source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 17333

Last change on this file since 17333 was 17333, checked in by Don-vip, 3 years ago

see #20129 - Fix typos and misspellings in the code (patch by gaben)
  • Property svn:eol-style set to native
File size: 51.4 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.actions.mapmode;
3
4import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
5import static org.openstreetmap.josm.tools.I18n.marktr;
6import static org.openstreetmap.josm.tools.I18n.tr;
7
8import java.awt.BasicStroke;
9import java.awt.Color;
10import java.awt.Cursor;
11import java.awt.Graphics2D;
12import java.awt.Point;
13import java.awt.Rectangle;
14import java.awt.Stroke;
15import java.awt.event.ActionEvent;
16import java.awt.event.KeyEvent;
17import java.awt.event.MouseEvent;
18import java.awt.geom.AffineTransform;
19import java.awt.geom.GeneralPath;
20import java.awt.geom.Line2D;
21import java.awt.geom.NoninvertibleTransformException;
22import java.awt.geom.Point2D;
23import java.util.ArrayList;
24import java.util.Collection;
25import java.util.LinkedList;
26import java.util.List;
27
28import javax.swing.JCheckBoxMenuItem;
29
30import org.openstreetmap.josm.actions.JosmAction;
31import org.openstreetmap.josm.actions.MergeNodesAction;
32import org.openstreetmap.josm.command.AddCommand;
33import org.openstreetmap.josm.command.ChangeNodesCommand;
34import org.openstreetmap.josm.command.Command;
35import org.openstreetmap.josm.command.MoveCommand;
36import org.openstreetmap.josm.command.SequenceCommand;
37import org.openstreetmap.josm.data.Bounds;
38import org.openstreetmap.josm.data.UndoRedoHandler;
39import org.openstreetmap.josm.data.coor.EastNorth;
40import org.openstreetmap.josm.data.osm.DataIntegrityProblemException;
41import org.openstreetmap.josm.data.osm.DataSet;
42import org.openstreetmap.josm.data.osm.Node;
43import org.openstreetmap.josm.data.osm.OsmPrimitive;
44import org.openstreetmap.josm.data.osm.Way;
45import org.openstreetmap.josm.data.osm.WaySegment;
46import org.openstreetmap.josm.data.preferences.NamedColorProperty;
47import org.openstreetmap.josm.data.projection.ProjectionRegistry;
48import org.openstreetmap.josm.gui.MainApplication;
49import org.openstreetmap.josm.gui.MainMenu;
50import org.openstreetmap.josm.gui.MapFrame;
51import org.openstreetmap.josm.gui.MapView;
52import org.openstreetmap.josm.gui.draw.MapViewPath;
53import org.openstreetmap.josm.gui.draw.SymbolShape;
54import org.openstreetmap.josm.gui.layer.Layer;
55import org.openstreetmap.josm.gui.layer.MapViewPaintable;
56import org.openstreetmap.josm.gui.util.GuiHelper;
57import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
58import org.openstreetmap.josm.gui.util.ModifierExListener;
59import org.openstreetmap.josm.spi.preferences.Config;
60import org.openstreetmap.josm.tools.Geometry;
61import org.openstreetmap.josm.tools.ImageProvider;
62import org.openstreetmap.josm.tools.Logging;
63import org.openstreetmap.josm.tools.Shortcut;
64
65/**
66 * Makes a rectangle from a line, or modifies a rectangle.
67 */
68public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierExListener {
69
70 enum Mode { extrude, translate, select, create_new, translate_node }
71
72 private Mode mode = Mode.select;
73
74 /**
75 * If {@code true}, when extruding create new node(s) even if segments are parallel.
76 */
77 private boolean alwaysCreateNodes;
78 private boolean nodeDragWithoutCtrl;
79
80 private long mouseDownTime;
81 private transient WaySegment selectedSegment;
82 private transient Node selectedNode;
83 private Color mainColor;
84 private transient Stroke mainStroke;
85
86 /** settings value whether shared nodes should be ignored or not */
87 private boolean ignoreSharedNodes;
88
89 private boolean keepSegmentDirection;
90
91 /**
92 * drawing settings for helper lines
93 */
94 private Color helperColor;
95 private transient Stroke helperStrokeDash;
96 private transient Stroke helperStrokeRA;
97
98 private transient Stroke oldLineStroke;
99 private double symbolSize;
100 /**
101 * Possible directions to move to.
102 */
103 private transient List<ReferenceSegment> possibleMoveDirections;
104
105
106 /**
107 * Collection of nodes that is moved
108 */
109 private transient List<Node> movingNodeList;
110
111 /**
112 * The direction that is currently active.
113 */
114 private transient ReferenceSegment activeMoveDirection;
115
116 /**
117 * The position of the mouse cursor when the drag action was initiated.
118 */
119 private Point initialMousePos;
120 /**
121 * The time which needs to pass between click and release before something
122 * counts as a move, in milliseconds
123 */
124 private int initialMoveDelay = 200;
125 /**
126 * The minimal shift of mouse (in pixels) before something counts as move
127 */
128 private int initialMoveThreshold = 1;
129
130 /**
131 * The initial EastNorths of node1 and node2
132 */
133 private EastNorth initialN1en;
134 private EastNorth initialN2en;
135 /**
136 * The new EastNorths of node1 and node2
137 */
138 private EastNorth newN1en;
139 private EastNorth newN2en;
140
141 /**
142 * the command that performed last move.
143 */
144 private transient MoveCommand moveCommand;
145 /**
146 * The command used for dual alignment movement.
147 * Needs to be separate, due to two nodes moving in different directions.
148 */
149 private transient MoveCommand moveCommand2;
150
151 /** The cursor for the 'create_new' mode. */
152 private final Cursor cursorCreateNew;
153
154 /** The cursor for the 'translate' mode. */
155 private final Cursor cursorTranslate;
156
157 /** The cursor for the 'alwaysCreateNodes' submode. */
158 private final Cursor cursorCreateNodes;
159
160 private static class ReferenceSegment {
161 public final EastNorth en;
162 public final EastNorth p1;
163 public final EastNorth p2;
164 public final boolean perpendicular;
165
166 ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
167 this.en = en;
168 this.p1 = p1;
169 this.p2 = p2;
170 this.perpendicular = perpendicular;
171 }
172
173 @Override
174 public String toString() {
175 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + ']';
176 }
177 }
178
179 // Dual alignment mode stuff
180 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
181 private boolean dualAlignEnabled;
182 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met.
183 * Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
184 private boolean dualAlignActive;
185 /** Dual alignment reference segments */
186 private transient ReferenceSegment dualAlignSegment1, dualAlignSegment2;
187 /** {@code true}, if new segment was collapsed */
188 private boolean dualAlignSegmentCollapsed;
189 // Dual alignment UI stuff
190 private final DualAlignChangeAction dualAlignChangeAction;
191 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
192 private final transient Shortcut dualAlignShortcut;
193 private boolean useRepeatedShortcut;
194 private boolean ignoreNextKeyRelease;
195
196 private class DualAlignChangeAction extends JosmAction {
197 DualAlignChangeAction() {
198 super(tr("Dual alignment"), /* ICON() */ "mapmode/extrude/dualalign",
199 tr("Switch dual alignment mode while extruding"), null, false);
200 setHelpId(ht("/Action/Extrude#DualAlign"));
201 }
202
203 @Override
204 public void actionPerformed(ActionEvent e) {
205 toggleDualAlign();
206 }
207
208 @Override
209 protected void updateEnabledState() {
210 MapFrame map = MainApplication.getMap();
211 setEnabled(map != null && map.mapMode instanceof ExtrudeAction);
212 }
213 }
214
215 /**
216 * Creates a new ExtrudeAction
217 * @since 11713
218 */
219 public ExtrudeAction() {
220 super(tr("Extrude"), /* ICON(mapmode/) */ "extrude/extrude", tr("Create areas"),
221 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
222 ImageProvider.getCursor("normal", "rectangle"));
223 setHelpId(ht("/Action/Extrude"));
224 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
225 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
226 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
227
228 dualAlignEnabled = false;
229 dualAlignChangeAction = new DualAlignChangeAction();
230 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
231 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
232 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
233 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
234 tr("Edit: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
235 readPreferences(); // to show prefernces in table before entering the mode
236 }
237
238 @Override
239 public void destroy() {
240 super.destroy();
241 MainApplication.getMenu().editMenu.remove(dualAlignCheckboxMenuItem);
242 dualAlignChangeAction.destroy();
243 }
244
245 private JCheckBoxMenuItem addDualAlignMenuItem() {
246 int n = MainApplication.getMenu().editMenu.getItemCount();
247 return MainMenu.addWithCheckbox(MainApplication.getMenu().editMenu, dualAlignChangeAction, n >= 5 ? n-5 : -1, false);
248 }
249
250 // -------------------------------------------------------------------------
251 // Mode methods
252 // -------------------------------------------------------------------------
253
254 @Override
255 public String getModeHelpText() {
256 StringBuilder rv;
257 if (mode == Mode.select) {
258 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
259 "Alt-drag to create a new rectangle, double click to add a new node."));
260 if (dualAlignEnabled) {
261 rv.append(' ').append(tr("Dual alignment active."));
262 if (dualAlignSegmentCollapsed)
263 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
264 }
265 } else {
266 if (mode == Mode.translate)
267 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
268 else if (mode == Mode.translate_node)
269 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
270 else if (mode == Mode.extrude || mode == Mode.create_new)
271 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
272 else {
273 Logging.warn("Extrude: unknown mode " + mode);
274 rv = new StringBuilder();
275 }
276 if (dualAlignActive) {
277 rv.append(' ').append(tr("Dual alignment active."));
278 if (dualAlignSegmentCollapsed) {
279 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
280 }
281 }
282 }
283 return rv.toString();
284 }
285
286 @Override
287 public boolean layerIsSupported(Layer l) {
288 return isEditableDataLayer(l);
289 }
290
291 @Override
292 public void enterMode() {
293 super.enterMode();
294 MapFrame map = MainApplication.getMap();
295 map.mapView.addMouseListener(this);
296 map.mapView.addMouseMotionListener(this);
297 map.statusLine.setAutoLength(false);
298 ignoreNextKeyRelease = true;
299 map.keyDetector.addKeyListener(this);
300 map.keyDetector.addModifierExListener(this);
301 }
302
303 @Override
304 protected void readPreferences() {
305 initialMoveDelay = Config.getPref().getInt("edit.initial-move-delay", 200);
306 initialMoveThreshold = Config.getPref().getInt("extrude.initial-move-threshold", 1);
307 mainColor = new NamedColorProperty(marktr("Extrude: main line"), Color.RED).get();
308 helperColor = new NamedColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
309 helperStrokeDash = GuiHelper.getCustomizedStroke(Config.getPref().get("extrude.stroke.helper-line", "1 4"));
310 helperStrokeRA = new BasicStroke(1);
311 symbolSize = Config.getPref().getDouble("extrude.angle-symbol-radius", 8);
312 nodeDragWithoutCtrl = Config.getPref().getBoolean("extrude.drag-nodes-without-ctrl", false);
313 oldLineStroke = GuiHelper.getCustomizedStroke(Config.getPref().get("extrude.ctrl.stroke.old-line", "1"));
314 mainStroke = GuiHelper.getCustomizedStroke(Config.getPref().get("extrude.stroke.main", "3"));
315
316 ignoreSharedNodes = Config.getPref().getBoolean("extrude.ignore-shared-nodes", true);
317 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
318 useRepeatedShortcut = Config.getPref().getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
319 keepSegmentDirection = Config.getPref().getBoolean("extrude.dualalign.keep-segment-direction", true);
320 }
321
322 @Override
323 public void exitMode() {
324 MapFrame map = MainApplication.getMap();
325 map.mapView.removeMouseListener(this);
326 map.mapView.removeMouseMotionListener(this);
327 map.mapView.removeTemporaryLayer(this);
328 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
329 map.keyDetector.removeKeyListener(this);
330 map.keyDetector.removeModifierExListener(this);
331 super.exitMode();
332 }
333
334 // -------------------------------------------------------------------------
335 // Event handlers
336 // -------------------------------------------------------------------------
337
338 /**
339 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
340 */
341 @Override
342 public void modifiersExChanged(int modifiers) {
343 MapFrame map = MainApplication.getMap();
344 if (!MainApplication.isDisplayingMapView() || !map.mapView.isActiveLayerDrawable())
345 return;
346 updateKeyModifiersEx(modifiers);
347 if (mode == Mode.select) {
348 map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
349 }
350 }
351
352 @Override
353 public void doKeyPressed(KeyEvent e) {
354 // Do nothing
355 }
356
357 @Override
358 public void doKeyReleased(KeyEvent e) {
359 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
360 return;
361 if (ignoreNextKeyRelease) {
362 ignoreNextKeyRelease = false;
363 } else {
364 toggleDualAlign();
365 }
366 }
367
368 /**
369 * Toggles dual alignment mode.
370 */
371 private void toggleDualAlign() {
372 dualAlignEnabled = !dualAlignEnabled;
373 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
374 updateStatusLine();
375 }
376
377 /**
378 * If the left mouse button is pressed over a segment or a node, switches
379 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
380 * {@link #dualAlignEnabled}.
381 * @param e current mouse event
382 */
383 @Override
384 public void mousePressed(MouseEvent e) {
385 MapFrame map = MainApplication.getMap();
386 if (!map.mapView.isActiveLayerVisible())
387 return;
388 if (!(Boolean) this.getValue("active"))
389 return;
390 if (e.getButton() != MouseEvent.BUTTON1)
391 return;
392
393 requestFocusInMapView();
394 updateKeyModifiers(e);
395
396 selectedNode = map.mapView.getNearestNode(e.getPoint(), OsmPrimitive::isSelectable);
397 selectedSegment = map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
398
399 // If nothing gets caught, stay in select mode
400 if (selectedSegment == null && selectedNode == null) return;
401
402 if (selectedNode != null) {
403 if (ctrl || nodeDragWithoutCtrl) {
404 movingNodeList = new ArrayList<>();
405 movingNodeList.add(selectedNode);
406 calculatePossibleDirectionsByNode();
407 if (possibleMoveDirections.isEmpty()) {
408 // if no directions fould, do not enter dragging mode
409 return;
410 }
411 mode = Mode.translate_node;
412 dualAlignActive = false;
413 }
414 } else {
415 // Otherwise switch to another mode
416 if (dualAlignEnabled && checkDualAlignConditions()) {
417 dualAlignActive = true;
418 calculatePossibleDirectionsForDualAlign();
419 dualAlignSegmentCollapsed = false;
420 } else {
421 dualAlignActive = false;
422 calculatePossibleDirectionsBySegment();
423 }
424 if (ctrl) {
425 mode = Mode.translate;
426 movingNodeList = new ArrayList<>();
427 movingNodeList.add(selectedSegment.getFirstNode());
428 movingNodeList.add(selectedSegment.getSecondNode());
429 } else if (alt) {
430 mode = Mode.create_new;
431 // create a new segment and then select and extrude the new segment
432 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
433 alwaysCreateNodes = true;
434 } else {
435 mode = Mode.extrude;
436 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
437 alwaysCreateNodes = shift;
438 }
439 }
440
441 // Signifies that nothing has happened yet
442 newN1en = null;
443 newN2en = null;
444 moveCommand = null;
445 moveCommand2 = null;
446
447 map.mapView.addTemporaryLayer(this);
448
449 updateStatusLine();
450 map.mapView.repaint();
451
452 // Make note of time pressed
453 mouseDownTime = System.currentTimeMillis();
454
455 // Make note of mouse position
456 initialMousePos = e.getPoint();
457 }
458
459 /**
460 * Performs action depending on what {@link #mode} we're in.
461 * @param e current mouse event
462 */
463 @Override
464 public void mouseDragged(MouseEvent e) {
465 MapView mapView = MainApplication.getMap().mapView;
466 if (!mapView.isActiveLayerVisible())
467 return;
468
469 // do not count anything as a drag if it lasts less than 100 milliseconds.
470 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
471 return;
472
473 if (mode == Mode.select) {
474 // Just sit tight and wait for mouse to be released.
475 } else {
476 //move, create new and extrude mode - move the selected segment
477
478 EastNorth mouseEn = mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
479 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
480
481 mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
482
483 if (dualAlignActive) {
484 if (mode == Mode.extrude || mode == Mode.create_new) {
485 // nothing here
486 } else if (mode == Mode.translate) {
487 EastNorth movement1 = newN1en.subtract(initialN1en);
488 EastNorth movement2 = newN2en.subtract(initialN2en);
489 // move nodes to new position
490 if (moveCommand == null || moveCommand2 == null) {
491 // make a new move commands
492 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
493 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
494 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
495 UndoRedoHandler.getInstance().add(c);
496 } else {
497 // reuse existing move commands
498 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
499 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
500 }
501 }
502 } else if (bestMovement != null) {
503 if (mode == Mode.extrude || mode == Mode.create_new) {
504 //nothing here
505 } else if (mode == Mode.translate_node || mode == Mode.translate) {
506 //move nodes to new position
507 if (moveCommand == null) {
508 //make a new move command
509 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
510 UndoRedoHandler.getInstance().add(moveCommand);
511 } else {
512 //reuse existing move command
513 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
514 }
515 }
516 }
517
518 mapView.repaint();
519 }
520 }
521
522 /**
523 * Does anything that needs to be done, then switches back to select mode.
524 * @param e current mouse event
525 */
526 @Override
527 public void mouseReleased(MouseEvent e) {
528
529 MapView mapView = MainApplication.getMap().mapView;
530 if (!mapView.isActiveLayerVisible())
531 return;
532
533 if (mode == Mode.select) {
534 // Nothing to be done
535 } else {
536 if (mode == Mode.create_new) {
537 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
538 createNewRectangle();
539 }
540 } else if (mode == Mode.extrude) {
541 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
542 // double click adds a new node
543 addNewNode(e);
544 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
545 try {
546 // main extrusion commands
547 performExtrusion();
548 } catch (DataIntegrityProblemException ex) {
549 // Can occur if calling undo while extruding, see #12870
550 Logging.error(ex);
551 }
552 }
553 } else if (mode == Mode.translate || mode == Mode.translate_node) {
554 //Commit translate
555 //the move command is already committed in mouseDragged
556 joinNodesIfCollapsed(movingNodeList);
557 }
558 MainApplication.getMap().statusLine.setDist(getLayerManager().getEditDataSet().getSelectedWays());
559 MainApplication.getMap().statusLine.repaint();
560
561 updateKeyModifiers(e);
562 // Switch back into select mode
563 mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
564 mapView.removeTemporaryLayer(this);
565 selectedSegment = null;
566 moveCommand = null;
567 mode = Mode.select;
568 dualAlignSegmentCollapsed = false;
569 updateStatusLine();
570 mapView.repaint();
571 }
572 }
573
574 // -------------------------------------------------------------------------
575 // Custom methods
576 // -------------------------------------------------------------------------
577
578 /**
579 * Inserts node into nearby segment.
580 * @param e current mouse point
581 */
582 private static void addNewNode(MouseEvent e) {
583 // Should maybe do the same as in DrawAction and fetch all nearby segments?
584 MapView mapView = MainApplication.getMap().mapView;
585 WaySegment ws = mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
586 if (ws != null) {
587 Node n = new Node(mapView.getLatLon(e.getX(), e.getY()));
588 EastNorth a = ws.getFirstNode().getEastNorth();
589 EastNorth b = ws.getSecondNode().getEastNorth();
590 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
591 Way wnew = new Way(ws.way);
592 wnew.addNode(ws.lowerIndex+1, n);
593 DataSet ds = ws.way.getDataSet();
594 UndoRedoHandler.getInstance().add(new SequenceCommand(tr("Add a new node to an existing way"),
595 new AddCommand(ds, n), new ChangeNodesCommand(ds, ws.way, wnew.getNodes())));
596 wnew.setNodes(null); // see #19885
597
598 }
599 }
600
601 /**
602 * Creates a new way that shares segment with selected way.
603 */
604 private void createNewRectangle() {
605 if (selectedSegment == null) return;
606 DataSet ds = getLayerManager().getEditDataSet();
607 // create a new rectangle
608 Collection<Command> cmds = new LinkedList<>();
609 Node third = new Node(newN2en);
610 Node fourth = new Node(newN1en);
611 Way wnew = new Way();
612 wnew.addNode(selectedSegment.getFirstNode());
613 wnew.addNode(selectedSegment.getSecondNode());
614 wnew.addNode(third);
615 if (!dualAlignSegmentCollapsed) {
616 // rectangle can degrade to triangle for dual alignment after collapsing
617 wnew.addNode(fourth);
618 }
619 // ... and close the way
620 wnew.addNode(selectedSegment.getFirstNode());
621 // undo support
622 cmds.add(new AddCommand(ds, third));
623 if (!dualAlignSegmentCollapsed) {
624 cmds.add(new AddCommand(ds, fourth));
625 }
626 cmds.add(new AddCommand(ds, wnew));
627 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
628 UndoRedoHandler.getInstance().add(c);
629 ds.setSelected(wnew);
630 }
631
632 /**
633 * Does actual extrusion of {@link #selectedSegment}.
634 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
635 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
636 */
637 private void performExtrusion() {
638 DataSet ds = getLayerManager().getEditDataSet();
639 // create extrusion
640 Collection<Command> cmds = new LinkedList<>();
641 Way wnew = new Way(selectedSegment.way);
642 boolean wayWasModified = false;
643 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
644 int insertionPoint = selectedSegment.lowerIndex + 1;
645
646 //find if the new points overlap existing segments (in case of 90 degree angles)
647 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
648 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
649 // segmentAngleZero marks subset of nodeOverlapsSegment.
650 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
651 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
652 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
653 List<Node> changedNodes = new ArrayList<>();
654 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
655 //move existing node
656 Node n1Old = selectedSegment.getFirstNode();
657 cmds.add(new MoveCommand(n1Old, ProjectionRegistry.getProjection().eastNorth2latlon(newN1en)));
658 changedNodes.add(n1Old);
659 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
660 // replace shared node with new one
661 Node n1Old = selectedSegment.getFirstNode();
662 Node n1New = new Node(ProjectionRegistry.getProjection().eastNorth2latlon(newN1en));
663 wnew.addNode(insertionPoint, n1New);
664 wnew.removeNode(n1Old);
665 wayWasModified = true;
666 cmds.add(new AddCommand(ds, n1New));
667 changedNodes.add(n1New);
668 } else {
669 //introduce new node
670 Node n1New = new Node(ProjectionRegistry.getProjection().eastNorth2latlon(newN1en));
671 wnew.addNode(insertionPoint, n1New);
672 wayWasModified = true;
673 insertionPoint++;
674 cmds.add(new AddCommand(ds, n1New));
675 changedNodes.add(n1New);
676 }
677
678 //find if the new points overlap existing segments (in case of 90 degree angles)
679 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
680 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
681 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
682 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
683
684 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
685 //move existing node
686 Node n2Old = selectedSegment.getSecondNode();
687 cmds.add(new MoveCommand(n2Old, ProjectionRegistry.getProjection().eastNorth2latlon(newN2en)));
688 changedNodes.add(n2Old);
689 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
690 // replace shared node with new one
691 Node n2Old = selectedSegment.getSecondNode();
692 Node n2New = new Node(ProjectionRegistry.getProjection().eastNorth2latlon(newN2en));
693 wnew.addNode(insertionPoint, n2New);
694 wnew.removeNode(n2Old);
695 wayWasModified = true;
696 cmds.add(new AddCommand(ds, n2New));
697 changedNodes.add(n2New);
698 } else {
699 //introduce new node
700 Node n2New = new Node(ProjectionRegistry.getProjection().eastNorth2latlon(newN2en));
701 wnew.addNode(insertionPoint, n2New);
702 wayWasModified = true;
703 cmds.add(new AddCommand(ds, n2New));
704 changedNodes.add(n2New);
705 }
706
707 //the way was a single segment, close the way
708 if (wayWasSingleSegment) {
709 wnew.addNode(selectedSegment.getFirstNode());
710 wayWasModified = true;
711 }
712 if (wayWasModified) {
713 // we only need to change the way if its node list was really modified
714 cmds.add(new ChangeNodesCommand(selectedSegment.way, wnew.getNodes()));
715 wnew.setNodes(null); // see #19885
716 }
717 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
718 UndoRedoHandler.getInstance().add(c);
719 joinNodesIfCollapsed(changedNodes);
720 }
721
722 private void joinNodesIfCollapsed(List<Node> changedNodes) {
723 if (!dualAlignActive || newN1en == null || newN2en == null) return;
724 if (newN1en.distance(newN2en) > 1e-6) return;
725 // If the dual alignment moved two nodes to the same point, merge them
726 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
727 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
728 Command mergeCmd = MergeNodesAction.mergeNodes(changedNodes, targetNode, locNode);
729 if (mergeCmd != null) {
730 UndoRedoHandler.getInstance().add(mergeCmd);
731 } else {
732 // undo extruding command itself
733 UndoRedoHandler.getInstance().undo();
734 }
735 }
736
737 /**
738 * This method tests if {@code node} has other ways apart from the given one.
739 * @param node node to test
740 * @param myWay way known to contain this node
741 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
742 */
743 private static boolean hasNodeOtherWays(Node node, Way myWay) {
744 return node.getReferrers().stream()
745 .anyMatch(p -> p instanceof Way && p.isUsable() && p != myWay);
746 }
747
748 /**
749 * Determines best movement from {@link #initialMousePos} to current mouse position,
750 * choosing one of the directions from {@link #possibleMoveDirections}.
751 * @param mouseEn current mouse position
752 * @return movement vector
753 */
754 private EastNorth calculateBestMovement(EastNorth mouseEn) {
755
756 EastNorth initialMouseEn = MainApplication.getMap().mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
757 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
758
759 double bestDistance = Double.POSITIVE_INFINITY;
760 EastNorth bestMovement = null;
761 activeMoveDirection = null;
762
763 //find the best movement direction and vector
764 for (ReferenceSegment direction : possibleMoveDirections) {
765 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
766 if (movement == null) {
767 //if direction parallel to segment.
768 continue;
769 }
770
771 double distanceFromMouseMovement = movement.distance(mouseMovement);
772 if (bestDistance > distanceFromMouseMovement) {
773 bestDistance = distanceFromMouseMovement;
774 activeMoveDirection = direction;
775 bestMovement = movement;
776 }
777 }
778 return bestMovement;
779 }
780
781 /***
782 * This method calculates offset amount by which to move the given segment
783 * perpendicularly for it to be in line with mouse position.
784 * @param segmentP1 segment's first point
785 * @param segmentP2 segment's second point
786 * @param moveDirection direction of movement
787 * @param targetPos mouse position
788 * @return offset amount of P1 and P2.
789 */
790 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
791 EastNorth targetPos) {
792 EastNorth intersectionPoint;
793 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
794 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
795 } else {
796 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
797 }
798
799 if (intersectionPoint == null)
800 return null;
801 else
802 //return distance form base to target position
803 return targetPos.subtract(intersectionPoint);
804 }
805
806 /**
807 * Gathers possible move directions - perpendicular to the selected segment
808 * and parallel to neighboring segments.
809 */
810 private void calculatePossibleDirectionsBySegment() {
811 // remember initial positions for segment nodes.
812 initialN1en = selectedSegment.getFirstNode().getEastNorth();
813 initialN2en = selectedSegment.getSecondNode().getEastNorth();
814
815 //add direction perpendicular to the selected segment
816 possibleMoveDirections = new ArrayList<>();
817 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
818 initialN1en.getY() - initialN2en.getY(),
819 initialN2en.getX() - initialN1en.getX()
820 ), initialN1en, initialN2en, true));
821
822
823 //add directions parallel to neighbor segments
824 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
825 if (prevNode != null) {
826 EastNorth en = prevNode.getEastNorth();
827 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
828 initialN1en.getX() - en.getX(),
829 initialN1en.getY() - en.getY()
830 ), initialN1en, en, false));
831 }
832
833 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
834 if (nextNode != null) {
835 EastNorth en = nextNode.getEastNorth();
836 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
837 initialN2en.getX() - en.getX(),
838 initialN2en.getY() - en.getY()
839 ), initialN2en, en, false));
840 }
841 }
842
843 /**
844 * Gathers possible move directions - along all adjacent segments.
845 */
846 private void calculatePossibleDirectionsByNode() {
847 // remember initial positions for segment nodes.
848 initialN1en = selectedNode.getEastNorth();
849 initialN2en = initialN1en;
850 possibleMoveDirections = new ArrayList<>();
851 for (OsmPrimitive p: selectedNode.getReferrers()) {
852 if (p instanceof Way && p.isUsable()) {
853 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
854 EastNorth en = neighbor.getEastNorth();
855 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
856 initialN1en.getX() - en.getX(),
857 initialN1en.getY() - en.getY()
858 ), initialN1en, en, false));
859 }
860 }
861 }
862 }
863
864 /**
865 * Checks dual alignment conditions:
866 * 1. selected segment has both neighboring segments,
867 * 2. selected segment is not parallel with neighboring segments.
868 * @return {@code true} if dual alignment conditions are satisfied
869 */
870 private boolean checkDualAlignConditions() {
871 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
872 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
873 if (prevNode == null || nextNode == null) {
874 return false;
875 }
876
877 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
878 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
879 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
880 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
881 return false;
882 }
883
884 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
885 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
886 return !prevSegmentParallel && !nextSegmentParallel;
887 }
888
889 /**
890 * Gathers possible move directions - perpendicular to the selected segment only.
891 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
892 */
893 private void calculatePossibleDirectionsForDualAlign() {
894 // remember initial positions for segment nodes.
895 initialN1en = selectedSegment.getFirstNode().getEastNorth();
896 initialN2en = selectedSegment.getSecondNode().getEastNorth();
897
898 // add direction perpendicular to the selected segment
899 possibleMoveDirections = new ArrayList<>();
900 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
901 initialN1en.getY() - initialN2en.getY(),
902 initialN2en.getX() - initialN1en.getX()
903 ), initialN1en, initialN2en, true));
904
905 // set neighboring segments
906 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
907 if (prevNode != null) {
908 EastNorth prevNodeEn = prevNode.getEastNorth();
909 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
910 initialN1en.getX() - prevNodeEn.getX(),
911 initialN1en.getY() - prevNodeEn.getY()
912 ), initialN1en, prevNodeEn, false);
913 }
914
915 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
916 if (nextNode != null) {
917 EastNorth nextNodeEn = nextNode.getEastNorth();
918 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
919 initialN2en.getX() - nextNodeEn.getX(),
920 initialN2en.getY() - nextNodeEn.getY()
921 ), initialN2en, nextNodeEn, false);
922 }
923 }
924
925 /**
926 * Calculate newN1en, newN2en best suitable for given mouse coordinates
927 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
928 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
929 * @param mouseEn mouse coordinates
930 * @return best movement vector
931 */
932 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
933 EastNorth bestMovement = calculateBestMovement(mouseEn);
934 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
935
936 // find out the movement distance, in metres
937 double distance = ProjectionRegistry.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
938 ProjectionRegistry.getProjection().eastNorth2latlon(n1movedEn));
939 MainApplication.getMap().statusLine.setDist(distance);
940 updateStatusLine();
941
942 if (dualAlignActive) {
943 // new positions of selected segment's nodes, without applying dual alignment
944 n1movedEn = initialN1en.add(bestMovement);
945 n2movedEn = initialN2en.add(bestMovement);
946
947 // calculate intersections of parallel shifted segment and the adjacent lines
948 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
949 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
950 if (newN1en == null || newN2en == null) return bestMovement;
951 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
952 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
953 dualAlignSegment2.p1, dualAlignSegment2.p2);
954 newN1en = collapsedSegmentPosition;
955 newN2en = collapsedSegmentPosition;
956 dualAlignSegmentCollapsed = true;
957 } else {
958 dualAlignSegmentCollapsed = false;
959 }
960 } else {
961 newN1en = n1movedEn;
962 newN2en = initialN2en.add(bestMovement);
963 }
964 return bestMovement;
965 }
966
967 /**
968 * Gets a node index from selected way before given index.
969 * @param index index of current node
970 * @return index of previous node or <code>-1</code> if there are no nodes there.
971 */
972 private int getPreviousNodeIndex(int index) {
973 if (index > 0)
974 return index - 1;
975 else if (selectedSegment.way.isClosed())
976 return selectedSegment.way.getNodesCount() - 2;
977 else
978 return -1;
979 }
980
981 /**
982 * Gets a node from selected way before given index.
983 * @param index index of current node
984 * @return previous node or <code>null</code> if there are no nodes there.
985 */
986 private Node getPreviousNode(int index) {
987 int indexPrev = getPreviousNodeIndex(index);
988 if (indexPrev >= 0)
989 return selectedSegment.way.getNode(indexPrev);
990 else
991 return null;
992 }
993
994 /**
995 * Gets a node index from selected way after given index.
996 * @param index index of current node
997 * @return index of next node or <code>-1</code> if there are no nodes there.
998 */
999 private int getNextNodeIndex(int index) {
1000 int count = selectedSegment.way.getNodesCount();
1001 if (index < count - 1)
1002 return index + 1;
1003 else if (selectedSegment.way.isClosed())
1004 return 1;
1005 else
1006 return -1;
1007 }
1008
1009 /**
1010 * Gets a node from selected way after given index.
1011 * @param index index of current node
1012 * @return next node or <code>null</code> if there are no nodes there.
1013 */
1014 private Node getNextNode(int index) {
1015 int indexNext = getNextNodeIndex(index);
1016 if (indexNext >= 0)
1017 return selectedSegment.way.getNode(indexNext);
1018 else
1019 return null;
1020 }
1021
1022 // -------------------------------------------------------------------------
1023 // paint methods
1024 // -------------------------------------------------------------------------
1025
1026 @Override
1027 public void paint(Graphics2D g, MapView mv, Bounds box) {
1028 Graphics2D g2 = g;
1029 if (mode == Mode.select) {
1030 // Nothing to do
1031 } else {
1032 if (newN1en != null) {
1033
1034 EastNorth p1 = initialN1en;
1035 EastNorth p2 = initialN2en;
1036 EastNorth p3 = newN1en;
1037 EastNorth p4 = newN2en;
1038
1039 Point2D normalUnitVector = activeMoveDirection != null ? getNormalUniVector() : null;
1040
1041 if (mode == Mode.extrude || mode == Mode.create_new) {
1042 g2.setColor(mainColor);
1043 g2.setStroke(mainStroke);
1044 // Draw rectangle around new area.
1045 MapViewPath b = new MapViewPath(mv);
1046 b.moveTo(p1);
1047 b.lineTo(p3);
1048 b.lineTo(p4);
1049 b.lineTo(p2);
1050 b.lineTo(p1);
1051 g2.draw(b);
1052
1053 if (dualAlignActive) {
1054 // Draw reference ways
1055 drawReferenceSegment(g2, mv, dualAlignSegment1);
1056 drawReferenceSegment(g2, mv, dualAlignSegment2);
1057 } else if (activeMoveDirection != null && normalUnitVector != null) {
1058 // Draw reference way
1059 drawReferenceSegment(g2, mv, activeMoveDirection);
1060
1061 // Draw right angle marker on first node position, only when moving at right angle
1062 if (activeMoveDirection.perpendicular) {
1063 // mirror RightAngle marker, so it is inside the extrude
1064 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1065 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1066 double headingDiff = headingRefWS - headingMoveDir;
1067 if (headingDiff < 0)
1068 headingDiff += 2 * Math.PI;
1069 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1070 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1071 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1072 }
1073 }
1074 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1075 g2.setColor(mainColor);
1076 if (p1.distance(p2) < 3) {
1077 g2.setStroke(mainStroke);
1078 g2.draw(new MapViewPath(mv).shapeAround(p1, SymbolShape.CIRCLE, symbolSize));
1079 } else {
1080 g2.setStroke(oldLineStroke);
1081 g2.draw(new MapViewPath(mv).moveTo(p1).lineTo(p2));
1082 }
1083
1084 if (dualAlignActive) {
1085 // Draw reference ways
1086 drawReferenceSegment(g2, mv, dualAlignSegment1);
1087 drawReferenceSegment(g2, mv, dualAlignSegment2);
1088 } else if (activeMoveDirection != null) {
1089
1090 g2.setColor(helperColor);
1091 g2.setStroke(helperStrokeDash);
1092 // Draw a guideline along the normal.
1093 Point2D centerpoint = mv.getPoint2D(p1.interpolate(p2, .5));
1094 g2.draw(createSemiInfiniteLine(centerpoint, normalUnitVector, g2));
1095 // Draw right angle marker on initial position, only when moving at right angle
1096 if (activeMoveDirection.perpendicular) {
1097 // EastNorth units per pixel
1098 g2.setStroke(helperStrokeRA);
1099 g2.setColor(mainColor);
1100 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1101 }
1102 }
1103 }
1104 }
1105 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1106 }
1107 }
1108
1109 private Point2D getNormalUniVector() {
1110 double fac = 1.0 / activeMoveDirection.en.length();
1111 // mult by factor to get unit vector.
1112 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1113
1114 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1115 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1116 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1117 // If not, use a sign-flipped version of the normalUnitVector.
1118 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1119 }
1120
1121 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1122 //This is normally done by MapView.getPoint, but it does not work on vectors.
1123 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1124 return normalUnitVector;
1125 }
1126
1127 /**
1128 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1129 * @param from1 vector1 start
1130 * @param to1 vector1 end
1131 * @param from2 vector2 start
1132 * @param to2 vector2 end
1133 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1134 */
1135 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1136 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1137 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1138 }
1139
1140 /**
1141 * Draws right angle symbol at specified position.
1142 * @param g2 the Graphics2D object used to draw on
1143 * @param center center point of angle
1144 * @param normal vector of normal
1145 * @param mirror {@code true} if symbol should be mirrored by the normal
1146 */
1147 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1148 // EastNorth units per pixel
1149 double factor = 1.0/g2.getTransform().getScaleX();
1150 double raoffsetx = symbolSize*factor*normal.getX();
1151 double raoffsety = symbolSize*factor*normal.getY();
1152
1153 double cx = center.getX(), cy = center.getY();
1154 double k = mirror ? -1 : 1;
1155 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1156 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1157 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1158
1159 GeneralPath ra = new GeneralPath();
1160 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1161 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1162 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1163 g2.setStroke(helperStrokeRA);
1164 g2.draw(ra);
1165 }
1166
1167 /**
1168 * Draws given reference segment.
1169 * @param g2 the Graphics2D object used to draw on
1170 * @param mv map view
1171 * @param seg the reference segment
1172 */
1173 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1174 g2.setColor(helperColor);
1175 g2.setStroke(helperStrokeDash);
1176 g2.draw(new MapViewPath(mv).moveTo(seg.p1).lineTo(seg.p2));
1177 }
1178
1179 /**
1180 * Creates a new Line that extends off the edge of the viewport in one direction
1181 * @param start The start point of the line
1182 * @param unitvector A unit vector denoting the direction of the line
1183 * @param g the Graphics2D object it will be used on
1184 * @return created line
1185 */
1186 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1187 Rectangle bounds = g.getClipBounds();
1188 try {
1189 AffineTransform invtrans = g.getTransform().createInverse();
1190 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1191 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1192
1193 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1194 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1195 // This can be used as a safe length of line to generate which will always go off-viewport.
1196 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1197 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1198
1199 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1200 + (unitvector.getY() * linelength)));
1201 } catch (NoninvertibleTransformException e) {
1202 Logging.debug(e);
1203 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1204 + (unitvector.getY() * 10)));
1205 }
1206 }
1207}
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