source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 9409

Last change on this file since 9409 was 9409, checked in by simon04, 8 years ago

fix #12335 - Disable "Angle snapping", "Dual alignment" when no edit layer is present, fixes NPE
  • Property svn:eol-style set to native
File size: 50.5 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.actions.mapmode;
3
4import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
5import static org.openstreetmap.josm.tools.I18n.marktr;
6import static org.openstreetmap.josm.tools.I18n.tr;
7
8import java.awt.BasicStroke;
9import java.awt.Color;
10import java.awt.Cursor;
11import java.awt.Graphics2D;
12import java.awt.Point;
13import java.awt.Rectangle;
14import java.awt.Stroke;
15import java.awt.event.ActionEvent;
16import java.awt.event.KeyEvent;
17import java.awt.event.MouseEvent;
18import java.awt.geom.AffineTransform;
19import java.awt.geom.GeneralPath;
20import java.awt.geom.Line2D;
21import java.awt.geom.NoninvertibleTransformException;
22import java.awt.geom.Point2D;
23import java.util.ArrayList;
24import java.util.Collection;
25import java.util.LinkedList;
26import java.util.List;
27
28import javax.swing.JCheckBoxMenuItem;
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.gui.MainMenu;
47import org.openstreetmap.josm.gui.MapFrame;
48import org.openstreetmap.josm.gui.MapView;
49import org.openstreetmap.josm.gui.layer.Layer;
50import org.openstreetmap.josm.gui.layer.MapViewPaintable;
51import org.openstreetmap.josm.gui.layer.OsmDataLayer;
52import org.openstreetmap.josm.gui.util.GuiHelper;
53import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
54import org.openstreetmap.josm.gui.util.ModifierListener;
55import org.openstreetmap.josm.tools.Geometry;
56import org.openstreetmap.josm.tools.ImageProvider;
57import org.openstreetmap.josm.tools.Shortcut;
58
59/**
60 * Makes a rectangle from a line, or modifies a rectangle.
61 */
62public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierListener {
63
64 enum Mode { extrude, translate, select, create_new, translate_node }
65
66 private Mode mode = Mode.select;
67
68 /**
69 * If {@code true}, when extruding create new node(s) even if segments are parallel.
70 */
71 private boolean alwaysCreateNodes;
72 private boolean nodeDragWithoutCtrl;
73
74 private long mouseDownTime;
75 private transient WaySegment selectedSegment;
76 private transient Node selectedNode;
77 private Color mainColor;
78 private transient Stroke mainStroke;
79
80 /** settings value whether shared nodes should be ignored or not */
81 private boolean ignoreSharedNodes;
82
83 private boolean keepSegmentDirection;
84
85 /**
86 * drawing settings for helper lines
87 */
88 private Color helperColor;
89 private transient Stroke helperStrokeDash;
90 private transient Stroke helperStrokeRA;
91
92 private transient Stroke oldLineStroke;
93 private double symbolSize;
94 /**
95 * Possible directions to move to.
96 */
97 private transient List<ReferenceSegment> possibleMoveDirections;
98
99
100 /**
101 * Collection of nodes that is moved
102 */
103 private List<Node> movingNodeList;
104
105 /**
106 * The direction that is currently active.
107 */
108 private transient ReferenceSegment activeMoveDirection;
109
110 /**
111 * The position of the mouse cursor when the drag action was initiated.
112 */
113 private Point initialMousePos;
114 /**
115 * The time which needs to pass between click and release before something
116 * counts as a move, in milliseconds
117 */
118 private int initialMoveDelay = 200;
119 /**
120 * The minimal shift of mouse (in pixels) befire something counts as move
121 */
122 private int initialMoveThreshold = 1;
123
124 /**
125 * The initial EastNorths of node1 and node2
126 */
127 private EastNorth initialN1en;
128 private EastNorth initialN2en;
129 /**
130 * The new EastNorths of node1 and node2
131 */
132 private EastNorth newN1en;
133 private EastNorth newN2en;
134
135 /**
136 * the command that performed last move.
137 */
138 private transient MoveCommand moveCommand;
139 /**
140 * The command used for dual alignment movement.
141 * Needs to be separate, due to two nodes moving in different directions.
142 */
143 private transient MoveCommand moveCommand2;
144
145 /** The cursor for the 'create_new' mode. */
146 private final Cursor cursorCreateNew;
147
148 /** The cursor for the 'translate' mode. */
149 private final Cursor cursorTranslate;
150
151 /** The cursor for the 'alwaysCreateNodes' submode. */
152 private final Cursor cursorCreateNodes;
153
154 private static class ReferenceSegment {
155 public final EastNorth en;
156 public final EastNorth p1;
157 public final EastNorth p2;
158 public final boolean perpendicular;
159
160 ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
161 this.en = en;
162 this.p1 = p1;
163 this.p2 = p2;
164 this.perpendicular = perpendicular;
165 }
166
167 @Override
168 public String toString() {
169 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + ']';
170 }
171 }
172
173 // Dual alignment mode stuff
174 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
175 private boolean dualAlignEnabled;
176 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met.
177 * Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
178 private boolean dualAlignActive;
179 /** Dual alignment reference segments */
180 private transient ReferenceSegment dualAlignSegment1, dualAlignSegment2;
181 /** {@code true}, if new segment was collapsed */
182 private boolean dualAlignSegmentCollapsed;
183 // Dual alignment UI stuff
184 private final DualAlignChangeAction dualAlignChangeAction;
185 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
186 private final transient Shortcut dualAlignShortcut;
187 private boolean useRepeatedShortcut;
188 private boolean ignoreNextKeyRelease;
189
190 private class DualAlignChangeAction extends JosmAction {
191 DualAlignChangeAction() {
192 super(tr("Dual alignment"), /* ICON() */ "mapmode/extrude/dualalign",
193 tr("Switch dual alignment mode while extruding"), null, false);
194 putValue("help", ht("/Action/Extrude#DualAlign"));
195 }
196
197 @Override
198 public void actionPerformed(ActionEvent e) {
199 toggleDualAlign();
200 }
201
202 @Override
203 protected void updateEnabledState() {
204 setEnabled(Main.main != null && Main.main.hasEditLayer());
205 }
206 }
207
208 /**
209 * Creates a new ExtrudeAction
210 * @param mapFrame The MapFrame this action belongs to.
211 */
212 public ExtrudeAction(MapFrame mapFrame) {
213 super(tr("Extrude"), /* ICON(mapmode/) */ "extrude/extrude", tr("Create areas"),
214 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
215 mapFrame,
216 ImageProvider.getCursor("normal", "rectangle"));
217 putValue("help", ht("/Action/Extrude"));
218 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
219 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
220 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
221
222 dualAlignEnabled = false;
223 dualAlignChangeAction = new DualAlignChangeAction();
224 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
225 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
226 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
227 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
228 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
229 readPreferences(); // to show prefernces in table before entering the mode
230 }
231
232 @Override
233 public void destroy() {
234 super.destroy();
235 dualAlignChangeAction.destroy();
236 }
237
238 private JCheckBoxMenuItem addDualAlignMenuItem() {
239 int n = Main.main.menu.editMenu.getItemCount();
240 for (int i = n-1; i > 0; i--) {
241 JMenuItem item = Main.main.menu.editMenu.getItem(i);
242 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
243 Main.main.menu.editMenu.remove(i);
244 }
245 }
246 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
247 }
248
249 // -------------------------------------------------------------------------
250 // Mode methods
251 // -------------------------------------------------------------------------
252
253 @Override
254 public String getModeHelpText() {
255 StringBuilder rv;
256 if (mode == Mode.select) {
257 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
258 "Alt-drag to create a new rectangle, double click to add a new node."));
259 if (dualAlignEnabled) {
260 rv.append(' ').append(tr("Dual alignment active."));
261 if (dualAlignSegmentCollapsed)
262 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
263 }
264 } else {
265 if (mode == Mode.translate)
266 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
267 else if (mode == Mode.translate_node)
268 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
269 else if (mode == Mode.extrude)
270 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
271 else if (mode == Mode.create_new)
272 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
273 else {
274 Main.warn("Extrude: unknown mode " + mode);
275 rv = new StringBuilder();
276 }
277 if (dualAlignActive) {
278 rv.append(' ').append(tr("Dual alignment active."));
279 if (dualAlignSegmentCollapsed) {
280 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
281 }
282 }
283 }
284 return rv.toString();
285 }
286
287 @Override
288 public boolean layerIsSupported(Layer l) {
289 return l instanceof OsmDataLayer;
290 }
291
292 @Override
293 public void enterMode() {
294 super.enterMode();
295 Main.map.mapView.addMouseListener(this);
296 Main.map.mapView.addMouseMotionListener(this);
297 readPreferences();
298 ignoreNextKeyRelease = true;
299 Main.map.keyDetector.addKeyListener(this);
300 Main.map.keyDetector.addModifierListener(this);
301 }
302
303 private void readPreferences() {
304 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
305 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
306 mainColor = Main.pref.getColor(marktr("Extrude: main line"), null);
307 if (mainColor == null) mainColor = PaintColors.SELECTED.get();
308 helperColor = Main.pref.getColor(marktr("Extrude: helper line"), Color.ORANGE);
309 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
310 helperStrokeRA = new BasicStroke(1);
311 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
312 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
313 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
314 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
315
316 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
317 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
318 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
319 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
320 }
321
322 @Override
323 public void exitMode() {
324 Main.map.mapView.removeMouseListener(this);
325 Main.map.mapView.removeMouseMotionListener(this);
326 Main.map.mapView.removeTemporaryLayer(this);
327 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
328 Main.map.keyDetector.removeKeyListener(this);
329 Main.map.keyDetector.removeModifierListener(this);
330 super.exitMode();
331 }
332
333 // -------------------------------------------------------------------------
334 // Event handlers
335 // -------------------------------------------------------------------------
336
337 /**
338 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
339 */
340 @Override
341 public void modifiersChanged(int modifiers) {
342 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
343 return;
344 updateKeyModifiers(modifiers);
345 if (mode == Mode.select) {
346 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
347 }
348 }
349
350 @Override
351 public void doKeyPressed(KeyEvent e) {
352 }
353
354 @Override
355 public void doKeyReleased(KeyEvent e) {
356 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
357 return;
358 if (ignoreNextKeyRelease) {
359 ignoreNextKeyRelease = false;
360 } else {
361 toggleDualAlign();
362 }
363 }
364
365 /**
366 * Toggles dual alignment mode.
367 */
368 private void toggleDualAlign() {
369 dualAlignEnabled = !dualAlignEnabled;
370 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
371 updateStatusLine();
372 }
373
374 /**
375 * If the left mouse button is pressed over a segment or a node, switches
376 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
377 * {@link #dualAlignEnabled}.
378 * @param e current mouse event
379 */
380 @Override
381 public void mousePressed(MouseEvent e) {
382 if (!Main.map.mapView.isActiveLayerVisible())
383 return;
384 if (!(Boolean) this.getValue("active"))
385 return;
386 if (e.getButton() != MouseEvent.BUTTON1)
387 return;
388
389 requestFocusInMapView();
390 updateKeyModifiers(e);
391
392 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive.isSelectablePredicate);
393 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate);
394
395 // If nothing gets caught, stay in select mode
396 if (selectedSegment == null && selectedNode == null) return;
397
398 if (selectedNode != null) {
399 if (ctrl || nodeDragWithoutCtrl) {
400 movingNodeList = new ArrayList<>();
401 movingNodeList.add(selectedNode);
402 calculatePossibleDirectionsByNode();
403 if (possibleMoveDirections.isEmpty()) {
404 // if no directions fould, do not enter dragging mode
405 return;
406 }
407 mode = Mode.translate_node;
408 dualAlignActive = false;
409 }
410 } else {
411 // Otherwise switch to another mode
412 if (dualAlignEnabled && checkDualAlignConditions()) {
413 dualAlignActive = true;
414 calculatePossibleDirectionsForDualAlign();
415 dualAlignSegmentCollapsed = false;
416 } else {
417 dualAlignActive = false;
418 calculatePossibleDirectionsBySegment();
419 }
420 if (ctrl) {
421 mode = Mode.translate;
422 movingNodeList = new ArrayList<>();
423 movingNodeList.add(selectedSegment.getFirstNode());
424 movingNodeList.add(selectedSegment.getSecondNode());
425 } else if (alt) {
426 mode = Mode.create_new;
427 // create a new segment and then select and extrude the new segment
428 getCurrentDataSet().setSelected(selectedSegment.way);
429 alwaysCreateNodes = true;
430 } else {
431 mode = Mode.extrude;
432 getCurrentDataSet().setSelected(selectedSegment.way);
433 alwaysCreateNodes = shift;
434 }
435 }
436
437 // Signifies that nothing has happened yet
438 newN1en = null;
439 newN2en = null;
440 moveCommand = null;
441 moveCommand2 = null;
442
443 Main.map.mapView.addTemporaryLayer(this);
444
445 updateStatusLine();
446 Main.map.mapView.repaint();
447
448 // Make note of time pressed
449 mouseDownTime = System.currentTimeMillis();
450
451 // Make note of mouse position
452 initialMousePos = e.getPoint();
453 }
454
455 /**
456 * Performs action depending on what {@link #mode} we're in.
457 * @param e current mouse event
458 */
459 @Override
460 public void mouseDragged(MouseEvent e) {
461 if (!Main.map.mapView.isActiveLayerVisible())
462 return;
463
464 // do not count anything as a drag if it lasts less than 100 milliseconds.
465 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
466 return;
467
468 if (mode == Mode.select) {
469 // Just sit tight and wait for mouse to be released.
470 } else {
471 //move, create new and extrude mode - move the selected segment
472
473 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
474 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
475
476 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
477
478 if (dualAlignActive) {
479 if (mode == Mode.extrude || mode == Mode.create_new) {
480 // nothing here
481 } else if (mode == Mode.translate) {
482 EastNorth movement1 = newN1en.subtract(initialN1en);
483 EastNorth movement2 = newN2en.subtract(initialN2en);
484 // move nodes to new position
485 if (moveCommand == null || moveCommand2 == null) {
486 // make a new move commands
487 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
488 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
489 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
490 Main.main.undoRedo.add(c);
491 } else {
492 // reuse existing move commands
493 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
494 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
495 }
496 }
497 } else {
498 if (mode == Mode.extrude || mode == Mode.create_new) {
499 //nothing here
500 } else if (mode == Mode.translate_node || mode == Mode.translate) {
501 //move nodes to new position
502 if (moveCommand == null) {
503 //make a new move command
504 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
505 Main.main.undoRedo.add(moveCommand);
506 } else {
507 //reuse existing move command
508 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
509 }
510 }
511 }
512
513 Main.map.mapView.repaint();
514 }
515 }
516
517 /**
518 * Does anything that needs to be done, then switches back to select mode.
519 * @param e current mouse event
520 */
521 @Override
522 public void mouseReleased(MouseEvent e) {
523
524 if (!Main.map.mapView.isActiveLayerVisible())
525 return;
526
527 if (mode == Mode.select) {
528 // Nothing to be done
529 } else {
530 if (mode == Mode.create_new) {
531 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
532 createNewRectangle();
533 }
534 } else if (mode == Mode.extrude) {
535 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
536 // double click adds a new node
537 addNewNode(e);
538 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
539 // main extrusion commands
540 performExtrusion();
541 }
542 } else if (mode == Mode.translate || mode == Mode.translate_node) {
543 //Commit translate
544 //the move command is already committed in mouseDragged
545 joinNodesIfCollapsed(movingNodeList);
546 }
547
548 updateKeyModifiers(e);
549 // Switch back into select mode
550 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
551 Main.map.mapView.removeTemporaryLayer(this);
552 selectedSegment = null;
553 moveCommand = null;
554 mode = Mode.select;
555 dualAlignSegmentCollapsed = false;
556 updateStatusLine();
557 Main.map.mapView.repaint();
558 }
559 }
560
561 // -------------------------------------------------------------------------
562 // Custom methods
563 // -------------------------------------------------------------------------
564
565 /**
566 * Inserts node into nearby segment.
567 * @param e current mouse point
568 */
569 private static void addNewNode(MouseEvent e) {
570 // Should maybe do the same as in DrawAction and fetch all nearby segments?
571 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate);
572 if (ws != null) {
573 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
574 EastNorth A = ws.getFirstNode().getEastNorth();
575 EastNorth B = ws.getSecondNode().getEastNorth();
576 n.setEastNorth(Geometry.closestPointToSegment(A, B, n.getEastNorth()));
577 Way wnew = new Way(ws.way);
578 wnew.addNode(ws.lowerIndex+1, n);
579 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
580 new AddCommand(n), new ChangeCommand(ws.way, wnew));
581 Main.main.undoRedo.add(cmds);
582 }
583 }
584
585 /**
586 * Creates a new way that shares segment with selected way.
587 */
588 private void createNewRectangle() {
589 if (selectedSegment == null) return;
590 // crete a new rectangle
591 Collection<Command> cmds = new LinkedList<>();
592 Node third = new Node(newN2en);
593 Node fourth = new Node(newN1en);
594 Way wnew = new Way();
595 wnew.addNode(selectedSegment.getFirstNode());
596 wnew.addNode(selectedSegment.getSecondNode());
597 wnew.addNode(third);
598 if (!dualAlignSegmentCollapsed) {
599 // rectangle can degrade to triangle for dual alignment after collapsing
600 wnew.addNode(fourth);
601 }
602 // ... and close the way
603 wnew.addNode(selectedSegment.getFirstNode());
604 // undo support
605 cmds.add(new AddCommand(third));
606 if (!dualAlignSegmentCollapsed) {
607 cmds.add(new AddCommand(fourth));
608 }
609 cmds.add(new AddCommand(wnew));
610 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
611 Main.main.undoRedo.add(c);
612 getCurrentDataSet().setSelected(wnew);
613 }
614
615 /**
616 * Does actual extrusion of {@link #selectedSegment}.
617 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
618 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
619 */
620 private void performExtrusion() {
621 // create extrusion
622 Collection<Command> cmds = new LinkedList<>();
623 Way wnew = new Way(selectedSegment.way);
624 boolean wayWasModified = false;
625 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
626 int insertionPoint = selectedSegment.lowerIndex + 1;
627
628 //find if the new points overlap existing segments (in case of 90 degree angles)
629 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
630 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
631 // segmentAngleZero marks subset of nodeOverlapsSegment.
632 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
633 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
634 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
635 List<Node> changedNodes = new ArrayList<>();
636 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
637 //move existing node
638 Node n1Old = selectedSegment.getFirstNode();
639 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
640 changedNodes.add(n1Old);
641 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
642 // replace shared node with new one
643 Node n1Old = selectedSegment.getFirstNode();
644 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
645 wnew.addNode(insertionPoint, n1New);
646 wnew.removeNode(n1Old);
647 wayWasModified = true;
648 cmds.add(new AddCommand(n1New));
649 changedNodes.add(n1New);
650 } else {
651 //introduce new node
652 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
653 wnew.addNode(insertionPoint, n1New);
654 wayWasModified = true;
655 insertionPoint++;
656 cmds.add(new AddCommand(n1New));
657 changedNodes.add(n1New);
658 }
659
660 //find if the new points overlap existing segments (in case of 90 degree angles)
661 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
662 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
663 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
664 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
665
666 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
667 //move existing node
668 Node n2Old = selectedSegment.getSecondNode();
669 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
670 changedNodes.add(n2Old);
671 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
672 // replace shared node with new one
673 Node n2Old = selectedSegment.getSecondNode();
674 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
675 wnew.addNode(insertionPoint, n2New);
676 wnew.removeNode(n2Old);
677 wayWasModified = true;
678 cmds.add(new AddCommand(n2New));
679 changedNodes.add(n2New);
680 } else {
681 //introduce new node
682 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
683 wnew.addNode(insertionPoint, n2New);
684 wayWasModified = true;
685 insertionPoint++;
686 cmds.add(new AddCommand(n2New));
687 changedNodes.add(n2New);
688 }
689
690 //the way was a single segment, close the way
691 if (wayWasSingleSegment) {
692 wnew.addNode(selectedSegment.getFirstNode());
693 wayWasModified = true;
694 }
695 if (wayWasModified) {
696 // we only need to change the way if its node list was really modified
697 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
698 }
699 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
700 Main.main.undoRedo.add(c);
701 joinNodesIfCollapsed(changedNodes);
702 }
703
704 private void joinNodesIfCollapsed(List<Node> changedNodes) {
705 if (!dualAlignActive || newN1en == null || newN2en == null) return;
706 if (newN1en.distance(newN2en) > 1e-6) return;
707 // If the dual alignment moved two nodes to the same point, merge them
708 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
709 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
710 Command mergeCmd = MergeNodesAction.mergeNodes(Main.main.getEditLayer(), changedNodes, targetNode, locNode);
711 if (mergeCmd != null) {
712 Main.main.undoRedo.add(mergeCmd);
713 } else {
714 // undo extruding command itself
715 Main.main.undoRedo.undo();
716 }
717 }
718
719 /**
720 * This method tests if {@code node} has other ways apart from the given one.
721 * @param node node to test
722 * @param myWay way known to contain this node
723 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
724 */
725 private static boolean hasNodeOtherWays(Node node, Way myWay) {
726 for (OsmPrimitive p : node.getReferrers()) {
727 if (p instanceof Way && p.isUsable() && p != myWay)
728 return true;
729 }
730 return false;
731 }
732
733 /**
734 * Determines best movement from {@link #initialMousePos} to current mouse position,
735 * choosing one of the directions from {@link #possibleMoveDirections}.
736 * @param mouseEn current mouse position
737 * @return movement vector
738 */
739 private EastNorth calculateBestMovement(EastNorth mouseEn) {
740
741 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
742 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
743
744 double bestDistance = Double.POSITIVE_INFINITY;
745 EastNorth bestMovement = null;
746 activeMoveDirection = null;
747
748 //find the best movement direction and vector
749 for (ReferenceSegment direction : possibleMoveDirections) {
750 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
751 if (movement == null) {
752 //if direction parallel to segment.
753 continue;
754 }
755
756 double distanceFromMouseMovement = movement.distance(mouseMovement);
757 if (bestDistance > distanceFromMouseMovement) {
758 bestDistance = distanceFromMouseMovement;
759 activeMoveDirection = direction;
760 bestMovement = movement;
761 }
762 }
763 return bestMovement;
764
765
766 }
767
768 /***
769 * This method calculates offset amount by which to move the given segment
770 * perpendicularly for it to be in line with mouse position.
771 * @param segmentP1 segment's first point
772 * @param segmentP2 segment's second point
773 * @param moveDirection direction of movement
774 * @param targetPos mouse position
775 * @return offset amount of P1 and P2.
776 */
777 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
778 EastNorth targetPos) {
779 EastNorth intersectionPoint;
780 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
781 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
782 } else {
783 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
784 }
785
786 if (intersectionPoint == null)
787 return null;
788 else
789 //return distance form base to target position
790 return targetPos.subtract(intersectionPoint);
791 }
792
793 /**
794 * Gathers possible move directions - perpendicular to the selected segment
795 * and parallel to neighboring segments.
796 */
797 private void calculatePossibleDirectionsBySegment() {
798 // remember initial positions for segment nodes.
799 initialN1en = selectedSegment.getFirstNode().getEastNorth();
800 initialN2en = selectedSegment.getSecondNode().getEastNorth();
801
802 //add direction perpendicular to the selected segment
803 possibleMoveDirections = new ArrayList<>();
804 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
805 initialN1en.getY() - initialN2en.getY(),
806 initialN2en.getX() - initialN1en.getX()
807 ), initialN1en, initialN2en, true));
808
809
810 //add directions parallel to neighbor segments
811 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
812 if (prevNode != null) {
813 EastNorth en = prevNode.getEastNorth();
814 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
815 initialN1en.getX() - en.getX(),
816 initialN1en.getY() - en.getY()
817 ), initialN1en, en, false));
818 }
819
820 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
821 if (nextNode != null) {
822 EastNorth en = nextNode.getEastNorth();
823 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
824 initialN2en.getX() - en.getX(),
825 initialN2en.getY() - en.getY()
826 ), initialN2en, en, false));
827 }
828 }
829
830 /**
831 * Gathers possible move directions - along all adjacent segments.
832 */
833 private void calculatePossibleDirectionsByNode() {
834 // remember initial positions for segment nodes.
835 initialN1en = selectedNode.getEastNorth();
836 initialN2en = initialN1en;
837 possibleMoveDirections = new ArrayList<>();
838 for (OsmPrimitive p: selectedNode.getReferrers()) {
839 if (p instanceof Way && p.isUsable()) {
840 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
841 EastNorth en = neighbor.getEastNorth();
842 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
843 initialN1en.getX() - en.getX(),
844 initialN1en.getY() - en.getY()
845 ), initialN1en, en, false));
846 }
847 }
848 }
849 }
850
851 /**
852 * Checks dual alignment conditions:
853 * 1. selected segment has both neighboring segments,
854 * 2. selected segment is not parallel with neighboring segments.
855 * @return {@code true} if dual alignment conditions are satisfied
856 */
857 private boolean checkDualAlignConditions() {
858 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
859 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
860 if (prevNode == null || nextNode == null) {
861 return false;
862 }
863
864 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
865 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
866 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
867 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
868 return false;
869 }
870
871 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
872 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
873 if (prevSegmentParallel || nextSegmentParallel) {
874 return false;
875 }
876
877 return true;
878 }
879
880 /**
881 * Gathers possible move directions - perpendicular to the selected segment only.
882 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
883 */
884 private void calculatePossibleDirectionsForDualAlign() {
885 // remember initial positions for segment nodes.
886 initialN1en = selectedSegment.getFirstNode().getEastNorth();
887 initialN2en = selectedSegment.getSecondNode().getEastNorth();
888
889 // add direction perpendicular to the selected segment
890 possibleMoveDirections = new ArrayList<>();
891 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
892 initialN1en.getY() - initialN2en.getY(),
893 initialN2en.getX() - initialN1en.getX()
894 ), initialN1en, initialN2en, true));
895
896 // set neighboring segments
897 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
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 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
905 EastNorth nextNodeEn = nextNode.getEastNorth();
906 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
907 initialN2en.getX() - nextNodeEn.getX(),
908 initialN2en.getY() - nextNodeEn.getY()
909 ), initialN2en, nextNodeEn, false);
910 }
911
912 /**
913 * Calculate newN1en, newN2en best suitable for given mouse coordinates
914 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
915 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
916 * @param mouseEn mouse coordinates
917 * @return best movement vector
918 */
919 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
920 EastNorth bestMovement = calculateBestMovement(mouseEn);
921 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
922
923 // find out the movement distance, in metres
924 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
925 Main.getProjection().eastNorth2latlon(n1movedEn));
926 Main.map.statusLine.setDist(distance);
927 updateStatusLine();
928
929 if (dualAlignActive) {
930 // new positions of selected segment's nodes, without applying dual alignment
931 n1movedEn = initialN1en.add(bestMovement);
932 n2movedEn = initialN2en.add(bestMovement);
933
934 // calculate intersections of parallel shifted segment and the adjacent lines
935 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
936 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
937 if (newN1en == null || newN2en == null) return bestMovement;
938 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
939 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
940 dualAlignSegment2.p1, dualAlignSegment2.p2);
941 newN1en = collapsedSegmentPosition;
942 newN2en = collapsedSegmentPosition;
943 dualAlignSegmentCollapsed = true;
944 } else {
945 dualAlignSegmentCollapsed = false;
946 }
947 } else {
948 newN1en = n1movedEn;
949 newN2en = initialN2en.add(bestMovement);
950 }
951 return bestMovement;
952 }
953
954 /**
955 * Gets a node index from selected way before given index.
956 * @param index index of current node
957 * @return index of previous node or <code>-1</code> if there are no nodes there.
958 */
959 private int getPreviousNodeIndex(int index) {
960 if (index > 0)
961 return index - 1;
962 else if (selectedSegment.way.isClosed())
963 return selectedSegment.way.getNodesCount() - 2;
964 else
965 return -1;
966 }
967
968 /**
969 * Gets a node from selected way before given index.
970 * @param index index of current node
971 * @return previous node or <code>null</code> if there are no nodes there.
972 */
973 private Node getPreviousNode(int index) {
974 int indexPrev = getPreviousNodeIndex(index);
975 if (indexPrev >= 0)
976 return selectedSegment.way.getNode(indexPrev);
977 else
978 return null;
979 }
980
981
982 /**
983 * Gets a node index from selected way after given index.
984 * @param index index of current node
985 * @return index of next node or <code>-1</code> if there are no nodes there.
986 */
987 private int getNextNodeIndex(int index) {
988 int count = selectedSegment.way.getNodesCount();
989 if (index < count - 1)
990 return index + 1;
991 else if (selectedSegment.way.isClosed())
992 return 1;
993 else
994 return -1;
995 }
996
997 /**
998 * Gets a node from selected way after given index.
999 * @param index index of current node
1000 * @return next node or <code>null</code> if there are no nodes there.
1001 */
1002 private Node getNextNode(int index) {
1003 int indexNext = getNextNodeIndex(index);
1004 if (indexNext >= 0)
1005 return selectedSegment.way.getNode(indexNext);
1006 else
1007 return null;
1008 }
1009
1010 // -------------------------------------------------------------------------
1011 // paint methods
1012 // -------------------------------------------------------------------------
1013
1014 @Override
1015 public void paint(Graphics2D g, MapView mv, Bounds box) {
1016 Graphics2D g2 = g;
1017 if (mode == Mode.select) {
1018 // Nothing to do
1019 } else {
1020 if (newN1en != null) {
1021
1022 Point p1 = mv.getPoint(initialN1en);
1023 Point p2 = mv.getPoint(initialN2en);
1024 Point p3 = mv.getPoint(newN1en);
1025 Point p4 = mv.getPoint(newN2en);
1026
1027 Point2D normalUnitVector = getNormalUniVector();
1028
1029 if (mode == Mode.extrude || mode == Mode.create_new) {
1030 g2.setColor(mainColor);
1031 g2.setStroke(mainStroke);
1032 // Draw rectangle around new area.
1033 GeneralPath b = new GeneralPath();
1034 b.moveTo(p1.x, p1.y); b.lineTo(p3.x, p3.y);
1035 b.lineTo(p4.x, p4.y); b.lineTo(p2.x, p2.y);
1036 b.lineTo(p1.x, p1.y);
1037 g2.draw(b);
1038
1039 if (dualAlignActive) {
1040 // Draw reference ways
1041 drawReferenceSegment(g2, mv, dualAlignSegment1);
1042 drawReferenceSegment(g2, mv, dualAlignSegment2);
1043 } else if (activeMoveDirection != null) {
1044 // Draw reference way
1045 drawReferenceSegment(g2, mv, activeMoveDirection);
1046
1047 // Draw right angle marker on first node position, only when moving at right angle
1048 if (activeMoveDirection.perpendicular) {
1049 // mirror RightAngle marker, so it is inside the extrude
1050 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1051 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1052 double headingDiff = headingRefWS - headingMoveDir;
1053 if (headingDiff < 0) headingDiff += 2 * Math.PI;
1054 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1055 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1056 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1057 }
1058 }
1059 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1060 g2.setColor(mainColor);
1061 if (p1.distance(p2) < 3) {
1062 g2.setStroke(mainStroke);
1063 g2.drawOval((int) (p1.x-symbolSize/2), (int) (p1.y-symbolSize/2),
1064 (int) (symbolSize), (int) (symbolSize));
1065 } else {
1066 Line2D oldline = new Line2D.Double(p1, p2);
1067 g2.setStroke(oldLineStroke);
1068 g2.draw(oldline);
1069 }
1070
1071 if (dualAlignActive) {
1072 // Draw reference ways
1073 drawReferenceSegment(g2, mv, dualAlignSegment1);
1074 drawReferenceSegment(g2, mv, dualAlignSegment2);
1075 } else if (activeMoveDirection != null) {
1076
1077 g2.setColor(helperColor);
1078 g2.setStroke(helperStrokeDash);
1079 // Draw a guideline along the normal.
1080 Line2D normline;
1081 Point2D centerpoint = new Point2D.Double((p1.getX()+p2.getX())*0.5, (p1.getY()+p2.getY())*0.5);
1082 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1083 g2.draw(normline);
1084 // Draw right angle marker on initial position, only when moving at right angle
1085 if (activeMoveDirection.perpendicular) {
1086 // EastNorth units per pixel
1087 g2.setStroke(helperStrokeRA);
1088 g2.setColor(mainColor);
1089 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1090 }
1091 }
1092 }
1093 }
1094 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1095 }
1096 }
1097
1098 private Point2D getNormalUniVector() {
1099 double fac = 1.0 / activeMoveDirection.en.length();
1100 // mult by factor to get unit vector.
1101 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1102
1103 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1104 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1105 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1106 // If not, use a sign-flipped version of the normalUnitVector.
1107 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1108 }
1109
1110 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1111 //This is normally done by MapView.getPoint, but it does not work on vectors.
1112 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1113 return normalUnitVector;
1114 }
1115
1116 /**
1117 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1118 * @param from1 vector1 start
1119 * @param to1 vector1 end
1120 * @param from2 vector2 start
1121 * @param to2 vector2 end
1122 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1123 */
1124 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1125 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1126 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1127 }
1128
1129 /**
1130 * Draws right angle symbol at specified position.
1131 * @param g2 the Graphics2D object used to draw on
1132 * @param center center point of angle
1133 * @param normal vector of normal
1134 * @param mirror {@code true} if symbol should be mirrored by the normal
1135 */
1136 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1137 // EastNorth units per pixel
1138 double factor = 1.0/g2.getTransform().getScaleX();
1139 double raoffsetx = symbolSize*factor*normal.getX();
1140 double raoffsety = symbolSize*factor*normal.getY();
1141
1142 double cx = center.getX(), cy = center.getY();
1143 double k = mirror ? -1 : 1;
1144 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1145 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1146 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1147
1148 GeneralPath ra = new GeneralPath();
1149 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1150 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1151 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1152 g2.setStroke(helperStrokeRA);
1153 g2.draw(ra);
1154 }
1155
1156 /**
1157 * Draws given reference segment.
1158 * @param g2 the Graphics2D object used to draw on
1159 * @param mv map view
1160 * @param seg the reference segment
1161 */
1162 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1163 Point p1 = mv.getPoint(seg.p1);
1164 Point p2 = mv.getPoint(seg.p2);
1165 GeneralPath b = new GeneralPath();
1166 b.moveTo(p1.x, p1.y);
1167 b.lineTo(p2.x, p2.y);
1168 g2.setColor(helperColor);
1169 g2.setStroke(helperStrokeDash);
1170 g2.draw(b);
1171 }
1172
1173 /**
1174 * Creates a new Line that extends off the edge of the viewport in one direction
1175 * @param start The start point of the line
1176 * @param unitvector A unit vector denoting the direction of the line
1177 * @param g the Graphics2D object it will be used on
1178 * @return created line
1179 */
1180 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1181 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1182 try {
1183 AffineTransform invtrans = g.getTransform().createInverse();
1184 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1185 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1186
1187 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1188 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1189 // This can be used as a safe length of line to generate which will always go off-viewport.
1190 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1191 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1192
1193 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1194 + (unitvector.getY() * linelength)));
1195 } catch (NoninvertibleTransformException 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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