bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/handlers/HeadlessStructuralBrowsingHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.diagramEditor.handlers;
  13
  14 import java.util.Set;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.ReadGraph;
  17 import org.simantics.db.common.ResourceArray;
  18 import org.simantics.db.common.request.ReadRequest;
  19 import org.simantics.db.exception.DatabaseException;
  20 import org.simantics.db.management.ISessionContext;
  21 import org.simantics.diagram.stubs.DiagramResource;
  22 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;
  23 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
  24 import org.simantics.g2d.diagram.participant.Selection;
  25 import org.simantics.g2d.element.ElementHints;
  26 import org.simantics.g2d.element.IElement;
  27 import org.simantics.modeling.ModelingResources;
  28 import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
  29 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDoubleClickedEvent;
  30 import org.simantics.structural.stubs.StructuralResource2;
  31
  32 /**
  33  * StructuralBrowsingHandler supports visual browsing into subcomponents through
  34  * mouse events.
  35  *
  36  * @author Tuukka Lehtonen
  37  */
  38 public class HeadlessStructuralBrowsingHandler extends AbstractCanvasParticipant {
  39
  40     @Dependency
  41     Selection          selection;
  42     ISessionContext    sessionContext;
  43     ResourceArray      parentStructuralPath;
  44     IDiagramUpdateSupport diagramProvider;
  45
  46     public static interface IDiagramUpdateSupport {
  47         public void updateDiagram(ResourceArray structuralPath);
  48     }
  49
  50     public HeadlessStructuralBrowsingHandler(IDiagramUpdateSupport diagramProvider, ISessionContext sessionContext, ResourceArray parentStructuralPath) {
  51         assert diagramProvider != null;
  52
  53         this.diagramProvider = diagramProvider;
  54         this.sessionContext = sessionContext;
  55         this.parentStructuralPath = parentStructuralPath;
  56     }
  57
  58     @EventHandler(priority = 0)
  59     public boolean handleDoubleClick(MouseDoubleClickedEvent me) {
  60         if (sessionContext == null)
  61             return false;
  62
  63         Set<IElement> sel = selection.getSelection(0);
  64
  65         if (sel.size() == 1) {
  66             IElement e = sel.iterator().next();
  67             Object data = e.getHint(ElementHints.KEY_OBJECT);
  68             if (data instanceof Resource) {
  69                 final Resource element = (Resource) data;
  70                 sessionContext.getSession().asyncRequest(new ReadRequest() {
  71                     @Override
  72                     public void run(ReadGraph graph) throws DatabaseException {
  73                         ModelingResources mr = ModelingResources.getInstance(graph);
  74                         DiagramResource dr = DiagramResource.getInstance(graph);
  75                         StructuralResource2 sr = StructuralResource2.getInstance(graph);
  76
  77                         if (graph.isInstanceOf(element, dr.Flag)) {
  78                             /* FIXME: implement headless version
  79                             ContextMap parameters = new ContextMap();
  80                             parameters.put(ModelingOperationConstants.WORKBENCH_WINDOW, site.getWorkbenchWindow());
  81                             parameters.put(ModelingOperationConstants.WORKBENCH_PART, site.getPart());
  82                             parameters.put(IOperation.SUBJECT, element);
  83                             new NavigateToTarget().exec(graph.getSession(), parameters);
  84                             */
  85                             return;
  86                         }
  87
  88                         final Resource component = graph.getPossibleObject(element, mr.ElementToComponent);
  89                         if (component == null)
  90                             return;
  91
  92                         Resource type = graph.getSingleType(component, sr.Component);
  93                         if (type == null)
  94                             return;
  95
  96                         Resource definedBy = graph.getPossibleObject(type, sr.IsDefinedBy);
  97                         if (definedBy == null)
  98                             return;
  99
 100                         final Resource diagram = graph.getPossibleObject(definedBy, mr.CompositeToDiagram);
 101                         if (diagram == null)
 102                             return;
 103
 104                         diagramProvider.updateDiagram(parentStructuralPath.prepended(diagram, component));
 105                     }
 106                 });
 107             }
 108
 109             return true;
 110         }
 111
 112         return false;
 113     }
 114
 115 }