org.simantics.district.network/src/org/simantics/district/network/profile/ArrowLengthStyle.java

   1 package org.simantics.district.network.profile;
   2
   3 import java.util.Set;
   4
   5 import org.simantics.Simantics;
   6 import org.simantics.db.ReadGraph;
   7 import org.simantics.db.Resource;
   8 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
   9 import org.simantics.db.exception.DatabaseException;
  10 import org.simantics.layer0.Layer0;
  11 import org.simantics.scenegraph.INode;
  12 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  13 import org.simantics.scenegraph.g2d.nodes.ConnectionNode;
  14 import org.simantics.scenegraph.profile.EvaluationContext;
  15 import org.simantics.scenegraph.profile.common.ProfileVariables;
  16
  17 public class ArrowLengthStyle extends ThrottledStyleBase<Double> {
  18
  19         private static final Double PENDING = Double.NaN;
  20
  21         @Override
  22         public Double calculateThrottledStyle(ReadGraph graph, Resource runtimeDiagram, Resource entry, Resource groupItem) throws DatabaseException {
  23                 Resource diagram = graph.getSingleObject(groupItem, Layer0.getInstance(graph).PartOf);
  24                 Set<Resource> edgesToUse = graph.syncRequest(new MidBranchEdgeSetRequest(diagram), TransientCacheListener.instance());
  25                 if (!edgesToUse.contains(groupItem))
  26                         return null;
  27
  28                 DiagramSettings ds = graph.syncRequest(new DiagramSettingsRequest(runtimeDiagram), TransientCacheListener.instance());
  29                 // Prevent PendingVariableExceptions from coming through
  30                 boolean wasSynchronous = graph.setSynchronous(true);
  31                 try {
  32                         if (ds.arrowLengthProperty.isPresent()) {
  33                                 Double length = Simantics.applySCLRead(graph, ds.arrowLengthProperty.get(), groupItem);
  34                                 return length != null ? length * ds.arrowLengthGain + ds.arrowLengthBias : null;
  35                         }
  36                         else {
  37                                 return null;
  38                         }
  39                 }
  40                 finally {
  41                         graph.setSynchronous(wasSynchronous);
  42                 }
  43         }
  44
  45         @Override
  46         public void applyThrottledStyleForNode(EvaluationContext observer, INode node, Double value) {
  47 //              System.out.println("apply: " + node + " : " + value);
  48                 ConnectionNode n = (ConnectionNode) node;
  49                 if (value == PENDING) {
  50                         ((G2DSceneGraph)node.getRootNode()).setPending(node);
  51                 } else {
  52                         ((G2DSceneGraph)node.getRootNode()).clearPending(node);
  53                 }
  54                 for (INode nn : n.getNodes())
  55                         ProfileVariables.claimNodeProperty(nn, "arrowLength", value, observer);
  56         }
  57
  58         @Override
  59         protected void cleanupStyleForNode(EvaluationContext evaluationContext, INode node) {
  60                 ((G2DSceneGraph)node.getRootNode()).clearPending(node);
  61                 ConnectionNode n = (ConnectionNode) node;
  62                 for (INode nn : n.getNodes())
  63                         ProfileVariables.claimNodeProperty(nn, "arrowLength", null, evaluationContext);
  64         }
  65 }