bundles/org.simantics.views.swt/src/org/simantics/views/swt/SWTViewLoaderProcess.java

   1 package org.simantics.views.swt;\r
   2 \r
   3 import org.eclipse.ui.IWorkbenchSite;\r
   4 import org.simantics.Simantics;\r
   5 import org.simantics.browsing.ui.common.ErrorLogger;\r
   6 import org.simantics.browsing.ui.graph.impl.GraphInputSources;\r
   7 import org.simantics.browsing.ui.graph.impl.InputSourceListener;\r
   8 import org.simantics.browsing.ui.graph.impl.ObservableInputSource;\r
   9 import org.simantics.browsing.ui.graph.impl.SessionContextInputSource;\r
  10 import org.simantics.browsing.ui.graph.impl.WorkbenchSessionContextInputSource;\r
  11 import org.simantics.db.ReadGraph;\r
  12 import org.simantics.db.RequestProcessor;\r
  13 import org.simantics.db.Resource;\r
  14 import org.simantics.db.common.request.UniqueRead;\r
  15 import org.simantics.db.exception.DatabaseException;\r
  16 import org.simantics.db.layer0.variable.Variable;\r
  17 import org.simantics.db.layer0.variable.VariableRepository;\r
  18 import org.simantics.db.layer0.variable.Variables;\r
  19 import org.simantics.scenegraph.INode;\r
  20 import org.simantics.scenegraph.loader.ScenegraphLoaderProcess;\r
  21 import org.simantics.views.ontology.ViewsResources;\r
  22 import org.simantics.views.swt.client.base.SWTRoot;\r
  23 \r
  24 public class SWTViewLoaderProcess extends ScenegraphLoaderProcess {\r
  25 \r
  26         final private ModelledView view;\r
  27         final private IWorkbenchSite site;\r
  28         \r
  29         public static class ISL implements InputSourceListener {\r
  30                 \r
  31                 private SWTViewLoaderProcess process;\r
  32                 \r
  33                 ISL(SWTViewLoaderProcess process) {\r
  34                         this.process = process;\r
  35                 }\r
  36                 \r
  37                 void dispose() {\r
  38                         process = null;\r
  39                 }\r
  40                 \r
  41         @Override\r
  42         public void inputChanged(SessionContextInputSource source) {\r
  43                 if(process == null) return;\r
  44             Object input = source.get( Simantics.getSessionContext() );\r
  45             if (input != null)\r
  46                 process.view.inputChanged(source.getProvider(), input);\r
  47             else\r
  48                 ErrorLogger.defaultLogWarning("input source " + source + " invalidly returned null", new Exception("for stack trace only"));\r
  49         }\r
  50         };\r
  51         \r
  52     ISL inputSourceListener = new ISL(this);\r
  53         \r
  54         public SWTViewLoaderProcess(ModelledView view, IWorkbenchSite site, String name) {\r
  55                 super(name);\r
  56                 this.view = view;\r
  57                 this.site = site;\r
  58                 this.root = new SWTRoot(site);\r
  59         }\r
  60 \r
  61         public SWTViewLoaderProcess(ModelledView view, IWorkbenchSite site) {\r
  62                 this(view, site, "<unnamed SWTViewLoaderProcess>");\r
  63         }\r
  64 \r
  65         @Override\r
  66         public INode getRoot() {\r
  67                 return root;\r
  68         }\r
  69         \r
  70         @Override\r
  71         protected void initialize(RequestProcessor processor, final Variable configuration) throws DatabaseException {\r
  72                 \r
  73                 SessionContextInputSource inputSource = processor.sync(new UniqueRead<SessionContextInputSource>() {\r
  74                         @Override\r
  75                         public SessionContextInputSource perform(ReadGraph graph) throws DatabaseException {\r
  76                                 ViewsResources VIEW = ViewsResources.getInstance(graph);\r
  77                                 Resource represents = configuration.getRepresents(graph);\r
  78                                 Resource inputSource = graph.getPossibleObject(represents, VIEW.HasInputSource);\r
  79                                 if (inputSource == null)\r
  80                                         return GraphInputSources.projectSource();\r
  81                                 return graph.adapt(inputSource, SessionContextInputSource.class);\r
  82                         }\r
  83                 });\r
  84 \r
  85         if(view != null)\r
  86             view.setInputSource(inputSource);\r
  87 \r
  88         if (inputSource instanceof ObservableInputSource)\r
  89             ((ObservableInputSource) inputSource).setListener(inputSourceListener);\r
  90 \r
  91         if (inputSource instanceof WorkbenchSessionContextInputSource)\r
  92                         ((WorkbenchSessionContextInputSource) inputSource).init(site, view);\r
  93 \r
  94         }\r
  95         \r
  96         @Override\r
  97         public void dispose() {\r
  98                 \r
  99                 if (isDisposed())\r
 100                         return;\r
 101                 \r
 102                 inputSourceListener.dispose();\r
 103                 for(String uri : registeredURIs) VariableRepository.unregister(uri);\r
 104                 SWTRoot r = (SWTRoot)root;\r
 105                 r.dispose();\r
 106                 \r
 107                 super.dispose();\r
 108                 \r
 109         }\r
 110 \r
 111 }\r