bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/BranchPointClassFactory.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.diagram.adapter;
  13
  14
  15 import org.simantics.db.AsyncReadGraph;
  16 import org.simantics.db.Resource;
  17 import org.simantics.db.common.procedure.adapter.AsyncProcedureAdapter;
  18 import org.simantics.db.common.procedure.guarded.GuardedAsyncProcedureWrapper;
  19 import org.simantics.db.procedure.AsyncProcedure;
  20 import org.simantics.diagram.stubs.DiagramResource;
  21 import org.simantics.diagram.synchronization.SynchronizationHints;
  22 import org.simantics.diagram.synchronization.graph.TransformSynchronizer;
  23 import org.simantics.g2d.canvas.ICanvasContext;
  24 import org.simantics.g2d.diagram.IDiagram;
  25 import org.simantics.g2d.element.ElementClass;
  26 import org.simantics.g2d.element.IElement;
  27 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  28 import org.simantics.g2d.elementclass.BranchPoint;
  29 import org.simantics.g2d.elementclass.BranchPoint.Direction;
  30 import org.simantics.g2d.elementclass.BranchPointClass;
  31
  32 /**
  33  * @author Tuukka Lehtonen
  34  */
  35 public class BranchPointClassFactory extends ElementFactoryAdapter {
  36
  37     public static ElementClass create(Resource elementClass) {
  38         return BranchPointClass.CLASS.newClassWith(false, new StaticObjectAdapter(elementClass));
  39     }
  40
  41     @Override
  42     public void create(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementType, AsyncProcedure<ElementClass> procedure) {
  43         procedure.execute(graph, BranchPointClass.CLASS.newClassWith(false, new StaticObjectAdapter(elementType)));
  44     }
  45
  46     @Override
  47     public void load(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, final Resource element, final IElement e, final AsyncProcedure<IElement> procedure) {
  48         e.setHint(SynchronizationHints.HINT_SYNCHRONIZER, TransformSynchronizer.INSTANCE);
  49
  50         final AsyncProcedure<IElement> guard = new GuardedAsyncProcedureWrapper<IElement>(procedure, 2);
  51
  52         final BranchPoint bp = e.getElementClass().getAtMostOneItemOfClass(BranchPoint.class);
  53         if (bp != null) {
  54             final DiagramResource dr = graph.getService(DiagramResource.class);
  55             graph.forHasStatement(element, dr.Horizontal, element, new AsyncProcedureAdapter<Boolean>() {
  56                 @Override
  57                 public void exception(AsyncReadGraph graph, Throwable throwable) {
  58                     guard.exception(graph, throwable);
  59                 }
  60                 @Override
  61                 public void execute(AsyncReadGraph graph, final Boolean horizontal) {
  62                     graph.forHasStatement(element, dr.Vertical, element, new AsyncProcedure<Boolean>() {
  63                         @Override
  64                         public void exception(AsyncReadGraph graph, Throwable throwable) {
  65                             guard.exception(graph, throwable);
  66                         }
  67                         @Override
  68                         public void execute(AsyncReadGraph graph, Boolean vertical) {
  69                             Direction direction = Direction.Any;
  70                             if (horizontal ^ vertical)
  71                                 direction = horizontal ? Direction.Horizontal : Direction.Vertical;
  72                             bp.setDirectionPreference(e, direction);
  73
  74                             guard.execute(graph, e);
  75                         }
  76                     });
  77                 }
  78             });
  79         }
  80
  81         ElementFactoryUtil.readTransform(graph, element, e, guard);
  82     }
  83
  84 }