source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 11462

Last change on this file since 11462 was 11462, checked in by Don-vip, 8 years ago

sonar - squid:S1871 - Two branches in the same conditional structure should not have exactly the same implementation
  • Property svn:eol-style set to native
File size: 50.5 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.Node;
42import org.openstreetmap.josm.data.osm.OsmPrimitive;
43import org.openstreetmap.josm.data.osm.Way;
44import org.openstreetmap.josm.data.osm.WaySegment;
45import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
46import org.openstreetmap.josm.data.preferences.ColorProperty;
47import org.openstreetmap.josm.gui.MainMenu;
48import org.openstreetmap.josm.gui.MapFrame;
49import org.openstreetmap.josm.gui.MapView;
50import org.openstreetmap.josm.gui.draw.MapViewPath;
51import org.openstreetmap.josm.gui.draw.SymbolShape;
52import org.openstreetmap.josm.gui.layer.Layer;
53import org.openstreetmap.josm.gui.layer.MapViewPaintable;
54import org.openstreetmap.josm.gui.layer.OsmDataLayer;
55import org.openstreetmap.josm.gui.util.GuiHelper;
56import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
57import org.openstreetmap.josm.gui.util.ModifierListener;
58import org.openstreetmap.josm.tools.Geometry;
59import org.openstreetmap.josm.tools.ImageProvider;
60import org.openstreetmap.josm.tools.Shortcut;
61
62/**
63 * Makes a rectangle from a line, or modifies a rectangle.
64 */
65public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierListener {
66
67 enum Mode { extrude, translate, select, create_new, translate_node }
68
69 private Mode mode = Mode.select;
70
71 /**
72 * If {@code true}, when extruding create new node(s) even if segments are parallel.
73 */
74 private boolean alwaysCreateNodes;
75 private boolean nodeDragWithoutCtrl;
76
77 private long mouseDownTime;
78 private transient WaySegment selectedSegment;
79 private transient Node selectedNode;
80 private Color mainColor;
81 private transient Stroke mainStroke;
82
83 /** settings value whether shared nodes should be ignored or not */
84 private boolean ignoreSharedNodes;
85
86 private boolean keepSegmentDirection;
87
88 /**
89 * drawing settings for helper lines
90 */
91 private Color helperColor;
92 private transient Stroke helperStrokeDash;
93 private transient Stroke helperStrokeRA;
94
95 private transient Stroke oldLineStroke;
96 private double symbolSize;
97 /**
98 * Possible directions to move to.
99 */
100 private transient List<ReferenceSegment> possibleMoveDirections;
101
102
103 /**
104 * Collection of nodes that is moved
105 */
106 private transient List<Node> movingNodeList;
107
108 /**
109 * The direction that is currently active.
110 */
111 private transient ReferenceSegment activeMoveDirection;
112
113 /**
114 * The position of the mouse cursor when the drag action was initiated.
115 */
116 private Point initialMousePos;
117 /**
118 * The time which needs to pass between click and release before something
119 * counts as a move, in milliseconds
120 */
121 private int initialMoveDelay = 200;
122 /**
123 * The minimal shift of mouse (in pixels) befire something counts as move
124 */
125 private int initialMoveThreshold = 1;
126
127 /**
128 * The initial EastNorths of node1 and node2
129 */
130 private EastNorth initialN1en;
131 private EastNorth initialN2en;
132 /**
133 * The new EastNorths of node1 and node2
134 */
135 private EastNorth newN1en;
136 private EastNorth newN2en;
137
138 /**
139 * the command that performed last move.
140 */
141 private transient MoveCommand moveCommand;
142 /**
143 * The command used for dual alignment movement.
144 * Needs to be separate, due to two nodes moving in different directions.
145 */
146 private transient MoveCommand moveCommand2;
147
148 /** The cursor for the 'create_new' mode. */
149 private final Cursor cursorCreateNew;
150
151 /** The cursor for the 'translate' mode. */
152 private final Cursor cursorTranslate;
153
154 /** The cursor for the 'alwaysCreateNodes' submode. */
155 private final Cursor cursorCreateNodes;
156
157 private static class ReferenceSegment {
158 public final EastNorth en;
159 public final EastNorth p1;
160 public final EastNorth p2;
161 public final boolean perpendicular;
162
163 ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
164 this.en = en;
165 this.p1 = p1;
166 this.p2 = p2;
167 this.perpendicular = perpendicular;
168 }
169
170 @Override
171 public String toString() {
172 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + ']';
173 }
174 }
175
176 // Dual alignment mode stuff
177 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
178 private boolean dualAlignEnabled;
179 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met.
180 * Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
181 private boolean dualAlignActive;
182 /** Dual alignment reference segments */
183 private transient ReferenceSegment dualAlignSegment1, dualAlignSegment2;
184 /** {@code true}, if new segment was collapsed */
185 private boolean dualAlignSegmentCollapsed;
186 // Dual alignment UI stuff
187 private final DualAlignChangeAction dualAlignChangeAction;
188 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
189 private final transient Shortcut dualAlignShortcut;
190 private boolean useRepeatedShortcut;
191 private boolean ignoreNextKeyRelease;
192
193 private class DualAlignChangeAction extends JosmAction {
194 DualAlignChangeAction() {
195 super(tr("Dual alignment"), /* ICON() */ "mapmode/extrude/dualalign",
196 tr("Switch dual alignment mode while extruding"), null, false);
197 putValue("help", ht("/Action/Extrude#DualAlign"));
198 }
199
200 @Override
201 public void actionPerformed(ActionEvent e) {
202 toggleDualAlign();
203 }
204
205 @Override
206 protected void updateEnabledState() {
207 setEnabled(Main.map != null && Main.map.mapMode instanceof ExtrudeAction);
208 }
209 }
210
211 /**
212 * Creates a new ExtrudeAction
213 * @param mapFrame The MapFrame this action belongs to.
214 */
215 public ExtrudeAction(MapFrame mapFrame) {
216 super(tr("Extrude"), /* ICON(mapmode/) */ "extrude/extrude", tr("Create areas"),
217 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
218 mapFrame,
219 ImageProvider.getCursor("normal", "rectangle"));
220 putValue("help", ht("/Action/Extrude"));
221 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
222 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
223 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
224
225 dualAlignEnabled = false;
226 dualAlignChangeAction = new DualAlignChangeAction();
227 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
228 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
229 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
230 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
231 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
232 readPreferences(); // to show prefernces in table before entering the mode
233 }
234
235 @Override
236 public void destroy() {
237 super.destroy();
238 dualAlignChangeAction.destroy();
239 }
240
241 private JCheckBoxMenuItem addDualAlignMenuItem() {
242 int n = Main.main.menu.editMenu.getItemCount();
243 for (int i = n-1; i > 0; i--) {
244 JMenuItem item = Main.main.menu.editMenu.getItem(i);
245 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
246 Main.main.menu.editMenu.remove(i);
247 }
248 }
249 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
250 }
251
252 // -------------------------------------------------------------------------
253 // Mode methods
254 // -------------------------------------------------------------------------
255
256 @Override
257 public String getModeHelpText() {
258 StringBuilder rv;
259 if (mode == Mode.select) {
260 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
261 "Alt-drag to create a new rectangle, double click to add a new node."));
262 if (dualAlignEnabled) {
263 rv.append(' ').append(tr("Dual alignment active."));
264 if (dualAlignSegmentCollapsed)
265 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
266 }
267 } else {
268 if (mode == Mode.translate)
269 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
270 else if (mode == Mode.translate_node)
271 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
272 else if (mode == Mode.extrude || mode == Mode.create_new)
273 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
274 else {
275 Main.warn("Extrude: unknown mode " + mode);
276 rv = new StringBuilder();
277 }
278 if (dualAlignActive) {
279 rv.append(' ').append(tr("Dual alignment active."));
280 if (dualAlignSegmentCollapsed) {
281 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
282 }
283 }
284 }
285 return rv.toString();
286 }
287
288 @Override
289 public boolean layerIsSupported(Layer l) {
290 return l instanceof OsmDataLayer;
291 }
292
293 @Override
294 public void enterMode() {
295 super.enterMode();
296 Main.map.mapView.addMouseListener(this);
297 Main.map.mapView.addMouseMotionListener(this);
298 ignoreNextKeyRelease = true;
299 Main.map.keyDetector.addKeyListener(this);
300 Main.map.keyDetector.addModifierListener(this);
301 }
302
303 @Override
304 protected void readPreferences() {
305 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
306 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
307 mainColor = new ColorProperty(marktr("Extrude: main line"), (Color) null).get();
308 if (mainColor == null) mainColor = PaintColors.SELECTED.get();
309 helperColor = new ColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
310 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
311 helperStrokeRA = new BasicStroke(1);
312 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
313 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
314 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
315 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
316
317 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
318 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
319 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
320 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
321 }
322
323 @Override
324 public void exitMode() {
325 Main.map.mapView.removeMouseListener(this);
326 Main.map.mapView.removeMouseMotionListener(this);
327 Main.map.mapView.removeTemporaryLayer(this);
328 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
329 Main.map.keyDetector.removeKeyListener(this);
330 Main.map.keyDetector.removeModifierListener(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 modifiersChanged(int modifiers) {
343 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
344 return;
345 updateKeyModifiers(modifiers);
346 if (mode == Mode.select) {
347 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
348 }
349 }
350
351 @Override
352 public void doKeyPressed(KeyEvent e) {
353 // Do nothing
354 }
355
356 @Override
357 public void doKeyReleased(KeyEvent e) {
358 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
359 return;
360 if (ignoreNextKeyRelease) {
361 ignoreNextKeyRelease = false;
362 } else {
363 toggleDualAlign();
364 }
365 }
366
367 /**
368 * Toggles dual alignment mode.
369 */
370 private void toggleDualAlign() {
371 dualAlignEnabled = !dualAlignEnabled;
372 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
373 updateStatusLine();
374 }
375
376 /**
377 * If the left mouse button is pressed over a segment or a node, switches
378 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
379 * {@link #dualAlignEnabled}.
380 * @param e current mouse event
381 */
382 @Override
383 public void mousePressed(MouseEvent e) {
384 if (!Main.map.mapView.isActiveLayerVisible())
385 return;
386 if (!(Boolean) this.getValue("active"))
387 return;
388 if (e.getButton() != MouseEvent.BUTTON1)
389 return;
390
391 requestFocusInMapView();
392 updateKeyModifiers(e);
393
394 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive::isSelectable);
395 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
396
397 // If nothing gets caught, stay in select mode
398 if (selectedSegment == null && selectedNode == null) return;
399
400 if (selectedNode != null) {
401 if (ctrl || nodeDragWithoutCtrl) {
402 movingNodeList = new ArrayList<>();
403 movingNodeList.add(selectedNode);
404 calculatePossibleDirectionsByNode();
405 if (possibleMoveDirections.isEmpty()) {
406 // if no directions fould, do not enter dragging mode
407 return;
408 }
409 mode = Mode.translate_node;
410 dualAlignActive = false;
411 }
412 } else {
413 // Otherwise switch to another mode
414 if (dualAlignEnabled && checkDualAlignConditions()) {
415 dualAlignActive = true;
416 calculatePossibleDirectionsForDualAlign();
417 dualAlignSegmentCollapsed = false;
418 } else {
419 dualAlignActive = false;
420 calculatePossibleDirectionsBySegment();
421 }
422 if (ctrl) {
423 mode = Mode.translate;
424 movingNodeList = new ArrayList<>();
425 movingNodeList.add(selectedSegment.getFirstNode());
426 movingNodeList.add(selectedSegment.getSecondNode());
427 } else if (alt) {
428 mode = Mode.create_new;
429 // create a new segment and then select and extrude the new segment
430 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
431 alwaysCreateNodes = true;
432 } else {
433 mode = Mode.extrude;
434 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
435 alwaysCreateNodes = shift;
436 }
437 }
438
439 // Signifies that nothing has happened yet
440 newN1en = null;
441 newN2en = null;
442 moveCommand = null;
443 moveCommand2 = null;
444
445 Main.map.mapView.addTemporaryLayer(this);
446
447 updateStatusLine();
448 Main.map.mapView.repaint();
449
450 // Make note of time pressed
451 mouseDownTime = System.currentTimeMillis();
452
453 // Make note of mouse position
454 initialMousePos = e.getPoint();
455 }
456
457 /**
458 * Performs action depending on what {@link #mode} we're in.
459 * @param e current mouse event
460 */
461 @Override
462 public void mouseDragged(MouseEvent e) {
463 if (!Main.map.mapView.isActiveLayerVisible())
464 return;
465
466 // do not count anything as a drag if it lasts less than 100 milliseconds.
467 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
468 return;
469
470 if (mode == Mode.select) {
471 // Just sit tight and wait for mouse to be released.
472 } else {
473 //move, create new and extrude mode - move the selected segment
474
475 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
476 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
477
478 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
479
480 if (dualAlignActive) {
481 if (mode == Mode.extrude || mode == Mode.create_new) {
482 // nothing here
483 } else if (mode == Mode.translate) {
484 EastNorth movement1 = newN1en.subtract(initialN1en);
485 EastNorth movement2 = newN2en.subtract(initialN2en);
486 // move nodes to new position
487 if (moveCommand == null || moveCommand2 == null) {
488 // make a new move commands
489 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
490 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
491 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
492 Main.main.undoRedo.add(c);
493 } else {
494 // reuse existing move commands
495 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
496 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
497 }
498 }
499 } else if (bestMovement != null) {
500 if (mode == Mode.extrude || mode == Mode.create_new) {
501 //nothing here
502 } else if (mode == Mode.translate_node || mode == Mode.translate) {
503 //move nodes to new position
504 if (moveCommand == null) {
505 //make a new move command
506 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
507 Main.main.undoRedo.add(moveCommand);
508 } else {
509 //reuse existing move command
510 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
511 }
512 }
513 }
514
515 Main.map.mapView.repaint();
516 }
517 }
518
519 /**
520 * Does anything that needs to be done, then switches back to select mode.
521 * @param e current mouse event
522 */
523 @Override
524 public void mouseReleased(MouseEvent e) {
525
526 if (!Main.map.mapView.isActiveLayerVisible())
527 return;
528
529 if (mode == Mode.select) {
530 // Nothing to be done
531 } else {
532 if (mode == Mode.create_new) {
533 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
534 createNewRectangle();
535 }
536 } else if (mode == Mode.extrude) {
537 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
538 // double click adds a new node
539 addNewNode(e);
540 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
541 // main extrusion commands
542 performExtrusion();
543 }
544 } else if (mode == Mode.translate || mode == Mode.translate_node) {
545 //Commit translate
546 //the move command is already committed in mouseDragged
547 joinNodesIfCollapsed(movingNodeList);
548 }
549
550 updateKeyModifiers(e);
551 // Switch back into select mode
552 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
553 Main.map.mapView.removeTemporaryLayer(this);
554 selectedSegment = null;
555 moveCommand = null;
556 mode = Mode.select;
557 dualAlignSegmentCollapsed = false;
558 updateStatusLine();
559 Main.map.mapView.repaint();
560 }
561 }
562
563 // -------------------------------------------------------------------------
564 // Custom methods
565 // -------------------------------------------------------------------------
566
567 /**
568 * Inserts node into nearby segment.
569 * @param e current mouse point
570 */
571 private static void addNewNode(MouseEvent e) {
572 // Should maybe do the same as in DrawAction and fetch all nearby segments?
573 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
574 if (ws != null) {
575 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
576 EastNorth a = ws.getFirstNode().getEastNorth();
577 EastNorth b = ws.getSecondNode().getEastNorth();
578 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
579 Way wnew = new Way(ws.way);
580 wnew.addNode(ws.lowerIndex+1, n);
581 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
582 new AddCommand(n), new ChangeCommand(ws.way, wnew));
583 Main.main.undoRedo.add(cmds);
584 }
585 }
586
587 /**
588 * Creates a new way that shares segment with selected way.
589 */
590 private void createNewRectangle() {
591 if (selectedSegment == null) return;
592 // crete a new rectangle
593 Collection<Command> cmds = new LinkedList<>();
594 Node third = new Node(newN2en);
595 Node fourth = new Node(newN1en);
596 Way wnew = new Way();
597 wnew.addNode(selectedSegment.getFirstNode());
598 wnew.addNode(selectedSegment.getSecondNode());
599 wnew.addNode(third);
600 if (!dualAlignSegmentCollapsed) {
601 // rectangle can degrade to triangle for dual alignment after collapsing
602 wnew.addNode(fourth);
603 }
604 // ... and close the way
605 wnew.addNode(selectedSegment.getFirstNode());
606 // undo support
607 cmds.add(new AddCommand(third));
608 if (!dualAlignSegmentCollapsed) {
609 cmds.add(new AddCommand(fourth));
610 }
611 cmds.add(new AddCommand(wnew));
612 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
613 Main.main.undoRedo.add(c);
614 getLayerManager().getEditDataSet().setSelected(wnew);
615 }
616
617 /**
618 * Does actual extrusion of {@link #selectedSegment}.
619 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
620 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
621 */
622 private void performExtrusion() {
623 // create extrusion
624 Collection<Command> cmds = new LinkedList<>();
625 Way wnew = new Way(selectedSegment.way);
626 boolean wayWasModified = false;
627 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
628 int insertionPoint = selectedSegment.lowerIndex + 1;
629
630 //find if the new points overlap existing segments (in case of 90 degree angles)
631 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
632 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
633 // segmentAngleZero marks subset of nodeOverlapsSegment.
634 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
635 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
636 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
637 List<Node> changedNodes = new ArrayList<>();
638 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
639 //move existing node
640 Node n1Old = selectedSegment.getFirstNode();
641 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
642 changedNodes.add(n1Old);
643 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
644 // replace shared node with new one
645 Node n1Old = selectedSegment.getFirstNode();
646 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
647 wnew.addNode(insertionPoint, n1New);
648 wnew.removeNode(n1Old);
649 wayWasModified = true;
650 cmds.add(new AddCommand(n1New));
651 changedNodes.add(n1New);
652 } else {
653 //introduce new node
654 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
655 wnew.addNode(insertionPoint, n1New);
656 wayWasModified = true;
657 insertionPoint++;
658 cmds.add(new AddCommand(n1New));
659 changedNodes.add(n1New);
660 }
661
662 //find if the new points overlap existing segments (in case of 90 degree angles)
663 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
664 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
665 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
666 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
667
668 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
669 //move existing node
670 Node n2Old = selectedSegment.getSecondNode();
671 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
672 changedNodes.add(n2Old);
673 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
674 // replace shared node with new one
675 Node n2Old = selectedSegment.getSecondNode();
676 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
677 wnew.addNode(insertionPoint, n2New);
678 wnew.removeNode(n2Old);
679 wayWasModified = true;
680 cmds.add(new AddCommand(n2New));
681 changedNodes.add(n2New);
682 } else {
683 //introduce new node
684 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
685 wnew.addNode(insertionPoint, n2New);
686 wayWasModified = true;
687 cmds.add(new AddCommand(n2New));
688 changedNodes.add(n2New);
689 }
690
691 //the way was a single segment, close the way
692 if (wayWasSingleSegment) {
693 wnew.addNode(selectedSegment.getFirstNode());
694 wayWasModified = true;
695 }
696 if (wayWasModified) {
697 // we only need to change the way if its node list was really modified
698 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
699 }
700 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
701 Main.main.undoRedo.add(c);
702 joinNodesIfCollapsed(changedNodes);
703 }
704
705 private void joinNodesIfCollapsed(List<Node> changedNodes) {
706 if (!dualAlignActive || newN1en == null || newN2en == null) return;
707 if (newN1en.distance(newN2en) > 1e-6) return;
708 // If the dual alignment moved two nodes to the same point, merge them
709 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
710 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
711 Command mergeCmd = MergeNodesAction.mergeNodes(Main.getLayerManager().getEditLayer(), changedNodes, targetNode, locNode);
712 if (mergeCmd != null) {
713 Main.main.undoRedo.add(mergeCmd);
714 } else {
715 // undo extruding command itself
716 Main.main.undoRedo.undo();
717 }
718 }
719
720 /**
721 * This method tests if {@code node} has other ways apart from the given one.
722 * @param node node to test
723 * @param myWay way known to contain this node
724 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
725 */
726 private static boolean hasNodeOtherWays(Node node, Way myWay) {
727 for (OsmPrimitive p : node.getReferrers()) {
728 if (p instanceof Way && p.isUsable() && p != myWay)
729 return true;
730 }
731 return false;
732 }
733
734 /**
735 * Determines best movement from {@link #initialMousePos} to current mouse position,
736 * choosing one of the directions from {@link #possibleMoveDirections}.
737 * @param mouseEn current mouse position
738 * @return movement vector
739 */
740 private EastNorth calculateBestMovement(EastNorth mouseEn) {
741
742 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
743 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
744
745 double bestDistance = Double.POSITIVE_INFINITY;
746 EastNorth bestMovement = null;
747 activeMoveDirection = null;
748
749 //find the best movement direction and vector
750 for (ReferenceSegment direction : possibleMoveDirections) {
751 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
752 if (movement == null) {
753 //if direction parallel to segment.
754 continue;
755 }
756
757 double distanceFromMouseMovement = movement.distance(mouseMovement);
758 if (bestDistance > distanceFromMouseMovement) {
759 bestDistance = distanceFromMouseMovement;
760 activeMoveDirection = direction;
761 bestMovement = movement;
762 }
763 }
764 return bestMovement;
765 }
766
767 /***
768 * This method calculates offset amount by which to move the given segment
769 * perpendicularly for it to be in line with mouse position.
770 * @param segmentP1 segment's first point
771 * @param segmentP2 segment's second point
772 * @param moveDirection direction of movement
773 * @param targetPos mouse position
774 * @return offset amount of P1 and P2.
775 */
776 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
777 EastNorth targetPos) {
778 EastNorth intersectionPoint;
779 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
780 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
781 } else {
782 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
783 }
784
785 if (intersectionPoint == null)
786 return null;
787 else
788 //return distance form base to target position
789 return targetPos.subtract(intersectionPoint);
790 }
791
792 /**
793 * Gathers possible move directions - perpendicular to the selected segment
794 * and parallel to neighboring segments.
795 */
796 private void calculatePossibleDirectionsBySegment() {
797 // remember initial positions for segment nodes.
798 initialN1en = selectedSegment.getFirstNode().getEastNorth();
799 initialN2en = selectedSegment.getSecondNode().getEastNorth();
800
801 //add direction perpendicular to the selected segment
802 possibleMoveDirections = new ArrayList<>();
803 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
804 initialN1en.getY() - initialN2en.getY(),
805 initialN2en.getX() - initialN1en.getX()
806 ), initialN1en, initialN2en, true));
807
808
809 //add directions parallel to neighbor segments
810 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
811 if (prevNode != null) {
812 EastNorth en = prevNode.getEastNorth();
813 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
814 initialN1en.getX() - en.getX(),
815 initialN1en.getY() - en.getY()
816 ), initialN1en, en, false));
817 }
818
819 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
820 if (nextNode != null) {
821 EastNorth en = nextNode.getEastNorth();
822 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
823 initialN2en.getX() - en.getX(),
824 initialN2en.getY() - en.getY()
825 ), initialN2en, en, false));
826 }
827 }
828
829 /**
830 * Gathers possible move directions - along all adjacent segments.
831 */
832 private void calculatePossibleDirectionsByNode() {
833 // remember initial positions for segment nodes.
834 initialN1en = selectedNode.getEastNorth();
835 initialN2en = initialN1en;
836 possibleMoveDirections = new ArrayList<>();
837 for (OsmPrimitive p: selectedNode.getReferrers()) {
838 if (p instanceof Way && p.isUsable()) {
839 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
840 EastNorth en = neighbor.getEastNorth();
841 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
842 initialN1en.getX() - en.getX(),
843 initialN1en.getY() - en.getY()
844 ), initialN1en, en, false));
845 }
846 }
847 }
848 }
849
850 /**
851 * Checks dual alignment conditions:
852 * 1. selected segment has both neighboring segments,
853 * 2. selected segment is not parallel with neighboring segments.
854 * @return {@code true} if dual alignment conditions are satisfied
855 */
856 private boolean checkDualAlignConditions() {
857 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
858 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
859 if (prevNode == null || nextNode == null) {
860 return false;
861 }
862
863 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
864 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
865 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
866 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
867 return false;
868 }
869
870 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
871 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
872 if (prevSegmentParallel || nextSegmentParallel) {
873 return false;
874 }
875
876 return true;
877 }
878
879 /**
880 * Gathers possible move directions - perpendicular to the selected segment only.
881 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
882 */
883 private void calculatePossibleDirectionsForDualAlign() {
884 // remember initial positions for segment nodes.
885 initialN1en = selectedSegment.getFirstNode().getEastNorth();
886 initialN2en = selectedSegment.getSecondNode().getEastNorth();
887
888 // add direction perpendicular to the selected segment
889 possibleMoveDirections = new ArrayList<>();
890 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
891 initialN1en.getY() - initialN2en.getY(),
892 initialN2en.getX() - initialN1en.getX()
893 ), initialN1en, initialN2en, true));
894
895 // set neighboring segments
896 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
897 if (prevNode != null) {
898 EastNorth prevNodeEn = prevNode.getEastNorth();
899 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
900 initialN1en.getX() - prevNodeEn.getX(),
901 initialN1en.getY() - prevNodeEn.getY()
902 ), initialN1en, prevNodeEn, false);
903 }
904
905 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
906 if (nextNode != null) {
907 EastNorth nextNodeEn = nextNode.getEastNorth();
908 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
909 initialN2en.getX() - nextNodeEn.getX(),
910 initialN2en.getY() - nextNodeEn.getY()
911 ), initialN2en, nextNodeEn, false);
912 }
913 }
914
915 /**
916 * Calculate newN1en, newN2en best suitable for given mouse coordinates
917 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
918 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
919 * @param mouseEn mouse coordinates
920 * @return best movement vector
921 */
922 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
923 EastNorth bestMovement = calculateBestMovement(mouseEn);
924 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
925
926 // find out the movement distance, in metres
927 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
928 Main.getProjection().eastNorth2latlon(n1movedEn));
929 Main.map.statusLine.setDist(distance);
930 updateStatusLine();
931
932 if (dualAlignActive) {
933 // new positions of selected segment's nodes, without applying dual alignment
934 n1movedEn = initialN1en.add(bestMovement);
935 n2movedEn = initialN2en.add(bestMovement);
936
937 // calculate intersections of parallel shifted segment and the adjacent lines
938 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
939 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
940 if (newN1en == null || newN2en == null) return bestMovement;
941 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
942 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
943 dualAlignSegment2.p1, dualAlignSegment2.p2);
944 newN1en = collapsedSegmentPosition;
945 newN2en = collapsedSegmentPosition;
946 dualAlignSegmentCollapsed = true;
947 } else {
948 dualAlignSegmentCollapsed = false;
949 }
950 } else {
951 newN1en = n1movedEn;
952 newN2en = initialN2en.add(bestMovement);
953 }
954 return bestMovement;
955 }
956
957 /**
958 * Gets a node index from selected way before given index.
959 * @param index index of current node
960 * @return index of previous node or <code>-1</code> if there are no nodes there.
961 */
962 private int getPreviousNodeIndex(int index) {
963 if (index > 0)
964 return index - 1;
965 else if (selectedSegment.way.isClosed())
966 return selectedSegment.way.getNodesCount() - 2;
967 else
968 return -1;
969 }
970
971 /**
972 * Gets a node from selected way before given index.
973 * @param index index of current node
974 * @return previous node or <code>null</code> if there are no nodes there.
975 */
976 private Node getPreviousNode(int index) {
977 int indexPrev = getPreviousNodeIndex(index);
978 if (indexPrev >= 0)
979 return selectedSegment.way.getNode(indexPrev);
980 else
981 return null;
982 }
983
984
985 /**
986 * Gets a node index from selected way after given index.
987 * @param index index of current node
988 * @return index of next node or <code>-1</code> if there are no nodes there.
989 */
990 private int getNextNodeIndex(int index) {
991 int count = selectedSegment.way.getNodesCount();
992 if (index < count - 1)
993 return index + 1;
994 else if (selectedSegment.way.isClosed())
995 return 1;
996 else
997 return -1;
998 }
999
1000 /**
1001 * Gets a node from selected way after given index.
1002 * @param index index of current node
1003 * @return next node or <code>null</code> if there are no nodes there.
1004 */
1005 private Node getNextNode(int index) {
1006 int indexNext = getNextNodeIndex(index);
1007 if (indexNext >= 0)
1008 return selectedSegment.way.getNode(indexNext);
1009 else
1010 return null;
1011 }
1012
1013 // -------------------------------------------------------------------------
1014 // paint methods
1015 // -------------------------------------------------------------------------
1016
1017 @Override
1018 public void paint(Graphics2D g, MapView mv, Bounds box) {
1019 Graphics2D g2 = g;
1020 if (mode == Mode.select) {
1021 // Nothing to do
1022 } else {
1023 if (newN1en != null) {
1024
1025 EastNorth p1 = initialN1en;
1026 EastNorth p2 = initialN2en;
1027 EastNorth p3 = newN1en;
1028 EastNorth p4 = newN2en;
1029
1030 Point2D normalUnitVector = activeMoveDirection != null ? getNormalUniVector() : null;
1031
1032 if (mode == Mode.extrude || mode == Mode.create_new) {
1033 g2.setColor(mainColor);
1034 g2.setStroke(mainStroke);
1035 // Draw rectangle around new area.
1036 MapViewPath b = new MapViewPath(mv);
1037 b.moveTo(p1);
1038 b.lineTo(p3);
1039 b.lineTo(p4);
1040 b.lineTo(p2);
1041 b.lineTo(p1);
1042 g2.draw(b);
1043
1044 if (dualAlignActive) {
1045 // Draw reference ways
1046 drawReferenceSegment(g2, mv, dualAlignSegment1);
1047 drawReferenceSegment(g2, mv, dualAlignSegment2);
1048 } else if (activeMoveDirection != null && normalUnitVector != null) {
1049 // Draw reference way
1050 drawReferenceSegment(g2, mv, activeMoveDirection);
1051
1052 // Draw right angle marker on first node position, only when moving at right angle
1053 if (activeMoveDirection.perpendicular) {
1054 // mirror RightAngle marker, so it is inside the extrude
1055 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1056 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1057 double headingDiff = headingRefWS - headingMoveDir;
1058 if (headingDiff < 0)
1059 headingDiff += 2 * Math.PI;
1060 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1061 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1062 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1063 }
1064 }
1065 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1066 g2.setColor(mainColor);
1067 if (p1.distance(p2) < 3) {
1068 g2.setStroke(mainStroke);
1069 g2.draw(new MapViewPath(mv).shapeAround(p1, SymbolShape.CIRCLE, symbolSize));
1070 } else {
1071 g2.setStroke(oldLineStroke);
1072 g2.draw(new MapViewPath(mv).moveTo(p1).lineTo(p2));
1073 }
1074
1075 if (dualAlignActive) {
1076 // Draw reference ways
1077 drawReferenceSegment(g2, mv, dualAlignSegment1);
1078 drawReferenceSegment(g2, mv, dualAlignSegment2);
1079 } else if (activeMoveDirection != null) {
1080
1081 g2.setColor(helperColor);
1082 g2.setStroke(helperStrokeDash);
1083 // Draw a guideline along the normal.
1084 Line2D normline;
1085 Point2D centerpoint = mv.getPoint2D(p1.interpolate(p2, .5));
1086 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1087 g2.draw(normline);
1088 // Draw right angle marker on initial position, only when moving at right angle
1089 if (activeMoveDirection.perpendicular) {
1090 // EastNorth units per pixel
1091 g2.setStroke(helperStrokeRA);
1092 g2.setColor(mainColor);
1093 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1094 }
1095 }
1096 }
1097 }
1098 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1099 }
1100 }
1101
1102 private Point2D getNormalUniVector() {
1103 double fac = 1.0 / activeMoveDirection.en.length();
1104 // mult by factor to get unit vector.
1105 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1106
1107 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1108 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1109 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1110 // If not, use a sign-flipped version of the normalUnitVector.
1111 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1112 }
1113
1114 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1115 //This is normally done by MapView.getPoint, but it does not work on vectors.
1116 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1117 return normalUnitVector;
1118 }
1119
1120 /**
1121 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1122 * @param from1 vector1 start
1123 * @param to1 vector1 end
1124 * @param from2 vector2 start
1125 * @param to2 vector2 end
1126 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1127 */
1128 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1129 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1130 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1131 }
1132
1133 /**
1134 * Draws right angle symbol at specified position.
1135 * @param g2 the Graphics2D object used to draw on
1136 * @param center center point of angle
1137 * @param normal vector of normal
1138 * @param mirror {@code true} if symbol should be mirrored by the normal
1139 */
1140 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1141 // EastNorth units per pixel
1142 double factor = 1.0/g2.getTransform().getScaleX();
1143 double raoffsetx = symbolSize*factor*normal.getX();
1144 double raoffsety = symbolSize*factor*normal.getY();
1145
1146 double cx = center.getX(), cy = center.getY();
1147 double k = mirror ? -1 : 1;
1148 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1149 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1150 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1151
1152 GeneralPath ra = new GeneralPath();
1153 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1154 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1155 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1156 g2.setStroke(helperStrokeRA);
1157 g2.draw(ra);
1158 }
1159
1160 /**
1161 * Draws given reference segment.
1162 * @param g2 the Graphics2D object used to draw on
1163 * @param mv map view
1164 * @param seg the reference segment
1165 */
1166 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1167 g2.setColor(helperColor);
1168 g2.setStroke(helperStrokeDash);
1169 g2.draw(new MapViewPath(mv).moveTo(seg.p1).lineTo(seg.p2));
1170 }
1171
1172 /**
1173 * Creates a new Line that extends off the edge of the viewport in one direction
1174 * @param start The start point of the line
1175 * @param unitvector A unit vector denoting the direction of the line
1176 * @param g the Graphics2D object it will be used on
1177 * @return created line
1178 */
1179 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1180 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1181 try {
1182 AffineTransform invtrans = g.getTransform().createInverse();
1183 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1184 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1185
1186 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1187 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1188 // This can be used as a safe length of line to generate which will always go off-viewport.
1189 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1190 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1191
1192 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1193 + (unitvector.getY() * linelength)));
1194 } catch (NoninvertibleTransformException e) {
1195 Main.debug(e);
1196 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1197 + (unitvector.getY() * 10)));
1198 }
1199 }
1200}
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