source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 12346

Last change on this file since 12346 was 11893, checked in by Don-vip, 7 years ago

sonar - squid:S1126 - Return of boolean expressions should not be wrapped into an "if-then-else" statement
  • Property svn:eol-style set to native
File size: 50.2 KB
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.actions.mapmode;
3
4import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
5import static org.openstreetmap.josm.tools.I18n.marktr;
6import static org.openstreetmap.josm.tools.I18n.tr;
7
8import java.awt.BasicStroke;
9import java.awt.Color;
10import java.awt.Cursor;
11import java.awt.Graphics2D;
12import java.awt.Point;
13import java.awt.Rectangle;
14import java.awt.Stroke;
15import java.awt.event.ActionEvent;
16import java.awt.event.KeyEvent;
17import java.awt.event.MouseEvent;
18import java.awt.geom.AffineTransform;
19import java.awt.geom.GeneralPath;
20import java.awt.geom.Line2D;
21import java.awt.geom.NoninvertibleTransformException;
22import java.awt.geom.Point2D;
23import java.util.ArrayList;
24import java.util.Collection;
25import java.util.LinkedList;
26import java.util.List;
27
28import javax.swing.JCheckBoxMenuItem;
29import javax.swing.JMenuItem;
30
31import org.openstreetmap.josm.Main;
32import org.openstreetmap.josm.actions.JosmAction;
33import org.openstreetmap.josm.actions.MergeNodesAction;
34import org.openstreetmap.josm.command.AddCommand;
35import org.openstreetmap.josm.command.ChangeCommand;
36import org.openstreetmap.josm.command.Command;
37import org.openstreetmap.josm.command.MoveCommand;
38import org.openstreetmap.josm.command.SequenceCommand;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.coor.EastNorth;
41import org.openstreetmap.josm.data.osm.Node;
42import org.openstreetmap.josm.data.osm.OsmPrimitive;
43import org.openstreetmap.josm.data.osm.Way;
44import org.openstreetmap.josm.data.osm.WaySegment;
45import org.openstreetmap.josm.data.preferences.ColorProperty;
46import org.openstreetmap.josm.gui.MainMenu;
47import org.openstreetmap.josm.gui.MapView;
48import org.openstreetmap.josm.gui.draw.MapViewPath;
49import org.openstreetmap.josm.gui.draw.SymbolShape;
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 * @since 11713
212 */
213 public ExtrudeAction() {
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 ImageProvider.getCursor("normal", "rectangle"));
217 putValue("help", ht("/Action/Extrude"));
218 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
219 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
220 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
221
222 dualAlignEnabled = false;
223 dualAlignChangeAction = new DualAlignChangeAction();
224 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
225 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
226 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
227 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
228 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
229 readPreferences(); // to show prefernces in table before entering the mode
230 }
231
232 @Override
233 public void destroy() {
234 super.destroy();
235 dualAlignChangeAction.destroy();
236 }
237
238 private JCheckBoxMenuItem addDualAlignMenuItem() {
239 int n = Main.main.menu.editMenu.getItemCount();
240 for (int i = n-1; i > 0; i--) {
241 JMenuItem item = Main.main.menu.editMenu.getItem(i);
242 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
243 Main.main.menu.editMenu.remove(i);
244 }
245 }
246 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
247 }
248
249 // -------------------------------------------------------------------------
250 // Mode methods
251 // -------------------------------------------------------------------------
252
253 @Override
254 public String getModeHelpText() {
255 StringBuilder rv;
256 if (mode == Mode.select) {
257 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
258 "Alt-drag to create a new rectangle, double click to add a new node."));
259 if (dualAlignEnabled) {
260 rv.append(' ').append(tr("Dual alignment active."));
261 if (dualAlignSegmentCollapsed)
262 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
263 }
264 } else {
265 if (mode == Mode.translate)
266 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
267 else if (mode == Mode.translate_node)
268 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
269 else if (mode == Mode.extrude || mode == Mode.create_new)
270 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
271 else {
272 Main.warn("Extrude: unknown mode " + mode);
273 rv = new StringBuilder();
274 }
275 if (dualAlignActive) {
276 rv.append(' ').append(tr("Dual alignment active."));
277 if (dualAlignSegmentCollapsed) {
278 rv.append(' ').append(tr("Segment collapsed due to its direction reversing."));
279 }
280 }
281 }
282 return rv.toString();
283 }
284
285 @Override
286 public boolean layerIsSupported(Layer l) {
287 return l instanceof OsmDataLayer;
288 }
289
290 @Override
291 public void enterMode() {
292 super.enterMode();
293 Main.map.mapView.addMouseListener(this);
294 Main.map.mapView.addMouseMotionListener(this);
295 ignoreNextKeyRelease = true;
296 Main.map.keyDetector.addKeyListener(this);
297 Main.map.keyDetector.addModifierListener(this);
298 }
299
300 @Override
301 protected void readPreferences() {
302 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
303 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
304 mainColor = new ColorProperty(marktr("Extrude: main line"), Color.RED).get();
305 helperColor = new ColorProperty(marktr("Extrude: helper line"), Color.ORANGE).get();
306 helperStrokeDash = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.helper-line", "1 4"));
307 helperStrokeRA = new BasicStroke(1);
308 symbolSize = Main.pref.getDouble("extrude.angle-symbol-radius", 8);
309 nodeDragWithoutCtrl = Main.pref.getBoolean("extrude.drag-nodes-without-ctrl", false);
310 oldLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.ctrl.stroke.old-line", "1"));
311 mainStroke = GuiHelper.getCustomizedStroke(Main.pref.get("extrude.stroke.main", "3"));
312
313 ignoreSharedNodes = Main.pref.getBoolean("extrude.ignore-shared-nodes", true);
314 dualAlignCheckboxMenuItem.getAction().setEnabled(true);
315 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
316 keepSegmentDirection = Main.pref.getBoolean("extrude.dualalign.keep-segment-direction", true);
317 }
318
319 @Override
320 public void exitMode() {
321 Main.map.mapView.removeMouseListener(this);
322 Main.map.mapView.removeMouseMotionListener(this);
323 Main.map.mapView.removeTemporaryLayer(this);
324 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
325 Main.map.keyDetector.removeKeyListener(this);
326 Main.map.keyDetector.removeModifierListener(this);
327 super.exitMode();
328 }
329
330 // -------------------------------------------------------------------------
331 // Event handlers
332 // -------------------------------------------------------------------------
333
334 /**
335 * This method is called to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
336 */
337 @Override
338 public void modifiersChanged(int modifiers) {
339 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
340 return;
341 updateKeyModifiers(modifiers);
342 if (mode == Mode.select) {
343 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
344 }
345 }
346
347 @Override
348 public void doKeyPressed(KeyEvent e) {
349 // Do nothing
350 }
351
352 @Override
353 public void doKeyReleased(KeyEvent e) {
354 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
355 return;
356 if (ignoreNextKeyRelease) {
357 ignoreNextKeyRelease = false;
358 } else {
359 toggleDualAlign();
360 }
361 }
362
363 /**
364 * Toggles dual alignment mode.
365 */
366 private void toggleDualAlign() {
367 dualAlignEnabled = !dualAlignEnabled;
368 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
369 updateStatusLine();
370 }
371
372 /**
373 * If the left mouse button is pressed over a segment or a node, switches
374 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
375 * {@link #dualAlignEnabled}.
376 * @param e current mouse event
377 */
378 @Override
379 public void mousePressed(MouseEvent e) {
380 if (!Main.map.mapView.isActiveLayerVisible())
381 return;
382 if (!(Boolean) this.getValue("active"))
383 return;
384 if (e.getButton() != MouseEvent.BUTTON1)
385 return;
386
387 requestFocusInMapView();
388 updateKeyModifiers(e);
389
390 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive::isSelectable);
391 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
392
393 // If nothing gets caught, stay in select mode
394 if (selectedSegment == null && selectedNode == null) return;
395
396 if (selectedNode != null) {
397 if (ctrl || nodeDragWithoutCtrl) {
398 movingNodeList = new ArrayList<>();
399 movingNodeList.add(selectedNode);
400 calculatePossibleDirectionsByNode();
401 if (possibleMoveDirections.isEmpty()) {
402 // if no directions fould, do not enter dragging mode
403 return;
404 }
405 mode = Mode.translate_node;
406 dualAlignActive = false;
407 }
408 } else {
409 // Otherwise switch to another mode
410 if (dualAlignEnabled && checkDualAlignConditions()) {
411 dualAlignActive = true;
412 calculatePossibleDirectionsForDualAlign();
413 dualAlignSegmentCollapsed = false;
414 } else {
415 dualAlignActive = false;
416 calculatePossibleDirectionsBySegment();
417 }
418 if (ctrl) {
419 mode = Mode.translate;
420 movingNodeList = new ArrayList<>();
421 movingNodeList.add(selectedSegment.getFirstNode());
422 movingNodeList.add(selectedSegment.getSecondNode());
423 } else if (alt) {
424 mode = Mode.create_new;
425 // create a new segment and then select and extrude the new segment
426 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
427 alwaysCreateNodes = true;
428 } else {
429 mode = Mode.extrude;
430 getLayerManager().getEditDataSet().setSelected(selectedSegment.way);
431 alwaysCreateNodes = shift;
432 }
433 }
434
435 // Signifies that nothing has happened yet
436 newN1en = null;
437 newN2en = null;
438 moveCommand = null;
439 moveCommand2 = null;
440
441 Main.map.mapView.addTemporaryLayer(this);
442
443 updateStatusLine();
444 Main.map.mapView.repaint();
445
446 // Make note of time pressed
447 mouseDownTime = System.currentTimeMillis();
448
449 // Make note of mouse position
450 initialMousePos = e.getPoint();
451 }
452
453 /**
454 * Performs action depending on what {@link #mode} we're in.
455 * @param e current mouse event
456 */
457 @Override
458 public void mouseDragged(MouseEvent e) {
459 if (!Main.map.mapView.isActiveLayerVisible())
460 return;
461
462 // do not count anything as a drag if it lasts less than 100 milliseconds.
463 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
464 return;
465
466 if (mode == Mode.select) {
467 // Just sit tight and wait for mouse to be released.
468 } else {
469 //move, create new and extrude mode - move the selected segment
470
471 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
472 EastNorth bestMovement = calculateBestMovementAndNewNodes(mouseEn);
473
474 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
475
476 if (dualAlignActive) {
477 if (mode == Mode.extrude || mode == Mode.create_new) {
478 // nothing here
479 } else if (mode == Mode.translate) {
480 EastNorth movement1 = newN1en.subtract(initialN1en);
481 EastNorth movement2 = newN2en.subtract(initialN2en);
482 // move nodes to new position
483 if (moveCommand == null || moveCommand2 == null) {
484 // make a new move commands
485 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
486 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
487 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
488 Main.main.undoRedo.add(c);
489 } else {
490 // reuse existing move commands
491 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
492 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
493 }
494 }
495 } else if (bestMovement != null) {
496 if (mode == Mode.extrude || mode == Mode.create_new) {
497 //nothing here
498 } else if (mode == Mode.translate_node || mode == Mode.translate) {
499 //move nodes to new position
500 if (moveCommand == null) {
501 //make a new move command
502 moveCommand = new MoveCommand(new ArrayList<OsmPrimitive>(movingNodeList), bestMovement);
503 Main.main.undoRedo.add(moveCommand);
504 } else {
505 //reuse existing move command
506 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
507 }
508 }
509 }
510
511 Main.map.mapView.repaint();
512 }
513 }
514
515 /**
516 * Does anything that needs to be done, then switches back to select mode.
517 * @param e current mouse event
518 */
519 @Override
520 public void mouseReleased(MouseEvent e) {
521
522 if (!Main.map.mapView.isActiveLayerVisible())
523 return;
524
525 if (mode == Mode.select) {
526 // Nothing to be done
527 } else {
528 if (mode == Mode.create_new) {
529 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
530 createNewRectangle();
531 }
532 } else if (mode == Mode.extrude) {
533 if (e.getClickCount() == 2 && e.getPoint().equals(initialMousePos)) {
534 // double click adds a new node
535 addNewNode(e);
536 } else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
537 // main extrusion commands
538 performExtrusion();
539 }
540 } else if (mode == Mode.translate || mode == Mode.translate_node) {
541 //Commit translate
542 //the move command is already committed in mouseDragged
543 joinNodesIfCollapsed(movingNodeList);
544 }
545
546 updateKeyModifiers(e);
547 // Switch back into select mode
548 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
549 Main.map.mapView.removeTemporaryLayer(this);
550 selectedSegment = null;
551 moveCommand = null;
552 mode = Mode.select;
553 dualAlignSegmentCollapsed = false;
554 updateStatusLine();
555 Main.map.mapView.repaint();
556 }
557 }
558
559 // -------------------------------------------------------------------------
560 // Custom methods
561 // -------------------------------------------------------------------------
562
563 /**
564 * Inserts node into nearby segment.
565 * @param e current mouse point
566 */
567 private static void addNewNode(MouseEvent e) {
568 // Should maybe do the same as in DrawAction and fetch all nearby segments?
569 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive::isSelectable);
570 if (ws != null) {
571 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
572 EastNorth a = ws.getFirstNode().getEastNorth();
573 EastNorth b = ws.getSecondNode().getEastNorth();
574 n.setEastNorth(Geometry.closestPointToSegment(a, b, n.getEastNorth()));
575 Way wnew = new Way(ws.way);
576 wnew.addNode(ws.lowerIndex+1, n);
577 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
578 new AddCommand(n), new ChangeCommand(ws.way, wnew));
579 Main.main.undoRedo.add(cmds);
580 }
581 }
582
583 /**
584 * Creates a new way that shares segment with selected way.
585 */
586 private void createNewRectangle() {
587 if (selectedSegment == null) return;
588 // crete a new rectangle
589 Collection<Command> cmds = new LinkedList<>();
590 Node third = new Node(newN2en);
591 Node fourth = new Node(newN1en);
592 Way wnew = new Way();
593 wnew.addNode(selectedSegment.getFirstNode());
594 wnew.addNode(selectedSegment.getSecondNode());
595 wnew.addNode(third);
596 if (!dualAlignSegmentCollapsed) {
597 // rectangle can degrade to triangle for dual alignment after collapsing
598 wnew.addNode(fourth);
599 }
600 // ... and close the way
601 wnew.addNode(selectedSegment.getFirstNode());
602 // undo support
603 cmds.add(new AddCommand(third));
604 if (!dualAlignSegmentCollapsed) {
605 cmds.add(new AddCommand(fourth));
606 }
607 cmds.add(new AddCommand(wnew));
608 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
609 Main.main.undoRedo.add(c);
610 getLayerManager().getEditDataSet().setSelected(wnew);
611 }
612
613 /**
614 * Does actual extrusion of {@link #selectedSegment}.
615 * Uses {@link #initialN1en}, {@link #initialN2en} saved in calculatePossibleDirections* call
616 * Uses {@link #newN1en}, {@link #newN2en} calculated by {@link #calculateBestMovementAndNewNodes}
617 */
618 private void performExtrusion() {
619 // create extrusion
620 Collection<Command> cmds = new LinkedList<>();
621 Way wnew = new Way(selectedSegment.way);
622 boolean wayWasModified = false;
623 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
624 int insertionPoint = selectedSegment.lowerIndex + 1;
625
626 //find if the new points overlap existing segments (in case of 90 degree angles)
627 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
628 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
629 // segmentAngleZero marks subset of nodeOverlapsSegment.
630 // nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
631 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
632 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
633 List<Node> changedNodes = new ArrayList<>();
634 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
635 //move existing node
636 Node n1Old = selectedSegment.getFirstNode();
637 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
638 changedNodes.add(n1Old);
639 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
640 // replace shared node with new one
641 Node n1Old = selectedSegment.getFirstNode();
642 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
643 wnew.addNode(insertionPoint, n1New);
644 wnew.removeNode(n1Old);
645 wayWasModified = true;
646 cmds.add(new AddCommand(n1New));
647 changedNodes.add(n1New);
648 } else {
649 //introduce new node
650 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
651 wnew.addNode(insertionPoint, n1New);
652 wayWasModified = true;
653 insertionPoint++;
654 cmds.add(new AddCommand(n1New));
655 changedNodes.add(n1New);
656 }
657
658 //find if the new points overlap existing segments (in case of 90 degree angles)
659 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
660 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
661 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
662 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
663
664 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
665 //move existing node
666 Node n2Old = selectedSegment.getSecondNode();
667 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
668 changedNodes.add(n2Old);
669 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
670 // replace shared node with new one
671 Node n2Old = selectedSegment.getSecondNode();
672 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
673 wnew.addNode(insertionPoint, n2New);
674 wnew.removeNode(n2Old);
675 wayWasModified = true;
676 cmds.add(new AddCommand(n2New));
677 changedNodes.add(n2New);
678 } else {
679 //introduce new node
680 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
681 wnew.addNode(insertionPoint, n2New);
682 wayWasModified = true;
683 cmds.add(new AddCommand(n2New));
684 changedNodes.add(n2New);
685 }
686
687 //the way was a single segment, close the way
688 if (wayWasSingleSegment) {
689 wnew.addNode(selectedSegment.getFirstNode());
690 wayWasModified = true;
691 }
692 if (wayWasModified) {
693 // we only need to change the way if its node list was really modified
694 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
695 }
696 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
697 Main.main.undoRedo.add(c);
698 joinNodesIfCollapsed(changedNodes);
699 }
700
701 private void joinNodesIfCollapsed(List<Node> changedNodes) {
702 if (!dualAlignActive || newN1en == null || newN2en == null) return;
703 if (newN1en.distance(newN2en) > 1e-6) return;
704 // If the dual alignment moved two nodes to the same point, merge them
705 Node targetNode = MergeNodesAction.selectTargetNode(changedNodes);
706 Node locNode = MergeNodesAction.selectTargetLocationNode(changedNodes);
707 Command mergeCmd = MergeNodesAction.mergeNodes(Main.getLayerManager().getEditLayer(), changedNodes, targetNode, locNode);
708 if (mergeCmd != null) {
709 Main.main.undoRedo.add(mergeCmd);
710 } else {
711 // undo extruding command itself
712 Main.main.undoRedo.undo();
713 }
714 }
715
716 /**
717 * This method tests if {@code node} has other ways apart from the given one.
718 * @param node node to test
719 * @param myWay way known to contain this node
720 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
721 */
722 private static boolean hasNodeOtherWays(Node node, Way myWay) {
723 for (OsmPrimitive p : node.getReferrers()) {
724 if (p instanceof Way && p.isUsable() && p != myWay)
725 return true;
726 }
727 return false;
728 }
729
730 /**
731 * Determines best movement from {@link #initialMousePos} to current mouse position,
732 * choosing one of the directions from {@link #possibleMoveDirections}.
733 * @param mouseEn current mouse position
734 * @return movement vector
735 */
736 private EastNorth calculateBestMovement(EastNorth mouseEn) {
737
738 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
739 EastNorth mouseMovement = mouseEn.subtract(initialMouseEn);
740
741 double bestDistance = Double.POSITIVE_INFINITY;
742 EastNorth bestMovement = null;
743 activeMoveDirection = null;
744
745 //find the best movement direction and vector
746 for (ReferenceSegment direction : possibleMoveDirections) {
747 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
748 if (movement == null) {
749 //if direction parallel to segment.
750 continue;
751 }
752
753 double distanceFromMouseMovement = movement.distance(mouseMovement);
754 if (bestDistance > distanceFromMouseMovement) {
755 bestDistance = distanceFromMouseMovement;
756 activeMoveDirection = direction;
757 bestMovement = movement;
758 }
759 }
760 return bestMovement;
761 }
762
763 /***
764 * This method calculates offset amount by which to move the given segment
765 * perpendicularly for it to be in line with mouse position.
766 * @param segmentP1 segment's first point
767 * @param segmentP2 segment's second point
768 * @param moveDirection direction of movement
769 * @param targetPos mouse position
770 * @return offset amount of P1 and P2.
771 */
772 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
773 EastNorth targetPos) {
774 EastNorth intersectionPoint;
775 if (segmentP1.distanceSq(segmentP2) > 1e-7) {
776 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
777 } else {
778 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
779 }
780
781 if (intersectionPoint == null)
782 return null;
783 else
784 //return distance form base to target position
785 return targetPos.subtract(intersectionPoint);
786 }
787
788 /**
789 * Gathers possible move directions - perpendicular to the selected segment
790 * and parallel to neighboring segments.
791 */
792 private void calculatePossibleDirectionsBySegment() {
793 // remember initial positions for segment nodes.
794 initialN1en = selectedSegment.getFirstNode().getEastNorth();
795 initialN2en = selectedSegment.getSecondNode().getEastNorth();
796
797 //add direction perpendicular to the selected segment
798 possibleMoveDirections = new ArrayList<>();
799 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
800 initialN1en.getY() - initialN2en.getY(),
801 initialN2en.getX() - initialN1en.getX()
802 ), initialN1en, initialN2en, true));
803
804
805 //add directions parallel to neighbor segments
806 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
807 if (prevNode != null) {
808 EastNorth en = prevNode.getEastNorth();
809 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
810 initialN1en.getX() - en.getX(),
811 initialN1en.getY() - en.getY()
812 ), initialN1en, en, false));
813 }
814
815 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
816 if (nextNode != null) {
817 EastNorth en = nextNode.getEastNorth();
818 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
819 initialN2en.getX() - en.getX(),
820 initialN2en.getY() - en.getY()
821 ), initialN2en, en, false));
822 }
823 }
824
825 /**
826 * Gathers possible move directions - along all adjacent segments.
827 */
828 private void calculatePossibleDirectionsByNode() {
829 // remember initial positions for segment nodes.
830 initialN1en = selectedNode.getEastNorth();
831 initialN2en = initialN1en;
832 possibleMoveDirections = new ArrayList<>();
833 for (OsmPrimitive p: selectedNode.getReferrers()) {
834 if (p instanceof Way && p.isUsable()) {
835 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
836 EastNorth en = neighbor.getEastNorth();
837 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
838 initialN1en.getX() - en.getX(),
839 initialN1en.getY() - en.getY()
840 ), initialN1en, en, false));
841 }
842 }
843 }
844 }
845
846 /**
847 * Checks dual alignment conditions:
848 * 1. selected segment has both neighboring segments,
849 * 2. selected segment is not parallel with neighboring segments.
850 * @return {@code true} if dual alignment conditions are satisfied
851 */
852 private boolean checkDualAlignConditions() {
853 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
854 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
855 if (prevNode == null || nextNode == null) {
856 return false;
857 }
858
859 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
860 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
861 if (n1en.distance(prevNode.getEastNorth()) < 1e-4 ||
862 n2en.distance(nextNode.getEastNorth()) < 1e-4) {
863 return false;
864 }
865
866 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
867 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
868 return !prevSegmentParallel && !nextSegmentParallel;
869 }
870
871 /**
872 * Gathers possible move directions - perpendicular to the selected segment only.
873 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
874 */
875 private void calculatePossibleDirectionsForDualAlign() {
876 // remember initial positions for segment nodes.
877 initialN1en = selectedSegment.getFirstNode().getEastNorth();
878 initialN2en = selectedSegment.getSecondNode().getEastNorth();
879
880 // add direction perpendicular to the selected segment
881 possibleMoveDirections = new ArrayList<>();
882 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
883 initialN1en.getY() - initialN2en.getY(),
884 initialN2en.getX() - initialN1en.getX()
885 ), initialN1en, initialN2en, true));
886
887 // set neighboring segments
888 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
889 if (prevNode != null) {
890 EastNorth prevNodeEn = prevNode.getEastNorth();
891 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
892 initialN1en.getX() - prevNodeEn.getX(),
893 initialN1en.getY() - prevNodeEn.getY()
894 ), initialN1en, prevNodeEn, false);
895 }
896
897 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
898 if (nextNode != null) {
899 EastNorth nextNodeEn = nextNode.getEastNorth();
900 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
901 initialN2en.getX() - nextNodeEn.getX(),
902 initialN2en.getY() - nextNodeEn.getY()
903 ), initialN2en, nextNodeEn, false);
904 }
905 }
906
907 /**
908 * Calculate newN1en, newN2en best suitable for given mouse coordinates
909 * For dual align, calculates positions of new nodes, aligning them to neighboring segments.
910 * Elsewhere, just adds the vetor returned by calculateBestMovement to {@link #initialN1en}, {@link #initialN2en}.
911 * @param mouseEn mouse coordinates
912 * @return best movement vector
913 */
914 private EastNorth calculateBestMovementAndNewNodes(EastNorth mouseEn) {
915 EastNorth bestMovement = calculateBestMovement(mouseEn);
916 EastNorth n1movedEn = initialN1en.add(bestMovement), n2movedEn;
917
918 // find out the movement distance, in metres
919 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(
920 Main.getProjection().eastNorth2latlon(n1movedEn));
921 Main.map.statusLine.setDist(distance);
922 updateStatusLine();
923
924 if (dualAlignActive) {
925 // new positions of selected segment's nodes, without applying dual alignment
926 n1movedEn = initialN1en.add(bestMovement);
927 n2movedEn = initialN2en.add(bestMovement);
928
929 // calculate intersections of parallel shifted segment and the adjacent lines
930 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
931 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
932 if (newN1en == null || newN2en == null) return bestMovement;
933 if (keepSegmentDirection && isOppositeDirection(newN1en, newN2en, initialN1en, initialN2en)) {
934 EastNorth collapsedSegmentPosition = Geometry.getLineLineIntersection(dualAlignSegment1.p1, dualAlignSegment1.p2,
935 dualAlignSegment2.p1, dualAlignSegment2.p2);
936 newN1en = collapsedSegmentPosition;
937 newN2en = collapsedSegmentPosition;
938 dualAlignSegmentCollapsed = true;
939 } else {
940 dualAlignSegmentCollapsed = false;
941 }
942 } else {
943 newN1en = n1movedEn;
944 newN2en = initialN2en.add(bestMovement);
945 }
946 return bestMovement;
947 }
948
949 /**
950 * Gets a node index from selected way before given index.
951 * @param index index of current node
952 * @return index of previous node or <code>-1</code> if there are no nodes there.
953 */
954 private int getPreviousNodeIndex(int index) {
955 if (index > 0)
956 return index - 1;
957 else if (selectedSegment.way.isClosed())
958 return selectedSegment.way.getNodesCount() - 2;
959 else
960 return -1;
961 }
962
963 /**
964 * Gets a node from selected way before given index.
965 * @param index index of current node
966 * @return previous node or <code>null</code> if there are no nodes there.
967 */
968 private Node getPreviousNode(int index) {
969 int indexPrev = getPreviousNodeIndex(index);
970 if (indexPrev >= 0)
971 return selectedSegment.way.getNode(indexPrev);
972 else
973 return null;
974 }
975
976
977 /**
978 * Gets a node index from selected way after given index.
979 * @param index index of current node
980 * @return index of next node or <code>-1</code> if there are no nodes there.
981 */
982 private int getNextNodeIndex(int index) {
983 int count = selectedSegment.way.getNodesCount();
984 if (index < count - 1)
985 return index + 1;
986 else if (selectedSegment.way.isClosed())
987 return 1;
988 else
989 return -1;
990 }
991
992 /**
993 * Gets a node from selected way after given index.
994 * @param index index of current node
995 * @return next node or <code>null</code> if there are no nodes there.
996 */
997 private Node getNextNode(int index) {
998 int indexNext = getNextNodeIndex(index);
999 if (indexNext >= 0)
1000 return selectedSegment.way.getNode(indexNext);
1001 else
1002 return null;
1003 }
1004
1005 // -------------------------------------------------------------------------
1006 // paint methods
1007 // -------------------------------------------------------------------------
1008
1009 @Override
1010 public void paint(Graphics2D g, MapView mv, Bounds box) {
1011 Graphics2D g2 = g;
1012 if (mode == Mode.select) {
1013 // Nothing to do
1014 } else {
1015 if (newN1en != null) {
1016
1017 EastNorth p1 = initialN1en;
1018 EastNorth p2 = initialN2en;
1019 EastNorth p3 = newN1en;
1020 EastNorth p4 = newN2en;
1021
1022 Point2D normalUnitVector = activeMoveDirection != null ? getNormalUniVector() : null;
1023
1024 if (mode == Mode.extrude || mode == Mode.create_new) {
1025 g2.setColor(mainColor);
1026 g2.setStroke(mainStroke);
1027 // Draw rectangle around new area.
1028 MapViewPath b = new MapViewPath(mv);
1029 b.moveTo(p1);
1030 b.lineTo(p3);
1031 b.lineTo(p4);
1032 b.lineTo(p2);
1033 b.lineTo(p1);
1034 g2.draw(b);
1035
1036 if (dualAlignActive) {
1037 // Draw reference ways
1038 drawReferenceSegment(g2, mv, dualAlignSegment1);
1039 drawReferenceSegment(g2, mv, dualAlignSegment2);
1040 } else if (activeMoveDirection != null && normalUnitVector != null) {
1041 // Draw reference way
1042 drawReferenceSegment(g2, mv, activeMoveDirection);
1043
1044 // Draw right angle marker on first node position, only when moving at right angle
1045 if (activeMoveDirection.perpendicular) {
1046 // mirror RightAngle marker, so it is inside the extrude
1047 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1048 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1049 double headingDiff = headingRefWS - headingMoveDir;
1050 if (headingDiff < 0)
1051 headingDiff += 2 * Math.PI;
1052 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1053 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1054 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1055 }
1056 }
1057 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1058 g2.setColor(mainColor);
1059 if (p1.distance(p2) < 3) {
1060 g2.setStroke(mainStroke);
1061 g2.draw(new MapViewPath(mv).shapeAround(p1, SymbolShape.CIRCLE, symbolSize));
1062 } else {
1063 g2.setStroke(oldLineStroke);
1064 g2.draw(new MapViewPath(mv).moveTo(p1).lineTo(p2));
1065 }
1066
1067 if (dualAlignActive) {
1068 // Draw reference ways
1069 drawReferenceSegment(g2, mv, dualAlignSegment1);
1070 drawReferenceSegment(g2, mv, dualAlignSegment2);
1071 } else if (activeMoveDirection != null) {
1072
1073 g2.setColor(helperColor);
1074 g2.setStroke(helperStrokeDash);
1075 // Draw a guideline along the normal.
1076 Line2D normline;
1077 Point2D centerpoint = mv.getPoint2D(p1.interpolate(p2, .5));
1078 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1079 g2.draw(normline);
1080 // Draw right angle marker on initial position, only when moving at right angle
1081 if (activeMoveDirection.perpendicular) {
1082 // EastNorth units per pixel
1083 g2.setStroke(helperStrokeRA);
1084 g2.setColor(mainColor);
1085 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1086 }
1087 }
1088 }
1089 }
1090 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1091 }
1092 }
1093
1094 private Point2D getNormalUniVector() {
1095 double fac = 1.0 / activeMoveDirection.en.length();
1096 // mult by factor to get unit vector.
1097 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1098
1099 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1100 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1101 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1102 // If not, use a sign-flipped version of the normalUnitVector.
1103 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1104 }
1105
1106 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1107 //This is normally done by MapView.getPoint, but it does not work on vectors.
1108 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1109 return normalUnitVector;
1110 }
1111
1112 /**
1113 * Determines if from1-to1 and from2-to2 vectors directions are opposite
1114 * @param from1 vector1 start
1115 * @param to1 vector1 end
1116 * @param from2 vector2 start
1117 * @param to2 vector2 end
1118 * @return true if from1-to1 and from2-to2 vectors directions are opposite
1119 */
1120 private static boolean isOppositeDirection(EastNorth from1, EastNorth to1, EastNorth from2, EastNorth to2) {
1121 return (from1.getX()-to1.getX())*(from2.getX()-to2.getX())
1122 +(from1.getY()-to1.getY())*(from2.getY()-to2.getY()) < 0;
1123 }
1124
1125 /**
1126 * Draws right angle symbol at specified position.
1127 * @param g2 the Graphics2D object used to draw on
1128 * @param center center point of angle
1129 * @param normal vector of normal
1130 * @param mirror {@code true} if symbol should be mirrored by the normal
1131 */
1132 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1133 // EastNorth units per pixel
1134 double factor = 1.0/g2.getTransform().getScaleX();
1135 double raoffsetx = symbolSize*factor*normal.getX();
1136 double raoffsety = symbolSize*factor*normal.getY();
1137
1138 double cx = center.getX(), cy = center.getY();
1139 double k = mirror ? -1 : 1;
1140 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1141 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1142 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1143
1144 GeneralPath ra = new GeneralPath();
1145 ra.moveTo((float) ra1.getX(), (float) ra1.getY());
1146 ra.lineTo((float) ra2.getX(), (float) ra2.getY());
1147 ra.lineTo((float) ra3.getX(), (float) ra3.getY());
1148 g2.setStroke(helperStrokeRA);
1149 g2.draw(ra);
1150 }
1151
1152 /**
1153 * Draws given reference segment.
1154 * @param g2 the Graphics2D object used to draw on
1155 * @param mv map view
1156 * @param seg the reference segment
1157 */
1158 private void drawReferenceSegment(Graphics2D g2, MapView mv, ReferenceSegment seg) {
1159 g2.setColor(helperColor);
1160 g2.setStroke(helperStrokeDash);
1161 g2.draw(new MapViewPath(mv).moveTo(seg.p1).lineTo(seg.p2));
1162 }
1163
1164 /**
1165 * Creates a new Line that extends off the edge of the viewport in one direction
1166 * @param start The start point of the line
1167 * @param unitvector A unit vector denoting the direction of the line
1168 * @param g the Graphics2D object it will be used on
1169 * @return created line
1170 */
1171 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1172 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1173 try {
1174 AffineTransform invtrans = g.getTransform().createInverse();
1175 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width, 0), null);
1176 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0, bounds.height), null);
1177
1178 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1179 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1180 // This can be used as a safe length of line to generate which will always go off-viewport.
1181 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY())
1182 + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1183
1184 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength), start.getY()
1185 + (unitvector.getY() * linelength)));
1186 } catch (NoninvertibleTransformException e) {
1187 Main.debug(e);
1188 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10), start.getY()
1189 + (unitvector.getY() * 10)));
1190 }
1191 }
1192}
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