org.simantics.district.network.ui/src/org/simantics/district/network/ui/NetworkDrawingParticipant.java

   1
   2 package org.simantics.district.network.ui;
   3
   4 import java.awt.geom.AffineTransform;
   5 import java.awt.geom.Point2D;
   6 import java.util.ArrayList;
   7 import java.util.List;
   8
   9 import org.simantics.district.network.ui.adapters.DistrictNetworkVertexElement;
  10 import org.simantics.district.network.ui.nodes.DistrictNetworkVertexNode;
  11 import org.simantics.district.network.ui.nodes.NetworkDrawingNode;
  12 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
  13 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;
  14 import org.simantics.g2d.diagram.IDiagram;
  15 import org.simantics.g2d.diagram.handler.PickContext;
  16 import org.simantics.g2d.diagram.handler.PickRequest;
  17 import org.simantics.g2d.diagram.participant.AbstractDiagramParticipant;
  18 import org.simantics.g2d.element.IElement;
  19 import org.simantics.maps.MapScalingTransform;
  20 import org.simantics.scenegraph.g2d.G2DNode;
  21 import org.simantics.scenegraph.g2d.G2DParentNode;
  22 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  23 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  24
  25 public class NetworkDrawingParticipant extends AbstractDiagramParticipant {
  26
  27     @Dependency
  28     PickContext pick;
  29
  30     /**
  31      * A hint key for terminal pick distance in control pixels.
  32      * @see #PICK_DIST
  33      */
  34     public static final Key KEY_PICK_DISTANCE = new KeyOf(Double.class, "PICK_DISTANCE");
  35
  36     /**
  37      * Default terminal pick distance in control pixels.
  38      * @see #DEFAULT_PICK_DISTANCE
  39      */
  40     public static final double PICK_DIST = 10;
  41
  42     private NetworkDrawingNode node;
  43
  44     private AffineTransform transform;
  45
  46     public NetworkDrawingParticipant(AffineTransform transform) {
  47         this.transform = transform;
  48     }
  49
  50     @SGInit
  51     public void initSG(G2DParentNode parent) {
  52         node = parent.addNode("networkDrawingNode", NetworkDrawingNode.class);
  53         node.setTransform(transform);
  54         node.setNetworkDrawingParticipant(this);
  55     }
  56
  57     @Override
  58     protected void onDiagramSet(IDiagram newDiagram, IDiagram oldDiagram) {
  59         node.setDiagram(newDiagram);
  60     }
  61
  62     public boolean pickHoveredElement(Point2D currentMousePos) {
  63         PickRequest req = new PickRequest(currentMousePos.getX(), currentMousePos.getY());
  64         List<IElement> pickables = new ArrayList<IElement>();
  65         pick.pick(diagram, req, pickables);
  66
  67         List<IElement> snap = new ArrayList<>(diagram.getSnapshot());
  68
  69         snap.removeAll(pickables);
  70
  71         boolean changed = false;
  72         for (IElement sn : snap) {
  73             G2DNode node = sn.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
  74             if (node instanceof DistrictNetworkVertexNode) {
  75                 if (((DistrictNetworkVertexNode) node).hover(false) && !changed) {
  76                     changed = true;
  77                 }
  78             }
  79         }
  80
  81         for (IElement elem : pickables) {
  82             G2DNode node = elem.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
  83             if (node instanceof DistrictNetworkVertexNode) {
  84                 if (((DistrictNetworkVertexNode) node).hover(true) && !changed) {
  85                     changed = true;
  86                 }
  87             }
  88         }
  89         return changed;
  90     }
  91
  92 }