source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 12620

Last change on this file since 12620 was 12620, checked in by Don-vip, 7 years ago

see #15182 - deprecate all Main logging methods and introduce suitable replacements in Logging for most of them
  • Property svn:eol-style set to native
File size: 50.6 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.actions.mapmode;
3
4import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
5import static org.openstreetmap.josm.tools.I18n.marktr;
6import static org.openstreetmap.josm.tools.I18n.tr;
7
8import java.awt.BasicStroke;
9import java.awt.Color;
10import java.awt.Cursor;
11import java.awt.Graphics2D;
12import java.awt.Point;
13import java.awt.Rectangle;
14import java.awt.Stroke;
15import java.awt.event.ActionEvent;
16import java.awt.event.KeyEvent;
17import java.awt.event.MouseEvent;
18import java.awt.geom.AffineTransform;
19import java.awt.geom.GeneralPath;
20import java.awt.geom.Line2D;
21import java.awt.geom.NoninvertibleTransformException;
22import java.awt.geom.Point2D;
23import java.util.ArrayList;
24import java.util.Collection;
25import java.util.LinkedList;
26import java.util.List;
27
28import javax.swing.JCheckBoxMenuItem;
29import javax.swing.JMenuItem;
30
31import org.openstreetmap.josm.Main;
32import org.openstreetmap.josm.actions.JosmAction;
33import org.openstreetmap.josm.actions.MergeNodesAction;
34import org.openstreetmap.josm.command.AddCommand;
35import org.openstreetmap.josm.command.ChangeCommand;
36import org.openstreetmap.josm.command.Command;
37import org.openstreetmap.josm.command.MoveCommand;
38import org.openstreetmap.josm.command.SequenceCommand;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.coor.EastNorth;
41import org.openstreetmap.josm.data.osm.DataIntegrityProblemException;
42import org.openstreetmap.josm.data.osm.Node;
43import org.openstreetmap.josm.data.osm.OsmPrimitive;
44import org.openstreetmap.josm.data.osm.Way;
45import org.openstreetmap.josm.data.osm.WaySegment;
46import org.openstreetmap.josm.data.preferences.ColorProperty;
47import org.openstreetmap.josm.gui.MainMenu;
48import org.openstreetmap.josm.gui.MapView;
49import org.openstreetmap.josm.gui.draw.MapViewPath;
50import org.openstreetmap.josm.gui.draw.SymbolShape;
51import org.openstreetmap.josm.gui.layer.Layer;
52import org.openstreetmap.josm.gui.layer.MapViewPaintable;
53import org.openstreetmap.josm.gui.layer.OsmDataLayer;
54import org.openstreetmap.josm.gui.util.GuiHelper;
55import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
56import org.openstreetmap.josm.gui.util.ModifierExListener;
57import org.openstreetmap.josm.tools.Geometry;
58import org.openstreetmap.josm.tools.ImageProvider;
59import org.openstreetmap.josm.tools.Logging;
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, ModifierExListener {
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 * @since 11713
214 */
215 public ExtrudeAction() {
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 ImageProvider.getCursor("normal", "rectangle"));
219 putValue("help", ht("/Action/Extrude"));
220 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
221 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
222 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
223
224 dualAlignEnabled = false;
225 dualAlignChangeAction = new DualAlignChangeAction();
226 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
227 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
228 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
229 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
230 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
231 readPreferences(); // to show prefernces in table before entering the mode
232 }
233
234 @Override
235 public void destroy() {
236 super.destroy();
237 dualAlignChangeAction.destroy();
238 }
239
240 private JCheckBoxMenuItem addDualAlignMenuItem() {
241 int n = Main.main.menu.editMenu.getItemCount();
242 for (int i = n-1; i > 0; i--) {
243 JMenuItem item = Main.main.menu.editMenu.getItem(i);
244 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
245 Main.main.menu.editMenu.remove(i);
246 }
247 }
248 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
249 }
250
251 // -------------------------------------------------------------------------
252 // Mode methods
253 // -------------------------------------------------------------------------
254
255 @Override
256 public String getModeHelpText() {
257 StringBuilder rv;
258 if (mode == Mode.select) {
259 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
260 "Alt-drag to create a new rectangle, double click to add a new node."));
261 if (dualAlignEnabled) {
262 rv.append(' ').append(tr("Dual alignment active."));
263 if (dualAlignSegmentCollapsed)
264 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
265 }
266 } else {
267 if (mode == Mode.translate)
268 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
269 else if (mode == Mode.translate_node)
270 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
271 else if (mode == Mode.extrude || mode == Mode.create_new)
272 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
273 else {
274 Logging.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 ignoreNextKeyRelease = true;
298 Main.map.keyDetector.addKeyListener(this);
299 Main.map.keyDetector.addModifierExListener(this);
300 }
301
302 @Override
303 protected void readPreferences() {
304 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
305 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
306 mainColor = new ColorProperty(marktr("Extrude: main line"), Color.RED).get();
307 helperColor = new ColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
308 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
309 helperStrokeRA = new BasicStroke(1);
310 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
311 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
312 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
313 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
314
315 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
316 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
317 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
318 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
319 }
320
321 @Override
322 public void exitMode() {
323 Main.map.mapView.removeMouseListener(this);
324 Main.map.mapView.removeMouseMotionListener(this);
325 Main.map.mapView.removeTemporaryLayer(this);
326 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
327 Main.map.keyDetector.removeKeyListener(this);
328 Main.map.keyDetector.removeModifierExListener(this);
329 super.exitMode();
330 }
331
332 // -------------------------------------------------------------------------
333 // Event handlers
334 // -------------------------------------------------------------------------
335
336 /**
337 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
338 */
339 @Override
340 public void modifiersExChanged(int modifiers) {
341 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
342 return;
343 updateKeyModifiersEx(modifiers);
344 if (mode == Mode.select) {
345 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
346 }
347 }
348
349 @Override
350 public void doKeyPressed(KeyEvent e) {
351 // Do nothing
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::isSelectable);
393 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
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 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
429 alwaysCreateNodes = true;
430 } else {
431 mode = Mode.extrude;
432 getLayerManager().getEditDataSet().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 if (bestMovement != null) {
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 try {
540 // main extrusion commands
541 performExtrusion();
542 } catch (DataIntegrityProblemException ex) {
543 // Can occur if calling undo while extruding, see #12870
544 Logging.error(ex);
545 }
546 }
547 } else if (mode == Mode.translate || mode == Mode.translate_node) {
548 //Commit translate
549 //the move command is already committed in mouseDragged
550 joinNodesIfCollapsed(movingNodeList);
551 }
552
553 updateKeyModifiers(e);
554 // Switch back into select mode
555 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
556 Main.map.mapView.removeTemporaryLayer(this);
557 selectedSegment = null;
558 moveCommand = null;
559 mode = Mode.select;
560 dualAlignSegmentCollapsed = false;
561 updateStatusLine();
562 Main.map.mapView.repaint();
563 }
564 }
565
566 // -------------------------------------------------------------------------
567 // Custom methods
568 // -------------------------------------------------------------------------
569
570 /**
571 * Inserts node into nearby segment.
572 * @param e current mouse point
573 */
574 private static void addNewNode(MouseEvent e) {
575 // Should maybe do the same as in DrawAction and fetch all nearby segments?
576 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
577 if (ws != null) {
578 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
579 EastNorth a = ws.getFirstNode().getEastNorth();
580 EastNorth b = ws.getSecondNode().getEastNorth();
581 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
582 Way wnew = new Way(ws.way);
583 wnew.addNode(ws.lowerIndex+1, n);
584 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
585 new AddCommand(n), new ChangeCommand(ws.way, wnew));
586 Main.main.undoRedo.add(cmds);
587 }
588 }
589
590 /**
591 * Creates a new way that shares segment with selected way.
592 */
593 private void createNewRectangle() {
594 if (selectedSegment == null) return;
595 // crete a new rectangle
596 Collection<Command> cmds = new LinkedList<>();
597 Node third = new Node(newN2en);
598 Node fourth = new Node(newN1en);
599 Way wnew = new Way();
600 wnew.addNode(selectedSegment.getFirstNode());
601 wnew.addNode(selectedSegment.getSecondNode());
602 wnew.addNode(third);
603 if (!dualAlignSegmentCollapsed) {
604 // rectangle can degrade to triangle for dual alignment after collapsing
605 wnew.addNode(fourth);
606 }
607 // ... and close the way
608 wnew.addNode(selectedSegment.getFirstNode());
609 // undo support
610 cmds.add(new AddCommand(third));
611 if (!dualAlignSegmentCollapsed) {
612 cmds.add(new AddCommand(fourth));
613 }
614 cmds.add(new AddCommand(wnew));
615 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
616 Main.main.undoRedo.add(c);
617 getLayerManager().getEditDataSet().setSelected(wnew);
618 }
619
620 /**
621 * Does actual extrusion of {@link #selectedSegment}.
622 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
623 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
624 */
625 private void performExtrusion() {
626 // create extrusion
627 Collection<Command> cmds = new LinkedList<>();
628 Way wnew = new Way(selectedSegment.way);
629 boolean wayWasModified = false;
630 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
631 int insertionPoint = selectedSegment.lowerIndex + 1;
632
633 //find if the new points overlap existing segments (in case of 90 degree angles)
634 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
635 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
636 // segmentAngleZero marks subset of nodeOverlapsSegment.
637 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
638 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
639 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
640 List<Node> changedNodes = new ArrayList<>();
641 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
642 //move existing node
643 Node n1Old = selectedSegment.getFirstNode();
644 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
645 changedNodes.add(n1Old);
646 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
647 // replace shared node with new one
648 Node n1Old = selectedSegment.getFirstNode();
649 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
650 wnew.addNode(insertionPoint, n1New);
651 wnew.removeNode(n1Old);
652 wayWasModified = true;
653 cmds.add(new AddCommand(n1New));
654 changedNodes.add(n1New);
655 } else {
656 //introduce new node
657 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
658 wnew.addNode(insertionPoint, n1New);
659 wayWasModified = true;
660 insertionPoint++;
661 cmds.add(new AddCommand(n1New));
662 changedNodes.add(n1New);
663 }
664
665 //find if the new points overlap existing segments (in case of 90 degree angles)
666 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
667 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
668 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
669 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
670
671 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
672 //move existing node
673 Node n2Old = selectedSegment.getSecondNode();
674 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
675 changedNodes.add(n2Old);
676 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
677 // replace shared node with new one
678 Node n2Old = selectedSegment.getSecondNode();
679 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
680 wnew.addNode(insertionPoint, n2New);
681 wnew.removeNode(n2Old);
682 wayWasModified = true;
683 cmds.add(new AddCommand(n2New));
684 changedNodes.add(n2New);
685 } else {
686 //introduce new node
687 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
688 wnew.addNode(insertionPoint, n2New);
689 wayWasModified = true;
690 cmds.add(new AddCommand(n2New));
691 changedNodes.add(n2New);
692 }
693
694 //the way was a single segment, close the way
695 if (wayWasSingleSegment) {
696 wnew.addNode(selectedSegment.getFirstNode());
697 wayWasModified = true;
698 }
699 if (wayWasModified) {
700 // we only need to change the way if its node list was really modified
701 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
702 }
703 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
704 Main.main.undoRedo.add(c);
705 joinNodesIfCollapsed(changedNodes);
706 }
707
708 private void joinNodesIfCollapsed(List<Node> changedNodes) {
709 if (!dualAlignActive || newN1en == null || newN2en == null) return;
710 if (newN1en.distance(newN2en) > 1e-6) return;
711 // If the dual alignment moved two nodes to the same point, merge them
712 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
713 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
714 Command mergeCmd = MergeNodesAction.mergeNodes(Main.getLayerManager().getEditLayer(), changedNodes, targetNode, locNode);
715 if (mergeCmd != null) {
716 Main.main.undoRedo.add(mergeCmd);
717 } else {
718 // undo extruding command itself
719 Main.main.undoRedo.undo();
720 }
721 }
722
723 /**
724 * This method tests if {@code node} has other ways apart from the given one.
725 * @param node node to test
726 * @param myWay way known to contain this node
727 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
728 */
729 private static boolean hasNodeOtherWays(Node node, Way myWay) {
730 for (OsmPrimitive p : node.getReferrers()) {
731 if (p instanceof Way && p.isUsable() && p != myWay)
732 return true;
733 }
734 return false;
735 }
736
737 /**
738 * Determines best movement from {@link #initialMousePos} to current mouse position,
739 * choosing one of the directions from {@link #possibleMoveDirections}.
740 * @param mouseEn current mouse position
741 * @return movement vector
742 */
743 private EastNorth calculateBestMovement(EastNorth mouseEn) {
744
745 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
746 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
747
748 double bestDistance = Double.POSITIVE_INFINITY;
749 EastNorth bestMovement = null;
750 activeMoveDirection = null;
751
752 //find the best movement direction and vector
753 for (ReferenceSegment direction : possibleMoveDirections) {
754 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
755 if (movement == null) {
756 //if direction parallel to segment.
757 continue;
758 }
759
760 double distanceFromMouseMovement = movement.distance(mouseMovement);
761 if (bestDistance > distanceFromMouseMovement) {
762 bestDistance = distanceFromMouseMovement;
763 activeMoveDirection = direction;
764 bestMovement = movement;
765 }
766 }
767 return bestMovement;
768 }
769
770 /***
771 * This method calculates offset amount by which to move the given segment
772 * perpendicularly for it to be in line with mouse position.
773 * @param segmentP1 segment's first point
774 * @param segmentP2 segment's second point
775 * @param moveDirection direction of movement
776 * @param targetPos mouse position
777 * @return offset amount of P1 and P2.
778 */
779 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
780 EastNorth targetPos) {
781 EastNorth intersectionPoint;
782 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
783 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
784 } else {
785 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
786 }
787
788 if (intersectionPoint == null)
789 return null;
790 else
791 //return distance form base to target position
792 return targetPos.subtract(intersectionPoint);
793 }
794
795 /**
796 * Gathers possible move directions - perpendicular to the selected segment
797 * and parallel to neighboring segments.
798 */
799 private void calculatePossibleDirectionsBySegment() {
800 // remember initial positions for segment nodes.
801 initialN1en = selectedSegment.getFirstNode().getEastNorth();
802 initialN2en = selectedSegment.getSecondNode().getEastNorth();
803
804 //add direction perpendicular to the selected segment
805 possibleMoveDirections = new ArrayList<>();
806 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
807 initialN1en.getY() - initialN2en.getY(),
808 initialN2en.getX() - initialN1en.getX()
809 ), initialN1en, initialN2en, true));
810
811
812 //add directions parallel to neighbor segments
813 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
814 if (prevNode != null) {
815 EastNorth en = prevNode.getEastNorth();
816 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
817 initialN1en.getX() - en.getX(),
818 initialN1en.getY() - en.getY()
819 ), initialN1en, en, false));
820 }
821
822 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
823 if (nextNode != null) {
824 EastNorth en = nextNode.getEastNorth();
825 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
826 initialN2en.getX() - en.getX(),
827 initialN2en.getY() - en.getY()
828 ), initialN2en, en, false));
829 }
830 }
831
832 /**
833 * Gathers possible move directions - along all adjacent segments.
834 */
835 private void calculatePossibleDirectionsByNode() {
836 // remember initial positions for segment nodes.
837 initialN1en = selectedNode.getEastNorth();
838 initialN2en = initialN1en;
839 possibleMoveDirections = new ArrayList<>();
840 for (OsmPrimitive p: selectedNode.getReferrers()) {
841 if (p instanceof Way && p.isUsable()) {
842 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
843 EastNorth en = neighbor.getEastNorth();
844 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
845 initialN1en.getX() - en.getX(),
846 initialN1en.getY() - en.getY()
847 ), initialN1en, en, false));
848 }
849 }
850 }
851 }
852
853 /**
854 * Checks dual alignment conditions:
855 * 1. selected segment has both neighboring segments,
856 * 2. selected segment is not parallel with neighboring segments.
857 * @return {@code true} if dual alignment conditions are satisfied
858 */
859 private boolean checkDualAlignConditions() {
860 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
861 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
862 if (prevNode == null || nextNode == null) {
863 return false;
864 }
865
866 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
867 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
868 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
869 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
870 return false;
871 }
872
873 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
874 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
875 return !prevSegmentParallel && !nextSegmentParallel;
876 }
877
878 /**
879 * Gathers possible move directions - perpendicular to the selected segment only.
880 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
881 */
882 private void calculatePossibleDirectionsForDualAlign() {
883 // remember initial positions for segment nodes.
884 initialN1en = selectedSegment.getFirstNode().getEastNorth();
885 initialN2en = selectedSegment.getSecondNode().getEastNorth();
886
887 // add direction perpendicular to the selected segment
888 possibleMoveDirections = new ArrayList<>();
889 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
890 initialN1en.getY() - initialN2en.getY(),
891 initialN2en.getX() - initialN1en.getX()
892 ), initialN1en, initialN2en, true));
893
894 // set neighboring segments
895 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
896 if (prevNode != null) {
897 EastNorth prevNodeEn = prevNode.getEastNorth();
898 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
899 initialN1en.getX() - prevNodeEn.getX(),
900 initialN1en.getY() - prevNodeEn.getY()
901 ), initialN1en, prevNodeEn, false);
902 }
903
904 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
905 if (nextNode != null) {
906 EastNorth nextNodeEn = nextNode.getEastNorth();
907 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
908 initialN2en.getX() - nextNodeEn.getX(),
909 initialN2en.getY() - nextNodeEn.getY()
910 ), initialN2en, nextNodeEn, false);
911 }
912 }
913
914 /**
915 * Calculate newN1en, newN2en best suitable for given mouse coordinates
916 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
917 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
918 * @param mouseEn mouse coordinates
919 * @return best movement vector
920 */
921 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
922 EastNorth bestMovement = calculateBestMovement(mouseEn);
923 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
924
925 // find out the movement distance, in metres
926 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
927 Main.getProjection().eastNorth2latlon(n1movedEn));
928 Main.map.statusLine.setDist(distance);
929 updateStatusLine();
930
931 if (dualAlignActive) {
932 // new positions of selected segment's nodes, without applying dual alignment
933 n1movedEn = initialN1en.add(bestMovement);
934 n2movedEn = initialN2en.add(bestMovement);
935
936 // calculate intersections of parallel shifted segment and the adjacent lines
937 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
938 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
939 if (newN1en == null || newN2en == null) return bestMovement;
940 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
941 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
942 dualAlignSegment2.p1, dualAlignSegment2.p2);
943 newN1en = collapsedSegmentPosition;
944 newN2en = collapsedSegmentPosition;
945 dualAlignSegmentCollapsed = true;
946 } else {
947 dualAlignSegmentCollapsed = false;
948 }
949 } else {
950 newN1en = n1movedEn;
951 newN2en = initialN2en.add(bestMovement);
952 }
953 return bestMovement;
954 }
955
956 /**
957 * Gets a node index from selected way before given index.
958 * @param index index of current node
959 * @return index of previous node or <code>-1</code> if there are no nodes there.
960 */
961 private int getPreviousNodeIndex(int index) {
962 if (index > 0)
963 return index - 1;
964 else if (selectedSegment.way.isClosed())
965 return selectedSegment.way.getNodesCount() - 2;
966 else
967 return -1;
968 }
969
970 /**
971 * Gets a node from selected way before given index.
972 * @param index index of current node
973 * @return previous node or <code>null</code> if there are no nodes there.
974 */
975 private Node getPreviousNode(int index) {
976 int indexPrev = getPreviousNodeIndex(index);
977 if (indexPrev >= 0)
978 return selectedSegment.way.getNode(indexPrev);
979 else
980 return null;
981 }
982
983
984 /**
985 * Gets a node index from selected way after given index.
986 * @param index index of current node
987 * @return index of next node or <code>-1</code> if there are no nodes there.
988 */
989 private int getNextNodeIndex(int index) {
990 int count = selectedSegment.way.getNodesCount();
991 if (index < count - 1)
992 return index + 1;
993 else if (selectedSegment.way.isClosed())
994 return 1;
995 else
996 return -1;
997 }
998
999 /**
1000 * Gets a node from selected way after given index.
1001 * @param index index of current node
1002 * @return next node or <code>null</code> if there are no nodes there.
1003 */
1004 private Node getNextNode(int index) {
1005 int indexNext = getNextNodeIndex(index);
1006 if (indexNext >= 0)
1007 return selectedSegment.way.getNode(indexNext);
1008 else
1009 return null;
1010 }
1011
1012 // -------------------------------------------------------------------------
1013 // paint methods
1014 // -------------------------------------------------------------------------
1015
1016 @Override
1017 public void paint(Graphics2D g, MapView mv, Bounds box) {
1018 Graphics2D g2 = g;
1019 if (mode == Mode.select) {
1020 // Nothing to do
1021 } else {
1022 if (newN1en != null) {
1023
1024 EastNorth p1 = initialN1en;
1025 EastNorth p2 = initialN2en;
1026 EastNorth p3 = newN1en;
1027 EastNorth p4 = newN2en;
1028
1029 Point2D normalUnitVector = activeMoveDirection != null ? getNormalUniVector() : null;
1030
1031 if (mode == Mode.extrude || mode == Mode.create_new) {
1032 g2.setColor(mainColor);
1033 g2.setStroke(mainStroke);
1034 // Draw rectangle around new area.
1035 MapViewPath b = new MapViewPath(mv);
1036 b.moveTo(p1);
1037 b.lineTo(p3);
1038 b.lineTo(p4);
1039 b.lineTo(p2);
1040 b.lineTo(p1);
1041 g2.draw(b);
1042
1043 if (dualAlignActive) {
1044 // Draw reference ways
1045 drawReferenceSegment(g2, mv, dualAlignSegment1);
1046 drawReferenceSegment(g2, mv, dualAlignSegment2);
1047 } else if (activeMoveDirection != null && normalUnitVector != null) {
1048 // Draw reference way
1049 drawReferenceSegment(g2, mv, activeMoveDirection);
1050
1051 // Draw right angle marker on first node position, only when moving at right angle
1052 if (activeMoveDirection.perpendicular) {
1053 // mirror RightAngle marker, so it is inside the extrude
1054 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1055 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1056 double headingDiff = headingRefWS - headingMoveDir;
1057 if (headingDiff < 0)
1058 headingDiff += 2 * Math.PI;
1059 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1060 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1061 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1062 }
1063 }
1064 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1065 g2.setColor(mainColor);
1066 if (p1.distance(p2) < 3) {
1067 g2.setStroke(mainStroke);
1068 g2.draw(new MapViewPath(mv).shapeAround(p1, SymbolShape.CIRCLE, symbolSize));
1069 } else {
1070 g2.setStroke(oldLineStroke);
1071 g2.draw(new MapViewPath(mv).moveTo(p1).lineTo(p2));
1072 }
1073
1074 if (dualAlignActive) {
1075 // Draw reference ways
1076 drawReferenceSegment(g2, mv, dualAlignSegment1);
1077 drawReferenceSegment(g2, mv, dualAlignSegment2);
1078 } else if (activeMoveDirection != null) {
1079
1080 g2.setColor(helperColor);
1081 g2.setStroke(helperStrokeDash);
1082 // Draw a guideline along the normal.
1083 Line2D normline;
1084 Point2D centerpoint = mv.getPoint2D(p1.interpolate(p2, .5));
1085 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1086 g2.draw(normline);
1087 // Draw right angle marker on initial position, only when moving at right angle
1088 if (activeMoveDirection.perpendicular) {
1089 // EastNorth units per pixel
1090 g2.setStroke(helperStrokeRA);
1091 g2.setColor(mainColor);
1092 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1093 }
1094 }
1095 }
1096 }
1097 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1098 }
1099 }
1100
1101 private Point2D getNormalUniVector() {
1102 double fac = 1.0 / activeMoveDirection.en.length();
1103 // mult by factor to get unit vector.
1104 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1105
1106 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1107 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1108 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1109 // If not, use a sign-flipped version of the normalUnitVector.
1110 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1111 }
1112
1113 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1114 //This is normally done by MapView.getPoint, but it does not work on vectors.
1115 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1116 return normalUnitVector;
1117 }
1118
1119 /**
1120 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1121 * @param from1 vector1 start
1122 * @param to1 vector1 end
1123 * @param from2 vector2 start
1124 * @param to2 vector2 end
1125 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1126 */
1127 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1128 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1129 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1130 }
1131
1132 /**
1133 * Draws right angle symbol at specified position.
1134 * @param g2 the Graphics2D object used to draw on
1135 * @param center center point of angle
1136 * @param normal vector of normal
1137 * @param mirror {@code true} if symbol should be mirrored by the normal
1138 */
1139 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1140 // EastNorth units per pixel
1141 double factor = 1.0/g2.getTransform().getScaleX();
1142 double raoffsetx = symbolSize*factor*normal.getX();
1143 double raoffsety = symbolSize*factor*normal.getY();
1144
1145 double cx = center.getX(), cy = center.getY();
1146 double k = mirror ? -1 : 1;
1147 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1148 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1149 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1150
1151 GeneralPath ra = new GeneralPath();
1152 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1153 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1154 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1155 g2.setStroke(helperStrokeRA);
1156 g2.draw(ra);
1157 }
1158
1159 /**
1160 * Draws given reference segment.
1161 * @param g2 the Graphics2D object used to draw on
1162 * @param mv map view
1163 * @param seg the reference segment
1164 */
1165 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1166 g2.setColor(helperColor);
1167 g2.setStroke(helperStrokeDash);
1168 g2.draw(new MapViewPath(mv).moveTo(seg.p1).lineTo(seg.p2));
1169 }
1170
1171 /**
1172 * Creates a new Line that extends off the edge of the viewport in one direction
1173 * @param start The start point of the line
1174 * @param unitvector A unit vector denoting the direction of the line
1175 * @param g the Graphics2D object it will be used on
1176 * @return created line
1177 */
1178 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1179 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1180 try {
1181 AffineTransform invtrans = g.getTransform().createInverse();
1182 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1183 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1184
1185 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1186 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1187 // This can be used as a safe length of line to generate which will always go off-viewport.
1188 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1189 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1190
1191 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1192 + (unitvector.getY() * linelength)));
1193 } catch (NoninvertibleTransformException e) {
1194 Logging.debug(e);
1195 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1196 + (unitvector.getY() * 10)));
1197 }
1198 }
1199}
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