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

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