bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/connection/RouteGraphNode.java

   1 /*******************************************************************************
   2  * Copyright (c) 2011 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.scenegraph.g2d.nodes.connection;
  13
  14 import java.awt.BasicStroke;
  15 import java.awt.Color;
  16 import java.awt.Graphics2D;
  17 import java.awt.RenderingHints;
  18 import java.awt.Shape;
  19 import java.awt.Stroke;
  20 import java.awt.event.KeyEvent;
  21 import java.awt.geom.AffineTransform;
  22 import java.awt.geom.Path2D;
  23 import java.awt.geom.Point2D;
  24 import java.awt.geom.Rectangle2D;
  25 import java.lang.reflect.Constructor;
  26 import java.util.Collection;
  27 import java.util.List;
  28 import java.util.Map;
  29
  30 import org.simantics.diagram.connection.RouteGraph;
  31 import org.simantics.diagram.connection.RouteLine;
  32 import org.simantics.diagram.connection.RouteLink;
  33 import org.simantics.diagram.connection.RouteTerminal;
  34 import org.simantics.diagram.connection.actions.IAction;
  35 import org.simantics.diagram.connection.actions.IReconnectAction;
  36 import org.simantics.diagram.connection.actions.MoveAction;
  37 import org.simantics.diagram.connection.actions.ReconnectLineAction;
  38 import org.simantics.diagram.connection.delta.RouteGraphDelta;
  39 import org.simantics.diagram.connection.rendering.BasicConnectionStyle;
  40 import org.simantics.diagram.connection.rendering.ConnectionStyle;
  41 import org.simantics.diagram.connection.rendering.IRouteGraphRenderer;
  42 import org.simantics.diagram.connection.rendering.StyledRouteGraphRenderer;
  43 import org.simantics.diagram.connection.rendering.arrows.ILineEndStyle;
  44 import org.simantics.diagram.connection.splitting.SplittedRouteGraph;
  45 import org.simantics.scenegraph.INode;
  46 import org.simantics.scenegraph.ISelectionPainterNode;
  47 import org.simantics.scenegraph.g2d.G2DNode;
  48 import org.simantics.scenegraph.g2d.G2DParentNode;
  49 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  50 import org.simantics.scenegraph.g2d.IG2DNode;
  51 import org.simantics.scenegraph.g2d.events.EventTypes;
  52 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;
  53 import org.simantics.scenegraph.g2d.events.KeyEvent.KeyReleasedEvent;
  54 import org.simantics.scenegraph.g2d.events.MouseEvent;
  55 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonPressedEvent;
  56 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonReleasedEvent;
  57 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseClickEvent;
  58 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDragBegin;
  59 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;
  60 import org.simantics.scenegraph.g2d.events.command.CommandEvent;
  61 import org.simantics.scenegraph.g2d.events.command.Commands;
  62 import org.simantics.scenegraph.g2d.nodes.GridNode;
  63 import org.simantics.scenegraph.g2d.nodes.LinkNode;
  64 import org.simantics.scenegraph.g2d.nodes.NavigationNode;
  65 import org.simantics.scenegraph.g2d.nodes.SVGNodeAssignment;
  66 import org.simantics.scenegraph.g2d.nodes.connection.HighlightActionPointsAction.Action;
  67 import org.simantics.scenegraph.g2d.nodes.connection.HighlightActionPointsAction.Pick;
  68 import org.simantics.scenegraph.g2d.snap.ISnapAdvisor;
  69 import org.simantics.scenegraph.utils.ColorUtil;
  70 import org.simantics.scenegraph.utils.GeometryUtils;
  71 import org.simantics.scenegraph.utils.InitValueSupport;
  72 import org.simantics.scenegraph.utils.NodeUtil;
  73 import org.slf4j.Logger;
  74 import org.slf4j.LoggerFactory;
  75
  76 import gnu.trove.map.hash.THashMap;
  77
  78 /**
  79  * @author Tuukka Lehtonen
  80  */
  81 public class RouteGraphNode extends G2DNode implements ISelectionPainterNode, InitValueSupport  {
  82
  83     private static final Logger LOGGER = LoggerFactory.getLogger(RouteGraphNode.class);
  84
  85         private static final long       serialVersionUID = -917194130412280965L;
  86
  87     private static final double     TOLERANCE        = IAction.TOLERANCE;
  88     private static final Stroke     SELECTION_STROKE = new BasicStroke(1f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER);
  89     private static final Color      SELECTION_COLOR  = new Color(255, 0, 255, 96);
  90
  91     private static final HighlightActionPointsAction highlightActions = new HighlightActionPointsAction(null);
  92
  93     protected RouteGraph            rg;
  94     protected IRouteGraphRenderer   baseRenderer;
  95     protected IRouteGraphRenderer   renderer;
  96     protected double                pickTolerance    = TOLERANCE;
  97     protected boolean               editable         = true;
  98     private boolean                 branchable       = true;
  99
 100     protected IRouteGraphListener   rgListener;
 101     protected RouteGraphDelta       rgDelta;
 102
 103     protected transient double      mouseX;
 104     protected transient double      mouseY;
 105     protected transient Point2D     pt               = new Point2D.Double();
 106
 107     protected transient MoveAction  dragAction;
 108     protected transient IAction     currentAction;
 109     protected transient Rectangle2D bounds;
 110
 111     /**
 112      * Dynamic color for connection rendering.
 113      */
 114     protected transient Color       dynamicColor;
 115
 116     /**
 117      * Dynamic stroke for connection rendering.
 118      */
 119     protected transient Stroke      dynamicStroke;
 120
 121     protected transient Path2D      selectionPath    = new Path2D.Double();
 122     protected transient Stroke      selectionStroke  = null;
 123
 124     protected transient boolean     highlightActionsEnabled = false;
 125     protected transient AffineTransform lastViewTransform = null;
 126
 127     /**
 128      * x = NaN is used to indicate that possible branch point should not be
 129      * rendered but interaction has not ended yet.
 130      */
 131     protected transient Point2D     newBranchPointPosition = null;
 132
 133
 134     protected transient Map<Object,ILineEndStyle> dynamicStyles = null;
 135
 136     private transient boolean ignoreSelection = false;
 137
 138     @Override
 139     public void initValues() {
 140         dynamicColor = null;
 141         wrapRenderer();
 142     }
 143
 144     private static float tryParseFloat(String s, float def) {
 145         try {
 146                 return Float.parseFloat(s);
 147         } catch (NumberFormatException e) {
 148                 LOGGER.error("Could not parse '" + s + "' into float.");
 149                 return def;
 150         }
 151     }
 152
 153     /*
 154      * 1.0 BUTT MITER 1.0 0.0
 155      */
 156     private static Stroke parseStroke(String definition) {
 157
 158         float width = 1.0f;
 159         int cap = BasicStroke.CAP_BUTT;
 160         int join = BasicStroke.JOIN_MITER;
 161         float miterLimit = 1.0f;
 162         float[] dash = { 1, 0};
 163         float dash_phase = 0;
 164
 165         String[] parts = definition.split(" ");
 166
 167         if(parts.length > 0) {
 168                 width = tryParseFloat(parts[0], width);
 169         }
 170         if(parts.length > 1) {
 171                 if("BUTT".equals(parts[1])) cap = BasicStroke.CAP_BUTT;
 172                 else if("ROUND".equals(parts[1])) cap = BasicStroke.CAP_ROUND;
 173                 else if("SQUARE".equals(parts[1])) cap = BasicStroke.CAP_SQUARE;
 174         }
 175         if(parts.length > 2) {
 176                 if("BEVEL".equals(parts[2])) cap = BasicStroke.JOIN_BEVEL;
 177                 else if("MITER".equals(parts[2])) cap = BasicStroke.JOIN_MITER;
 178                 else if("ROUND".equals(parts[2])) cap = BasicStroke.JOIN_ROUND;
 179         }
 180         if(parts.length > 3) {
 181                 miterLimit = tryParseFloat(parts[3], miterLimit);
 182         }
 183         if(parts.length > 4) {
 184                 dash_phase = tryParseFloat(parts[4], dash_phase);
 185         }
 186         if(parts.length > 6) {
 187                 dash = new float[parts.length - 5];
 188                 for(int i=5;i<parts.length;i++) {
 189                         dash[i-5] = tryParseFloat(parts[i], 1.0f);
 190                 }
 191         }
 192
 193
 194         try {
 195                 return new BasicStroke(width, cap, join, miterLimit, dash, dash_phase);
 196         } catch (IllegalArgumentException e) {
 197                 return new BasicStroke();
 198         }
 199
 200     }
 201
 202     public void setAssignments(List<SVGNodeAssignment> assignments) {
 203         for(SVGNodeAssignment ass : assignments) {
 204                 if("dynamicColor".equals(ass.elementId)) {
 205                         setDynamicColor(ColorUtil.hexColor(ass.value));
 206                 } else if("dynamicStroke".equals(ass.elementId)) {
 207                         setDynamicStroke(parseStroke(ass.value));
 208                 }
 209         }
 210     }
 211
 212     public void setIgnoreSelection(boolean value) {
 213         ignoreSelection = value;
 214     }
 215
 216     public boolean getIgnoreSelection() {
 217         return ignoreSelection;
 218     }
 219
 220     @PropertySetter("color")
 221     @SyncField(value = {"dynamicColor"})
 222     public void setDynamicColor(Color color) {
 223         this.dynamicColor = color;
 224         wrapRenderer();
 225     }
 226
 227     @PropertySetter("width")
 228     @SyncField("dynamicStroke")
 229     public void setDynamicStroke(Stroke stroke) {
 230         this.dynamicStroke = stroke;
 231         wrapRenderer();
 232         createSelectionStroke();
 233     }
 234
 235     @SyncField(value = {"dynamicStyles"})
 236     public void setDynamicLineEnd(RouteTerminal terminal, ILineEndStyle style) {
 237         if (dynamicStyles == null)
 238                 dynamicStyles = new THashMap<Object, ILineEndStyle>();
 239         terminal.setDynamicStyle(style);
 240         if (terminal.getData() != null) {
 241                 if (style != null)
 242                         dynamicStyles.put(terminal.getData(),style);
 243                 else
 244                         dynamicStyles.remove(terminal.getData());
 245         }
 246     }
 247
 248     private void updateLineEnds() {
 249         if (dynamicStyles == null)
 250                 return;
 251         for (RouteTerminal t : rg.getTerminals()) {
 252                 if (t.getData() == null)
 253                         continue;
 254                 ILineEndStyle dynamicStyle = dynamicStyles.get(t.getData());
 255                 if (dynamicStyle != null)
 256                         t.setDynamicStyle(dynamicStyle);
 257         }
 258     }
 259
 260     @SyncField(value = {"rg"})
 261     public void setRouteGraph(RouteGraph graph) {
 262         this.rg = graph;
 263         updateLineEnds();
 264         updateBounds();
 265     }
 266
 267     @SyncField(value = {"rgDelta"})
 268     public void setRouteGraphDelta(RouteGraphDelta delta) {
 269         this.rgDelta = delta;
 270     }
 271
 272     @SyncField(value = {"renderer"})
 273     public void setRenderer(IRouteGraphRenderer renderer) {
 274
 275         this.baseRenderer = renderer;
 276         wrapRenderer();
 277
 278         createSelectionStroke();
 279     }
 280
 281     private void createSelectionStroke() {
 282          BasicConnectionStyle style = tryGetStyle();
 283          selectionStroke = null;
 284          if (style != null) {
 285              BasicStroke stroke = (BasicStroke) style.getLineStroke();
 286              if (stroke != null) {
 287                  float width = Math.max(stroke.getLineWidth() + 0.75f, stroke.getLineWidth()*1.3f);
 288                  selectionStroke = new BasicStroke(width, BasicStroke.CAP_BUTT, stroke.getLineJoin());
 289              }
 290          } else {
 291              selectionStroke = SELECTION_STROKE;
 292          }
 293     }
 294
 295     private void wrapRenderer() {
 296
 297         if(baseRenderer == null) {
 298             renderer = null;
 299             return;
 300         }
 301
 302         if(dynamicColor != null || dynamicStroke != null) {
 303             BasicConnectionStyle baseStyle = (BasicConnectionStyle)tryGetStyle(baseRenderer);
 304             try {
 305                 Constructor<? extends BasicConnectionStyle> c = baseStyle.getClass().getConstructor(Color.class, Color.class, double.class, Stroke.class, Stroke.class, double.class, double.class);
 306                 renderer = new StyledRouteGraphRenderer(c.newInstance(
 307                         dynamicColor != null ? dynamicColor : baseStyle.getLineColor(),
 308                                 baseStyle.getBranchPointColor(), baseStyle.getBranchPointRadius(),
 309                                     dynamicStroke != null ? dynamicStroke : baseStyle.getLineStroke(),
 310                                             dynamicStroke != null ? dynamicStroke : baseStyle.getRouteLineStroke(),
 311                                                     baseStyle.getDegeneratedLineLength(), baseStyle.getRounding()));
 312             } catch (Exception e) {
 313                 renderer = new StyledRouteGraphRenderer(new BasicConnectionStyle(
 314                         dynamicColor != null ? dynamicColor : baseStyle.getLineColor(),
 315                                 baseStyle.getBranchPointColor(), baseStyle.getBranchPointRadius(),
 316                                     dynamicStroke != null ? dynamicStroke : baseStyle.getLineStroke(),
 317                                             dynamicStroke != null ? dynamicStroke : baseStyle.getRouteLineStroke(),
 318                                                     baseStyle.getDegeneratedLineLength(), baseStyle.getRounding()));
 319             }
 320
 321
 322         } else {
 323             renderer = baseRenderer;
 324         }
 325
 326     }
 327
 328     @SyncField(value = {"pickTolerance"})
 329     public void setPickTolerance(double tolerance) {
 330         this.pickTolerance = tolerance;
 331     }
 332
 333     @SyncField(value = {"editable"})
 334     public void setEditable(boolean editable) {
 335         this.editable = editable;
 336     }
 337
 338     @SyncField(value = {"branchable"})
 339     public void setBranchable(boolean branchable) {
 340         this.branchable = branchable;
 341     }
 342
 343     public RouteGraph getRouteGraph() {
 344         return rg;
 345     }
 346
 347     public RouteGraphDelta getRouteGraphDelta() {
 348         return rgDelta;
 349     }
 350
 351     public IRouteGraphRenderer getRenderer() {
 352         return renderer;
 353     }
 354
 355     public boolean isEditable() {
 356         return editable;
 357     }
 358
 359     public boolean isBranchable() {
 360         return branchable;
 361     }
 362
 363     public double getPickTolerance() {
 364                 return pickTolerance;
 365         }
 366
 367     /**
 368      * When in client-server mode, listener is only set on the server side and
 369      * fireRouteGraphChanged will tell it when rg has changed.
 370      *
 371      * @param listener
 372      */
 373     public void setRouteGraphListener(IRouteGraphListener listener) {
 374         this.rgListener = listener;
 375     }
 376
 377     /**
 378      * @param before
 379      * @param after
 380      * @return <code>true</code> if changes were fired
 381      */
 382     private boolean setRouteGraphAndFireChanges(RouteGraph before, RouteGraph after) {
 383         RouteGraphDelta delta = new RouteGraphDelta(before, after);
 384         if (!delta.isEmpty()) {
 385             setRouteGraph(after);
 386             setRouteGraphDelta(delta);
 387             fireRouteGraphChanged(before, after, delta);
 388             return true;
 389         }
 390         return false;
 391     }
 392
 393     @ServerSide
 394     protected void fireRouteGraphChanged(RouteGraph before, RouteGraph after, RouteGraphDelta delta) {
 395         if (rgListener != null) {
 396             RouteGraphChangeEvent event = new RouteGraphChangeEvent(this, before, after, delta);
 397             rgListener.routeGraphChanged(event);
 398         }
 399     }
 400
 401     public void showBranchPoint(Point2D p) {
 402         newBranchPointPosition = p;
 403     }
 404
 405     @Override
 406     public void init() {
 407         super.init();
 408         addEventHandler(this);
 409     }
 410
 411     @Override
 412     public void cleanup() {
 413         rgListener = null;
 414         removeEventHandler(this);
 415         super.cleanup();
 416     }
 417
 418     protected boolean isSelected() {
 419         return NodeUtil.isSelected(this, 1);
 420     }
 421
 422     @Override
 423     public void render(Graphics2D g) {
 424         if (renderer == null)
 425             return;
 426
 427         AffineTransform ot = null;
 428         AffineTransform t = getTransform();
 429         if (t != null && !t.isIdentity()) {
 430             ot = g.getTransform();
 431             g.transform(getTransform());
 432         }
 433
 434         Object aaHint = g.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
 435         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
 436
 437         boolean selected = ignoreSelection ? false : NodeUtil.isSelected(this, 1);
 438
 439         rg.updateTerminals();
 440
 441         if (currentAction != null) {
 442             currentAction.render(g, renderer, mouseX, mouseY);
 443         } else {
 444             if (selected && selectionStroke != null) {
 445                 selectionPath.reset();
 446                 rg.getPath2D(selectionPath);
 447                 Shape selectionShape = selectionStroke.createStrokedShape(selectionPath);
 448                 g.setColor(SELECTION_COLOR);
 449                 g.fill(selectionShape);
 450             }
 451
 452             renderer.render(g, rg);
 453             if(selected)
 454                 renderer.renderGuides(g, rg);
 455
 456             if (selected && highlightActionsEnabled) {
 457                 // Needed for performing actions in #mouseClicked
 458                 this.lastViewTransform = g.getTransform();
 459                 highlightActions.setRouteGraph(rg);
 460                 highlightActions.render(g, renderer, mouseX, mouseY);
 461                 highlightActions.setRouteGraph(null);
 462             }
 463         }
 464
 465         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, aaHint);
 466
 467         if (editable && branchable && newBranchPointPosition != null && !Double.isNaN(newBranchPointPosition.getX())) {
 468             ConnectionStyle style = tryGetStyle();
 469             if(style != null)
 470                 style.drawBranchPoint(g, newBranchPointPosition.getX(), newBranchPointPosition.getY());
 471         }
 472
 473         if (ot != null)
 474             g.setTransform(ot);
 475     }
 476
 477     private BasicConnectionStyle tryGetStyle() {
 478         return tryGetStyle(renderer);
 479     }
 480
 481     private BasicConnectionStyle tryGetStyle(IRouteGraphRenderer renderer) {
 482         if (renderer instanceof StyledRouteGraphRenderer) {
 483             ConnectionStyle cs = ((StyledRouteGraphRenderer) renderer).getStyle();
 484             if (cs instanceof BasicConnectionStyle)
 485                 return (BasicConnectionStyle) cs;
 486         }
 487         return null;
 488     }
 489
 490     public double getSelectionStrokeWidth() {
 491         if (selectionStroke instanceof BasicStroke) {
 492             BasicStroke bs = (BasicStroke) selectionStroke;
 493             return bs.getLineWidth();
 494         }
 495         return 1.0;
 496     }
 497
 498     @Override
 499     public Rectangle2D getBoundsInLocal() {
 500         return bounds;
 501     }
 502
 503     protected void updateBounds() {
 504         Rectangle2D r = this.bounds;
 505         if (r == null)
 506             r = new Rectangle2D.Double();
 507         this.bounds = calculateBounds(r);
 508
 509         // Need to expand to take stroke width into account.
 510         double sw = getSelectionStrokeWidth() / 2;
 511         GeometryUtils.expandRectangle(this.bounds, sw, sw);
 512     }
 513
 514     protected Rectangle2D calculateBounds(Rectangle2D rect) {
 515         RouteGraph rg = this.rg;
 516         if (currentAction instanceof MoveAction)
 517             rg = ((MoveAction) currentAction).getRouteGraph();
 518         rg.getBounds(rect);
 519         return rect;
 520     }
 521
 522     protected void getMouseLocalPos(MouseEvent e) {
 523         //System.out.println("m: " + e.controlPosition);
 524         pt.setLocation(e.controlPosition);
 525         //System.out.println("parent: " + pt);
 526         pt = NodeUtil.worldToLocal(this, pt, pt);
 527         //System.out.println("local: " + pt);
 528         mouseX = pt.getX();
 529         mouseY = pt.getY();
 530     }
 531
 532     @Override
 533     protected boolean mouseDragged(MouseDragBegin e) {
 534         // Consume event if drag is possible.
 535         // PointerInteractor will call handleDrag with the MouseDragBegin event for the route line that is closest to the cursor.
 536         return currentAction != null;
 537     }
 538
 539     public boolean handleDrag(MouseDragBegin e) {
 540         if (dragAction != null && !e.hasAnyModifier(MouseEvent.ALL_MODIFIERS_MASK) && e.button == MouseEvent.LEFT_BUTTON) {
 541             currentAction = dragAction;
 542             dragAction = null;
 543         }
 544         return updateCurrentAction(e, true);
 545     }
 546
 547     @Override
 548     protected boolean mouseMoved(MouseMovedEvent e) {
 549         //System.out.println("mouse moved: " + e);
 550
 551         // Handle connection branching visualization.
 552         getMouseLocalPos(e);
 553         if (newBranchPointPosition == null && e.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK)) {
 554             if (bounds.contains(mouseX, mouseY)) {
 555                 newBranchPointPosition = new Point2D.Double(Double.NaN, Double.NaN);
 556             }
 557         }
 558         if (newBranchPointPosition != null) {
 559             RouteLine line = rg.pickLine(mouseX, mouseY, scaledPickTolerance());
 560             if (line != null) {
 561                 newBranchPointPosition.setLocation(mouseX, mouseY);
 562                 SplittedRouteGraph.snapToLine(newBranchPointPosition, line);
 563                 repaint();
 564             } else if (!Double.isNaN(newBranchPointPosition.getX())) {
 565                 newBranchPointPosition.setLocation(Double.NaN, Double.NaN);
 566                 repaint();
 567             }
 568         }
 569
 570         // Make sure that highlight action rendering is according to mouse hover.
 571         if (highlightActionsEnabled) {
 572             if (NodeUtil.isSelected(this, 1)) {
 573                 repaint();
 574             }
 575         }
 576
 577         return updateCurrentAction(e, false);
 578     }
 579
 580     protected boolean updateCurrentAction(MouseEvent e, boolean updateMousePos) {
 581         boolean oldHighlight = highlightActionsEnabled;
 582         highlightActionsEnabled = e.hasAllModifiers(MouseEvent.CTRL_MASK);
 583         if (oldHighlight != highlightActionsEnabled)
 584             repaint();
 585
 586         if (currentAction != null) {
 587             if (updateMousePos)
 588                 getMouseLocalPos(e);
 589             updateBounds();
 590
 591             // Repaint, but only if absolutely necessary.
 592             if (currentAction instanceof MoveAction || bounds.contains(mouseX, mouseY))
 593                 repaint();
 594
 595             return true;
 596         }
 597         return false;
 598     }
 599
 600     @Override
 601     protected boolean mouseClicked(MouseClickEvent e) {
 602         if (!editable)
 603             return false;
 604
 605         if (e.button == MouseEvent.LEFT_BUTTON) {
 606             if (isSelected() && highlightActionsEnabled) {
 607                 // Reconnection / segment deletion only available for branched connections.
 608                 if (rg.getTerminals().size() > 2) {
 609                     Pick pick = highlightActions.pickAction(rg, lastViewTransform, mouseX, mouseY);
 610                     if (pick.hasAction(Action.REMOVE)) {
 611                         RemoveLineAction remove = RemoveLineAction.perform(rg, pick.line.getLine(), mouseX, mouseY);
 612                         if (remove != null) {
 613                             setRouteGraphAndFireChanges(remove.getOriginalRouteGraph(), remove.getRouteGraph());
 614                             repaint();
 615                             return true;
 616                         }
 617                     }
 618                     if (pick.hasAction(Action.RECONNECT)) {
 619                         currentAction = ReconnectLineAction.create(rg, mouseX, mouseY);
 620                         if (currentAction != null) {
 621                             repaint();
 622                         }
 623                     }
 624                 }
 625             }
 626         }
 627
 628         return false;
 629     }
 630
 631     @Override
 632     protected boolean mouseButtonPressed(MouseButtonPressedEvent e) {
 633         if (!editable)
 634             return false;
 635
 636         if (e.button == MouseEvent.LEFT_BUTTON) {
 637             // Visualize new branch point no longer.
 638             newBranchPointPosition = null;
 639
 640             getMouseLocalPos(e);
 641             dragAction = null;
 642 //          if(currentAction instanceof HighlightActionPointsAction) {
 643 //              RemoveLineAction remove = RemoveLineAction.perform(rg, mouseX, mouseY);
 644 //              if (remove != null) {
 645 //                  setRouteGraphAndFireChanges(remove.getOriginalRouteGraph(), remove.getRouteGraph());
 646 //                  repaint();
 647 //              } else {
 648 //                  currentAction = ReconnectLineAction.create(rg, mouseX, mouseY);
 649 //                  if (currentAction != null)
 650 //                      repaint();
 651 //              }
 652 //          }
 653 //          else
 654             if(currentAction instanceof IReconnectAction) {
 655                 RouteGraph originalRg = rg.copy();
 656                 ((IReconnectAction)currentAction).finish(mouseX, mouseY);
 657                 currentAction = null;
 658
 659                 setRouteGraphAndFireChanges(originalRg, rg);
 660
 661                 currentAction = null;
 662                 repaint();
 663                 return true;
 664             }
 665             else {
 666                 if (!allowConnectionRerouting()) {
 667                     return false;
 668                 }
 669                 //System.out.println("move action");
 670                 dragAction = SnappingMoveAction.create(rg, mouseX, mouseY, scaledPickTolerance(), moveFilter, getSnapAdvisor());
 671                 //System.out.println("DRAG ACTION: " + dragAction);
 672             }
 673
 674             //System.out.println(this + " NEW action: " + currentAction);
 675             if (currentAction != null)
 676                 return true;
 677         }
 678         return false;
 679     }
 680
 681     private double scaledPickTolerance() {
 682         NavigationNode nn = NodeUtil.findNearestParentNode(this, NavigationNode.class);
 683         double scale = 1.0;
 684         if (nn != null) {
 685             scale = GeometryUtils.getScale(nn.getTransform());
 686         }
 687         double pickDistance = 0;
 688         G2DSceneGraph sg = NodeUtil.getRootNode(nn != null ? nn : this);
 689         if (sg != null) {
 690             pickDistance = sg.getGlobalProperty(G2DSceneGraph.PICK_DISTANCE, pickDistance);
 691         }
 692         return Math.max(getSelectionStrokeWidth() / 2.0, pickDistance / scale);
 693     }
 694
 695     /**
 696      * Checks the selections data node in the scene graph for any links
 697      * @return
 698      */
 699     private boolean allowConnectionRerouting() {
 700         final int maxOtherNodesSelected = 1;
 701
 702         INode selections = NodeUtil.tryLookup(this, "selections");
 703         if (!(selections instanceof G2DParentNode))
 704             return true;
 705         G2DParentNode p = (G2DParentNode) selections;
 706         for (IG2DNode selection : p.getNodes()) {
 707             if (!(selection instanceof G2DParentNode))
 708                 continue;
 709
 710             G2DParentNode sp = (G2DParentNode) selection;
 711             Collection<IG2DNode> links = sp.getNodes();
 712             if (links.isEmpty())
 713                 return true;
 714             int othersSelected = 0;
 715             for (IG2DNode link : links) {
 716                 if (link instanceof LinkNode) {
 717                     INode node = ((LinkNode) link).getDelegate();
 718                     if (!NodeUtil.isParentOf(node, this)) {
 719                         othersSelected++;
 720                         if (othersSelected > maxOtherNodesSelected)
 721                             return false;
 722                     }
 723                 }
 724             }
 725             if (othersSelected > maxOtherNodesSelected)
 726                 return false;
 727         }
 728         return true;
 729     }
 730
 731     protected ISnapAdvisor getSnapAdvisor() {
 732         GridNode grid = lookupNode(GridNode.GRID_NODE_ID, GridNode.class);
 733         return grid != null ? grid.getSnapAdvisor() : null;
 734     }
 735
 736     MoveAction.TargetFilter moveFilter = new MoveAction.TargetFilter() {
 737         @Override
 738         public boolean accept(Object target) {
 739             return (target instanceof RouteLine) || (target instanceof RouteLink);
 740         }
 741     };
 742
 743     @Override
 744     protected boolean handleCommand(CommandEvent e) {
 745         /*if (Commands.DELETE.equals(e.command)) {
 746             Object target = rg.pick(mouseX, mouseY, pickTolerance);
 747             return deleteTarget(target);
 748         } else if (Commands.SPLIT_CONNECTION.equals(e.command)) {
 749             Object target = rg.pick(mouseX, mouseY, pickTolerance);
 750             return splitTarget(target);
 751         } else */
 752         if (Commands.CANCEL.equals(e.command)) {
 753             return cancelCurrentAction();
 754         }
 755         return false;
 756     }
 757
 758     protected boolean mouseButtonReleased(MouseButtonReleasedEvent e) {
 759         if (currentAction instanceof MoveAction) {
 760             MoveAction move = (MoveAction) currentAction;
 761             RouteGraph originalRg = rg.copy();
 762             move.finish(mouseX, mouseY);
 763
 764             setRouteGraphAndFireChanges(originalRg, rg);
 765
 766             currentAction = null;
 767             repaint();
 768             return true;
 769         }
 770         return false;
 771     }
 772
 773     @Override
 774     protected boolean keyPressed(KeyPressedEvent e) {
 775         if (!editable)
 776             return false;
 777
 778         if (!e.hasAnyModifier(MouseEvent.ALL_MODIFIERS_MASK) && e.keyCode == KeyEvent.VK_S) {
 779             Object target = rg.pick(mouseX, mouseY, scaledPickTolerance(), RouteGraph.PICK_PERSISTENT_LINES | RouteGraph.PICK_TRANSIENT_LINES);
 780             return splitTarget(target);
 781         }
 782         else if (!e.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK | MouseEvent.CTRL_MASK) && (e.keyCode == KeyEvent.VK_R || e.keyCode == KeyEvent.VK_D)) {
 783             Object target = rg.pick(mouseX, mouseY, scaledPickTolerance(), RouteGraph.PICK_PERSISTENT_LINES);
 784             return deleteTarget(target);
 785         }
 786         else if (e.keyCode == KeyEvent.VK_ESCAPE) {
 787             return cancelCurrentAction();
 788         }
 789 //        else if (e.keyCode == KeyEvent.VK_D) {
 790 //            if (target instanceof RouteTerminal) {
 791 //                RouteTerminal terminal = (RouteTerminal) target;
 792 //                RouteGraph before = rg.copy();
 793 //                rg.toggleDirectLines(terminal);
 794 //                setRouteGraphAndFireChanges(before, rg);
 795 //                repaint();
 796 //            }
 797 //        }
 798 //        else if (target != null && e.getKeyCode() == KeyEvent.VK_P) {
 799 //            rg.print();
 800 //        }
 801         else if (e.keyCode == KeyEvent.VK_CONTROL) {
 802             highlightActionsEnabled = true;
 803             repaint();
 804         }
 805         else if (e.keyCode == KeyEvent.VK_ALT) {
 806             // Begin connection branching visualization.
 807             RouteLine line = rg.pickLine(mouseX, mouseY, scaledPickTolerance());
 808             if (branchable && line != null) {
 809                 newBranchPointPosition = new Point2D.Double(mouseX, mouseY);
 810                 SplittedRouteGraph.snapToLine(newBranchPointPosition, line);
 811                 repaint();
 812             }
 813         }
 814
 815         return false;
 816     }
 817
 818     @Override
 819     protected boolean keyReleased(KeyReleasedEvent e) {
 820         if (e.keyCode == KeyEvent.VK_ALT) {
 821             // End connection branching visualization.
 822             if (newBranchPointPosition != null) {
 823                 newBranchPointPosition = null;
 824                 repaint();
 825             }
 826         }
 827         if (e.keyCode == KeyEvent.VK_CONTROL) {
 828             highlightActionsEnabled = false;
 829             repaint();
 830         }
 831         return false;
 832     }
 833
 834
 835     private boolean cancelCurrentAction() {
 836         if (currentAction != null) {
 837             currentAction = null;
 838             repaint();
 839             return true;
 840         }
 841         return false;
 842     }
 843
 844     private boolean splitTarget(Object target) {
 845         if (target instanceof RouteLine) {
 846             RouteLine rLine = (RouteLine)target;
 847             RouteGraph before = rg.copy();
 848             rg.split(rLine, rLine.isHorizontal() ? mouseX : mouseY);
 849             setRouteGraphAndFireChanges(before, rg);
 850             repaint();
 851             return true;
 852         }
 853         return false;
 854     }
 855
 856     private boolean deleteTarget(Object target) {
 857         boolean changed = false;
 858         if (target instanceof RouteLine) {
 859             RouteLine line = (RouteLine) target;
 860             RouteGraph before = rg.copy();
 861             rg.merge(line);
 862             changed = setRouteGraphAndFireChanges(before, rg);
 863         }
 864         else if (target instanceof RouteLink) {
 865             RouteGraph before = rg.copy();
 866             rg.deleteCorner((RouteLink) target);
 867             changed = setRouteGraphAndFireChanges(before, rg);
 868         }
 869 //        else if (target instanceof RouteTerminal) {
 870 //            RouteGraph before = rg.copy();
 871 //            rg.remove((RouteTerminal) target);
 872 //            changed = setRouteGraphAndFireChanges(before, rg);
 873 //        }
 874         if (changed)
 875             repaint();
 876         return changed;
 877     }
 878
 879     /**
 880      * A version of MoveAction that snaps movements using the specified
 881      * ISnapAdvisor.
 882      */
 883     static class SnappingMoveAction extends MoveAction {
 884
 885         private ISnapAdvisor snapAdvisor;
 886         private Point2D      point = new Point2D.Double();
 887
 888         public SnappingMoveAction(RouteGraph rg, Object target, ISnapAdvisor snapAdvisor) {
 889             super(rg, target);
 890             this.snapAdvisor = snapAdvisor;
 891         }
 892
 893         protected void move(RouteGraph rg, Object target, double x, double y) {
 894             point.setLocation(x, y);
 895             snapAdvisor.snap(point);
 896             super.move(rg, target, point.getX(), point.getY());
 897         }
 898
 899         public static MoveAction create(RouteGraph rg, double x, double y, double tolerance, TargetFilter filter, ISnapAdvisor snapAdvisor) {
 900             Object target = rg.pick(x, y, tolerance, RouteGraph.PICK_LINES | RouteGraph.PICK_INTERIOR_POINTS);
 901             if (target != null && (filter == null || filter.accept(target))) {
 902                 if (snapAdvisor != null)
 903                     return new SnappingMoveAction(rg, target, snapAdvisor);
 904                 return new MoveAction(rg, target);
 905             }
 906             return null;
 907         }
 908
 909     }
 910
 911     @Override
 912     public int getEventMask() {
 913         return EventTypes.CommandMask | EventTypes.KeyMask | EventTypes.MouseMask;
 914     }
 915
 916 }