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

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