source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 10853

Last change on this file since 10853 was 10853, checked in by Don-vip, 8 years ago

see #13309 - fix most of deprecation warnings
  • Property svn:eol-style set to native
File size: 50.7 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.data.preferences.ColorProperty;
47import org.openstreetmap.josm.gui.MainMenu;
48import org.openstreetmap.josm.gui.MapFrame;
49import org.openstreetmap.josm.gui.MapView;
50import org.openstreetmap.josm.gui.layer.Layer;
51import org.openstreetmap.josm.gui.layer.MapViewPaintable;
52import org.openstreetmap.josm.gui.layer.OsmDataLayer;
53import org.openstreetmap.josm.gui.util.GuiHelper;
54import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
55import org.openstreetmap.josm.gui.util.ModifierListener;
56import org.openstreetmap.josm.tools.Geometry;
57import org.openstreetmap.josm.tools.ImageProvider;
58import org.openstreetmap.josm.tools.Shortcut;
59
60/**
61 * Makes a rectangle from a line, or modifies a rectangle.
62 */
63public class ExtrudeAction extends MapMode implements MapViewPaintable, KeyPressReleaseListener, ModifierListener {
64
65 enum Mode { extrude, translate, select, create_new, translate_node }
66
67 private Mode mode = Mode.select;
68
69 /**
70 * If {@code true}, when extruding create new node(s) even if segments are parallel.
71 */
72 private boolean alwaysCreateNodes;
73 private boolean nodeDragWithoutCtrl;
74
75 private long mouseDownTime;
76 private transient WaySegment selectedSegment;
77 private transient Node selectedNode;
78 private Color mainColor;
79 private transient Stroke mainStroke;
80
81 /** settings value whether shared nodes should be ignored or not */
82 private boolean ignoreSharedNodes;
83
84 private boolean keepSegmentDirection;
85
86 /**
87 * drawing settings for helper lines
88 */
89 private Color helperColor;
90 private transient Stroke helperStrokeDash;
91 private transient Stroke helperStrokeRA;
92
93 private transient Stroke oldLineStroke;
94 private double symbolSize;
95 /**
96 * Possible directions to move to.
97 */
98 private transient List<ReferenceSegment> possibleMoveDirections;
99
100
101 /**
102 * Collection of nodes that is moved
103 */
104 private transient List<Node> movingNodeList;
105
106 /**
107 * The direction that is currently active.
108 */
109 private transient ReferenceSegment activeMoveDirection;
110
111 /**
112 * The position of the mouse cursor when the drag action was initiated.
113 */
114 private Point initialMousePos;
115 /**
116 * The time which needs to pass between click and release before something
117 * counts as a move, in milliseconds
118 */
119 private int initialMoveDelay = 200;
120 /**
121 * The minimal shift of mouse (in pixels) befire something counts as move
122 */
123 private int initialMoveThreshold = 1;
124
125 /**
126 * The initial EastNorths of node1 and node2
127 */
128 private EastNorth initialN1en;
129 private EastNorth initialN2en;
130 /**
131 * The new EastNorths of node1 and node2
132 */
133 private EastNorth newN1en;
134 private EastNorth newN2en;
135
136 /**
137 * the command that performed last move.
138 */
139 private transient MoveCommand moveCommand;
140 /**
141 * The command used for dual alignment movement.
142 * Needs to be separate, due to two nodes moving in different directions.
143 */
144 private transient MoveCommand moveCommand2;
145
146 /** The cursor for the 'create_new' mode. */
147 private final Cursor cursorCreateNew;
148
149 /** The cursor for the 'translate' mode. */
150 private final Cursor cursorTranslate;
151
152 /** The cursor for the 'alwaysCreateNodes' submode. */
153 private final Cursor cursorCreateNodes;
154
155 private static class ReferenceSegment {
156 public final EastNorth en;
157 public final EastNorth p1;
158 public final EastNorth p2;
159 public final boolean perpendicular;
160
161 ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
162 this.en = en;
163 this.p1 = p1;
164 this.p2 = p2;
165 this.perpendicular = perpendicular;
166 }
167
168 @Override
169 public String toString() {
170 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + ']';
171 }
172 }
173
174 // Dual alignment mode stuff
175 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
176 private boolean dualAlignEnabled;
177 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met.
178 * Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
179 private boolean dualAlignActive;
180 /** Dual alignment reference segments */
181 private transient ReferenceSegment dualAlignSegment1, dualAlignSegment2;
182 /** {@code true}, if new segment was collapsed */
183 private boolean dualAlignSegmentCollapsed;
184 // Dual alignment UI stuff
185 private final DualAlignChangeAction dualAlignChangeAction;
186 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
187 private final transient Shortcut dualAlignShortcut;
188 private boolean useRepeatedShortcut;
189 private boolean ignoreNextKeyRelease;
190
191 private class DualAlignChangeAction extends JosmAction {
192 DualAlignChangeAction() {
193 super(tr("Dual alignment"), /* ICON() */ "mapmode/extrude/dualalign",
194 tr("Switch dual alignment mode while extruding"), null, false);
195 putValue("help", ht("/Action/Extrude#DualAlign"));
196 }
197
198 @Override
199 public void actionPerformed(ActionEvent e) {
200 toggleDualAlign();
201 }
202
203 @Override
204 protected void updateEnabledState() {
205 setEnabled(Main.map != null && Main.map.mapMode instanceof ExtrudeAction);
206 }
207 }
208
209 /**
210 * Creates a new ExtrudeAction
211 * @param mapFrame The MapFrame this action belongs to.
212 */
213 public ExtrudeAction(MapFrame mapFrame) {
214 super(tr("Extrude"), /* ICON(mapmode/) */ "extrude/extrude", tr("Create areas"),
215 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
216 mapFrame,
217 ImageProvider.getCursor("normal", "rectangle"));
218 putValue("help", ht("/Action/Extrude"));
219 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
220 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
221 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
222
223 dualAlignEnabled = false;
224 dualAlignChangeAction = new DualAlignChangeAction();
225 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
226 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
227 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
228 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
229 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
230 readPreferences(); // to show prefernces in table before entering the mode
231 }
232
233 @Override
234 public void destroy() {
235 super.destroy();
236 dualAlignChangeAction.destroy();
237 }
238
239 private JCheckBoxMenuItem addDualAlignMenuItem() {
240 int n = Main.main.menu.editMenu.getItemCount();
241 for (int i = n-1; i > 0; i--) {
242 JMenuItem item = Main.main.menu.editMenu.getItem(i);
243 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
244 Main.main.menu.editMenu.remove(i);
245 }
246 }
247 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
248 }
249
250 // -------------------------------------------------------------------------
251 // Mode methods
252 // -------------------------------------------------------------------------
253
254 @Override
255 public String getModeHelpText() {
256 StringBuilder rv;
257 if (mode == Mode.select) {
258 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
259 "Alt-drag to create a new rectangle, double click to add a new node."));
260 if (dualAlignEnabled) {
261 rv.append(' ').append(tr("Dual alignment active."));
262 if (dualAlignSegmentCollapsed)
263 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
264 }
265 } else {
266 if (mode == Mode.translate)
267 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
268 else if (mode == Mode.translate_node)
269 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
270 else if (mode == Mode.extrude)
271 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
272 else if (mode == Mode.create_new)
273 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
274 else {
275 Main.warn("Extrude: unknown mode " + mode);
276 rv = new StringBuilder();
277 }
278 if (dualAlignActive) {
279 rv.append(' ').append(tr("Dual alignment active."));
280 if (dualAlignSegmentCollapsed) {
281 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
282 }
283 }
284 }
285 return rv.toString();
286 }
287
288 @Override
289 public boolean layerIsSupported(Layer l) {
290 return l instanceof OsmDataLayer;
291 }
292
293 @Override
294 public void enterMode() {
295 super.enterMode();
296 Main.map.mapView.addMouseListener(this);
297 Main.map.mapView.addMouseMotionListener(this);
298 ignoreNextKeyRelease = true;
299 Main.map.keyDetector.addKeyListener(this);
300 Main.map.keyDetector.addModifierListener(this);
301 }
302
303 @Override
304 protected void readPreferences() {
305 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
306 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
307 mainColor = new ColorProperty(marktr("Extrude: main line"), (Color) null).get();
308 if (mainColor == null) mainColor = PaintColors.SELECTED.get();
309 helperColor = new ColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
310 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
311 helperStrokeRA = new BasicStroke(1);
312 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
313 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
314 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
315 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
316
317 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
318 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
319 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
320 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
321 }
322
323 @Override
324 public void exitMode() {
325 Main.map.mapView.removeMouseListener(this);
326 Main.map.mapView.removeMouseMotionListener(this);
327 Main.map.mapView.removeTemporaryLayer(this);
328 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
329 Main.map.keyDetector.removeKeyListener(this);
330 Main.map.keyDetector.removeModifierListener(this);
331 super.exitMode();
332 }
333
334 // -------------------------------------------------------------------------
335 // Event handlers
336 // -------------------------------------------------------------------------
337
338 /**
339 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
340 */
341 @Override
342 public void modifiersChanged(int modifiers) {
343 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
344 return;
345 updateKeyModifiers(modifiers);
346 if (mode == Mode.select) {
347 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
348 }
349 }
350
351 @Override
352 public void doKeyPressed(KeyEvent e) {
353 // Do nothing
354 }
355
356 @Override
357 public void doKeyReleased(KeyEvent e) {
358 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
359 return;
360 if (ignoreNextKeyRelease) {
361 ignoreNextKeyRelease = false;
362 } else {
363 toggleDualAlign();
364 }
365 }
366
367 /**
368 * Toggles dual alignment mode.
369 */
370 private void toggleDualAlign() {
371 dualAlignEnabled = !dualAlignEnabled;
372 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
373 updateStatusLine();
374 }
375
376 /**
377 * If the left mouse button is pressed over a segment or a node, switches
378 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
379 * {@link #dualAlignEnabled}.
380 * @param e current mouse event
381 */
382 @Override
383 public void mousePressed(MouseEvent e) {
384 if (!Main.map.mapView.isActiveLayerVisible())
385 return;
386 if (!(Boolean) this.getValue("active"))
387 return;
388 if (e.getButton() != MouseEvent.BUTTON1)
389 return;
390
391 requestFocusInMapView();
392 updateKeyModifiers(e);
393
394 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive::isSelectable);
395 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
396
397 // If nothing gets caught, stay in select mode
398 if (selectedSegment == null && selectedNode == null) return;
399
400 if (selectedNode != null) {
401 if (ctrl || nodeDragWithoutCtrl) {
402 movingNodeList = new ArrayList<>();
403 movingNodeList.add(selectedNode);
404 calculatePossibleDirectionsByNode();
405 if (possibleMoveDirections.isEmpty()) {
406 // if no directions fould, do not enter dragging mode
407 return;
408 }
409 mode = Mode.translate_node;
410 dualAlignActive = false;
411 }
412 } else {
413 // Otherwise switch to another mode
414 if (dualAlignEnabled && checkDualAlignConditions()) {
415 dualAlignActive = true;
416 calculatePossibleDirectionsForDualAlign();
417 dualAlignSegmentCollapsed = false;
418 } else {
419 dualAlignActive = false;
420 calculatePossibleDirectionsBySegment();
421 }
422 if (ctrl) {
423 mode = Mode.translate;
424 movingNodeList = new ArrayList<>();
425 movingNodeList.add(selectedSegment.getFirstNode());
426 movingNodeList.add(selectedSegment.getSecondNode());
427 } else if (alt) {
428 mode = Mode.create_new;
429 // create a new segment and then select and extrude the new segment
430 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
431 alwaysCreateNodes = true;
432 } else {
433 mode = Mode.extrude;
434 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
435 alwaysCreateNodes = shift;
436 }
437 }
438
439 // Signifies that nothing has happened yet
440 newN1en = null;
441 newN2en = null;
442 moveCommand = null;
443 moveCommand2 = null;
444
445 Main.map.mapView.addTemporaryLayer(this);
446
447 updateStatusLine();
448 Main.map.mapView.repaint();
449
450 // Make note of time pressed
451 mouseDownTime = System.currentTimeMillis();
452
453 // Make note of mouse position
454 initialMousePos = e.getPoint();
455 }
456
457 /**
458 * Performs action depending on what {@link #mode} we're in.
459 * @param e current mouse event
460 */
461 @Override
462 public void mouseDragged(MouseEvent e) {
463 if (!Main.map.mapView.isActiveLayerVisible())
464 return;
465
466 // do not count anything as a drag if it lasts less than 100 milliseconds.
467 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
468 return;
469
470 if (mode == Mode.select) {
471 // Just sit tight and wait for mouse to be released.
472 } else {
473 //move, create new and extrude mode - move the selected segment
474
475 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
476 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
477
478 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
479
480 if (dualAlignActive) {
481 if (mode == Mode.extrude || mode == Mode.create_new) {
482 // nothing here
483 } else if (mode == Mode.translate) {
484 EastNorth movement1 = newN1en.subtract(initialN1en);
485 EastNorth movement2 = newN2en.subtract(initialN2en);
486 // move nodes to new position
487 if (moveCommand == null || moveCommand2 == null) {
488 // make a new move commands
489 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
490 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
491 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
492 Main.main.undoRedo.add(c);
493 } else {
494 // reuse existing move commands
495 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
496 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
497 }
498 }
499 } else {
500 if (mode == Mode.extrude || mode == Mode.create_new) {
501 //nothing here
502 } else if (mode == Mode.translate_node || mode == Mode.translate) {
503 //move nodes to new position
504 if (moveCommand == null) {
505 //make a new move command
506 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
507 Main.main.undoRedo.add(moveCommand);
508 } else {
509 //reuse existing move command
510 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
511 }
512 }
513 }
514
515 Main.map.mapView.repaint();
516 }
517 }
518
519 /**
520 * Does anything that needs to be done, then switches back to select mode.
521 * @param e current mouse event
522 */
523 @Override
524 public void mouseReleased(MouseEvent e) {
525
526 if (!Main.map.mapView.isActiveLayerVisible())
527 return;
528
529 if (mode == Mode.select) {
530 // Nothing to be done
531 } else {
532 if (mode == Mode.create_new) {
533 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
534 createNewRectangle();
535 }
536 } else if (mode == Mode.extrude) {
537 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
538 // double click adds a new node
539 addNewNode(e);
540 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
541 // main extrusion commands
542 performExtrusion();
543 }
544 } else if (mode == Mode.translate || mode == Mode.translate_node) {
545 //Commit translate
546 //the move command is already committed in mouseDragged
547 joinNodesIfCollapsed(movingNodeList);
548 }
549
550 updateKeyModifiers(e);
551 // Switch back into select mode
552 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
553 Main.map.mapView.removeTemporaryLayer(this);
554 selectedSegment = null;
555 moveCommand = null;
556 mode = Mode.select;
557 dualAlignSegmentCollapsed = false;
558 updateStatusLine();
559 Main.map.mapView.repaint();
560 }
561 }
562
563 // -------------------------------------------------------------------------
564 // Custom methods
565 // -------------------------------------------------------------------------
566
567 /**
568 * Inserts node into nearby segment.
569 * @param e current mouse point
570 */
571 private static void addNewNode(MouseEvent e) {
572 // Should maybe do the same as in DrawAction and fetch all nearby segments?
573 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
574 if (ws != null) {
575 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
576 EastNorth a = ws.getFirstNode().getEastNorth();
577 EastNorth b = ws.getSecondNode().getEastNorth();
578 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
579 Way wnew = new Way(ws.way);
580 wnew.addNode(ws.lowerIndex+1, n);
581 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
582 new AddCommand(n), new ChangeCommand(ws.way, wnew));
583 Main.main.undoRedo.add(cmds);
584 }
585 }
586
587 /**
588 * Creates a new way that shares segment with selected way.
589 */
590 private void createNewRectangle() {
591 if (selectedSegment == null) return;
592 // crete a new rectangle
593 Collection<Command> cmds = new LinkedList<>();
594 Node third = new Node(newN2en);
595 Node fourth = new Node(newN1en);
596 Way wnew = new Way();
597 wnew.addNode(selectedSegment.getFirstNode());
598 wnew.addNode(selectedSegment.getSecondNode());
599 wnew.addNode(third);
600 if (!dualAlignSegmentCollapsed) {
601 // rectangle can degrade to triangle for dual alignment after collapsing
602 wnew.addNode(fourth);
603 }
604 // ... and close the way
605 wnew.addNode(selectedSegment.getFirstNode());
606 // undo support
607 cmds.add(new AddCommand(third));
608 if (!dualAlignSegmentCollapsed) {
609 cmds.add(new AddCommand(fourth));
610 }
611 cmds.add(new AddCommand(wnew));
612 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
613 Main.main.undoRedo.add(c);
614 getLayerManager().getEditDataSet().setSelected(wnew);
615 }
616
617 /**
618 * Does actual extrusion of {@link #selectedSegment}.
619 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
620 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
621 */
622 private void performExtrusion() {
623 // create extrusion
624 Collection<Command> cmds = new LinkedList<>();
625 Way wnew = new Way(selectedSegment.way);
626 boolean wayWasModified = false;
627 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
628 int insertionPoint = selectedSegment.lowerIndex + 1;
629
630 //find if the new points overlap existing segments (in case of 90 degree angles)
631 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
632 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
633 // segmentAngleZero marks subset of nodeOverlapsSegment.
634 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
635 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
636 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
637 List<Node> changedNodes = new ArrayList<>();
638 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
639 //move existing node
640 Node n1Old = selectedSegment.getFirstNode();
641 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
642 changedNodes.add(n1Old);
643 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
644 // replace shared node with new one
645 Node n1Old = selectedSegment.getFirstNode();
646 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
647 wnew.addNode(insertionPoint, n1New);
648 wnew.removeNode(n1Old);
649 wayWasModified = true;
650 cmds.add(new AddCommand(n1New));
651 changedNodes.add(n1New);
652 } else {
653 //introduce new node
654 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
655 wnew.addNode(insertionPoint, n1New);
656 wayWasModified = true;
657 insertionPoint++;
658 cmds.add(new AddCommand(n1New));
659 changedNodes.add(n1New);
660 }
661
662 //find if the new points overlap existing segments (in case of 90 degree angles)
663 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
664 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
665 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
666 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
667
668 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
669 //move existing node
670 Node n2Old = selectedSegment.getSecondNode();
671 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
672 changedNodes.add(n2Old);
673 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
674 // replace shared node with new one
675 Node n2Old = selectedSegment.getSecondNode();
676 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
677 wnew.addNode(insertionPoint, n2New);
678 wnew.removeNode(n2Old);
679 wayWasModified = true;
680 cmds.add(new AddCommand(n2New));
681 changedNodes.add(n2New);
682 } else {
683 //introduce new node
684 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
685 wnew.addNode(insertionPoint, n2New);
686 wayWasModified = true;
687 cmds.add(new AddCommand(n2New));
688 changedNodes.add(n2New);
689 }
690
691 //the way was a single segment, close the way
692 if (wayWasSingleSegment) {
693 wnew.addNode(selectedSegment.getFirstNode());
694 wayWasModified = true;
695 }
696 if (wayWasModified) {
697 // we only need to change the way if its node list was really modified
698 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
699 }
700 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
701 Main.main.undoRedo.add(c);
702 joinNodesIfCollapsed(changedNodes);
703 }
704
705 private void joinNodesIfCollapsed(List<Node> changedNodes) {
706 if (!dualAlignActive || newN1en == null || newN2en == null) return;
707 if (newN1en.distance(newN2en) > 1e-6) return;
708 // If the dual alignment moved two nodes to the same point, merge them
709 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
710 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
711 Command mergeCmd = MergeNodesAction.mergeNodes(Main.getLayerManager().getEditLayer(), changedNodes, targetNode, locNode);
712 if (mergeCmd != null) {
713 Main.main.undoRedo.add(mergeCmd);
714 } else {
715 // undo extruding command itself
716 Main.main.undoRedo.undo();
717 }
718 }
719
720 /**
721 * This method tests if {@code node} has other ways apart from the given one.
722 * @param node node to test
723 * @param myWay way known to contain this node
724 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
725 */
726 private static boolean hasNodeOtherWays(Node node, Way myWay) {
727 for (OsmPrimitive p : node.getReferrers()) {
728 if (p instanceof Way && p.isUsable() && p != myWay)
729 return true;
730 }
731 return false;
732 }
733
734 /**
735 * Determines best movement from {@link #initialMousePos} to current mouse position,
736 * choosing one of the directions from {@link #possibleMoveDirections}.
737 * @param mouseEn current mouse position
738 * @return movement vector
739 */
740 private EastNorth calculateBestMovement(EastNorth mouseEn) {
741
742 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
743 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
744
745 double bestDistance = Double.POSITIVE_INFINITY;
746 EastNorth bestMovement = null;
747 activeMoveDirection = null;
748
749 //find the best movement direction and vector
750 for (ReferenceSegment direction : possibleMoveDirections) {
751 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
752 if (movement == null) {
753 //if direction parallel to segment.
754 continue;
755 }
756
757 double distanceFromMouseMovement = movement.distance(mouseMovement);
758 if (bestDistance > distanceFromMouseMovement) {
759 bestDistance = distanceFromMouseMovement;
760 activeMoveDirection = direction;
761 bestMovement = movement;
762 }
763 }
764 return bestMovement;
765 }
766
767 /***
768 * This method calculates offset amount by which to move the given segment
769 * perpendicularly for it to be in line with mouse position.
770 * @param segmentP1 segment's first point
771 * @param segmentP2 segment's second point
772 * @param moveDirection direction of movement
773 * @param targetPos mouse position
774 * @return offset amount of P1 and P2.
775 */
776 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
777 EastNorth targetPos) {
778 EastNorth intersectionPoint;
779 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
780 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
781 } else {
782 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
783 }
784
785 if (intersectionPoint == null)
786 return null;
787 else
788 //return distance form base to target position
789 return targetPos.subtract(intersectionPoint);
790 }
791
792 /**
793 * Gathers possible move directions - perpendicular to the selected segment
794 * and parallel to neighboring segments.
795 */
796 private void calculatePossibleDirectionsBySegment() {
797 // remember initial positions for segment nodes.
798 initialN1en = selectedSegment.getFirstNode().getEastNorth();
799 initialN2en = selectedSegment.getSecondNode().getEastNorth();
800
801 //add direction perpendicular to the selected segment
802 possibleMoveDirections = new ArrayList<>();
803 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
804 initialN1en.getY() - initialN2en.getY(),
805 initialN2en.getX() - initialN1en.getX()
806 ), initialN1en, initialN2en, true));
807
808
809 //add directions parallel to neighbor segments
810 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
811 if (prevNode != null) {
812 EastNorth en = prevNode.getEastNorth();
813 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
814 initialN1en.getX() - en.getX(),
815 initialN1en.getY() - en.getY()
816 ), initialN1en, en, false));
817 }
818
819 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
820 if (nextNode != null) {
821 EastNorth en = nextNode.getEastNorth();
822 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
823 initialN2en.getX() - en.getX(),
824 initialN2en.getY() - en.getY()
825 ), initialN2en, en, false));
826 }
827 }
828
829 /**
830 * Gathers possible move directions - along all adjacent segments.
831 */
832 private void calculatePossibleDirectionsByNode() {
833 // remember initial positions for segment nodes.
834 initialN1en = selectedNode.getEastNorth();
835 initialN2en = initialN1en;
836 possibleMoveDirections = new ArrayList<>();
837 for (OsmPrimitive p: selectedNode.getReferrers()) {
838 if (p instanceof Way && p.isUsable()) {
839 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
840 EastNorth en = neighbor.getEastNorth();
841 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
842 initialN1en.getX() - en.getX(),
843 initialN1en.getY() - en.getY()
844 ), initialN1en, en, false));
845 }
846 }
847 }
848 }
849
850 /**
851 * Checks dual alignment conditions:
852 * 1. selected segment has both neighboring segments,
853 * 2. selected segment is not parallel with neighboring segments.
854 * @return {@code true} if dual alignment conditions are satisfied
855 */
856 private boolean checkDualAlignConditions() {
857 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
858 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
859 if (prevNode == null || nextNode == null) {
860 return false;
861 }
862
863 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
864 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
865 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
866 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
867 return false;
868 }
869
870 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
871 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
872 if (prevSegmentParallel || nextSegmentParallel) {
873 return false;
874 }
875
876 return true;
877 }
878
879 /**
880 * Gathers possible move directions - perpendicular to the selected segment only.
881 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
882 */
883 private void calculatePossibleDirectionsForDualAlign() {
884 // remember initial positions for segment nodes.
885 initialN1en = selectedSegment.getFirstNode().getEastNorth();
886 initialN2en = selectedSegment.getSecondNode().getEastNorth();
887
888 // add direction perpendicular to the selected segment
889 possibleMoveDirections = new ArrayList<>();
890 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
891 initialN1en.getY() - initialN2en.getY(),
892 initialN2en.getX() - initialN1en.getX()
893 ), initialN1en, initialN2en, true));
894
895 // set neighboring segments
896 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
897 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 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
904 EastNorth nextNodeEn = nextNode.getEastNorth();
905 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
906 initialN2en.getX() - nextNodeEn.getX(),
907 initialN2en.getY() - nextNodeEn.getY()
908 ), initialN2en, nextNodeEn, false);
909 }
910
911 /**
912 * Calculate newN1en, newN2en best suitable for given mouse coordinates
913 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
914 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
915 * @param mouseEn mouse coordinates
916 * @return best movement vector
917 */
918 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
919 EastNorth bestMovement = calculateBestMovement(mouseEn);
920 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
921
922 // find out the movement distance, in metres
923 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
924 Main.getProjection().eastNorth2latlon(n1movedEn));
925 Main.map.statusLine.setDist(distance);
926 updateStatusLine();
927
928 if (dualAlignActive) {
929 // new positions of selected segment's nodes, without applying dual alignment
930 n1movedEn = initialN1en.add(bestMovement);
931 n2movedEn = initialN2en.add(bestMovement);
932
933 // calculate intersections of parallel shifted segment and the adjacent lines
934 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
935 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
936 if (newN1en == null || newN2en == null) return bestMovement;
937 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
938 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
939 dualAlignSegment2.p1, dualAlignSegment2.p2);
940 newN1en = collapsedSegmentPosition;
941 newN2en = collapsedSegmentPosition;
942 dualAlignSegmentCollapsed = true;
943 } else {
944 dualAlignSegmentCollapsed = false;
945 }
946 } else {
947 newN1en = n1movedEn;
948 newN2en = initialN2en.add(bestMovement);
949 }
950 return bestMovement;
951 }
952
953 /**
954 * Gets a node index from selected way before given index.
955 * @param index index of current node
956 * @return index of previous node or <code>-1</code> if there are no nodes there.
957 */
958 private int getPreviousNodeIndex(int index) {
959 if (index > 0)
960 return index - 1;
961 else if (selectedSegment.way.isClosed())
962 return selectedSegment.way.getNodesCount() - 2;
963 else
964 return -1;
965 }
966
967 /**
968 * Gets a node from selected way before given index.
969 * @param index index of current node
970 * @return previous node or <code>null</code> if there are no nodes there.
971 */
972 private Node getPreviousNode(int index) {
973 int indexPrev = getPreviousNodeIndex(index);
974 if (indexPrev >= 0)
975 return selectedSegment.way.getNode(indexPrev);
976 else
977 return null;
978 }
979
980
981 /**
982 * Gets a node index from selected way after given index.
983 * @param index index of current node
984 * @return index of next node or <code>-1</code> if there are no nodes there.
985 */
986 private int getNextNodeIndex(int index) {
987 int count = selectedSegment.way.getNodesCount();
988 if (index < count - 1)
989 return index + 1;
990 else if (selectedSegment.way.isClosed())
991 return 1;
992 else
993 return -1;
994 }
995
996 /**
997 * Gets a node from selected way after given index.
998 * @param index index of current node
999 * @return next node or <code>null</code> if there are no nodes there.
1000 */
1001 private Node getNextNode(int index) {
1002 int indexNext = getNextNodeIndex(index);
1003 if (indexNext >= 0)
1004 return selectedSegment.way.getNode(indexNext);
1005 else
1006 return null;
1007 }
1008
1009 // -------------------------------------------------------------------------
1010 // paint methods
1011 // -------------------------------------------------------------------------
1012
1013 @Override
1014 public void paint(Graphics2D g, MapView mv, Bounds box) {
1015 Graphics2D g2 = g;
1016 if (mode == Mode.select) {
1017 // Nothing to do
1018 } else {
1019 if (newN1en != null) {
1020
1021 Point p1 = mv.getPoint(initialN1en);
1022 Point p2 = mv.getPoint(initialN2en);
1023 Point p3 = mv.getPoint(newN1en);
1024 Point p4 = mv.getPoint(newN2en);
1025
1026 Point2D normalUnitVector = activeMoveDirection != null ? getNormalUniVector() : null;
1027
1028 if (mode == Mode.extrude || mode == Mode.create_new) {
1029 g2.setColor(mainColor);
1030 g2.setStroke(mainStroke);
1031 // Draw rectangle around new area.
1032 GeneralPath b = new GeneralPath();
1033 b.moveTo(p1.x, p1.y);
1034 b.lineTo(p3.x, p3.y);
1035 b.lineTo(p4.x, p4.y);
1036 b.lineTo(p2.x, p2.y);
1037 b.lineTo(p1.x, p1.y);
1038 g2.draw(b);
1039
1040 if (dualAlignActive) {
1041 // Draw reference ways
1042 drawReferenceSegment(g2, mv, dualAlignSegment1);
1043 drawReferenceSegment(g2, mv, dualAlignSegment2);
1044 } else if (activeMoveDirection != null && normalUnitVector != null) {
1045 // Draw reference way
1046 drawReferenceSegment(g2, mv, activeMoveDirection);
1047
1048 // Draw right angle marker on first node position, only when moving at right angle
1049 if (activeMoveDirection.perpendicular) {
1050 // mirror RightAngle marker, so it is inside the extrude
1051 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1052 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1053 double headingDiff = headingRefWS - headingMoveDir;
1054 if (headingDiff < 0)
1055 headingDiff += 2 * Math.PI;
1056 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1057 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1058 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1059 }
1060 }
1061 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1062 g2.setColor(mainColor);
1063 if (p1.distance(p2) < 3) {
1064 g2.setStroke(mainStroke);
1065 g2.drawOval((int) (p1.x-symbolSize/2), (int) (p1.y-symbolSize/2),
1066 (int) (symbolSize), (int) (symbolSize));
1067 } else {
1068 Line2D oldline = new Line2D.Double(p1, p2);
1069 g2.setStroke(oldLineStroke);
1070 g2.draw(oldline);
1071 }
1072
1073 if (dualAlignActive) {
1074 // Draw reference ways
1075 drawReferenceSegment(g2, mv, dualAlignSegment1);
1076 drawReferenceSegment(g2, mv, dualAlignSegment2);
1077 } else if (activeMoveDirection != null) {
1078
1079 g2.setColor(helperColor);
1080 g2.setStroke(helperStrokeDash);
1081 // Draw a guideline along the normal.
1082 Line2D normline;
1083 Point2D centerpoint = new Point2D.Double((p1.getX()+p2.getX())*0.5, (p1.getY()+p2.getY())*0.5);
1084 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1085 g2.draw(normline);
1086 // Draw right angle marker on initial position, only when moving at right angle
1087 if (activeMoveDirection.perpendicular) {
1088 // EastNorth units per pixel
1089 g2.setStroke(helperStrokeRA);
1090 g2.setColor(mainColor);
1091 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1092 }
1093 }
1094 }
1095 }
1096 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1097 }
1098 }
1099
1100 private Point2D getNormalUniVector() {
1101 double fac = 1.0 / activeMoveDirection.en.length();
1102 // mult by factor to get unit vector.
1103 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1104
1105 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1106 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1107 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1108 // If not, use a sign-flipped version of the normalUnitVector.
1109 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1110 }
1111
1112 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1113 //This is normally done by MapView.getPoint, but it does not work on vectors.
1114 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1115 return normalUnitVector;
1116 }
1117
1118 /**
1119 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1120 * @param from1 vector1 start
1121 * @param to1 vector1 end
1122 * @param from2 vector2 start
1123 * @param to2 vector2 end
1124 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1125 */
1126 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1127 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1128 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1129 }
1130
1131 /**
1132 * Draws right angle symbol at specified position.
1133 * @param g2 the Graphics2D object used to draw on
1134 * @param center center point of angle
1135 * @param normal vector of normal
1136 * @param mirror {@code true} if symbol should be mirrored by the normal
1137 */
1138 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1139 // EastNorth units per pixel
1140 double factor = 1.0/g2.getTransform().getScaleX();
1141 double raoffsetx = symbolSize*factor*normal.getX();
1142 double raoffsety = symbolSize*factor*normal.getY();
1143
1144 double cx = center.getX(), cy = center.getY();
1145 double k = mirror ? -1 : 1;
1146 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1147 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1148 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1149
1150 GeneralPath ra = new GeneralPath();
1151 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1152 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1153 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1154 g2.setStroke(helperStrokeRA);
1155 g2.draw(ra);
1156 }
1157
1158 /**
1159 * Draws given reference segment.
1160 * @param g2 the Graphics2D object used to draw on
1161 * @param mv map view
1162 * @param seg the reference segment
1163 */
1164 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1165 Point p1 = mv.getPoint(seg.p1);
1166 Point p2 = mv.getPoint(seg.p2);
1167 GeneralPath b = new GeneralPath();
1168 b.moveTo(p1.x, p1.y);
1169 b.lineTo(p2.x, p2.y);
1170 g2.setColor(helperColor);
1171 g2.setStroke(helperStrokeDash);
1172 g2.draw(b);
1173 }
1174
1175 /**
1176 * Creates a new Line that extends off the edge of the viewport in one direction
1177 * @param start The start point of the line
1178 * @param unitvector A unit vector denoting the direction of the line
1179 * @param g the Graphics2D object it will be used on
1180 * @return created line
1181 */
1182 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1183 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1184 try {
1185 AffineTransform invtrans = g.getTransform().createInverse();
1186 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1187 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1188
1189 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1190 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1191 // This can be used as a safe length of line to generate which will always go off-viewport.
1192 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1193 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1194
1195 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1196 + (unitvector.getY() * linelength)));
1197 } catch (NoninvertibleTransformException e) {
1198 Main.debug(e);
1199 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1200 + (unitvector.getY() * 10)));
1201 }
1202 }
1203}
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