org.simantics.district.network.ui/src/org/simantics/district/network/ui/adapters/DistrictNetworkEdgeElement.java

   1 package org.simantics.district.network.ui.adapters;
   2
   3 import java.awt.Color;
   4 import java.awt.Shape;
   5 import java.awt.geom.AffineTransform;
   6 import java.awt.geom.Line2D;
   7 import java.awt.geom.Path2D;
   8 import java.awt.geom.PathIterator;
   9 import java.awt.geom.Point2D;
  10 import java.awt.geom.Rectangle2D;
  11 import java.util.Collection;
  12 import java.util.Collections;
  13
  14 import org.simantics.district.network.ModelledCRS;
  15 import org.simantics.district.network.ui.DistrictNetworkEdge;
  16 import org.simantics.district.network.ui.nodes.DistrictNetworkEdgeNode;
  17 import org.simantics.g2d.connection.handler.ConnectionHandler;
  18 import org.simantics.g2d.diagram.handler.PickRequest.PickPolicy;
  19 import org.simantics.g2d.diagram.handler.Topology.Connection;
  20 import org.simantics.g2d.element.ElementClass;
  21 import org.simantics.g2d.element.ElementUtils;
  22 import org.simantics.g2d.element.IElement;
  23 import org.simantics.g2d.element.SceneGraphNodeKey;
  24 import org.simantics.g2d.element.handler.InternalSize;
  25 import org.simantics.g2d.element.handler.Outline;
  26 import org.simantics.g2d.element.handler.Pick;
  27 import org.simantics.g2d.element.handler.SceneGraph;
  28 import org.simantics.g2d.element.handler.impl.ConnectionSelectionOutline;
  29 import org.simantics.g2d.element.handler.impl.DefaultTransform;
  30 import org.simantics.g2d.element.handler.impl.SimpleElementLayers;
  31 import org.simantics.maps.MapScalingTransform;
  32 import org.simantics.scenegraph.g2d.G2DParentNode;
  33 import org.simantics.scenegraph.g2d.nodes.SVGNode;
  34 import org.simantics.scenegraph.utils.NodeUtil;
  35 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  36 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 public class DistrictNetworkEdgeElement {
  41
  42     public static final Key KEY_DN_EDGE = new KeyOf(DistrictNetworkEdge.class, "DN_EDGE");
  43     public static final Key KEY_DN_EDGE_NODE = new SceneGraphNodeKey(DistrictNetworkEdgeNode.class, "DN_EDGE_NODE");
  44     public static final Key KEY_DN_EDGE_SYMBOL_NODE = new SceneGraphNodeKey(DistrictNetworkEdgeNode.class, "DN_EDGE_SYMBOL_NODE");
  45
  46     public static final ElementClass CLASS =
  47             ElementClass.compile(
  48                     DefaultTransform.INSTANCE,
  49                     DNEdgeInternalSize.INSTANCE,
  50                     DNEdgeSceneGraph.INSTANCE,
  51                     DNEdgeConnectionHandler.INSTANCE,
  52                     SimpleElementLayers.INSTANCE,
  53                     // TODO: do we need this and does it work?
  54                     ConnectionSelectionOutline.INSTANCE,
  55                     DistrictNetworkAdditionalColor.INSTANCE
  56             ).setId(DistrictNetworkEdgeElement.class.getSimpleName());
  57
  58     static final class DNEdgeSceneGraph implements SceneGraph {
  59
  60         public static final DNEdgeSceneGraph INSTANCE = new DNEdgeSceneGraph();
  61
  62         private static final long serialVersionUID = 68135568495835923L;
  63
  64         @Override
  65         public void init(IElement edgeElement, G2DParentNode parent) {
  66             DistrictNetworkEdge edge = edgeElement.getHint(KEY_DN_EDGE);
  67             if (edge == null) {
  68                 cleanup(edgeElement);
  69             } else {
  70                 DistrictNetworkEdgeNode node = edgeElement.getHint(KEY_DN_EDGE_NODE);
  71                 if (node == null) {
  72                     node = parent.addNode(ElementUtils.generateNodeId(edgeElement), DistrictNetworkEdgeNode.class);
  73                     edgeElement.setHint(KEY_DN_EDGE_NODE, node);
  74
  75                     SVGNode symbol = node.addNode(ElementUtils.generateNodeId(edgeElement), SVGNode.class);
  76                     edgeElement.setHint(KEY_DN_EDGE_SYMBOL_NODE, symbol);
  77                 }
  78
  79                 node.setColor(ElementUtils.getAdditionalColor(edgeElement, Color.BLUE));
  80
  81                 node.setDNEdge(edge);
  82                 AffineTransform at = ElementUtils.getTransform(edgeElement);
  83                 if (at != null)
  84                     node.setTransform(at);
  85             }
  86         }
  87
  88         @Override
  89         public void cleanup(IElement edge) {
  90             ElementUtils.removePossibleNode(edge, KEY_DN_EDGE_SYMBOL_NODE);
  91             ElementUtils.removePossibleNode(edge, KEY_DN_EDGE_NODE);
  92             edge.removeHint(KEY_DN_EDGE_NODE);
  93             edge.removeHint(KEY_DN_EDGE_SYMBOL_NODE);
  94         }
  95     }
  96
  97     static final class DNEdgeInternalSize implements InternalSize, Outline, Pick {
  98
  99         private static final Logger LOGGER = LoggerFactory.getLogger(DNEdgeInternalSize.class);
 100
 101         private static final long serialVersionUID = -7346653820911240628L;
 102
 103         public static final DNEdgeInternalSize INSTANCE = new DNEdgeInternalSize();
 104
 105         private ThreadLocal<Path2D> path = new ThreadLocal<Path2D>() {
 106             protected Path2D initialValue() { return new Path2D.Double(); }
 107         };
 108
 109         @Override
 110         public Rectangle2D getBounds(IElement e, Rectangle2D size) {
 111             DistrictNetworkEdge edge = e.getHint(KEY_DN_EDGE);
 112             if (size == null)
 113                 size = new Rectangle2D.Double();
 114             if (edge != null)
 115                 size.setFrame(DistrictNetworkEdgeNode.calculatePath(edge, path.get(), false).getBounds2D());
 116             else
 117                 LOGGER.debug("Element {} does not have edge!", e);
 118
 119             return size;
 120         }
 121
 122         @Override
 123         public Shape getElementShape(IElement e) {
 124             DistrictNetworkEdge edge = e.getHint(KEY_DN_EDGE);
 125             if (edge != null) {
 126                 return DistrictNetworkEdgeNode.calculatePath(edge, null, false);
 127             } else {
 128                 return getBounds(e, null);
 129             }
 130         }
 131
 132         @Override
 133         public boolean pickTest(IElement e, Shape s, PickPolicy policy) {
 134             DistrictNetworkEdge edge = e.getHint(KEY_DN_EDGE);
 135             if (edge != null) {
 136                 Rectangle2D bounds = getBounds(s);
 137                 switch (policy) {
 138                 case PICK_CONTAINED_OBJECTS:    return pickContainedObjects(edge, bounds);
 139                 case PICK_INTERSECTING_OBJECTS: return pickIntersectingObjects(e, edge, bounds);
 140                 }
 141                 return false;
 142             }
 143
 144             return false;
 145         }
 146
 147         private boolean pickContainedObjects(DistrictNetworkEdge edge, Rectangle2D bounds) {
 148             double bminx = bounds.getMinX() / MapScalingTransform.getScaleX();
 149             double bminy = bounds.getMinY() / MapScalingTransform.getScaleY();
 150             double bmaxx = bounds.getMaxX() / MapScalingTransform.getScaleX();
 151             double bmaxy = bounds.getMaxY() / MapScalingTransform.getScaleY();
 152
 153             double bsminx = ModelledCRS.xToLongitude(bminx);
 154             double bsminy = ModelledCRS.yToLatitude(-bminy); // Invert for Simantics diagram coordinate system
 155             double bsmaxx = ModelledCRS.xToLongitude(bmaxx);
 156             double bsmaxy = ModelledCRS.yToLatitude(-bmaxy); // Invert for Simantics diagram coordinate system
 157
 158             double boundsMinY = Math.min(bsminy, bsmaxy);
 159             double boundsMaxY = Math.max(bsminy, bsmaxy);
 160
 161             Point2D start = edge.getStartPoint();
 162             Point2D end = edge.getEndPoint();
 163
 164             double eminx = Math.min(start.getX(), end.getX());
 165             double eminy = Math.min(start.getY(), end.getY());
 166             double emaxx = Math.max(start.getX(), end.getX());
 167             double emaxy = Math.max(start.getY(), end.getY());
 168
 169             return eminx >= bsminx && eminy >= boundsMinY && emaxx <= bsmaxx && emaxy <= boundsMaxY;
 170         }
 171
 172         private boolean pickIntersectingObjects(IElement e, DistrictNetworkEdge edge, Rectangle2D bounds) {
 173             double dx = bounds.getWidth() / MapScalingTransform.getScaleX();
 174             double dy = bounds.getHeight() / MapScalingTransform.getScaleY();
 175
 176             // Half the diagonal + half of the line width
 177             DistrictNetworkEdgeNode node = e.getHint(KEY_DN_EDGE_NODE);
 178             AffineTransform at = NodeUtil.getLocalToGlobalTransform(node);
 179
 180             Path2D path = node.getPath();
 181             if (path == null)
 182                 return false;
 183
 184             double lineWidth = node.getStrokeWidth(at, true);
 185             double tolerance = Math.sqrt(dx * dx + dy * dy) / 2 + lineWidth / 2;
 186
 187             double sx = bounds.getCenterX() / MapScalingTransform.getScaleX();
 188             double sy = bounds.getCenterY() / MapScalingTransform.getScaleY();
 189
 190             double coords[] = new double[6];
 191             Point2D prevPoint = new Point2D.Double(), curPoint = new Point2D.Double();
 192             Line2D line = new Line2D.Double();
 193             for (PathIterator it = path.getPathIterator(null); !it.isDone(); it.next()) {
 194                 int type = it.currentSegment(coords);
 195                 switch (type) {
 196                 case PathIterator.SEG_MOVETO:
 197                     curPoint.setLocation(coords[0], coords[1]);
 198                     break;
 199                 case PathIterator.SEG_LINETO:
 200                     prevPoint.setLocation(curPoint);
 201                     curPoint.setLocation(coords[0], coords[1]);
 202                     line.setLine(prevPoint, curPoint);
 203                     double distSq = line.ptSegDistSq(sx, sy);
 204 //                    System.out.println("s: " + sx + ", " + sy);
 205 //                    System.out.println("ss: " + ssx + ", " + ssy);
 206 //                    System.out.println("p1: " + edge.getStartPoint());
 207 //                    System.out.println("p2: " + edge.getEndPoint());
 208 //                    System.out.println("line: " + "(" + line.getX1() + ", " + line.getY1() + ", " + line.getX2() + ", " + line.getY2() + ")");
 209 //                    System.out.println("distance from line is " + Math.sqrt(distSq) + " with tolerance " + tolerance);
 210                     if (distSq <= tolerance * tolerance)
 211                         return true;
 212                     break;
 213                 default:
 214                     LOGGER.error("Invalid edge path", new IllegalStateException());
 215                     return false;
 216                 }
 217             }
 218
 219             return false;
 220         }
 221
 222         private Rectangle2D getBounds(Shape shape) {
 223             if (shape instanceof Rectangle2D)
 224                 return (Rectangle2D) shape;
 225             return shape.getBounds2D();
 226         }
 227
 228     }
 229
 230     static class DNEdgeConnectionHandler implements ConnectionHandler {
 231
 232         private static final long serialVersionUID = -6882671891381761687L;
 233
 234         public static final DNEdgeConnectionHandler INSTANCE = new DNEdgeConnectionHandler();
 235
 236         @Override
 237         public Collection<IElement> getChildren(IElement connection, Collection<IElement> result) {
 238             return Collections.emptyList();
 239         }
 240
 241         @Override
 242         public Collection<IElement> getBranchPoints(IElement connection, Collection<IElement> result) {
 243             return Collections.emptyList();
 244         }
 245
 246         @Override
 247         public Collection<IElement> getSegments(IElement connection, Collection<IElement> result) {
 248             return Collections.emptyList();
 249         }
 250
 251         @Override
 252         public Collection<Connection> getTerminalConnections(IElement connection, Collection<Connection> result) {
 253             return Collections.emptyList();
 254         }
 255     }
 256
 257 }