001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.actions.mapmode; 003 004import static org.openstreetmap.josm.gui.help.HelpUtil.ht; 005import static org.openstreetmap.josm.tools.I18n.marktr; 006import static org.openstreetmap.josm.tools.I18n.tr; 007 008import java.awt.BasicStroke; 009import java.awt.Color; 010import java.awt.Cursor; 011import java.awt.Graphics2D; 012import java.awt.Point; 013import java.awt.Rectangle; 014import java.awt.Stroke; 015import java.awt.event.ActionEvent; 016import java.awt.event.KeyEvent; 017import java.awt.event.MouseEvent; 018import java.awt.geom.AffineTransform; 019import java.awt.geom.GeneralPath; 020import java.awt.geom.Line2D; 021import java.awt.geom.NoninvertibleTransformException; 022import java.awt.geom.Point2D; 023import java.util.ArrayList; 024import java.util.Collection; 025import java.util.LinkedList; 026import java.util.List; 027import javax.swing.JCheckBoxMenuItem; 028import javax.swing.JMenuItem; 029 030import org.openstreetmap.josm.Main; 031import org.openstreetmap.josm.actions.JosmAction; 032import org.openstreetmap.josm.actions.MergeNodesAction; 033import org.openstreetmap.josm.command.AddCommand; 034import org.openstreetmap.josm.command.ChangeCommand; 035import org.openstreetmap.josm.command.Command; 036import org.openstreetmap.josm.command.MoveCommand; 037import org.openstreetmap.josm.command.SequenceCommand; 038import org.openstreetmap.josm.data.Bounds; 039import org.openstreetmap.josm.data.coor.EastNorth; 040import org.openstreetmap.josm.data.osm.Node; 041import org.openstreetmap.josm.data.osm.OsmPrimitive; 042import org.openstreetmap.josm.data.osm.Way; 043import org.openstreetmap.josm.data.osm.WaySegment; 044import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors; 045import org.openstreetmap.josm.gui.MainMenu; 046import org.openstreetmap.josm.gui.MapFrame; 047import org.openstreetmap.josm.gui.MapView; 048import org.openstreetmap.josm.gui.layer.Layer; 049import org.openstreetmap.josm.gui.layer.MapViewPaintable; 050import org.openstreetmap.josm.gui.layer.OsmDataLayer; 051import org.openstreetmap.josm.gui.util.KeyPressReleaseListener; 052import org.openstreetmap.josm.gui.util.GuiHelper; 053import org.openstreetmap.josm.gui.util.ModifierListener; 054import org.openstreetmap.josm.tools.Geometry; 055import org.openstreetmap.josm.tools.ImageProvider; 056import org.openstreetmap.josm.tools.Shortcut; 057 058/** 059 * Makes a rectangle from a line, or modifies a rectangle. 060 */ 061public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierListener { 062 063 enum Mode { extrude, translate, select, create_new, translate_node } 064 065 private Mode mode = Mode.select; 066 067 /** 068 * If {@code true}, when extruding create new node(s) even if segments are parallel. 069 */ 070 private boolean alwaysCreateNodes = false; 071 private boolean nodeDragWithoutCtrl; 072 073 private long mouseDownTime = 0; 074 private WaySegment selectedSegment = null; 075 private Node selectedNode = null; 076 private Color mainColor; 077 private Stroke mainStroke; 078 079 /** settings value whether shared nodes should be ignored or not */ 080 private boolean ignoreSharedNodes; 081 082 private boolean keepSegmentDirection; 083 084 /** 085 * drawing settings for helper lines 086 */ 087 private Color helperColor; 088 private Stroke helperStrokeDash; 089 private Stroke helperStrokeRA; 090 091 private Stroke oldLineStroke; 092 private double symbolSize; 093 /** 094 * Possible directions to move to. 095 */ 096 private List<ReferenceSegment> possibleMoveDirections; 097 098 099 /** 100 * Collection of nodes that is moved 101 */ 102 private ArrayList<Node> movingNodeList; 103 104 /** 105 * The direction that is currently active. 106 */ 107 private ReferenceSegment activeMoveDirection; 108 109 /** 110 * The position of the mouse cursor when the drag action was initiated. 111 */ 112 private Point initialMousePos; 113 /** 114 * The time which needs to pass between click and release before something 115 * counts as a move, in milliseconds 116 */ 117 private int initialMoveDelay = 200; 118 /** 119 * The minimal shift of mouse (in pixels) befire something counts as move 120 */ 121 private int initialMoveThreshold = 1; 122 123 /** 124 * The initial EastNorths of node1 and node2 125 */ 126 private EastNorth initialN1en; 127 private EastNorth initialN2en; 128 /** 129 * The new EastNorths of node1 and node2 130 */ 131 private EastNorth newN1en; 132 private EastNorth newN2en; 133 134 /** 135 * the command that performed last move. 136 */ 137 private MoveCommand moveCommand; 138 /** 139 * The command used for dual alignment movement. 140 * Needs to be separate, due to two nodes moving in different directions. 141 */ 142 private MoveCommand moveCommand2; 143 144 /** The cursor for the 'create_new' mode. */ 145 private final Cursor cursorCreateNew; 146 147 /** The cursor for the 'translate' mode. */ 148 private final Cursor cursorTranslate; 149 150 /** The cursor for the 'alwaysCreateNodes' submode. */ 151 private final Cursor cursorCreateNodes; 152 153 private static class ReferenceSegment { 154 public final EastNorth en; 155 public final EastNorth p1; 156 public final EastNorth p2; 157 public final boolean perpendicular; 158 159 public ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) { 160 this.en = en; 161 this.p1 = p1; 162 this.p2 = p2; 163 this.perpendicular = perpendicular; 164 } 165 166 @Override 167 public String toString() { 168 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + "]"; 169 } 170 } 171 172 // Dual alignment mode stuff 173 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */ 174 private boolean dualAlignEnabled; 175 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met. Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */ 176 private boolean dualAlignActive; 177 /** Dual alignment reference segments */ 178 private ReferenceSegment dualAlignSegment1, dualAlignSegment2; 179 /** {@code true}, if new segment was collapsed */ 180 private boolean dualAlignSegmentCollapsed = false; 181 // Dual alignment UI stuff 182 private final DualAlignChangeAction dualAlignChangeAction; 183 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem; 184 private final Shortcut dualAlignShortcut; 185 private boolean useRepeatedShortcut; 186 private boolean ignoreNextKeyRelease; 187 188 private class DualAlignChangeAction extends JosmAction { 189 public DualAlignChangeAction() { 190 super(tr("Dual alignment"), "mapmode/extrude/dualalign", 191 tr("Switch dual alignment mode while extruding"), null, false); 192 putValue("help", ht("/Action/Extrude#DualAlign")); 193 } 194 195 @Override 196 public void actionPerformed(ActionEvent e) { 197 toggleDualAlign(); 198 } 199 } 200 201 /** 202 * Creates a new ExtrudeAction 203 * @param mapFrame The MapFrame this action belongs to. 204 */ 205 public ExtrudeAction(MapFrame mapFrame) { 206 super(tr("Extrude"), "extrude/extrude", tr("Create areas"), 207 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT), 208 mapFrame, 209 ImageProvider.getCursor("normal", "rectangle")); 210 putValue("help", ht("/Action/Extrude")); 211 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus"); 212 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move"); 213 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall"); 214 215 dualAlignEnabled = false; 216 dualAlignChangeAction = new DualAlignChangeAction(); 217 dualAlignCheckboxMenuItem = addDualAlignMenuItem(); 218 dualAlignCheckboxMenuItem.getAction().setEnabled(false); 219 dualAlignCheckboxMenuItem.setState(dualAlignEnabled); 220 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign", 221 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE); 222 readPreferences(); // to show prefernces in table before entering the mode 223 } 224 225 @Override 226 public void destroy() { 227 super.destroy(); 228 dualAlignChangeAction.destroy(); 229 } 230 231 private JCheckBoxMenuItem addDualAlignMenuItem() { 232 int n = Main.main.menu.editMenu.getItemCount(); 233 for (int i = n-1; i>0; i--) { 234 JMenuItem item = Main.main.menu.editMenu.getItem(i); 235 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) { 236 Main.main.menu.editMenu.remove(i); 237 } 238 } 239 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE); 240 } 241 242 // ------------------------------------------------------------------------- 243 // Mode methods 244 // ------------------------------------------------------------------------- 245 246 @Override 247 public String getModeHelpText() { 248 StringBuilder rv; 249 if (mode == Mode.select) { 250 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " + 251 "Alt-drag to create a new rectangle, double click to add a new node.")); 252 if (dualAlignEnabled) { 253 rv.append(" ").append(tr("Dual alignment active.")); 254 if (dualAlignSegmentCollapsed) 255 rv.append(" ").append(tr("Segment collapsed due to its direction reversing.")); 256 } 257 } else { 258 if (mode == Mode.translate) 259 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button.")); 260 else if (mode == Mode.translate_node) 261 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button.")); 262 else if (mode == Mode.extrude) 263 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button.")); 264 else if (mode == Mode.create_new) 265 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button.")); 266 else { 267 Main.warn("Extrude: unknown mode " + mode); 268 rv = new StringBuilder(); 269 } 270 if (dualAlignActive) { 271 rv.append(" ").append(tr("Dual alignment active.")); 272 if (dualAlignSegmentCollapsed) { 273 rv.append(" ").append(tr("Segment collapsed due to its direction reversing.")); 274 } 275 } 276 } 277 return rv.toString(); 278 } 279 280 @Override 281 public boolean layerIsSupported(Layer l) { 282 return l instanceof OsmDataLayer; 283 } 284 285 @Override 286 public void enterMode() { 287 super.enterMode(); 288 Main.map.mapView.addMouseListener(this); 289 Main.map.mapView.addMouseMotionListener(this); 290 readPreferences(); 291 ignoreNextKeyRelease = true; 292 Main.map.keyDetector.addKeyListener(this); 293 Main.map.keyDetector.addModifierListener(this); 294 } 295 296 private void readPreferences() { 297 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay",200); 298 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1); 299 mainColor = Main.pref.getColor(marktr("Extrude: main line"), null); 300 if (mainColor == null) mainColor = PaintColors.SELECTED.get(); 301 helperColor = Main.pref.getColor(marktr("Extrude: helper line"), Color.ORANGE); 302 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4")); 303 helperStrokeRA = new BasicStroke(1); 304 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8); 305 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false); 306 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1")); 307 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3")); 308 309 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true); 310 dualAlignCheckboxMenuItem.getAction().setEnabled(true); 311 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true); 312 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true); 313 } 314 315 @Override 316 public void exitMode() { 317 Main.map.mapView.removeMouseListener(this); 318 Main.map.mapView.removeMouseMotionListener(this); 319 Main.map.mapView.removeTemporaryLayer(this); 320 dualAlignCheckboxMenuItem.getAction().setEnabled(false); 321 Main.map.keyDetector.removeKeyListener(this); 322 Main.map.keyDetector.removeModifierListener(this); 323 super.exitMode(); 324 } 325 326 // ------------------------------------------------------------------------- 327 // Event handlers 328 // ------------------------------------------------------------------------- 329 330 /** 331 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed, 332 */ 333 @Override 334 public void modifiersChanged(int modifiers) { 335 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable()) 336 return; 337 updateKeyModifiers(modifiers); 338 if (mode == Mode.select) { 339 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this); 340 } 341 }; 342 343 @Override 344 public void doKeyPressed(KeyEvent e) { 345 } 346 347 @Override 348 public void doKeyReleased(KeyEvent e) { 349 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e))) 350 return; 351 if (ignoreNextKeyRelease) { 352 ignoreNextKeyRelease = false; 353 } else { 354 toggleDualAlign(); 355 } 356 } 357 /** 358 * Toggles dual alignment mode. 359 */ 360 private void toggleDualAlign() { 361 dualAlignEnabled = !dualAlignEnabled; 362 dualAlignCheckboxMenuItem.setState(dualAlignEnabled); 363 updateStatusLine(); 364 } 365 366 /** 367 * If the left mouse button is pressed over a segment or a node, switches 368 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and 369 * {@link #dualAlignEnabled}. 370 * @param e 371 */ 372 @Override 373 public void mousePressed(MouseEvent e) { 374 if(!Main.map.mapView.isActiveLayerVisible()) 375 return; 376 if (!(Boolean)this.getValue("active")) 377 return; 378 if (e.getButton() != MouseEvent.BUTTON1) 379 return; 380 381 requestFocusInMapView(); 382 updateKeyModifiers(e); 383 384 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive.isSelectablePredicate); 385 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate); 386 387 // If nothing gets caught, stay in select mode 388 if (selectedSegment == null && selectedNode == null) return; 389 390 if (selectedNode != null) { 391 if (ctrl || nodeDragWithoutCtrl) { 392 movingNodeList = new ArrayList<>(); 393 movingNodeList.add(selectedNode); 394 calculatePossibleDirectionsByNode(); 395 if (possibleMoveDirections.isEmpty()) { 396 // if no directions fould, do not enter dragging mode 397 return; 398 } 399 mode = Mode.translate_node; 400 dualAlignActive = false; 401 } 402 } else { 403 // Otherwise switch to another mode 404 if (dualAlignEnabled && checkDualAlignConditions()) { 405 dualAlignActive = true; 406 calculatePossibleDirectionsForDualAlign(); 407 dualAlignSegmentCollapsed = false; 408 } else { 409 dualAlignActive = false; 410 calculatePossibleDirectionsBySegment(); 411 } 412 if (ctrl) { 413 mode = Mode.translate; 414 movingNodeList = new ArrayList<>(); 415 movingNodeList.add(selectedSegment.getFirstNode()); 416 movingNodeList.add(selectedSegment.getSecondNode()); 417 } else if (alt) { 418 mode = Mode.create_new; 419 // create a new segment and then select and extrude the new segment 420 getCurrentDataSet().setSelected(selectedSegment.way); 421 alwaysCreateNodes = true; 422 } else { 423 mode = Mode.extrude; 424 getCurrentDataSet().setSelected(selectedSegment.way); 425 alwaysCreateNodes = shift; 426 } 427 } 428 429 // Signifies that nothing has happened yet 430 newN1en = null; 431 newN2en = null; 432 moveCommand = null; 433 moveCommand2 = null; 434 435 Main.map.mapView.addTemporaryLayer(this); 436 437 updateStatusLine(); 438 Main.map.mapView.repaint(); 439 440 // Make note of time pressed 441 mouseDownTime = System.currentTimeMillis(); 442 443 // Make note of mouse position 444 initialMousePos = e.getPoint(); 445 } 446 447 /** 448 * Performs action depending on what {@link #mode} we're in. 449 * @param e 450 */ 451 @Override 452 public void mouseDragged(MouseEvent e) { 453 if(!Main.map.mapView.isActiveLayerVisible()) 454 return; 455 456 // do not count anything as a drag if it lasts less than 100 milliseconds. 457 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay) 458 return; 459 460 if (mode == Mode.select) { 461 // Just sit tight and wait for mouse to be released. 462 } else { 463 //move, create new and extrude mode - move the selected segment 464 465 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y); 466 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn); 467 468 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this); 469 470 if (dualAlignActive) { 471 if (mode == Mode.extrude || mode == Mode.create_new) { 472 // nothing here 473 } else if (mode == Mode.translate) { 474 EastNorth movement1 = initialN1en.sub(newN1en); 475 EastNorth movement2 = initialN2en.sub(newN2en); 476 // move nodes to new position 477 if (moveCommand == null || moveCommand2 == null) { 478 // make a new move commands 479 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY()); 480 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY()); 481 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2); 482 Main.main.undoRedo.add(c); 483 } else { 484 // reuse existing move commands 485 moveCommand.moveAgainTo(movement1.getX(), movement1.getY()); 486 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY()); 487 } 488 } 489 } else { 490 if (mode == Mode.extrude || mode == Mode.create_new) { 491 //nothing here 492 } else if (mode == Mode.translate_node || mode == Mode.translate) { 493 //move nodes to new position 494 if (moveCommand == null) { 495 //make a new move command 496 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement); 497 Main.main.undoRedo.add(moveCommand); 498 } else { 499 //reuse existing move command 500 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY()); 501 } 502 } 503 } 504 505 Main.map.mapView.repaint(); 506 } 507 } 508 509 /** 510 * Does anything that needs to be done, then switches back to select mode. 511 * @param e 512 */ 513 @Override 514 public void mouseReleased(MouseEvent e) { 515 516 if(!Main.map.mapView.isActiveLayerVisible()) 517 return; 518 519 if (mode == Mode.select) { 520 // Nothing to be done 521 } else { 522 if (mode == Mode.create_new) { 523 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) { 524 createNewRectangle(); 525 } 526 } else if (mode == Mode.extrude) { 527 if( e.getClickCount() == 2 && e.getPoint().equals(initialMousePos) ) { 528 // double click adds a new node 529 addNewNode(e); 530 } 531 else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) { 532 // main extrusion commands 533 performExtrusion(); 534 } 535 } else if (mode == Mode.translate || mode == Mode.translate_node) { 536 //Commit translate 537 //the move command is already committed in mouseDragged 538 joinNodesIfCollapsed(movingNodeList); 539 } 540 541 updateKeyModifiers(e); 542 // Switch back into select mode 543 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this); 544 Main.map.mapView.removeTemporaryLayer(this); 545 selectedSegment = null; 546 moveCommand = null; 547 mode = Mode.select; 548 dualAlignSegmentCollapsed = false; 549 updateStatusLine(); 550 Main.map.mapView.repaint(); 551 } 552 } 553 554 // ------------------------------------------------------------------------- 555 // Custom methods 556 // ------------------------------------------------------------------------- 557 558 /** 559 * Inserts node into nearby segment. 560 * @param e current mouse point 561 */ 562 private void addNewNode(MouseEvent e) { 563 // Should maybe do the same as in DrawAction and fetch all nearby segments? 564 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate); 565 if (ws != null) { 566 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY())); 567 EastNorth A = ws.getFirstNode().getEastNorth(); 568 EastNorth B = ws.getSecondNode().getEastNorth(); 569 n.setEastNorth(Geometry.closestPointToSegment(A, B, n.getEastNorth())); 570 Way wnew = new Way(ws.way); 571 wnew.addNode(ws.lowerIndex+1, n); 572 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"), 573 new AddCommand(n), new ChangeCommand(ws.way, wnew)); 574 Main.main.undoRedo.add(cmds); 575 } 576 } 577 578 /** 579 * Creates a new way that shares segment with selected way. 580 */ 581 private void createNewRectangle() { 582 if (selectedSegment == null) return; 583 // crete a new rectangle 584 Collection<Command> cmds = new LinkedList<>(); 585 Node third = new Node(newN2en); 586 Node fourth = new Node(newN1en); 587 Way wnew = new Way(); 588 wnew.addNode(selectedSegment.getFirstNode()); 589 wnew.addNode(selectedSegment.getSecondNode()); 590 wnew.addNode(third); 591 if (!dualAlignSegmentCollapsed) { 592 // rectangle can degrade to triangle for dual alignment after collapsing 593 wnew.addNode(fourth); 594 } 595 // ... and close the way 596 wnew.addNode(selectedSegment.getFirstNode()); 597 // undo support 598 cmds.add(new AddCommand(third)); 599 if (!dualAlignSegmentCollapsed) { 600 cmds.add(new AddCommand(fourth)); 601 } 602 cmds.add(new AddCommand(wnew)); 603 Command c = new SequenceCommand(tr("Extrude Way"), cmds); 604 Main.main.undoRedo.add(c); 605 getCurrentDataSet().setSelected(wnew); 606 } 607 608 /** 609 * Does actual extrusion of {@link #selectedSegment}. 610 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call 611 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes} 612 */ 613 private void performExtrusion() { 614 // create extrusion 615 Collection<Command> cmds = new LinkedList<>(); 616 Way wnew = new Way(selectedSegment.way); 617 boolean wayWasModified = false; 618 boolean wayWasSingleSegment = wnew.getNodesCount() == 2; 619 int insertionPoint = selectedSegment.lowerIndex + 1; 620 621 //find if the new points overlap existing segments (in case of 90 degree angles) 622 Node prevNode = getPreviousNode(selectedSegment.lowerIndex); 623 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en); 624 // segmentAngleZero marks subset of nodeOverlapsSegment. nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0 625 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5; 626 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way); 627 ArrayList<Node> changedNodes = new ArrayList<>(); 628 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) { 629 //move existing node 630 Node n1Old = selectedSegment.getFirstNode(); 631 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en))); 632 changedNodes.add(n1Old); 633 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) { 634 // replace shared node with new one 635 Node n1Old = selectedSegment.getFirstNode(); 636 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en)); 637 wnew.addNode(insertionPoint, n1New); 638 wnew.removeNode(n1Old); 639 wayWasModified = true; 640 cmds.add(new AddCommand(n1New)); 641 changedNodes.add(n1New); 642 } else { 643 //introduce new node 644 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en)); 645 wnew.addNode(insertionPoint, n1New); 646 wayWasModified = true; 647 insertionPoint ++; 648 cmds.add(new AddCommand(n1New)); 649 changedNodes.add(n1New); 650 } 651 652 //find if the new points overlap existing segments (in case of 90 degree angles) 653 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1); 654 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en); 655 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5; 656 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way); 657 658 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) { 659 //move existing node 660 Node n2Old = selectedSegment.getSecondNode(); 661 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en))); 662 changedNodes.add(n2Old); 663 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) { 664 // replace shared node with new one 665 Node n2Old = selectedSegment.getSecondNode(); 666 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en)); 667 wnew.addNode(insertionPoint, n2New); 668 wnew.removeNode(n2Old); 669 wayWasModified = true; 670 cmds.add(new AddCommand(n2New)); 671 changedNodes.add(n2New); 672 } else { 673 //introduce new node 674 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en)); 675 wnew.addNode(insertionPoint, n2New); 676 wayWasModified = true; 677 insertionPoint ++; 678 cmds.add(new AddCommand(n2New)); 679 changedNodes.add(n2New); 680 } 681 682 //the way was a single segment, close the way 683 if (wayWasSingleSegment) { 684 wnew.addNode(selectedSegment.getFirstNode()); 685 wayWasModified = true; 686 } 687 if (wayWasModified) { 688 // we only need to change the way if its node list was really modified 689 cmds.add(new ChangeCommand(selectedSegment.way, wnew)); 690 } 691 Command c = new SequenceCommand(tr("Extrude Way"), cmds); 692 Main.main.undoRedo.add(c); 693 joinNodesIfCollapsed(changedNodes); 694 } 695 696 private void joinNodesIfCollapsed(List<Node> changedNodes) { 697 if (!dualAlignActive || newN1en == null || newN2en == null) return; 698 if (newN1en.distance(newN2en) > 1e-6) return; 699 // If the dual alignment moved two nodes to the same point, merge them 700 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes); 701 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes); 702 Command mergeCmd = MergeNodesAction.mergeNodes(Main.main.getEditLayer(), changedNodes, targetNode, locNode); 703 if (mergeCmd!=null) { 704 Main.main.undoRedo.add(mergeCmd); 705 } else { 706 // undo extruding command itself 707 Main.main.undoRedo.undo(); 708 } 709 } 710 711 /** 712 * This method tests if {@code node} has other ways apart from the given one. 713 * @param node 714 * @param myWay 715 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways. 716 */ 717 private static boolean hasNodeOtherWays(Node node, Way myWay) { 718 for (OsmPrimitive p : node.getReferrers()) { 719 if (p instanceof Way && p.isUsable() && p != myWay) 720 return true; 721 } 722 return false; 723 } 724 725 /** 726 * Determines best movement from {@link #initialMousePos} to current mouse position, 727 * choosing one of the directions from {@link #possibleMoveDirections}. 728 * @param mouseEn current mouse position 729 * @return movement vector 730 */ 731 private EastNorth calculateBestMovement(EastNorth mouseEn) { 732 733 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y); 734 EastNorth mouseMovement = initialMouseEn.sub(mouseEn); 735 736 double bestDistance = Double.POSITIVE_INFINITY; 737 EastNorth bestMovement = null; 738 activeMoveDirection = null; 739 740 //find the best movement direction and vector 741 for (ReferenceSegment direction : possibleMoveDirections) { 742 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn); 743 if (movement == null) { 744 //if direction parallel to segment. 745 continue; 746 } 747 748 double distanceFromMouseMovement = movement.distance(mouseMovement); 749 if (bestDistance > distanceFromMouseMovement) { 750 bestDistance = distanceFromMouseMovement; 751 activeMoveDirection = direction; 752 bestMovement = movement; 753 } 754 } 755 return bestMovement; 756 757 758 } 759 760 /*** 761 * This method calculates offset amount by which to move the given segment 762 * perpendicularly for it to be in line with mouse position. 763 * @param segmentP1 segment's first point 764 * @param segmentP2 segment's second point 765 * @param moveDirection direction of movement 766 * @param targetPos mouse position 767 * @return offset amount of P1 and P2. 768 */ 769 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection, 770 EastNorth targetPos) { 771 EastNorth intersectionPoint; 772 if (segmentP1.distanceSq(segmentP2)>1e-7) { 773 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection)); 774 } else { 775 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1); 776 } 777 778 if (intersectionPoint == null) 779 return null; 780 else 781 //return distance form base to target position 782 return intersectionPoint.sub(targetPos); 783 } 784 785 /** 786 * Gathers possible move directions - perpendicular to the selected segment 787 * and parallel to neighboring segments. 788 */ 789 private void calculatePossibleDirectionsBySegment() { 790 // remember initial positions for segment nodes. 791 initialN1en = selectedSegment.getFirstNode().getEastNorth(); 792 initialN2en = selectedSegment.getSecondNode().getEastNorth(); 793 794 //add direction perpendicular to the selected segment 795 possibleMoveDirections = new ArrayList<>(); 796 possibleMoveDirections.add(new ReferenceSegment(new EastNorth( 797 initialN1en.getY() - initialN2en.getY(), 798 initialN2en.getX() - initialN1en.getX() 799 ), initialN1en, initialN2en, true)); 800 801 802 //add directions parallel to neighbor segments 803 Node prevNode = getPreviousNode(selectedSegment.lowerIndex); 804 if (prevNode != null) { 805 EastNorth en = prevNode.getEastNorth(); 806 possibleMoveDirections.add(new ReferenceSegment(new EastNorth( 807 initialN1en.getX() - en.getX(), 808 initialN1en.getY() - en.getY() 809 ), initialN1en, en, false)); 810 } 811 812 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1); 813 if (nextNode != null) { 814 EastNorth en = nextNode.getEastNorth(); 815 possibleMoveDirections.add(new ReferenceSegment(new EastNorth( 816 initialN2en.getX() - en.getX(), 817 initialN2en.getY() - en.getY() 818 ), initialN2en, en, false)); 819 } 820 } 821 822 /** 823 * Gathers possible move directions - along all adjacent segments. 824 */ 825 private void calculatePossibleDirectionsByNode() { 826 // remember initial positions for segment nodes. 827 initialN1en = selectedNode.getEastNorth(); 828 initialN2en = initialN1en; 829 possibleMoveDirections = new ArrayList<>(); 830 for (OsmPrimitive p: selectedNode.getReferrers()) { 831 if (p instanceof Way && p.isUsable()) { 832 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) { 833 EastNorth en = neighbor.getEastNorth(); 834 possibleMoveDirections.add(new ReferenceSegment(new EastNorth( 835 initialN1en.getX() - en.getX(), 836 initialN1en.getY() - en.getY() 837 ), initialN1en, en, false)); 838 } 839 } 840 } 841 } 842 843 /** 844 * Checks dual alignment conditions: 845 * 1. selected segment has both neighboring segments, 846 * 2. selected segment is not parallel with neighboring segments. 847 * @return {@code true} if dual alignment conditions are satisfied 848 */ 849 private boolean checkDualAlignConditions() { 850 Node prevNode = getPreviousNode(selectedSegment.lowerIndex); 851 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1); 852 if (prevNode == null || nextNode == null) { 853 return false; 854 } 855 856 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth(); 857 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth(); 858 if (n1en.distance(prevNode.getEastNorth())<1e-4 || 859 n2en.distance(nextNode.getEastNorth())<1e-4 ) { 860 return false; 861 } 862 863 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en); 864 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en); 865 if (prevSegmentParallel || nextSegmentParallel) { 866 return false; 867 } 868 869 return true; 870 } 871 872 /** 873 * Gathers possible move directions - perpendicular to the selected segment only. 874 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}. 875 */ 876 private void calculatePossibleDirectionsForDualAlign() { 877 // remember initial positions for segment nodes. 878 initialN1en = selectedSegment.getFirstNode().getEastNorth(); 879 initialN2en = selectedSegment.getSecondNode().getEastNorth(); 880 881 // add direction perpendicular to the selected segment 882 possibleMoveDirections = new ArrayList<ReferenceSegment>(); 883 possibleMoveDirections.add(new ReferenceSegment(new EastNorth( 884 initialN1en.getY() - initialN2en.getY(), 885 initialN2en.getX() - initialN1en.getX() 886 ), initialN1en, initialN2en, true)); 887 888 // set neighboring segments 889 Node prevNode = getPreviousNode(selectedSegment.lowerIndex); 890 EastNorth prevNodeEn = prevNode.getEastNorth(); 891 dualAlignSegment1 = new ReferenceSegment(new EastNorth( 892 initialN1en.getX() - prevNodeEn.getX(), 893 initialN1en.getY() - prevNodeEn.getY() 894 ), initialN1en, prevNodeEn, false); 895 896 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1); 897 EastNorth nextNodeEn = nextNode.getEastNorth(); 898 dualAlignSegment2 = new ReferenceSegment(new EastNorth( 899 initialN2en.getX() - nextNodeEn.getX(), 900 initialN2en.getY() - nextNodeEn.getY() 901 ), initialN2en, nextNodeEn, false); 902 } 903 904 /** 905 * Calculate newN1en, newN2en best suitable for given mouse coordinates 906 * For dual align, calculates positions of new nodes, aligning them to neighboring segments. 907 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}. 908 * @return best movement vector 909 */ 910 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) { 911 EastNorth bestMovement = calculateBestMovement(mouseEn); 912 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn; 913 914 // find out the movement distance, in metres 915 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(Main.getProjection().eastNorth2latlon(n1movedEn)); 916 Main.map.statusLine.setDist(distance); 917 updateStatusLine(); 918 919 if (dualAlignActive) { 920 // new positions of selected segment's nodes, without applying dual alignment 921 n1movedEn = initialN1en.add(bestMovement); 922 n2movedEn = initialN2en.add(bestMovement); 923 924 // calculate intersections of parallel shifted segment and the adjacent lines 925 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2); 926 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2); 927 if (newN1en == null || newN2en == null) return bestMovement; 928 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) { 929 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2, dualAlignSegment2.p1, dualAlignSegment2.p2); 930 newN1en = collapsedSegmentPosition; 931 newN2en = collapsedSegmentPosition; 932 dualAlignSegmentCollapsed = true; 933 } else { 934 dualAlignSegmentCollapsed = false; 935 } 936 } else { 937 newN1en = n1movedEn; 938 newN2en = initialN2en.add(bestMovement); 939 } 940 return bestMovement; 941 } 942 943 /** 944 * Gets a node index from selected way before given index. 945 * @param index index of current node 946 * @return index of previous node or <code>-1</code> if there are no nodes there. 947 */ 948 private int getPreviousNodeIndex(int index) { 949 if (index > 0) 950 return index - 1; 951 else if (selectedSegment.way.isClosed()) 952 return selectedSegment.way.getNodesCount() - 2; 953 else 954 return -1; 955 } 956 957 /** 958 * Gets a node from selected way before given index. 959 * @param index index of current node 960 * @return previous node or <code>null</code> if there are no nodes there. 961 */ 962 private Node getPreviousNode(int index) { 963 int indexPrev = getPreviousNodeIndex(index); 964 if (indexPrev >= 0) 965 return selectedSegment.way.getNode(indexPrev); 966 else 967 return null; 968 } 969 970 971 /** 972 * Gets a node index from selected way after given index. 973 * @param index index of current node 974 * @return index of next node or <code>-1</code> if there are no nodes there. 975 */ 976 private int getNextNodeIndex(int index) { 977 int count = selectedSegment.way.getNodesCount(); 978 if (index < count - 1) 979 return index + 1; 980 else if (selectedSegment.way.isClosed()) 981 return 1; 982 else 983 return -1; 984 } 985 986 /** 987 * Gets a node from selected way after given index. 988 * @param index index of current node 989 * @return next node or <code>null</code> if there are no nodes there. 990 */ 991 private Node getNextNode(int index) { 992 int indexNext = getNextNodeIndex(index); 993 if (indexNext >= 0) 994 return selectedSegment.way.getNode(indexNext); 995 else 996 return null; 997 } 998 999 // ------------------------------------------------------------------------- 1000 // paint methods 1001 // ------------------------------------------------------------------------- 1002 1003 @Override 1004 public void paint(Graphics2D g, MapView mv, Bounds box) { 1005 Graphics2D g2 = g; 1006 if (mode == Mode.select) { 1007 // Nothing to do 1008 } else { 1009 if (newN1en != null) { 1010 1011 Point p1 = mv.getPoint(initialN1en); 1012 Point p2 = mv.getPoint(initialN2en); 1013 Point p3 = mv.getPoint(newN1en); 1014 Point p4 = mv.getPoint(newN2en); 1015 1016 Point2D normalUnitVector = getNormalUniVector(); 1017 1018 if (mode == Mode.extrude || mode == Mode.create_new) { 1019 g2.setColor(mainColor); 1020 g2.setStroke(mainStroke); 1021 // Draw rectangle around new area. 1022 GeneralPath b = new GeneralPath(); 1023 b.moveTo(p1.x, p1.y); b.lineTo(p3.x, p3.y); 1024 b.lineTo(p4.x, p4.y); b.lineTo(p2.x, p2.y); 1025 b.lineTo(p1.x, p1.y); 1026 g2.draw(b); 1027 1028 if (dualAlignActive) { 1029 // Draw reference ways 1030 drawReferenceSegment(g2, mv, dualAlignSegment1); 1031 drawReferenceSegment(g2, mv, dualAlignSegment2); 1032 } else if (activeMoveDirection != null) { 1033 // Draw reference way 1034 drawReferenceSegment(g2, mv, activeMoveDirection); 1035 1036 // Draw right angle marker on first node position, only when moving at right angle 1037 if (activeMoveDirection.perpendicular) { 1038 // mirror RightAngle marker, so it is inside the extrude 1039 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2); 1040 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX()); 1041 double headingDiff = headingRefWS - headingMoveDir; 1042 if (headingDiff < 0) headingDiff += 2 * Math.PI; 1043 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5; 1044 Point pr1 = mv.getPoint(activeMoveDirection.p1); 1045 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA); 1046 } 1047 } 1048 } else if (mode == Mode.translate || mode == Mode.translate_node) { 1049 g2.setColor(mainColor); 1050 if (p1.distance(p2) < 3) { 1051 g2.setStroke(mainStroke); 1052 g2.drawOval((int)(p1.x-symbolSize/2), (int)(p1.y-symbolSize/2), 1053 (int)(symbolSize), (int)(symbolSize)); 1054 } else { 1055 Line2D oldline = new Line2D.Double(p1, p2); 1056 g2.setStroke(oldLineStroke); 1057 g2.draw(oldline); 1058 } 1059 1060 if (dualAlignActive) { 1061 // Draw reference ways 1062 drawReferenceSegment(g2, mv, dualAlignSegment1); 1063 drawReferenceSegment(g2, mv, dualAlignSegment2); 1064 } else if (activeMoveDirection != null) { 1065 1066 g2.setColor(helperColor); 1067 g2.setStroke(helperStrokeDash); 1068 // Draw a guideline along the normal. 1069 Line2D normline; 1070 Point2D centerpoint = new Point2D.Double((p1.getX()+p2.getX())*0.5, (p1.getY()+p2.getY())*0.5); 1071 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2); 1072 g2.draw(normline); 1073 // Draw right angle marker on initial position, only when moving at right angle 1074 if (activeMoveDirection.perpendicular) { 1075 // EastNorth units per pixel 1076 g2.setStroke(helperStrokeRA); 1077 g2.setColor(mainColor); 1078 drawAngleSymbol(g2, centerpoint, normalUnitVector, false); 1079 } 1080 } 1081 } 1082 } 1083 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings 1084 } 1085 } 1086 1087 private Point2D getNormalUniVector() { 1088 double fac = 1.0 / activeMoveDirection.en.length(); 1089 // mult by factor to get unit vector. 1090 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac); 1091 1092 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector. 1093 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0 1094 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) { 1095 // If not, use a sign-flipped version of the normalUnitVector. 1096 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY()); 1097 } 1098 1099 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up. 1100 //This is normally done by MapView.getPoint, but it does not work on vectors. 1101 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY()); 1102 return normalUnitVector; 1103 } 1104 1105 /** 1106 * Returns true if from1-to1 and from2-to2 vertors directions are opposite 1107 */ 1108 private boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) { 1109 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX()) 1110 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0; 1111 } 1112 1113 /** 1114 * Draws right angle symbol at specified position. 1115 * @param g2 the Graphics2D object used to draw on 1116 * @param center center point of angle 1117 * @param normal vector of normal 1118 * @param mirror {@code true} if symbol should be mirrored by the normal 1119 */ 1120 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) { 1121 // EastNorth units per pixel 1122 double factor = 1.0/g2.getTransform().getScaleX(); 1123 double raoffsetx = symbolSize*factor*normal.getX(); 1124 double raoffsety = symbolSize*factor*normal.getY(); 1125 1126 double cx = center.getX(), cy = center.getY(); 1127 double k = (mirror ? -1 : 1); 1128 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety); 1129 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k); 1130 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k); 1131 1132 GeneralPath ra = new GeneralPath(); 1133 ra.moveTo((float)ra1.getX(), (float)ra1.getY()); 1134 ra.lineTo((float)ra2.getX(), (float)ra2.getY()); 1135 ra.lineTo((float)ra3.getX(), (float)ra3.getY()); 1136 g2.setStroke(helperStrokeRA); 1137 g2.draw(ra); 1138 } 1139 1140 /** 1141 * Draws given reference segment. 1142 * @param g2 the Graphics2D object used to draw on 1143 * @param mv 1144 * @param p1en segment's first point 1145 * @param p2en segment's second point 1146 */ 1147 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) 1148 { 1149 Point p1 = mv.getPoint(seg.p1); 1150 Point p2 = mv.getPoint(seg.p2); 1151 GeneralPath b = new GeneralPath(); 1152 b.moveTo(p1.x, p1.y); 1153 b.lineTo(p2.x, p2.y); 1154 g2.setColor(helperColor); 1155 g2.setStroke(helperStrokeDash); 1156 g2.draw(b); 1157 } 1158 1159 /** 1160 * Creates a new Line that extends off the edge of the viewport in one direction 1161 * @param start The start point of the line 1162 * @param unitvector A unit vector denoting the direction of the line 1163 * @param g the Graphics2D object it will be used on 1164 * @return created line 1165 */ 1166 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) { 1167 Rectangle bounds = g.getDeviceConfiguration().getBounds(); 1168 try { 1169 AffineTransform invtrans = g.getTransform().createInverse(); 1170 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width,0), null); 1171 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0,bounds.height), null); 1172 1173 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what 1174 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances. 1175 // This can be used as a safe length of line to generate which will always go off-viewport. 1176 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY()) + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY()); 1177 1178 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength) , start.getY() + (unitvector.getY() * linelength))); 1179 } 1180 catch (NoninvertibleTransformException e) { 1181 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10) , start.getY() + (unitvector.getY() * 10))); 1182 } 1183 } 1184}