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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * 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.sysdyn.ui.properties;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 import java.util.HashMap;\r
  17 import java.util.Map;\r
  18 \r
  19 import org.eclipse.core.runtime.IAdaptable;\r
  20 import org.eclipse.jface.layout.GridDataFactory;\r
  21 import org.eclipse.jface.layout.GridLayoutFactory;\r
  22 import org.eclipse.jface.resource.JFaceResources;\r
  23 import org.eclipse.jface.resource.LocalResourceManager;\r
  24 import org.eclipse.jface.viewers.ISelectionProvider;\r
  25 import org.eclipse.jface.viewers.IStructuredSelection;\r
  26 import org.eclipse.jface.viewers.StructuredSelection;\r
  27 import org.eclipse.swt.SWT;\r
  28 import org.eclipse.swt.custom.ScrolledComposite;\r
  29 import org.eclipse.swt.events.DisposeEvent;\r
  30 import org.eclipse.swt.events.DisposeListener;\r
  31 import org.eclipse.swt.events.SelectionAdapter;\r
  32 import org.eclipse.swt.events.SelectionEvent;\r
  33 import org.eclipse.swt.graphics.Point;\r
  34 import org.eclipse.swt.widgets.Composite;\r
  35 import org.eclipse.swt.widgets.Event;\r
  36 import org.eclipse.swt.widgets.Group;\r
  37 import org.eclipse.swt.widgets.Label;\r
  38 import org.eclipse.swt.widgets.Listener;\r
  39 import org.eclipse.swt.widgets.Tree;\r
  40 import org.eclipse.swt.widgets.TreeItem;\r
  41 import org.eclipse.ui.IWorkbenchSite;\r
  42 import org.simantics.browsing.ui.BuiltinKeys;\r
  43 import org.simantics.browsing.ui.Column;\r
  44 import org.simantics.browsing.ui.Column.Align;\r
  45 import org.simantics.browsing.ui.NodeContext;\r
  46 import org.simantics.browsing.ui.common.ColumnKeys;\r
  47 import org.simantics.browsing.ui.common.NodeContextBuilder.MapNodeContext;\r
  48 import org.simantics.browsing.ui.swt.SingleSelectionInputSource;\r
  49 import org.simantics.browsing.ui.swt.widgets.Button;\r
  50 import org.simantics.browsing.ui.swt.widgets.GraphExplorerComposite;\r
  51 import org.simantics.browsing.ui.swt.widgets.StringPropertyFactory;\r
  52 import org.simantics.browsing.ui.swt.widgets.StringPropertyModifier;\r
  53 import org.simantics.browsing.ui.swt.widgets.TrackedCombo;\r
  54 import org.simantics.browsing.ui.swt.widgets.TrackedText;\r
  55 import org.simantics.browsing.ui.swt.widgets.impl.ComboModifyListenerImpl;\r
  56 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactoryImpl;\r
  57 import org.simantics.browsing.ui.swt.widgets.impl.SelectionListenerImpl;\r
  58 import org.simantics.browsing.ui.swt.widgets.impl.TextModifyListener;\r
  59 import org.simantics.browsing.ui.swt.widgets.impl.TrackedModifyEvent;\r
  60 import org.simantics.browsing.ui.swt.widgets.impl.Widget;\r
  61 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;\r
  62 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupportImpl;\r
  63 import org.simantics.db.ReadGraph;\r
  64 import org.simantics.db.Resource;\r
  65 import org.simantics.db.WriteGraph;\r
  66 import org.simantics.db.common.procedure.adapter.DisposableListener;\r
  67 import org.simantics.db.common.utils.ListUtils;\r
  68 import org.simantics.db.exception.DatabaseException;\r
  69 import org.simantics.db.management.ISessionContext;\r
  70 import org.simantics.db.request.Read;\r
  71 import org.simantics.jfreechart.chart.properties.RangeComposite;\r
  72 import org.simantics.jfreechart.chart.properties.xyline.AxisAndVariablesExplorerComposite;\r
  73 import org.simantics.layer0.Layer0;\r
  74 import org.simantics.layer0.utils.direct.GraphUtils;\r
  75 import org.simantics.sysdyn.SysdynResource;\r
  76 import org.simantics.sysdyn.ui.properties.widgets.factories.IntegerPropertyFactory;\r
  77 import org.simantics.sysdyn.ui.properties.widgets.factories.IntegerPropertyModifier;\r
  78 import org.simantics.sysdyn.ui.properties.widgets.sensitivity.DistributionPropertyWidget;\r
  79 import org.simantics.sysdyn.ui.properties.widgets.sensitivity.ParameterChildRule;\r
  80 import org.simantics.sysdyn.ui.properties.widgets.sensitivity.VariableNameModifier;\r
  81 import org.simantics.sysdyn.ui.validation.ParameterExistsValidator;\r
  82 import org.simantics.ui.SimanticsUI;\r
  83 import org.simantics.utils.RunnableWithObject;\r
  84 import org.simantics.utils.datastructures.ArrayMap;\r
  85 import org.simantics.utils.ui.AdaptionUtils;\r
  86 import org.simantics.utils.ui.validators.IntegerValidator;\r
  87 \r
  88 /**\r
  89  * Tab for displaying sensitivity analysis experiment properties\r
  90  * \r
  91  * @author Tuomas Miettinen\r
  92  *\r
  93  */\r
  94 public class SensitivityAnalysisExperimentTab extends LabelPropertyTabContributor implements Widget {\r
  95 \r
  96     private GraphExplorerComposite explorer;\r
  97     private WidgetSupportImpl parameterSupport = new WidgetSupportImpl();\r
  98     private ScrolledComposite propertyContainer;\r
  99     private Composite parameterProperties;\r
 100     private Composite content;\r
 101     private Button remove;\r
 102     private Resource experiment;\r
 103     \r
 104     private boolean dirty = false;\r
 105     \r
 106     private DisposableListener<Collection<Resource>> contentListener;\r
 107 \r
 108     @Override\r
 109     public void createControls(Composite body, IWorkbenchSite site,\r
 110             final ISessionContext context, WidgetSupport support) {\r
 111         support.register(this);\r
 112 \r
 113         Composite composite = new RemoveFocusBeforeExperimentComposite(body, SWT.NONE);\r
 114         GridDataFactory.fillDefaults().grab(true, true).applyTo(composite);\r
 115         GridLayoutFactory.fillDefaults().margins(3, 3).applyTo(composite);\r
 116         \r
 117         // Scrolled composite for displaying properties of a selection in explorer\r
 118         propertyContainer = new ScrolledComposite(composite, SWT.H_SCROLL | SWT.V_SCROLL);\r
 119         GridDataFactory.fillDefaults().grab(true, true).applyTo(propertyContainer);\r
 120         GridLayoutFactory.fillDefaults().applyTo(propertyContainer);\r
 121         propertyContainer.setExpandHorizontal(true);\r
 122         propertyContainer.setExpandVertical(true);\r
 123         \r
 124         content = new Composite(propertyContainer, SWT.NONE);\r
 125         GridDataFactory.fillDefaults().grab(true, true).applyTo(content);\r
 126         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(content);\r
 127 \r
 128         // Label\r
 129         Composite labelComposite = new Composite(content, SWT.NONE);\r
 130         GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(labelComposite);\r
 131         GridLayoutFactory.fillDefaults().numColumns(6).applyTo(labelComposite);\r
 132         Label label = new Label(labelComposite, SWT.NONE);\r
 133         label.setText("Name");\r
 134 \r
 135         TrackedText name = new TrackedText(labelComposite, support, SWT.BORDER);\r
 136         name.setTextFactory(new StringPropertyFactory(Layer0.URIs.HasLabel));\r
 137         name.addModifyListener(new StringPropertyModifier(context, Layer0.URIs.HasLabel));\r
 138         name.addModifyListener(new StringPropertyModifier(context, Layer0.URIs.HasName));\r
 139         name.setColorProvider(new SysdynBasicColorProvider(new LocalResourceManager(JFaceResources.getResources(), name.getWidget())));\r
 140         GridDataFactory.fillDefaults().grab(true, false).applyTo(name.getWidget());\r
 141         \r
 142         label = new Label(labelComposite, SWT.NONE);\r
 143         label.setText("Number of runs");\r
 144         \r
 145         TrackedText n = new TrackedText(labelComposite, support, SWT.BORDER);\r
 146         n.setTextFactory(new IntegerPropertyFactory(SysdynResource.URIs.SensitivityAnalysisExperiment_numberOfValues));\r
 147         n.addModifyListener(new IntegerPropertyModifier(context, SysdynResource.URIs.SensitivityAnalysisExperiment_numberOfValues));\r
 148         n.setInputValidator(new IntegerValidator());\r
 149         n.setColorProvider(new SysdynBasicColorProvider(new LocalResourceManager(JFaceResources.getResources(), n.getWidget())));\r
 150         GridDataFactory.fillDefaults().hint(80, SWT.DEFAULT).applyTo(n.getWidget());\r
 151         \r
 152         label = new Label(labelComposite, SWT.NONE);\r
 153         label.setText("Seed");\r
 154         \r
 155         TrackedText seed = new TrackedText(labelComposite, support, SWT.BORDER);\r
 156         seed.setTextFactory(new IntegerPropertyFactory(SysdynResource.URIs.SensitivityAnalysisExperiment_randomSeed));\r
 157         seed.addModifyListener(new IntegerPropertyModifier(context, SysdynResource.URIs.SensitivityAnalysisExperiment_randomSeed));\r
 158         seed.setInputValidator(new IntegerValidator());\r
 159         seed.setColorProvider(new SysdynBasicColorProvider(new LocalResourceManager(JFaceResources.getResources(), seed.getWidget())));\r
 160         GridDataFactory.fillDefaults().hint(80, SWT.DEFAULT).applyTo(seed.getWidget());\r
 161 \r
 162         // (Ontology-based) GraphExplorer displaying range axis and variables mapped to those axis\r
 163         explorer = new AxisAndVariablesExplorerComposite(ArrayMap.keys(\r
 164                 "displaySelectors", "displayFilter", "treeView").values(false, false, true), site, content, support, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE);\r
 165         \r
 166         explorer.setBrowseContexts(SysdynResource.URIs.SensitivityAnalysisExperiment_ParameterBrowseContext);\r
 167         explorer.setInputSource(new SingleSelectionInputSource(\r
 168                 Resource.class));\r
 169         explorer.getExplorer().setAutoExpandLevel(2); // Expand everything in the beginning\r
 170         explorer.setColumns( new Column[] { new Column(ColumnKeys.SINGLE, Align.LEFT, 0, "", true) });\r
 171         explorer.finish();\r
 172         \r
 173         \r
 174         ((Tree)explorer.getExplorerControl()).addSelectionListener(new SelectionAdapter() {\r
 175             public void widgetSelected(SelectionEvent e) {\r
 176                 updateSelection(context);\r
 177             }\r
 178         });\r
 179 \r
 180         /* Listener for displaying information of the first parameter during view initialization\r
 181          * The view does not have focus, so normal selection listener mechanisms do not work. \r
 182          * Need to do it the hard way. \r
 183          */ \r
 184         Listener listener = new Listener() {\r
 185 \r
 186             boolean flag = false;\r
 187             @Override\r
 188             public void handleEvent(Event event) {\r
 189                 switch (event.type) {\r
 190                     case SWT.Activate:\r
 191                     case SWT.Show:\r
 192                     case SWT.Paint:\r
 193                     {\r
 194                         if(!flag && ((Tree) event.widget).getItems().length > 0) {\r
 195                             flag = true;\r
 196                             TreeItem item = ((Tree) event.widget).getItems()[0];\r
 197                             IAdaptable adaptable = (IAdaptable) item.getData();\r
 198                             MapNodeContext nc = (MapNodeContext) adaptable.getAdapter(NodeContext.class);\r
 199                             parameterSupport.fireInput(context, new StructuredSelection(nc.getConstant(BuiltinKeys.INPUT)));\r
 200                             propertyContainer.setContent(content);\r
 201                             Point size = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);\r
 202                             propertyContainer.setMinSize(size);\r
 203                         }\r
 204                     }\r
 205                 }\r
 206             }\r
 207         };\r
 208 \r
 209         Tree tree = explorer.getExplorerControl();\r
 210         tree.addListener(SWT.Activate, listener);\r
 211         tree.addListener(SWT.Show, listener);\r
 212         tree.addListener(SWT.Paint,listener);\r
 213         /* End listener for displaying information for first parameter during view initialization*/\r
 214         \r
 215         explorer.addDisposeListener(new DisposeListener() {\r
 216             \r
 217             @Override\r
 218             public void widgetDisposed(DisposeEvent e) {\r
 219                 if(contentListener != null)\r
 220                     contentListener.dispose();              \r
 221             }\r
 222         });\r
 223         \r
 224         \r
 225         GridDataFactory.fillDefaults().hint(250, SWT.DEFAULT).grab(false, true).applyTo(explorer);\r
 226 \r
 227         Group parameterPropertyGroup = new Group(content, SWT.NONE);\r
 228         GridDataFactory.fillDefaults().grab(true, false).applyTo(parameterPropertyGroup);\r
 229         GridLayoutFactory.fillDefaults().applyTo(parameterPropertyGroup);\r
 230         \r
 231         parameterProperties = new Composite(parameterPropertyGroup, SWT.NONE);\r
 232         GridDataFactory.fillDefaults().grab(true, false).applyTo(parameterProperties);\r
 233         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parameterProperties);\r
 234 \r
 235         // Label\r
 236         label = new Label(parameterProperties, SWT.NONE);\r
 237         label.setText("Variable:");\r
 238         GridDataFactory.fillDefaults().align(SWT.END, SWT.CENTER).applyTo(label);\r
 239 \r
 240         TrackedText variable = new TrackedText(parameterProperties, parameterSupport, SWT.BORDER);\r
 241         variable.setTextFactory(new StringPropertyFactory(SysdynResource.URIs.SensitivityAnalysisExperiment_Parameter_variable));\r
 242         variable.addModifyListener(new VariableNameModifier(variable.getWidget(), parameterSupport, SysdynResource.URIs.SensitivityAnalysisExperiment_Parameter_variable, SysdynResource.URIs.SensitivityAnalysisExperiment_Parameter_indexes));\r
 243         variable.setColorProvider(new SysdynBasicColorProvider(new LocalResourceManager(JFaceResources.getResources(), variable.getWidget())));\r
 244         variable.setInputValidator(new ParameterExistsValidator(parameterSupport, variable));\r
 245         GridDataFactory.fillDefaults().grab(true, false).applyTo(variable.getWidget());\r
 246         \r
 247         label = new Label(parameterProperties, SWT.NONE);\r
 248         label.setText("Range:");\r
 249         GridDataFactory.fillDefaults().align(SWT.END, SWT.CENTER).applyTo(label);\r
 250         \r
 251         RangeComposite rangeComposite = new RangeComposite(parameterProperties, context, parameterSupport, SWT.NONE) {\r
 252             @Override\r
 253             protected Resource getIndexRelation(ReadGraph graph) {\r
 254                 return SysdynResource.getInstance(graph).SensitivityAnalysisExperiment_Parameter_indexes;\r
 255             }\r
 256         };\r
 257         GridDataFactory.fillDefaults().grab(true, false).applyTo(rangeComposite);\r
 258         \r
 259 //        TrackedText variable = new TrackedText(parameterProperties, parameterSupport, SWT.BORDER);\r
 260 //        variable.setTextFactory(new StringPropertyFactory(SysdynResource.URIs.SensitivityAnalysisExperiment_Parameter_variable));\r
 261 //        variable.addModifyListener(new StringPropertyModifier(context, SysdynResource.URIs.SensitivityAnalysisExperiment_Parameter_variable));\r
 262 //        variable.setColorProvider(new SysdynBasicColorProvider(new LocalResourceManager(JFaceResources.getResources(), variable.getWidget())));\r
 263 //        GridDataFactory.fillDefaults().grab(true, false).applyTo(variable.getWidget());\r
 264 \r
 265         label = new Label(parameterProperties, SWT.NONE);\r
 266         label.setText("Distribution:");\r
 267         GridDataFactory.fillDefaults().align(SWT.END, SWT.CENTER).applyTo(label);\r
 268 \r
 269         TrackedCombo distributionSelector = new TrackedCombo(parameterProperties, parameterSupport, SWT.DROP_DOWN);\r
 270         distributionSelector.setItemFactory(new ReadFactoryImpl<Resource, Map<String,Object>>() {\r
 271 \r
 272             @Override\r
 273             public Map<String, Object> perform(ReadGraph graph, Resource input) throws DatabaseException {\r
 274                 SysdynResource SR = SysdynResource.getInstance(graph);\r
 275                 Map<String, Object> items = new HashMap<String, Object>();\r
 276 \r
 277                 items.put("Normal", SR.NormalDistribution);\r
 278                 items.put("Uniform", SR.UniformDistribution);\r
 279                 items.put("Interval", SR.Interval);\r
 280 \r
 281                 return items;\r
 282             }\r
 283 \r
 284         });\r
 285 \r
 286         distributionSelector.setSelectionFactory(new ReadFactoryImpl<Resource, String>() {\r
 287 \r
 288             @Override\r
 289             public String perform(ReadGraph graph, Resource parameter) throws DatabaseException {\r
 290                 SysdynResource SR = SysdynResource.getInstance(graph);\r
 291                 Resource distribution = graph.getPossibleObject(parameter, SR.SensitivityAnalysisExperiment_Parameter_propabilityDistribution);\r
 292                 if(distribution == null)\r
 293                     return null;\r
 294                 \r
 295                 if(graph.isInstanceOf(distribution, SR.UniformDistribution))\r
 296                     return "Uniform";\r
 297                 else if(graph.isInstanceOf(distribution, SR.NormalDistribution))\r
 298                     return "Normal";\r
 299                 else if(graph.isInstanceOf(distribution, SR.Interval))\r
 300                     return "Interval";\r
 301                 else\r
 302                     return "";\r
 303 \r
 304             }\r
 305         });\r
 306 \r
 307         distributionSelector.addModifyListener(new ComboModifyListenerImpl<Resource>() {\r
 308 \r
 309             @Override\r
 310             public void applyText(WriteGraph graph, Resource input, String text)\r
 311                     throws DatabaseException {\r
 312                 if(text == null || text.isEmpty())\r
 313                     return;\r
 314 \r
 315                 SysdynResource SR = SysdynResource.getInstance(graph);\r
 316 \r
 317                 Resource type = SR.UniformDistribution;\r
 318 \r
 319                 if("Normal".equals(text))\r
 320                     type = SR.NormalDistribution;\r
 321                 else if("Interval".equals(text))\r
 322                     type = SR.Interval; \r
 323 \r
 324                 graph.deny(input, SR.SensitivityAnalysisExperiment_Parameter_propabilityDistribution);\r
 325 \r
 326                 GraphUtils.create2(graph, type,\r
 327                         SR.SensitivityAnalysisExperiment_Parameter_propabilityDistribution_Inverse, input);\r
 328 \r
 329                 dirty = true;\r
 330             }\r
 331         });\r
 332 \r
 333         distributionSelector.addModifyListener(new TextModifyListener() {\r
 334 \r
 335             @Override\r
 336             public void modifyText(TrackedModifyEvent e) {\r
 337                 if(dirty) {\r
 338                     parameterSupport.update();\r
 339                     dirty = false;\r
 340                     propertyContainer.setContent(content);\r
 341                     Point size = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);\r
 342                     propertyContainer.setMinSize(size);\r
 343                 }\r
 344             }\r
 345         });\r
 346 \r
 347         label = new Label(parameterProperties, SWT.NONE);\r
 348         \r
 349         DistributionPropertyWidget dpw = new DistributionPropertyWidget(parameterProperties, context, parameterSupport, SWT.NONE);\r
 350         GridDataFactory.fillDefaults().grab(true, true).applyTo(dpw);\r
 351 \r
 352         \r
 353         Composite buttonComposite = new Composite(content, SWT.NONE);\r
 354         GridDataFactory.fillDefaults().applyTo(buttonComposite);\r
 355         GridLayoutFactory.fillDefaults().numColumns(3).applyTo(buttonComposite);\r
 356         \r
 357         \r
 358         Button addVariable = new Button(buttonComposite, support, SWT.NONE);\r
 359         addVariable.setText("Add parameter");\r
 360         addVariable.addSelectionListener(new SelectionListenerImpl<Resource>(context) {\r
 361 \r
 362             @Override\r
 363             public void apply(WriteGraph graph, Resource input) throws DatabaseException {\r
 364                 SysdynResource sr = SysdynResource.getInstance(graph);\r
 365                 Layer0 L0 = Layer0.getInstance(graph);\r
 366                 \r
 367                 Resource distribution = GraphUtils.create2(graph, sr.UniformDistribution,\r
 368                         sr.UniformDistribution_minValue, 0.0,\r
 369                         sr.UniformDistribution_maxValue, 10.0);\r
 370                 \r
 371                 Resource parameter = GraphUtils.create2(graph, sr.SensitivityAnalysisExperiment_Parameter,\r
 372                         sr.SensitivityAnalysisExperiment_Parameter_propabilityDistribution, distribution,\r
 373                         sr.SensitivityAnalysisExperiment_Parameter_variable, "<Write variable name>",\r
 374                         L0.PartOf, input);\r
 375                 \r
 376                 Resource parameterList = graph.getPossibleObject(input, sr.SensitivityAnalysisExperiment_parameterList);\r
 377                 ListUtils.insertBack(graph, parameterList, Collections.singleton(parameter));\r
 378             }\r
 379         });\r
 380 \r
 381         remove = new Button(buttonComposite, parameterSupport, SWT.NONE);\r
 382         remove.setText("Remove");\r
 383         remove.addSelectionListener(new SelectionListenerImpl<Resource>(context) {\r
 384 \r
 385             @Override\r
 386             public void apply(WriteGraph graph, Resource input) throws DatabaseException {\r
 387                 if(input == null)\r
 388                     return;\r
 389                 \r
 390                 SysdynResource sr = SysdynResource.getInstance(graph);\r
 391                 Layer0 L0 = Layer0.getInstance(graph);\r
 392                 \r
 393                 Resource experiment = graph.getPossibleObject(input, L0.PartOf);\r
 394                 Resource parameterList = graph.getPossibleObject(experiment, sr.SensitivityAnalysisExperiment_parameterList);\r
 395                 \r
 396                 if(ListUtils.toList(graph, parameterList).size() > 1)\r
 397                     ListUtils.removeElement(graph, parameterList, input);\r
 398  \r
 399             }\r
 400             \r
 401         });\r
 402         \r
 403 \r
 404         propertyContainer.setContent(content);\r
 405         Point size = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);\r
 406         propertyContainer.setMinSize(size);\r
 407 \r
 408     }\r
 409 \r
 410 \r
 411     /**\r
 412      * Updates the content of propertyContainer  \r
 413      * @param context\r
 414      */\r
 415     private void updateSelection(ISessionContext context) {\r
 416         ISelectionProvider selectionProvider = (ISelectionProvider)explorer.getAdapter(ISelectionProvider.class);\r
 417         IStructuredSelection selection = (IStructuredSelection)selectionProvider.getSelection();\r
 418         parameterSupport.fireInput(context, selection);\r
 419 \r
 420         propertyContainer.setContent(content);\r
 421         Point size = content.computeSize(SWT.DEFAULT, SWT.DEFAULT);\r
 422         propertyContainer.setMinSize(size);\r
 423     }\r
 424 \r
 425 \r
 426     @Override\r
 427     public void setInput(ISessionContext context, Object input) {\r
 428         experiment = AdaptionUtils.adaptToSingle(input, Resource.class);\r
 429         if(contentListener == null) {\r
 430             contentListener = new DisposableListener<Collection<Resource>>() {\r
 431 \r
 432                 @Override\r
 433                 public void execute(Collection<Resource> result) {\r
 434                     if(remove != null && !remove.getWidget().isDisposed() && result != null) {\r
 435                         remove.getWidget().getDisplay().asyncExec(new RunnableWithObject(result) {\r
 436                             @Override\r
 437                             public void run() {\r
 438                                 if(!remove.getWidget().isDisposed()) {\r
 439                                     @SuppressWarnings("unchecked")\r
 440                                     Collection<Resource> result = (Collection<Resource>) getObject();\r
 441                                     if(result.size() > 1)\r
 442                                         remove.getWidget().setEnabled(true);\r
 443                                     else\r
 444                                         remove.getWidget().setEnabled(false);\r
 445                                 }\r
 446                             }\r
 447                         });\r
 448 \r
 449                     }\r
 450                 }\r
 451 \r
 452                 @Override\r
 453                 public void exception(Throwable t) {\r
 454                     t.printStackTrace();\r
 455                 }\r
 456             };\r
 457 \r
 458             SimanticsUI.getSession().asyncRequest(new Read<Collection<Resource>> () {\r
 459 \r
 460                 @SuppressWarnings("unchecked")\r
 461                 @Override\r
 462                 public Collection<Resource> perform(ReadGraph graph) throws DatabaseException {\r
 463                     return (Collection<Resource>) new ParameterChildRule().getChildren(graph, experiment);\r
 464                 }\r
 465 \r
 466             }, contentListener);\r
 467         }\r
 468 \r
 469         \r
 470     }\r
 471 \r
 472 }\r