org.simantics.district.region/src/org/simantics/district/region/DiagramRegions.java

   1 package org.simantics.district.region;
   2
   3 import java.awt.Shape;
   4 import java.awt.geom.FlatteningPathIterator;
   5 import java.awt.geom.Path2D;
   6 import java.awt.geom.PathIterator;
   7 import java.util.ArrayList;
   8 import java.util.Arrays;
   9 import java.util.Collection;
  10 import java.util.HashSet;
  11 import java.util.List;
  12 import java.util.Set;
  13 import java.util.UUID;
  14
  15 import org.simantics.Simantics;
  16 import org.simantics.databoard.Bindings;
  17 import org.simantics.db.ReadGraph;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.WriteGraph;
  20 import org.simantics.db.common.request.UniqueRead;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.db.layer0.QueryIndexUtils;
  23 import org.simantics.db.layer0.request.PossibleActiveModel;
  24 import org.simantics.db.layer0.util.RemoverUtil;
  25 import org.simantics.diagram.stubs.DiagramResource;
  26 import org.simantics.district.region.ontology.DiagramRegionsResource;
  27 import org.simantics.layer0.Layer0;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 public final class DiagramRegions {
  32
  33     private static final Logger LOGGER = LoggerFactory.getLogger(DiagramRegions.class);
  34
  35     public static Resource createRegionForDiagram(WriteGraph graph, Resource diagram, String label, double[] coordinates) throws DatabaseException {
  36         if (coordinates == null || coordinates.length < 6 || coordinates.length % 2 != 0)
  37             throw new IllegalArgumentException("Provided coordinates are not valid : " + Arrays.toString(coordinates));
  38         Path2D path = new Path2D.Double();
  39         double startX = coordinates[0];
  40         double startY = coordinates[1];
  41         path.moveTo(startX, startY);
  42         for (int i = 2; i < coordinates.length; i++)
  43             path.lineTo(coordinates[i], coordinates[++i]);
  44
  45         path.closePath(); // might not be needed
  46         DiagramRegionsResource DRR = DiagramRegionsResource.getInstance(graph);
  47         Layer0 L0 = Layer0.getInstance(graph);
  48         Resource region = graph.newResource();
  49         graph.claim(region, L0.InstanceOf, DRR.Region);
  50         graph.claim(diagram, DRR.hasRegion, region);
  51         graph.claim(region, DRR.regionOf, diagram);
  52         graph.claimLiteral(region, L0.HasName, UUID.randomUUID().toString(), Bindings.STRING);
  53         graph.claimLiteral(region, L0.HasLabel, label, Bindings.STRING);
  54         graph.claimLiteral(region, DRR.Region_area, coordinates, Bindings.DOUBLE_ARRAY);
  55         if (LOGGER.isDebugEnabled())
  56             LOGGER.debug("Created region for diagram {} with label {} and area {}", diagram, label, Arrays.toString(coordinates));
  57         return region;
  58     }
  59
  60     public static void removeRegion(WriteGraph graph, Resource region) throws DatabaseException {
  61         RemoverUtil.remove(graph, region);
  62     }
  63
  64     public static class DiagramRegion {
  65
  66         private Resource resource;
  67         private String label;
  68         private Shape shape;
  69
  70         public DiagramRegion(Resource resource, String label, Shape coordinatesToShape) {
  71             this.resource = resource;
  72             this.label = label;
  73             this.shape = coordinatesToShape;
  74         }
  75
  76         public Resource getResource() {
  77             return resource;
  78         }
  79
  80         public String getLabel() {
  81             return label;
  82         }
  83
  84         public Shape getShape() {
  85             return shape;
  86         }
  87     }
  88
  89     public static Collection<DiagramRegion> findRegions(ReadGraph graph, Resource model) throws DatabaseException {
  90         List<Resource> diagrams = QueryIndexUtils.searchByType(graph, model, DiagramResource.getInstance(graph).Diagram);
  91         Set<DiagramRegion> regions = new HashSet<>();
  92
  93         Layer0 L0 = Layer0.getInstance(graph);
  94
  95         for (Resource diagram : diagrams) {
  96             Collection<Resource> region = graph.getObjects(diagram, DiagramRegionsResource.getInstance(graph).hasRegion);
  97             for (Resource r : region) {
  98                 String label = graph.getRelatedValue(r, L0.HasLabel, Bindings.STRING);
  99                 Shape coordinatesToShape = DiagramRegions.coordinatesToShape(graph, r);
 100                 regions.add(new DiagramRegion(r, label, coordinatesToShape));
 101             }
 102         }
 103         return regions;
 104     }
 105
 106     public static class DiagramRegionsRequest extends UniqueRead<Collection<DiagramRegion>> {
 107
 108         @Override
 109         public Collection<DiagramRegion> perform(ReadGraph graph) throws DatabaseException {
 110             return findRegions(graph, graph.syncRequest(new PossibleActiveModel(Simantics.getProjectResource())));
 111         }
 112     }
 113
 114     public static Shape coordinatesToShape(ReadGraph graph, Resource region) throws DatabaseException {
 115         DiagramRegionsResource DRR = DiagramRegionsResource.getInstance(graph);
 116         double[] coordinates = graph.getRelatedValue(region, DRR.Region_area, Bindings.DOUBLE_ARRAY);
 117         Path2D path = new Path2D.Double();
 118         double startX = coordinates[0];
 119         double startY = coordinates[1];
 120         path.moveTo(startX, startY);
 121         for (int i = 2; i < coordinates.length; i++)
 122             path.lineTo(coordinates[i], coordinates[++i]);
 123
 124         path.closePath(); // might not be needed
 125         return path;
 126     }
 127
 128     public static double[] shapeToCoordinates(Shape shape) {
 129         PathIterator it = new FlatteningPathIterator(shape.getPathIterator(null), 1);
 130         double points[] = new double[6];
 131         double moveX = 0, moveY = 0;
 132         double thisX = 0, thisY = 0;
 133         int type = 0;
 134
 135         List<Double> coords = new ArrayList<>();
 136         // float factor = 1;
 137
 138         while (!it.isDone()) {
 139             type = it.currentSegment(points);
 140             switch (type) {
 141             case PathIterator.SEG_MOVETO:
 142                 moveX = points[0];
 143                 moveY = points[1];
 144                 coords.add(moveX);
 145                 coords.add(moveY);
 146                 break;
 147
 148             case PathIterator.SEG_CLOSE:
 149                 points[0] = moveX;
 150                 points[1] = moveY;
 151                 // Fall into....
 152                 break;
 153             case PathIterator.SEG_LINETO:
 154                 thisX = points[0];
 155                 thisY = points[1];
 156                 coords.add(thisX);
 157                 coords.add(thisY);
 158                 break;
 159             }
 160             it.next();
 161         }
 162         double[] finalCoords = new double[coords.size()];
 163         for (int i = 0; i < coords.size(); i++) {
 164             double d = coords.get(i);
 165             finalCoords[i] = d;
 166         }
 167         return finalCoords;
 168     }
 169
 170     public static Resource getDiagramForRegion(ReadGraph graph, Resource region) throws DatabaseException {
 171         DiagramRegionsResource DRR = DiagramRegionsResource.getInstance(graph);
 172         Resource diagram = graph.getSingleObject(region, DRR.regionOf);
 173         return diagram;
 174     }
 175 }