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     @Dependency
  32     PickContext pick;
  33
  34     /**
  35      * A hint key for terminal pick distance in control pixels.
  36      * @see #PICK_DIST
  37      */
  38     public static final Key KEY_PICK_DISTANCE = new KeyOf(Double.class, "PICK_DISTANCE");
  39
  40     /**
  41      * Default terminal pick distance in control pixels.
  42      * @see #DEFAULT_PICK_DISTANCE
  43      */
  44     public static final double PICK_DIST = 10;
  45
  46     private NetworkDrawingNode node;
  47
  48     private AffineTransform transform;
  49
  50     public NetworkDrawingParticipant(AffineTransform transform) {
  51         this.transform = transform;
  52     }
  53
  54     @SGInit
  55     public void initSG(G2DParentNode parent) {
  56         node = parent.addNode("networkDrawingNode", NetworkDrawingNode.class);
  57         node.setTransform(transform);
  58         node.setNetworkDrawingParticipant(this);
  59     }
  60
  61     @Override
  62     protected void onDiagramSet(IDiagram newDiagram, IDiagram oldDiagram) {
  63         node.setDiagram(newDiagram);
  64     }
  65
  66     public boolean pickHoveredElement(Point2D currentMousePos, boolean isConnectionTool) {
  67         PickRequest req = new PickRequest(new Rectangle2D.Double(currentMousePos.getX(), currentMousePos.getY(), 1e-8, 1e-8)).context(getContext());
  68         List<IElement> pickables = new ArrayList<IElement>();
  69         pick.pick(diagram, req, pickables);
  70
  71         List<IElement> snap = new ArrayList<>(diagram.getSnapshot());
  72
  73         // snap.removeAll(pickables);
  74
  75         boolean changed = false;
  76         changed = hoverVertexNodes(snap, false, isConnectionTool, changed);
  77         changed = hoverEdgeNodes(snap, false, isConnectionTool, changed);
  78         changed = hoverVertexNodes(pickables, true, isConnectionTool, changed);
  79         changed = hoverEdgeNodes(pickables, true, isConnectionTool, changed);
  80         return changed;
  81     }
  82
  83     private boolean hoverVertexNodes(List<IElement> elements, boolean hover, boolean isConnectionTool, boolean changed) {
  84         for (IElement elem : elements) {
  85             Node node = elem.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
  86             if (node instanceof DistrictNetworkVertexNode) {
  87                 changed = ((DistrictNetworkVertexNode) node).hover(hover, isConnectionTool) || changed;
  88             }
  89         }
  90         return changed;
  91     }
  92
  93     private boolean hoverEdgeNodes(List<IElement> elements, boolean hover, boolean isConnectionTool, boolean changed) {
  94         for (IElement elem : elements) {
  95             Node node = elem.getHint(DistrictNetworkEdgeElement.KEY_DN_EDGE_NODE);
  96             if (node instanceof DistrictNetworkEdgeNode) {
  97                 for (IG2DNode n : ((DistrictNetworkEdgeNode) node).getNodes()) {
  98                     if (n instanceof HoverSensitiveNode) {
  99                         changed = ((HoverSensitiveNode)n).hover(hover, isConnectionTool) || changed;
 100                     }
 101                 }
 102             }
 103         }
 104         return changed;
 105     }
 106
 107     public boolean isHoveringOverNode(Point2D currentMousePos) {
 108         PickRequest req = new PickRequest(currentMousePos).context(getContext());
 109         List<IElement> pickables = new ArrayList<IElement>();
 110         pick.pick(diagram, req, pickables);
 111         for (IElement elem : pickables) {
 112             Node node = elem.getHint(DistrictNetworkVertexElement.KEY_DN_VERTEX_NODE);
 113             if (node instanceof DistrictNetworkVertexNode) {
 114                 return true;
 115             }
 116         }
 117         return false;
 118     }
 119
 120     public AffineTransform getTransform() {
 121         return transform;
 122     }
 123 }