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.awt.geom.Rectangle2D;
   7 import java.util.ArrayList;
   8 import java.util.List;
   9
  10 import org.simantics.district.network.ui.adapters.DistrictNetworkEdgeElement;
  11 import org.simantics.district.network.ui.adapters.DistrictNetworkVertexElement;
  12 import org.simantics.district.network.ui.nodes.DistrictNetworkEdgeNode;
  13 import org.simantics.district.network.ui.nodes.DistrictNetworkVertexNode;
  14 import org.simantics.district.network.ui.nodes.HoverSensitiveNode;
  15 import org.simantics.district.network.ui.nodes.NetworkDrawingNode;
  16 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
  17 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;
  18 import org.simantics.g2d.diagram.IDiagram;
  19 import org.simantics.g2d.diagram.handler.PickContext;
  20 import org.simantics.g2d.diagram.handler.PickRequest;
  21 import org.simantics.g2d.diagram.participant.AbstractDiagramParticipant;
  22 import org.simantics.g2d.element.IElement;
  23 import org.simantics.scenegraph.Node;
  24 import org.simantics.scenegraph.g2d.G2DParentNode;
  25 import org.simantics.scenegraph.g2d.IG2DNode;
  26 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  27 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  28
  29 public class NetworkDrawingParticipant extends AbstractDiagramParticipant {
  30
  31     public static final String NETWORK_DRAWING_NODE = "networkDrawingNode";
  32
  33         @Dependency
  34     PickContext pick;
  35
  36     /**
  37      * A hint key for terminal pick distance in control pixels.
  38      * @see #PICK_DIST
  39      */
  40     public static final Key KEY_PICK_DISTANCE = new KeyOf(Double.class, "PICK_DISTANCE");
  41
  42     /**
  43      * Default terminal pick distance in control pixels.
  44      * @see #DEFAULT_PICK_DISTANCE
  45      */
  46     public static final double PICK_DIST = 10;
  47
  48     private NetworkDrawingNode node;
  49
  50     private AffineTransform transform;
  51
  52     public NetworkDrawingParticipant(AffineTransform transform) {
  53         this.transform = transform;
  54     }
  55
  56     @SGInit
  57     public void initSG(G2DParentNode parent) {
  58         node = parent.addNode(NETWORK_DRAWING_NODE, NetworkDrawingNode.class);
  59         node.setTransform(transform);
  60         node.setNetworkDrawingParticipant(this);
  61     }
  62
  63     @Override
  64     protected void onDiagramSet(IDiagram newDiagram, IDiagram oldDiagram) {
  65         node.setDiagram(newDiagram);
  66     }
  67
  68     public boolean pickHoveredElement(Point2D currentMousePos, boolean isConnectionTool) {
  69         PickRequest req = new PickRequest(new Rectangle2D.Double(currentMousePos.getX(), currentMousePos.getY(), 1e-8, 1e-8)).context(getContext());
  70         List<IElement> pickables = new ArrayList<>();
  71         pick.pick(diagram, req, pickables);
  72
  73         List<IElement> snap = diagram.getSnapshot();
  74
  75         boolean changed = false;
  76         changed |= hoverNodes(snap, false, isConnectionTool, currentMousePos);
  77         changed |= hoverNodes(pickables, true, isConnectionTool, currentMousePos);
  78         return changed;
  79     }
  80
  81     private boolean hoverNodes(List<IElement> elements, boolean hover, boolean isConnectionTool, Point2D p) {
  82         boolean changed = false;
  83         for (IElement elem : elements) {
  84             Node node = elem.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
  85             if (node instanceof DistrictNetworkVertexNode) {
  86                 changed |= ((DistrictNetworkVertexNode) node).hover(hover, isConnectionTool);
  87                 if (hover)
  88                     ((DistrictNetworkVertexNode) node).setMousePosition(p);
  89             } else {
  90                 node = elem.getHint(DistrictNetworkEdgeElement.KEY_DN_EDGE_NODE);
  91                 if (node instanceof DistrictNetworkEdgeNode) {
  92                     for (IG2DNode n : ((DistrictNetworkEdgeNode) node).getNodes()) {
  93                         if (n instanceof HoverSensitiveNode) {
  94                             changed |= ((HoverSensitiveNode)n).hover(hover, isConnectionTool);
  95                             if (hover)
  96                                 ((HoverSensitiveNode)n).setMousePosition(p);
  97                         }
  98                     }
  99                 }
 100             }
 101         }
 102         return changed;
 103     }
 104
 105     public boolean isHoveringOverNode(Point2D currentMousePos) {
 106         PickRequest req = new PickRequest(currentMousePos).context(getContext());
 107         List<IElement> pickables = new ArrayList<IElement>();
 108         pick.pick(diagram, req, pickables);
 109         for (IElement elem : pickables) {
 110             Node node = elem.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
 111             if (node instanceof DistrictNetworkVertexNode) {
 112                 return true;
 113             }
 114         }
 115         return false;
 116     }
 117
 118     public AffineTransform getTransform() {
 119         return transform;
 120     }
 121 }