrimitiveProcessor(userSelectedViewpointFactoryQueryProcessor);\r
 674         explorer.setProcessor(new ComparableSelectorQueryProcessor());\r
 675         explorer.setPrimitiveProcessor(userSelectedComparableFactoryQueryProcessor);\r
 676         explorer.setPrimitiveProcessor(filterSelectionRequestQueryProcessor);\r
 677 \r
 678         initializeExplorerWithEvaluator(explorer, context, evaluatorData);\r
 679     }\r
 680 \r
 681     protected void initializeExplorerWithEvaluator(GraphExplorer explorer, ISessionContext context, EvaluatorData data) {\r
 682     }\r
 683 \r
 684     protected EvaluatorData createEvaluatorData(Session context) {\r
 685 \r
 686 //        Set<String> browseContexts = getArgument("browseContexts");\r
 687 \r
 688         return Evaluators.load(context.getSession(), browseContexts, resourceManager, useNodeBrowseContexts, useNodeActionContexts);\r
 689 \r
 690     }\r
 691 \r
 692     protected Transfer[] getAcceptedDataTypes() {\r
 693         return new Transfer[] {  LocalObjectTransfer.getTransfer(), FileTransfer.getInstance() };\r
 694     }\r
 695 \r
 696     protected void handleDrop(Object data, NodeContext target) {\r
 697     }\r
 698 \r
 699     DragSourceListenerFactory dragSourceListenerFactory = new DragSourceListenerFactory() {\r
 700 \r
 701         final Transfer[] transfers = new Transfer[] {LocalObjectTransfer.getTransfer(), TextTransfer.getInstance() };\r
 702 \r
 703         @Override\r
 704         public DragSourceListener get(ISelectionProvider selectionProvider) {\r
 705 \r
 706                 LocalSelectionDragSourceListener ls = new LocalSelectionDragSourceListener(selectionProvider);\r
 707 \r
 708                 return new DragSourceListener() {\r
 709                                 \r
 710                                 @Override\r
 711                                 public void dragStart(DragSourceEvent event) {\r
 712                                         ls.dragStart(event);\r
 713                                 }\r
 714                                 \r
 715                                 @Override\r
 716                                 public void dragSetData(DragSourceEvent event) {\r
 717                                         if(TextTransfer.getInstance().isSupportedType(event.dataType)) {\r
 718                                         try {\r
 719                                                         event.data = WorkbenchSelectionUtils.getPossibleJSON(selectionProvider.getSelection());\r
 720                                                 } catch (DatabaseException e) {\r
 721                                                         event.data = "{ type:\"Exception\" }";\r
 722                                                         Logger.defaultLogError(e);\r
 723                                                 }\r
 724                                         } else if (LocalObjectTransfer.getTransfer().isSupportedType(event.dataType)) {\r
 725                                                 ls.dragSetData(event);\r
 726                                         }\r
 727                                 }\r
 728                                 \r
 729                                 @Override\r
 730                                 public void dragFinished(DragSourceEvent event) {\r
 731                                         ls.dragFinished(event);\r
 732                                 }\r
 733                         };\r
 734         }\r
 735 \r
 736         @Override\r
 737         public Transfer[] getTransfers() {\r
 738             return transfers;\r
 739         }\r
 740 \r
 741     };\r
 742 \r
 743     public void setDragSourceListenerFactory(DragSourceListenerFactory dragSourceListenerFactory) {\r
 744         this.dragSourceListenerFactory = dragSourceListenerFactory;\r
 745     }\r
 746 \r
 747     protected DragSourceListener setupDND(GraphExplorer explorer) {\r
 748 \r
 749         ISelectionProvider selectionProvider = (ISelectionProvider)explorer.getAdapter(ISelectionProvider.class);\r
 750 \r
 751         DragSourceListener listener = createDragSourceListener(selectionProvider);\r
 752 \r
 753         Control control = explorer.getControl();\r
 754         DragSource source = createDragSource(control);\r
 755         source.setTransfer(getTransfers());\r
 756         source.addDragListener(listener);\r
 757         source.setDragSourceEffect(new NoImageDragSourceEffect(control));\r
 758 \r
 759         return listener;\r
 760 \r
 761     }\r
 762 \r
 763     protected DragSourceListener createDragSourceListener(ISelectionProvider selectionProvider) {\r
 764         return dragSourceListenerFactory.get(selectionProvider);\r
 765     }\r
 766 \r
 767     private int dragStyle = DND.DROP_LINK | DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT;\r
 768 \r
 769     protected void setDragStyle(int style) {\r
 770         this.dragStyle = style;\r
 771     }\r
 772 \r
 773     protected int getDragStyle() {\r
 774         return dragStyle;\r
 775     }\r
 776 \r
 777     protected DragSource createDragSource(Control control) {\r
 778         return new DragSource(control, getDragStyle());\r
 779     }\r
 780 \r
 781     protected Transfer[] getTransfers() {\r
 782         return dragSourceListenerFactory.getTransfers();\r
 783     }\r
 784 \r
 785     public EvaluatorData getEvaluatorData() {\r
 786         return evaluatorData;\r
 787     }\r
 788 \r
 789     public interface InputSource {\r
 790         /**\r
 791          * @param ctx the session context to read the input from. May be\r
 792          *        <code>null</code> if there is no session.\r
 793          * @return the input object of a graph explorer. To indicate no input,\r
 794          *         use {@link GraphExplorerConstants#EMPTY_INPUT}. Never return\r
 795          *         <code>null</code>.\r
 796          */\r
 797         Object get(ISessionContext ctx, Object selection);\r
 798     }\r
 799     \r
 800     public interface FilterSource {\r
 801         \r
 802         \r
 803         \r
 804     }\r
 805 \r
 806     /**\r
 807      * The default hint tracker that will be active if\r
 808      * {@link GraphExplorerComposite#setSessionContextTracker(IHintTracker) is\r
 809      * not called.\r
 810      */\r
 811     public class SessionContextProjectTracker extends HintTracker {\r
 812         public SessionContextProjectTracker() {\r
 813             IHintListener activeProjectListener = new HintListenerAdapter() {\r
 814                 @Override\r
 815                 public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {\r
 816                     applySessionContext(getSessionContext());\r
 817                 }\r
 818             };\r
 819             addKeyHintListener(ProjectKeys.KEY_PROJECT, activeProjectListener);\r
 820         }\r
 821     }\r
 822 \r
 823     public class DirectInputSource implements InputSource {\r
 824         @Override\r
 825         public Object get(ISessionContext ctx, Object selection) {\r
 826             return selection;\r
 827         }\r
 828     }\r
 829     \r
 830     public static class SelectionFilterAreaSource implements FilterAreaSource {\r
 831 \r
 832                 @Override\r
 833                 public IFilterArea getFilterArea(Composite parent, GraphExplorer explorer) {\r
 834                         FilterSelectionRequestQueryProcessor processor = (FilterSelectionRequestQueryProcessor)explorer.getPrimitiveProcessor(BuiltinKeys.SELECTION_REQUESTS);\r
 835                         return new FilterArea(explorer, processor, parent, SWT.READ_ONLY);\r
 836                 }\r
 837         \r
 838     }\r
 839 \r
 840     public static class RootFilterAreaSource implements FilterAreaSource {\r
 841 \r
 842                 @Override\r
 843                 public IFilterArea getFilterArea(Composite parent, GraphExplorer explorer) {\r
 844                         FilterSelectionRequestQueryProcessor processor = (FilterSelectionRequestQueryProcessor)explorer.getPrimitiveProcessor(BuiltinKeys.SELECTION_REQUESTS);\r
 845                         return new RootFilterArea(explorer, processor, parent, SWT.READ_ONLY);\r
 846                 }\r
 847         \r
 848     }\r
 849 \r
 850     protected void setSessionContextTracker(IHintTracker tracker) {\r
 851         this.sessionContextTracker = tracker;\r
 852     }\r
 853 \r
 854     public void setInputSource(InputSource source) {\r
 855         this.inputSource = source;\r
 856     }\r
 857     \r
 858     public void setFilterAreaSource(FilterAreaSource provider) {\r
 859         this.filterAreaSource = provider;\r
 860     }\r
 861 \r
 862     public void setSelectionTransformation(BinaryFunction<Object[], GraphExplorer, Object[]> transformation) {\r
 863         this.selectionTransformation = transformation;\r
 864         if(explorer != null) explorer.setSelectionTransformation(transformation);\r
 865     }\r
 866 \r
 867     protected Set<String> getBrowseContexts() {\r
 868         return browseContexts;\r
 869     }\r
 870     \r
 871     public void setBrowseContexts(Set<String> contexts) {\r
 872         this.browseContexts = contexts;\r
 873         //initializeExplorer(explorer, getSessionContext());\r
 874     }\r
 875 \r
 876     public void setBrowseContexts(String ... contexts) {\r
 877         this.browseContexts = new HashSet<String>();\r
 878         for(String s : contexts) this.browseContexts.add(s);\r
 879         initializeExplorer(explorer, getSessionContext());\r
 880     }\r
 881 \r
 882     public void setContextMenuId(String contextMenuId) {\r
 883         this.contextMenuId = contextMenuId;\r
 884     }\r
 885 \r
 886 //    protected IContextMenuInitializer getContextMenuInitializer() {\r
 887 //        String contextMenuId = getContextMenuId();\r
 888 //        if(contextMenuId != null) {\r
 889 //            return new ContextMenuInitializer(contextMenuId);\r
 890 //        } else {\r
 891 //            return null;\r
 892 //        }\r
 893 //    }\r
 894 \r
 895     protected String getContextMenuId() {\r
 896         return this.contextMenuId;\r
 897     }\r
 898 \r
 899     public void setUiContexts(Set<String> uiContext) {\r
 900         this.uiContext = uiContext;\r
 901     }\r
 902 \r
 903     public Set<String> getUiContexts() {\r
 904         return uiContext;\r
 905     }\r
 906 \r
 907     protected InputSource getInputSource() {\r
 908         return inputSource;\r
 909     }\r
 910 \r
 911     protected Map<String, Object> getArguments() {\r
 912         return args;\r
 913     }\r
 914 \r
 915     @SuppressWarnings("unchecked")\r
 916     protected <T> T getArgument(String key) {\r
 917         return (T) args.get(key);\r
 918     }\r
 919 \r
 920     protected DisposeState getDisposeState() {\r
 921         return disposeState;\r
 922     }\r
 923 \r
 924     public ISessionContext getSessionContext() {\r
 925         return sessionContext;\r
 926     }\r
 927 \r
 928     public ISessionContextProvider getSessionContextProvider() {\r
 929         return contextProvider;\r
 930     }\r
 931 \r
 932     @Override\r
 933     public boolean setFocus() {\r
 934         if (explorer != null && !explorer.isDisposed())\r
 935             explorer.setFocus();\r
 936         return true;\r
 937     }\r
 938 \r
 939     public void setWorkbenchListeners() {\r
 940         if (workbenchSelectionListener == null && getSite() != null) {\r
 941             ISelectionProvider selectionProvider = (ISelectionProvider) explorer.getAdapter(ISelectionProvider.class);\r
 942             getSite().setSelectionProvider(selectionProvider);\r
 943 \r
 944             // Listen to the workbench selection also to propagate it to\r
 945             // the explorer also.\r
 946             workbenchSelectionListener = new DefaultExplorerSelectionListener(site.getPage().getActivePart(), explorer);\r
 947             //System.out.println("ADD WORKBENCH SELECTION LISTENER: " + workbenchSelectionListener);\r
 948             getSite().getWorkbenchWindow().getSelectionService().addPostSelectionListener(workbenchSelectionListener);\r
 949         }\r
 950     }\r
 951 \r
 952     protected void removeWorkbenchListeners() {\r
 953         //System.out.println("REMOVE WORKBENCH SELECTION LISTENER: " + workbenchSelectionListener);\r
 954         // Remember to remove the installed workbench selection listener\r
 955         if (workbenchSelectionListener != null) {\r
 956             getSite().getWorkbenchWindow().getSelectionService().removePostSelectionListener(workbenchSelectionListener);\r
 957             workbenchSelectionListener = null;\r
 958 \r
 959             ISelectionProvider selectionProvider = (ISelectionProvider) explorer.getAdapter(ISelectionProvider.class);\r
 960             if(getSite().getSelectionProvider() == selectionProvider) getSite().setSelectionProvider(null);\r
 961             \r
 962         }\r
 963     }\r
 964 \r
 965     protected final void attachToSession() {\r
 966 \r
 967         // Track active ISessionContext changes\r
 968         //contextProvider = SimanticsUI.getSessionContextProvider(getViewSite().getWorkbenchWindow());\r
 969         contextProvider.addContextChangedListener(contextChangeListener);\r
 970 \r
 971         // Start tracking the current session context for input changes.\r
 972         // This will/must cause applySessionContext to get called.\r
 973         // Doing the applySessionContext initialization this way\r
 974         // instead of directly calling it will also make sure that\r
 975         // applySessionContext is only called once when first initialized,\r
 976         // and not twice like with the direct invocation.\r
 977         this.sessionContext = contextProvider.getSessionContext();\r
 978         sessionContextTracker.track(sessionContext);\r
 979     }\r
 980 \r
 981     // /////////////////////////////////////////////////////////////////////////\r
 982     // Override / implement these:\r
 983 \r
 984 //    /**\r
 985 //     * Returns an ID that is used for persisting a GraphExplorer instance.\r
 986 //     *\r
 987 //     * Used for </code>restoreState(IMemento)</code> and\r
 988 //     * <code>restoreState(IMemento)</code> in OntologyExplorer. Must be unique\r
 989 //     * within a workbench part.\r
 990 //     *\r
 991 //     * @return a unique name for this particular graph explorer view used for\r
 992 //     *         saving and restoring the state of this view part\r
 993 //     */\r
 994 //    public String getExplorerName() {\r
 995 //        return "GraphExplorerViewBase";\r
 996 //    }\r
 997 \r
 998     /**\r
 999      * Override this method to add controls to the view part. This is invoked\r
1000      * before attaching the view part to a database session.\r
1001      * \r
1002      * @param parent\r
1003      */\r
1004     protected void createControls(Composite parent) {\r
1005 \r
1006     }\r
1007 \r
1008     /**\r
1009      * Override this method and provide a proper context menu initializer if you\r
1010      * want to have this base class initialize one for you.\r
1011      * \r
1012      * @return the initializer to be used by {@link #createControls(Composite)}\r
1013      */\r
1014     protected IContextMenuInitializer getContextMenuInitializer() {\r
1015         String contextMenuId = getContextMenuId();\r
1016         if(contextMenuId != null) {\r
1017             return new ContextMenuInitializer(contextMenuId);\r
1018         } else {\r
1019             return null;\r
1020         }\r
1021     }\r
1022 \r
1023     /**\r
1024      * @param parent\r
1025      * @return\r
1026      */\r
1027     protected GraphExplorer createExplorerControl(Composite parent, Integer maxChildren) {\r
1028         GraphExplorerFactory factory = GraphExplorerFactory.getInstance();\r
1029         if(maxChildren != null) factory = factory.maxChildrenShown(maxChildren);\r
1030 \r
1031         GraphExplorer ge = factory\r
1032         .selectionDataResolver(new DefaultSelectionDataResolver())\r
1033         .selectionTransformation(selectionTransformation)\r
1034         .setServiceLocator(site)\r
1035         .create(parent, style);\r
1036 \r
1037         return ge;\r
1038     }\r
1039     \r
1040     protected GraphExplorer createExplorerControl2(Composite parent, Integer maxChildren) {\r
1041         GraphExplorerFactory factory = GraphExplorerFactory.getInstance();\r
1042         if(maxChildren != null) factory = factory.maxChildrenShown(maxChildren);\r
1043 \r
1044         GraphExplorer ge = factory\r
1045         .selectionDataResolver(new DefaultSelectionDataResolver())\r
1046         .selectionTransformation(selectionTransformation)\r
1047         .setServiceLocator(site)\r
1048         .create2(parent, style);\r
1049 \r
1050         return ge;\r
1051     }\r
1052 \r
1053     protected void setupDragSource(Session session) {\r
1054         if (dragSource instanceof SessionContainer) {\r
1055             ((SessionContainer) dragSource).setSession(session);\r
1056         }\r
1057     }\r
1058 \r
1059     /**\r
1060      * Override to customize the addition of listeners a newly created\r
1061      * GraphExplorer.\r
1062      * \r
1063      * @param explorer\r
1064      */\r
1065     protected void addListeners(GraphExplorer explorer, IMenuManager menuManager) {\r
1066         addSelectionInputListeners(explorer, menuManager);\r
1067     }\r
1068 \r
1069     protected void addSelectionInputListeners(GraphExplorer explorer, IMenuManager menuManager) {\r
1070         // Consider ENTER presses to simulate mouse left button double clicks\r
1071         explorer.addListener(new DefaultKeyListener(contextProvider, explorer, new Function<String[]>() {\r
1072             @Override\r
1073             public String[] execute(Object... obj) {\r
1074                 return getEditingColumn((NodeContext) obj[0]);\r
1075             }\r
1076         }));\r
1077         // Default double click handling\r
1078         explorer.addListener(new DefaultMouseListener(explorer));\r
1079     }\r
1080 \r
1081     protected String[] getEditingColumn(NodeContext context) {\r
1082         return editingColumn;\r
1083     }\r
1084     \r
1085     public void setEditingColumn(String... columnKeysInOrderOfTrial) {\r
1086         this.editingColumn = columnKeysInOrderOfTrial;\r
1087     }\r
1088 \r
1089     // Needed for preventing unnecessary re-initialization of the explorer with the same input.\r
1090     private Object currentInput;\r
1091     private Object currentRoot;\r
1092 \r
1093     /**\r
1094      * Invoke this to reinitialize the explorer and reset its input. The input\r
1095      * will be resolved from the specified ISessionContext based on the\r
1096      * {@link SessionContextInputSource} that is currently in use. If the input\r
1097      * is identical to the previous input, nothing will be done.\r
1098      * \r
1099      * @param context\r
1100      */\r
1101     public final boolean applySessionContext(ISessionContext context) {\r
1102 \r
1103         // If control is not alive anymore, do nothing.\r
1104         //System.out.println(this + ": applySessionContext(" + context + "), explorer="  + explorer);\r
1105         if (disposeState != DisposeState.Alive)\r
1106             return false;\r
1107 \r
1108         //System.out.println(this + ": initializeExplorer(" + explorer + ", " + context + ")");\r
1109         initializeExplorer(explorer, context);\r
1110 \r
1111 \r
1112         // Start tracking the session context.\r
1113         //\r
1114         // If this is not the same session that is currently tracked, it will\r
1115         // cause IHintListeners of the sessionContextTracker to fire.\r
1116         // For this we need the above input equality (identity) checking.\r
1117         // This is here just to make sure that we are tracking the correct\r
1118         // session context.\r
1119         sessionContextTracker.track(sessionContext);\r
1120 \r
1121         this.sessionContext = context;\r
1122         Object root = inputSource.get(context, currentInput);\r
1123         if (ObjectUtils.objectEquals(root, currentRoot))\r
1124             return false;\r
1125 \r
1126         currentRoot = root;\r
1127 \r
1128         //System.out.println(this + ": setRoot(" + input + ")");\r
1129         explorer.setUIContexts(uiContext);\r
1130         explorer.setRoot(root);\r
1131 \r
1132         return true;\r
1133 \r
1134     }\r
1135 \r
1136     protected boolean isImportantInput(Object previousSelection, Object selection) {\r
1137         return !ObjectUtils.objectEquals(previousSelection, selection);\r
1138     }\r
1139 \r
1140     public void setInput(Object selection, boolean force) {\r
1141 \r
1142         assert(created);\r
1143 \r
1144         if (isDisposed())\r
1145             return;\r
1146         if (sessionContext == null)\r
1147             return;\r
1148 \r
1149         // Check if this is a duplicate of the previous selection to reduce unnecessary flicker.\r
1150         if (!force && !isImportantInput(currentInput, selection))\r
1151             return;\r
1152 \r
1153         currentInput = selection;\r
1154 \r
1155         Object root = inputSource.get(sessionContext, selection);\r
1156 \r
1157         currentRoot = root;\r
1158 \r
1159         explorer.setUIContexts(uiContext);\r
1160 \r
1161         if (root == null) {\r
1162             explorer.setRoot(GraphExplorer.EMPTY_INPUT);\r
1163         } else {\r
1164             explorer.setRoot(root);\r
1165         }\r
1166 \r
1167     }\r
1168 \r
1169     public void setColumnsVisible(boolean visible) {\r
1170         explorer.setColumnsVisible(visible);\r
1171     }\r
1172 \r
1173     private int getColumnWidth(Column column, ExplorerState state) {\r
1174         // Get saved width from the persistor if there is one.\r
1175         if (state != null && state.columnWidths != null) {\r
1176                 Integer width = state.columnWidths.get(column.getLabel());\r
1177                 if (width != null)\r
1178                         return width;\r
1179         }\r
1180         return column.getWidth();\r
1181     }\r
1182     \r
1183     public void setColumns(Column[] columns) {\r
1184 \r
1185         explorer.setColumns(columns, new Consumer<Map<Column, Object>>() {\r
1186 \r
1187             @Override\r
1188             public void accept(Map<Column, Object> objects) {\r
1189                 ExplorerState state = null;\r
1190                 if (persistor != null) {\r
1191                         state = persistor.deserialize(\r
1192                                 Platform.getStateLocation(Activator.getDefault().getBundle()).toFile(),\r
1193                                 explorer.getRoot());\r
1194                 }\r
1195 \r
1196                 for(Map.Entry<Column, Object> entry : objects.entrySet()) {\r
1197                     Column column = entry.getKey();\r
1198                     TreeColumn treeColumn = (TreeColumn)entry.getValue();\r
1199 \r
1200                     if (column.getWidth() < 0) {\r
1201                         throw new IllegalArgumentException("Column minimum width cannot be < 0, got " + column.getWidth());\r
1202                     }\r
1203 \r
1204                     int width = getColumnWidth(column, state);\r
1205                     if(column.hasGrab()) {\r
1206                         \r
1207                         ad.setColumnData(treeColumn, new ColumnWeightData(column.getWeight(), width));\r
1208 \r
1209                     } else {\r
1210 \r
1211                         ad.setColumnData(treeColumn, new ColumnWeightData(0, width));\r
1212 \r
1213                     }\r
1214 \r
1215                 }\r
1216             }\r
1217 \r
1218         });\r
1219 \r
1220     }\r
1221 \r
1222     @Override\r
1223     public void setInput(ISessionContext context, Object input) {\r
1224         setInput(input, false);\r
1225     }\r
1226 \r
1227     public void setMaxChildren(int maxChildren) {\r
1228         explorer.setMaxChildren(maxChildren);\r
1229     }\r
1230     \r
1231     public <T> void addListener(ExplorerMouseListenerImpl<T> listener) {\r
1232         \r
1233         support.register(listener);\r
1234         listener.register(explorer);\r
1235         explorer.addListener(listener);\r
1236         \r
1237     }\r
1238 \r
1239 //    @Override\r
1240 //    public Point computeSize(int wHint, int hHint) {\r
1241 //      Point p = super.computeSize(wHint, hHint);\r
1242 //      System.err.println("graphExplorerComposite.computeSize " + p);\r
1243 //      return p;\r
1244 //    }\r
1245 //    \r
1246 //    @Override\r
1247 //    public Point computeSize(int wHint, int hHint, boolean changed) {\r
1248 //      Point p = super.computeSize(wHint, hHint, changed);\r
1249 //      System.err.println("graphExplorerComposite.computeSize " + p);\r
1250 //      return p;\r
1251 //    }\r
1252     \r
1253 }\r