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