org.simantics.district.network.ui/src/org/simantics/district/network/ui/nodes/NetworkDrawingNode.java

   1 package org.simantics.district.network.ui.nodes;
   2
   3 import java.awt.BasicStroke;
   4 import java.awt.Color;
   5 import java.awt.Graphics2D;
   6 import java.awt.Stroke;
   7 import java.awt.geom.Path2D;
   8 import java.awt.geom.Point2D;
   9 import java.awt.geom.Rectangle2D;
  10 import java.util.ArrayList;
  11 import java.util.Iterator;
  12 import java.util.List;
  13
  14 import org.simantics.Simantics;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.WriteGraph;
  17 import org.simantics.db.common.request.WriteRequest;
  18 import org.simantics.db.exception.DatabaseException;
  19 import org.simantics.diagram.ui.DiagramModelHints;
  20 import org.simantics.district.network.ui.DNEdgeBuilder;
  21 import org.simantics.district.network.ui.NetworkDrawingParticipant;
  22 import org.simantics.g2d.canvas.Hints;
  23 import org.simantics.g2d.canvas.IToolMode;
  24 import org.simantics.g2d.diagram.IDiagram;
  25 import org.simantics.scenegraph.g2d.G2DNode;
  26 import org.simantics.scenegraph.g2d.events.EventTypes;
  27 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;
  28 import org.simantics.scenegraph.g2d.events.MouseEvent;
  29 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseClickEvent;
  30 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDoubleClickedEvent;
  31 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;
  32 import org.simantics.scenegraph.utils.GeometryUtils;
  33 import org.simantics.scenegraph.utils.NodeUtil;
  34
  35 public class NetworkDrawingNode extends G2DNode {
  36
  37     private static final long serialVersionUID = -3475301184009620573L;
  38
  39     private Point2D currentMousePos = null;
  40
  41     private List<Point2D> nodes = new ArrayList<>();
  42
  43     private Resource diagramResource;
  44
  45     private boolean committed;
  46
  47     private NetworkDrawingParticipant participant;
  48
  49     private IDiagram diagram;
  50
  51     private static final Stroke DASHED_STROKE = new BasicStroke(2.0f,
  52             BasicStroke.CAP_ROUND,
  53             BasicStroke.JOIN_ROUND,
  54             4.0f, new float[]{4.0f}, 0.0f);
  55
  56     private static final Color BLUE_ALPHA = new Color(0, 0, 255, 100);
  57
  58     private boolean scaleStroke = true;
  59
  60     @Override
  61     public void init() {
  62         super.init();
  63         addEventHandler(this);
  64     }
  65
  66     public void setNetworkDrawingParticipant(NetworkDrawingParticipant participant) {
  67         this.participant = participant;
  68     }
  69
  70     public void setDiagram(IDiagram diagram) {
  71         if (diagram != null) {
  72             this.diagram = diagram;
  73             this.diagramResource = diagram.getHint(DiagramModelHints.KEY_DIAGRAM_RESOURCE);
  74         }
  75     }
  76
  77     @Override
  78     public void render(Graphics2D g2d) {
  79         if (nodes.isEmpty())
  80             return;
  81
  82         Path2D path = new Path2D.Double();
  83         Iterator<Point2D> nodeIter = nodes.iterator();
  84         if (nodeIter.hasNext()) {
  85             Point2D node = nodeIter.next();
  86             path.moveTo(node.getX(), node.getY());
  87         }
  88         while (nodeIter.hasNext()) {
  89             Point2D node = nodeIter.next();
  90             path.lineTo(node.getX(), node.getY());
  91         }
  92         if (currentMousePos != null)
  93             path.lineTo(currentMousePos.getX(), currentMousePos.getY());
  94
  95         Color old = g2d.getColor();
  96         Stroke oldStroke = g2d.getStroke();
  97
  98         if (DASHED_STROKE != null) {
  99             if (scaleStroke && DASHED_STROKE instanceof BasicStroke) {
 100                 BasicStroke bs = GeometryUtils.scaleStroke(DASHED_STROKE, (float) (1.0 / GeometryUtils.getScale(g2d.getTransform())));
 101                 g2d.setStroke(bs);
 102             } else {
 103                 g2d.setStroke(DASHED_STROKE);
 104             }
 105         }
 106
 107         g2d.setColor(BLUE_ALPHA);
 108
 109         g2d.draw(path);
 110
 111         g2d.setStroke(oldStroke);
 112         g2d.setColor(old);
 113     }
 114
 115     @Override
 116     public Rectangle2D getBoundsInLocal() {
 117         return null;
 118     }
 119
 120     @Override
 121     public int getEventMask() {
 122         return EventTypes.AnyMask;
 123     }
 124
 125     @Override
 126     protected boolean mouseDoubleClicked(MouseDoubleClickedEvent e) {
 127         // nodes to path2d
 128         IToolMode mode = getToolMode();
 129         if (mode == Hints.CONNECTTOOL || e.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK)) {
 130             Point2D start = null;
 131             Point2D end = null;
 132             Iterator<Point2D> nodeIter = nodes.iterator();
 133             while (nodeIter.hasNext()) {
 134                 if (end == null) {
 135                     start = nodeIter.next();
 136                 } else {
 137                     start = end;
 138                 }
 139                 end = nodeIter.next();
 140
 141                 createEdge(start, end);
 142             }
 143
 144             nodes.clear();
 145             committed = true;
 146
 147             repaint();
 148
 149             return true;
 150         }
 151         return super.mouseDoubleClicked(e);
 152     }
 153
 154     private void createEdge(Point2D start, Point2D end) {
 155
 156         double padding = GeometryUtils.getScale(getTransform());
 157
 158         double[] startCoords = new double[] { start.getX(), start.getY() };
 159         double[] endCoords = new double[] { end.getX(), end.getY() };
 160
 161         DNEdgeBuilder builder = new DNEdgeBuilder(diagramResource, diagram);
 162         Simantics.getSession().asyncRequest(new WriteRequest() {
 163
 164             @Override
 165             public void perform(WriteGraph graph) throws DatabaseException {
 166                 builder.create(graph, startCoords, endCoords, padding);
 167             }
 168         });
 169
 170     }
 171
 172     @Override
 173     protected boolean mouseClicked(MouseClickEvent e) {
 174         // check ToolMode
 175         IToolMode mode = getToolMode();
 176         if (mode == Hints.CONNECTTOOL || e.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK)) {
 177             if (committed) {
 178                 committed = false;
 179                 return false;
 180             }
 181             if (e.button == MouseEvent.RIGHT_BUTTON && !nodes.isEmpty()) {
 182                 nodes.remove(nodes.size() - 1);
 183             } else if (e.button == MouseEvent.LEFT_BUTTON) {
 184                 Point2D localPos = NodeUtil.worldToLocal(this, e.controlPosition, new Point2D.Double());
 185                 nodes.add(new Point2D.Double(localPos.getX(), localPos.getY()));
 186             }
 187             repaint();
 188             return true;
 189         }
 190         return super.mouseClicked(e);
 191     }
 192
 193     private IToolMode getToolMode() {
 194         return participant.getHint(Hints.KEY_TOOL);
 195     }
 196
 197     @Override
 198     protected boolean mouseMoved(MouseMovedEvent e) {
 199         IToolMode mode = getToolMode();
 200         if (mode == Hints.CONNECTTOOL || e.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK)) {
 201             boolean repaint = false;
 202             Point2D p = NodeUtil.worldToLocal(this, e.controlPosition, new Point2D.Double());
 203             if (participant.pickHoveredElement(p)) {
 204                 repaint = true;
 205             }
 206             if (!nodes.isEmpty()) {
 207                 currentMousePos = p;
 208
 209                 repaint();
 210                 return true;
 211             }
 212             currentMousePos = null;
 213             if (repaint == true)
 214                 repaint();
 215         }
 216         return super.mouseMoved(e);
 217     }
 218
 219     @Override
 220     protected boolean keyPressed(KeyPressedEvent e) {
 221         if (e.keyCode == java.awt.event.KeyEvent.VK_ESCAPE) {
 222             nodes.clear();
 223             repaint();
 224             return true;
 225         }
 226         return super.keyPressed(e);
 227
 228     }
 229 }