source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 12641

Last change on this file since 12641 was 12641, checked in by Don-vip, 8 years ago

see #15182 - deprecate Main.main.undoRedo. Replacement: gui.MainApplication.undoRedo
  • Property svn:eol-style set to native
File size: 51.0 KB
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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;
29import javax.swing.JMenuItem;
30
31import org.openstreetmap.josm.Main;
32import org.openstreetmap.josm.actions.JosmAction;
33import org.openstreetmap.josm.actions.MergeNodesAction;
34import org.openstreetmap.josm.command.AddCommand;
35import org.openstreetmap.josm.command.ChangeCommand;
36import org.openstreetmap.josm.command.Command;
37import org.openstreetmap.josm.command.MoveCommand;
38import org.openstreetmap.josm.command.SequenceCommand;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.coor.EastNorth;
41import org.openstreetmap.josm.data.osm.DataIntegrityProblemException;
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.ColorProperty;
47import org.openstreetmap.josm.gui.MainApplication;
48import org.openstreetmap.josm.gui.MainMenu;
49import org.openstreetmap.josm.gui.MapFrame;
50import org.openstreetmap.josm.gui.MapView;
51import org.openstreetmap.josm.gui.draw.MapViewPath;
52import org.openstreetmap.josm.gui.draw.SymbolShape;
53import org.openstreetmap.josm.gui.layer.Layer;
54import org.openstreetmap.josm.gui.layer.MapViewPaintable;
55import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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.tools.Geometry;
60import org.openstreetmap.josm.tools.ImageProvider;
61import org.openstreetmap.josm.tools.Logging;
62import org.openstreetmap.josm.tools.Shortcut;
63
64/**
65 * Makes a rectangle from a line, or modifies a rectangle.
66 */
67public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierExListener {
68
69 enum Mode { extrude, translate, select, create_new, translate_node }
70
71 private Mode mode = Mode.select;
72
73 /**
74 * If {@code true}, when extruding create new node(s) even if segments are parallel.
75 */
76 private boolean alwaysCreateNodes;
77 private boolean nodeDragWithoutCtrl;
78
79 private long mouseDownTime;
80 private transient WaySegment selectedSegment;
81 private transient Node selectedNode;
82 private Color mainColor;
83 private transient Stroke mainStroke;
84
85 /** settings value whether shared nodes should be ignored or not */
86 private boolean ignoreSharedNodes;
87
88 private boolean keepSegmentDirection;
89
90 /**
91 * drawing settings for helper lines
92 */
93 private Color helperColor;
94 private transient Stroke helperStrokeDash;
95 private transient Stroke helperStrokeRA;
96
97 private transient Stroke oldLineStroke;
98 private double symbolSize;
99 /**
100 * Possible directions to move to.
101 */
102 private transient List<ReferenceSegment> possibleMoveDirections;
103
104
105 /**
106 * Collection of nodes that is moved
107 */
108 private transient List<Node> movingNodeList;
109
110 /**
111 * The direction that is currently active.
112 */
113 private transient ReferenceSegment activeMoveDirection;
114
115 /**
116 * The position of the mouse cursor when the drag action was initiated.
117 */
118 private Point initialMousePos;
119 /**
120 * The time which needs to pass between click and release before something
121 * counts as a move, in milliseconds
122 */
123 private int initialMoveDelay = 200;
124 /**
125 * The minimal shift of mouse (in pixels) befire something counts as move
126 */
127 private int initialMoveThreshold = 1;
128
129 /**
130 * The initial EastNorths of node1 and node2
131 */
132 private EastNorth initialN1en;
133 private EastNorth initialN2en;
134 /**
135 * The new EastNorths of node1 and node2
136 */
137 private EastNorth newN1en;
138 private EastNorth newN2en;
139
140 /**
141 * the command that performed last move.
142 */
143 private transient MoveCommand moveCommand;
144 /**
145 * The command used for dual alignment movement.
146 * Needs to be separate, due to two nodes moving in different directions.
147 */
148 private transient MoveCommand moveCommand2;
149
150 /** The cursor for the 'create_new' mode. */
151 private final Cursor cursorCreateNew;
152
153 /** The cursor for the 'translate' mode. */
154 private final Cursor cursorTranslate;
155
156 /** The cursor for the 'alwaysCreateNodes' submode. */
157 private final Cursor cursorCreateNodes;
158
159 private static class ReferenceSegment {
160 public final EastNorth en;
161 public final EastNorth p1;
162 public final EastNorth p2;
163 public final boolean perpendicular;
164
165 ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
166 this.en = en;
167 this.p1 = p1;
168 this.p2 = p2;
169 this.perpendicular = perpendicular;
170 }
171
172 @Override
173 public String toString() {
174 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + ']';
175 }
176 }
177
178 // Dual alignment mode stuff
179 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
180 private boolean dualAlignEnabled;
181 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met.
182 * Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
183 private boolean dualAlignActive;
184 /** Dual alignment reference segments */
185 private transient ReferenceSegment dualAlignSegment1, dualAlignSegment2;
186 /** {@code true}, if new segment was collapsed */
187 private boolean dualAlignSegmentCollapsed;
188 // Dual alignment UI stuff
189 private final DualAlignChangeAction dualAlignChangeAction;
190 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
191 private final transient Shortcut dualAlignShortcut;
192 private boolean useRepeatedShortcut;
193 private boolean ignoreNextKeyRelease;
194
195 private class DualAlignChangeAction extends JosmAction {
196 DualAlignChangeAction() {
197 super(tr("Dual alignment"), /* ICON() */ "mapmode/extrude/dualalign",
198 tr("Switch dual alignment mode while extruding"), null, false);
199 putValue("help", ht("/Action/Extrude#DualAlign"));
200 }
201
202 @Override
203 public void actionPerformed(ActionEvent e) {
204 toggleDualAlign();
205 }
206
207 @Override
208 protected void updateEnabledState() {
209 MapFrame map = MainApplication.getMap();
210 setEnabled(map != null && map.mapMode instanceof ExtrudeAction);
211 }
212 }
213
214 /**
215 * Creates a new ExtrudeAction
216 * @since 11713
217 */
218 public ExtrudeAction() {
219 super(tr("Extrude"), /* ICON(mapmode/) */ "extrude/extrude", tr("Create areas"),
220 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
221 ImageProvider.getCursor("normal", "rectangle"));
222 putValue("help", ht("/Action/Extrude"));
223 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
224 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
225 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
226
227 dualAlignEnabled = false;
228 dualAlignChangeAction = new DualAlignChangeAction();
229 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
230 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
231 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
232 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
233 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
234 readPreferences(); // to show prefernces in table before entering the mode
235 }
236
237 @Override
238 public void destroy() {
239 super.destroy();
240 dualAlignChangeAction.destroy();
241 }
242
243 private JCheckBoxMenuItem addDualAlignMenuItem() {
244 int n = Main.main.menu.editMenu.getItemCount();
245 for (int i = n-1; i > 0; i--) {
246 JMenuItem item = Main.main.menu.editMenu.getItem(i);
247 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
248 Main.main.menu.editMenu.remove(i);
249 }
250 }
251 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
252 }
253
254 // -------------------------------------------------------------------------
255 // Mode methods
256 // -------------------------------------------------------------------------
257
258 @Override
259 public String getModeHelpText() {
260 StringBuilder rv;
261 if (mode == Mode.select) {
262 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
263 "Alt-drag to create a new rectangle, double click to add a new node."));
264 if (dualAlignEnabled) {
265 rv.append(' ').append(tr("Dual alignment active."));
266 if (dualAlignSegmentCollapsed)
267 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
268 }
269 } else {
270 if (mode == Mode.translate)
271 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
272 else if (mode == Mode.translate_node)
273 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
274 else if (mode == Mode.extrude || mode == Mode.create_new)
275 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
276 else {
277 Logging.warn("Extrude: unknown mode " + mode);
278 rv = new StringBuilder();
279 }
280 if (dualAlignActive) {
281 rv.append(' ').append(tr("Dual alignment active."));
282 if (dualAlignSegmentCollapsed) {
283 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
284 }
285 }
286 }
287 return rv.toString();
288 }
289
290 @Override
291 public boolean layerIsSupported(Layer l) {
292 return l instanceof OsmDataLayer;
293 }
294
295 @Override
296 public void enterMode() {
297 super.enterMode();
298 MapFrame map = MainApplication.getMap();
299 map.mapView.addMouseListener(this);
300 map.mapView.addMouseMotionListener(this);
301 ignoreNextKeyRelease = true;
302 map.keyDetector.addKeyListener(this);
303 map.keyDetector.addModifierExListener(this);
304 }
305
306 @Override
307 protected void readPreferences() {
308 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
309 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
310 mainColor = new ColorProperty(marktr("Extrude: main line"), Color.RED).get();
311 helperColor = new ColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
312 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
313 helperStrokeRA = new BasicStroke(1);
314 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
315 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
316 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
317 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
318
319 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
320 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
321 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
322 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
323 }
324
325 @Override
326 public void exitMode() {
327 MapFrame map = MainApplication.getMap();
328 map.mapView.removeMouseListener(this);
329 map.mapView.removeMouseMotionListener(this);
330 map.mapView.removeTemporaryLayer(this);
331 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
332 map.keyDetector.removeKeyListener(this);
333 map.keyDetector.removeModifierExListener(this);
334 super.exitMode();
335 }
336
337 // -------------------------------------------------------------------------
338 // Event handlers
339 // -------------------------------------------------------------------------
340
341 /**
342 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
343 */
344 @Override
345 public void modifiersExChanged(int modifiers) {
346 MapFrame map = MainApplication.getMap();
347 if (!MainApplication.isDisplayingMapView() || !map.mapView.isActiveLayerDrawable())
348 return;
349 updateKeyModifiersEx(modifiers);
350 if (mode == Mode.select) {
351 map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
352 }
353 }
354
355 @Override
356 public void doKeyPressed(KeyEvent e) {
357 // Do nothing
358 }
359
360 @Override
361 public void doKeyReleased(KeyEvent e) {
362 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
363 return;
364 if (ignoreNextKeyRelease) {
365 ignoreNextKeyRelease = false;
366 } else {
367 toggleDualAlign();
368 }
369 }
370
371 /**
372 * Toggles dual alignment mode.
373 */
374 private void toggleDualAlign() {
375 dualAlignEnabled = !dualAlignEnabled;
376 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
377 updateStatusLine();
378 }
379
380 /**
381 * If the left mouse button is pressed over a segment or a node, switches
382 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
383 * {@link #dualAlignEnabled}.
384 * @param e current mouse event
385 */
386 @Override
387 public void mousePressed(MouseEvent e) {
388 MapFrame map = MainApplication.getMap();
389 if (!map.mapView.isActiveLayerVisible())
390 return;
391 if (!(Boolean) this.getValue("active"))
392 return;
393 if (e.getButton() != MouseEvent.BUTTON1)
394 return;
395
396 requestFocusInMapView();
397 updateKeyModifiers(e);
398
399 selectedNode = map.mapView.getNearestNode(e.getPoint(), OsmPrimitive::isSelectable);
400 selectedSegment = map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
401
402 // If nothing gets caught, stay in select mode
403 if (selectedSegment == null && selectedNode == null) return;
404
405 if (selectedNode != null) {
406 if (ctrl || nodeDragWithoutCtrl) {
407 movingNodeList = new ArrayList<>();
408 movingNodeList.add(selectedNode);
409 calculatePossibleDirectionsByNode();
410 if (possibleMoveDirections.isEmpty()) {
411 // if no directions fould, do not enter dragging mode
412 return;
413 }
414 mode = Mode.translate_node;
415 dualAlignActive = false;
416 }
417 } else {
418 // Otherwise switch to another mode
419 if (dualAlignEnabled && checkDualAlignConditions()) {
420 dualAlignActive = true;
421 calculatePossibleDirectionsForDualAlign();
422 dualAlignSegmentCollapsed = false;
423 } else {
424 dualAlignActive = false;
425 calculatePossibleDirectionsBySegment();
426 }
427 if (ctrl) {
428 mode = Mode.translate;
429 movingNodeList = new ArrayList<>();
430 movingNodeList.add(selectedSegment.getFirstNode());
431 movingNodeList.add(selectedSegment.getSecondNode());
432 } else if (alt) {
433 mode = Mode.create_new;
434 // create a new segment and then select and extrude the new segment
435 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
436 alwaysCreateNodes = true;
437 } else {
438 mode = Mode.extrude;
439 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
440 alwaysCreateNodes = shift;
441 }
442 }
443
444 // Signifies that nothing has happened yet
445 newN1en = null;
446 newN2en = null;
447 moveCommand = null;
448 moveCommand2 = null;
449
450 map.mapView.addTemporaryLayer(this);
451
452 updateStatusLine();
453 map.mapView.repaint();
454
455 // Make note of time pressed
456 mouseDownTime = System.currentTimeMillis();
457
458 // Make note of mouse position
459 initialMousePos = e.getPoint();
460 }
461
462 /**
463 * Performs action depending on what {@link #mode} we're in.
464 * @param e current mouse event
465 */
466 @Override
467 public void mouseDragged(MouseEvent e) {
468 MapView mapView = MainApplication.getMap().mapView;
469 if (!mapView.isActiveLayerVisible())
470 return;
471
472 // do not count anything as a drag if it lasts less than 100 milliseconds.
473 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
474 return;
475
476 if (mode == Mode.select) {
477 // Just sit tight and wait for mouse to be released.
478 } else {
479 //move, create new and extrude mode - move the selected segment
480
481 EastNorth mouseEn = mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
482 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
483
484 mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
485
486 if (dualAlignActive) {
487 if (mode == Mode.extrude || mode == Mode.create_new) {
488 // nothing here
489 } else if (mode == Mode.translate) {
490 EastNorth movement1 = newN1en.subtract(initialN1en);
491 EastNorth movement2 = newN2en.subtract(initialN2en);
492 // move nodes to new position
493 if (moveCommand == null || moveCommand2 == null) {
494 // make a new move commands
495 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
496 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
497 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
498 MainApplication.undoRedo.add(c);
499 } else {
500 // reuse existing move commands
501 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
502 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
503 }
504 }
505 } else if (bestMovement != null) {
506 if (mode == Mode.extrude || mode == Mode.create_new) {
507 //nothing here
508 } else if (mode == Mode.translate_node || mode == Mode.translate) {
509 //move nodes to new position
510 if (moveCommand == null) {
511 //make a new move command
512 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
513 MainApplication.undoRedo.add(moveCommand);
514 } else {
515 //reuse existing move command
516 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
517 }
518 }
519 }
520
521 mapView.repaint();
522 }
523 }
524
525 /**
526 * Does anything that needs to be done, then switches back to select mode.
527 * @param e current mouse event
528 */
529 @Override
530 public void mouseReleased(MouseEvent e) {
531
532 MapView mapView = MainApplication.getMap().mapView;
533 if (!mapView.isActiveLayerVisible())
534 return;
535
536 if (mode == Mode.select) {
537 // Nothing to be done
538 } else {
539 if (mode == Mode.create_new) {
540 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
541 createNewRectangle();
542 }
543 } else if (mode == Mode.extrude) {
544 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
545 // double click adds a new node
546 addNewNode(e);
547 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
548 try {
549 // main extrusion commands
550 performExtrusion();
551 } catch (DataIntegrityProblemException ex) {
552 // Can occur if calling undo while extruding, see #12870
553 Logging.error(ex);
554 }
555 }
556 } else if (mode == Mode.translate || mode == Mode.translate_node) {
557 //Commit translate
558 //the move command is already committed in mouseDragged
559 joinNodesIfCollapsed(movingNodeList);
560 }
561
562 updateKeyModifiers(e);
563 // Switch back into select mode
564 mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
565 mapView.removeTemporaryLayer(this);
566 selectedSegment = null;
567 moveCommand = null;
568 mode = Mode.select;
569 dualAlignSegmentCollapsed = false;
570 updateStatusLine();
571 mapView.repaint();
572 }
573 }
574
575 // -------------------------------------------------------------------------
576 // Custom methods
577 // -------------------------------------------------------------------------
578
579 /**
580 * Inserts node into nearby segment.
581 * @param e current mouse point
582 */
583 private static void addNewNode(MouseEvent e) {
584 // Should maybe do the same as in DrawAction and fetch all nearby segments?
585 MapView mapView = MainApplication.getMap().mapView;
586 WaySegment ws = mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
587 if (ws != null) {
588 Node n = new Node(mapView.getLatLon(e.getX(), e.getY()));
589 EastNorth a = ws.getFirstNode().getEastNorth();
590 EastNorth b = ws.getSecondNode().getEastNorth();
591 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
592 Way wnew = new Way(ws.way);
593 wnew.addNode(ws.lowerIndex+1, n);
594 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
595 new AddCommand(n), new ChangeCommand(ws.way, wnew));
596 MainApplication.undoRedo.add(cmds);
597 }
598 }
599
600 /**
601 * Creates a new way that shares segment with selected way.
602 */
603 private void createNewRectangle() {
604 if (selectedSegment == null) return;
605 // crete a new rectangle
606 Collection<Command> cmds = new LinkedList<>();
607 Node third = new Node(newN2en);
608 Node fourth = new Node(newN1en);
609 Way wnew = new Way();
610 wnew.addNode(selectedSegment.getFirstNode());
611 wnew.addNode(selectedSegment.getSecondNode());
612 wnew.addNode(third);
613 if (!dualAlignSegmentCollapsed) {
614 // rectangle can degrade to triangle for dual alignment after collapsing
615 wnew.addNode(fourth);
616 }
617 // ... and close the way
618 wnew.addNode(selectedSegment.getFirstNode());
619 // undo support
620 cmds.add(new AddCommand(third));
621 if (!dualAlignSegmentCollapsed) {
622 cmds.add(new AddCommand(fourth));
623 }
624 cmds.add(new AddCommand(wnew));
625 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
626 MainApplication.undoRedo.add(c);
627 getLayerManager().getEditDataSet().setSelected(wnew);
628 }
629
630 /**
631 * Does actual extrusion of {@link #selectedSegment}.
632 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
633 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
634 */
635 private void performExtrusion() {
636 // create extrusion
637 Collection<Command> cmds = new LinkedList<>();
638 Way wnew = new Way(selectedSegment.way);
639 boolean wayWasModified = false;
640 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
641 int insertionPoint = selectedSegment.lowerIndex + 1;
642
643 //find if the new points overlap existing segments (in case of 90 degree angles)
644 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
645 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
646 // segmentAngleZero marks subset of nodeOverlapsSegment.
647 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
648 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
649 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
650 List<Node> changedNodes = new ArrayList<>();
651 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
652 //move existing node
653 Node n1Old = selectedSegment.getFirstNode();
654 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
655 changedNodes.add(n1Old);
656 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
657 // replace shared node with new one
658 Node n1Old = selectedSegment.getFirstNode();
659 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
660 wnew.addNode(insertionPoint, n1New);
661 wnew.removeNode(n1Old);
662 wayWasModified = true;
663 cmds.add(new AddCommand(n1New));
664 changedNodes.add(n1New);
665 } else {
666 //introduce new node
667 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
668 wnew.addNode(insertionPoint, n1New);
669 wayWasModified = true;
670 insertionPoint++;
671 cmds.add(new AddCommand(n1New));
672 changedNodes.add(n1New);
673 }
674
675 //find if the new points overlap existing segments (in case of 90 degree angles)
676 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
677 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
678 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
679 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
680
681 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
682 //move existing node
683 Node n2Old = selectedSegment.getSecondNode();
684 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
685 changedNodes.add(n2Old);
686 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
687 // replace shared node with new one
688 Node n2Old = selectedSegment.getSecondNode();
689 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
690 wnew.addNode(insertionPoint, n2New);
691 wnew.removeNode(n2Old);
692 wayWasModified = true;
693 cmds.add(new AddCommand(n2New));
694 changedNodes.add(n2New);
695 } else {
696 //introduce new node
697 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
698 wnew.addNode(insertionPoint, n2New);
699 wayWasModified = true;
700 cmds.add(new AddCommand(n2New));
701 changedNodes.add(n2New);
702 }
703
704 //the way was a single segment, close the way
705 if (wayWasSingleSegment) {
706 wnew.addNode(selectedSegment.getFirstNode());
707 wayWasModified = true;
708 }
709 if (wayWasModified) {
710 // we only need to change the way if its node list was really modified
711 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
712 }
713 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
714 MainApplication.undoRedo.add(c);
715 joinNodesIfCollapsed(changedNodes);
716 }
717
718 private void joinNodesIfCollapsed(List<Node> changedNodes) {
719 if (!dualAlignActive || newN1en == null || newN2en == null) return;
720 if (newN1en.distance(newN2en) > 1e-6) return;
721 // If the dual alignment moved two nodes to the same point, merge them
722 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
723 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
724 Command mergeCmd = MergeNodesAction.mergeNodes(MainApplication.getLayerManager().getEditLayer(), changedNodes, targetNode, locNode);
725 if (mergeCmd != null) {
726 MainApplication.undoRedo.add(mergeCmd);
727 } else {
728 // undo extruding command itself
729 MainApplication.undoRedo.undo();
730 }
731 }
732
733 /**
734 * This method tests if {@code node} has other ways apart from the given one.
735 * @param node node to test
736 * @param myWay way known to contain this node
737 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
738 */
739 private static boolean hasNodeOtherWays(Node node, Way myWay) {
740 for (OsmPrimitive p : node.getReferrers()) {
741 if (p instanceof Way && p.isUsable() && p != myWay)
742 return true;
743 }
744 return false;
745 }
746
747 /**
748 * Determines best movement from {@link #initialMousePos} to current mouse position,
749 * choosing one of the directions from {@link #possibleMoveDirections}.
750 * @param mouseEn current mouse position
751 * @return movement vector
752 */
753 private EastNorth calculateBestMovement(EastNorth mouseEn) {
754
755 EastNorth initialMouseEn = MainApplication.getMap().mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
756 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
757
758 double bestDistance = Double.POSITIVE_INFINITY;
759 EastNorth bestMovement = null;
760 activeMoveDirection = null;
761
762 //find the best movement direction and vector
763 for (ReferenceSegment direction : possibleMoveDirections) {
764 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
765 if (movement == null) {
766 //if direction parallel to segment.
767 continue;
768 }
769
770 double distanceFromMouseMovement = movement.distance(mouseMovement);
771 if (bestDistance > distanceFromMouseMovement) {
772 bestDistance = distanceFromMouseMovement;
773 activeMoveDirection = direction;
774 bestMovement = movement;
775 }
776 }
777 return bestMovement;
778 }
779
780 /***
781 * This method calculates offset amount by which to move the given segment
782 * perpendicularly for it to be in line with mouse position.
783 * @param segmentP1 segment's first point
784 * @param segmentP2 segment's second point
785 * @param moveDirection direction of movement
786 * @param targetPos mouse position
787 * @return offset amount of P1 and P2.
788 */
789 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
790 EastNorth targetPos) {
791 EastNorth intersectionPoint;
792 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
793 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
794 } else {
795 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
796 }
797
798 if (intersectionPoint == null)
799 return null;
800 else
801 //return distance form base to target position
802 return targetPos.subtract(intersectionPoint);
803 }
804
805 /**
806 * Gathers possible move directions - perpendicular to the selected segment
807 * and parallel to neighboring segments.
808 */
809 private void calculatePossibleDirectionsBySegment() {
810 // remember initial positions for segment nodes.
811 initialN1en = selectedSegment.getFirstNode().getEastNorth();
812 initialN2en = selectedSegment.getSecondNode().getEastNorth();
813
814 //add direction perpendicular to the selected segment
815 possibleMoveDirections = new ArrayList<>();
816 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
817 initialN1en.getY() - initialN2en.getY(),
818 initialN2en.getX() - initialN1en.getX()
819 ), initialN1en, initialN2en, true));
820
821
822 //add directions parallel to neighbor segments
823 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
824 if (prevNode != null) {
825 EastNorth en = prevNode.getEastNorth();
826 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
827 initialN1en.getX() - en.getX(),
828 initialN1en.getY() - en.getY()
829 ), initialN1en, en, false));
830 }
831
832 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
833 if (nextNode != null) {
834 EastNorth en = nextNode.getEastNorth();
835 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
836 initialN2en.getX() - en.getX(),
837 initialN2en.getY() - en.getY()
838 ), initialN2en, en, false));
839 }
840 }
841
842 /**
843 * Gathers possible move directions - along all adjacent segments.
844 */
845 private void calculatePossibleDirectionsByNode() {
846 // remember initial positions for segment nodes.
847 initialN1en = selectedNode.getEastNorth();
848 initialN2en = initialN1en;
849 possibleMoveDirections = new ArrayList<>();
850 for (OsmPrimitive p: selectedNode.getReferrers()) {
851 if (p instanceof Way && p.isUsable()) {
852 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
853 EastNorth en = neighbor.getEastNorth();
854 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
855 initialN1en.getX() - en.getX(),
856 initialN1en.getY() - en.getY()
857 ), initialN1en, en, false));
858 }
859 }
860 }
861 }
862
863 /**
864 * Checks dual alignment conditions:
865 * 1. selected segment has both neighboring segments,
866 * 2. selected segment is not parallel with neighboring segments.
867 * @return {@code true} if dual alignment conditions are satisfied
868 */
869 private boolean checkDualAlignConditions() {
870 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
871 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
872 if (prevNode == null || nextNode == null) {
873 return false;
874 }
875
876 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
877 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
878 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
879 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
880 return false;
881 }
882
883 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
884 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
885 return !prevSegmentParallel && !nextSegmentParallel;
886 }
887
888 /**
889 * Gathers possible move directions - perpendicular to the selected segment only.
890 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
891 */
892 private void calculatePossibleDirectionsForDualAlign() {
893 // remember initial positions for segment nodes.
894 initialN1en = selectedSegment.getFirstNode().getEastNorth();
895 initialN2en = selectedSegment.getSecondNode().getEastNorth();
896
897 // add direction perpendicular to the selected segment
898 possibleMoveDirections = new ArrayList<>();
899 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
900 initialN1en.getY() - initialN2en.getY(),
901 initialN2en.getX() - initialN1en.getX()
902 ), initialN1en, initialN2en, true));
903
904 // set neighboring segments
905 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
906 if (prevNode != null) {
907 EastNorth prevNodeEn = prevNode.getEastNorth();
908 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
909 initialN1en.getX() - prevNodeEn.getX(),
910 initialN1en.getY() - prevNodeEn.getY()
911 ), initialN1en, prevNodeEn, false);
912 }
913
914 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
915 if (nextNode != null) {
916 EastNorth nextNodeEn = nextNode.getEastNorth();
917 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
918 initialN2en.getX() - nextNodeEn.getX(),
919 initialN2en.getY() - nextNodeEn.getY()
920 ), initialN2en, nextNodeEn, false);
921 }
922 }
923
924 /**
925 * Calculate newN1en, newN2en best suitable for given mouse coordinates
926 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
927 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
928 * @param mouseEn mouse coordinates
929 * @return best movement vector
930 */
931 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
932 EastNorth bestMovement = calculateBestMovement(mouseEn);
933 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
934
935 // find out the movement distance, in metres
936 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
937 Main.getProjection().eastNorth2latlon(n1movedEn));
938 MainApplication.getMap().statusLine.setDist(distance);
939 updateStatusLine();
940
941 if (dualAlignActive) {
942 // new positions of selected segment's nodes, without applying dual alignment
943 n1movedEn = initialN1en.add(bestMovement);
944 n2movedEn = initialN2en.add(bestMovement);
945
946 // calculate intersections of parallel shifted segment and the adjacent lines
947 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
948 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
949 if (newN1en == null || newN2en == null) return bestMovement;
950 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
951 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
952 dualAlignSegment2.p1, dualAlignSegment2.p2);
953 newN1en = collapsedSegmentPosition;
954 newN2en = collapsedSegmentPosition;
955 dualAlignSegmentCollapsed = true;
956 } else {
957 dualAlignSegmentCollapsed = false;
958 }
959 } else {
960 newN1en = n1movedEn;
961 newN2en = initialN2en.add(bestMovement);
962 }
963 return bestMovement;
964 }
965
966 /**
967 * Gets a node index from selected way before given index.
968 * @param index index of current node
969 * @return index of previous node or <code>-1</code> if there are no nodes there.
970 */
971 private int getPreviousNodeIndex(int index) {
972 if (index > 0)
973 return index - 1;
974 else if (selectedSegment.way.isClosed())
975 return selectedSegment.way.getNodesCount() - 2;
976 else
977 return -1;
978 }
979
980 /**
981 * Gets a node from selected way before given index.
982 * @param index index of current node
983 * @return previous node or <code>null</code> if there are no nodes there.
984 */
985 private Node getPreviousNode(int index) {
986 int indexPrev = getPreviousNodeIndex(index);
987 if (indexPrev >= 0)
988 return selectedSegment.way.getNode(indexPrev);
989 else
990 return null;
991 }
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 Line2D normline;
1094 Point2D centerpoint = mv.getPoint2D(p1.interpolate(p2, .5));
1095 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1096 g2.draw(normline);
1097 // Draw right angle marker on initial position, only when moving at right angle
1098 if (activeMoveDirection.perpendicular) {
1099 // EastNorth units per pixel
1100 g2.setStroke(helperStrokeRA);
1101 g2.setColor(mainColor);
1102 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1103 }
1104 }
1105 }
1106 }
1107 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1108 }
1109 }
1110
1111 private Point2D getNormalUniVector() {
1112 double fac = 1.0 / activeMoveDirection.en.length();
1113 // mult by factor to get unit vector.
1114 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1115
1116 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1117 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1118 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1119 // If not, use a sign-flipped version of the normalUnitVector.
1120 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1121 }
1122
1123 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1124 //This is normally done by MapView.getPoint, but it does not work on vectors.
1125 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1126 return normalUnitVector;
1127 }
1128
1129 /**
1130 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1131 * @param from1 vector1 start
1132 * @param to1 vector1 end
1133 * @param from2 vector2 start
1134 * @param to2 vector2 end
1135 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1136 */
1137 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1138 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1139 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1140 }
1141
1142 /**
1143 * Draws right angle symbol at specified position.
1144 * @param g2 the Graphics2D object used to draw on
1145 * @param center center point of angle
1146 * @param normal vector of normal
1147 * @param mirror {@code true} if symbol should be mirrored by the normal
1148 */
1149 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1150 // EastNorth units per pixel
1151 double factor = 1.0/g2.getTransform().getScaleX();
1152 double raoffsetx = symbolSize*factor*normal.getX();
1153 double raoffsety = symbolSize*factor*normal.getY();
1154
1155 double cx = center.getX(), cy = center.getY();
1156 double k = mirror ? -1 : 1;
1157 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1158 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1159 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1160
1161 GeneralPath ra = new GeneralPath();
1162 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1163 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1164 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1165 g2.setStroke(helperStrokeRA);
1166 g2.draw(ra);
1167 }
1168
1169 /**
1170 * Draws given reference segment.
1171 * @param g2 the Graphics2D object used to draw on
1172 * @param mv map view
1173 * @param seg the reference segment
1174 */
1175 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1176 g2.setColor(helperColor);
1177 g2.setStroke(helperStrokeDash);
1178 g2.draw(new MapViewPath(mv).moveTo(seg.p1).lineTo(seg.p2));
1179 }
1180
1181 /**
1182 * Creates a new Line that extends off the edge of the viewport in one direction
1183 * @param start The start point of the line
1184 * @param unitvector A unit vector denoting the direction of the line
1185 * @param g the Graphics2D object it will be used on
1186 * @return created line
1187 */
1188 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1189 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1190 try {
1191 AffineTransform invtrans = g.getTransform().createInverse();
1192 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1193 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1194
1195 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1196 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1197 // This can be used as a safe length of line to generate which will always go off-viewport.
1198 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1199 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1200
1201 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1202 + (unitvector.getY() * linelength)));
1203 } catch (NoninvertibleTransformException e) {
1204 Logging.debug(e);
1205 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1206 + (unitvector.getY() * 10)));
1207 }
1208 }
1209}
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