source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/ExtrudeAction.java@ 7216

Last change on this file since 7216 was 7216, checked in by akks, 10 years ago

Add Dual Align mode for extruder (patch by AlfonZ, see #7991)
  • Property svn:eol-style set to native
File size: 48.6 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.AWTEvent;
9import java.awt.BasicStroke;
10import java.awt.Color;
11import java.awt.Component;
12import java.awt.Cursor;
13import java.awt.Graphics2D;
14import java.awt.KeyboardFocusManager;
15import java.awt.Point;
16import java.awt.Rectangle;
17import java.awt.Stroke;
18import java.awt.Toolkit;
19import java.awt.event.AWTEventListener;
20import java.awt.event.ActionEvent;
21import java.awt.event.ActionListener;
22import java.awt.event.InputEvent;
23import java.awt.event.KeyEvent;
24import java.awt.event.MouseEvent;
25import java.awt.geom.AffineTransform;
26import java.awt.geom.GeneralPath;
27import java.awt.geom.Line2D;
28import java.awt.geom.NoninvertibleTransformException;
29import java.awt.geom.Point2D;
30import java.util.ArrayList;
31import java.util.Collection;
32import java.util.LinkedList;
33import java.util.List;
34import java.util.Set;
35import java.util.TreeSet;
36import javax.swing.JCheckBoxMenuItem;
37import javax.swing.JFrame;
38import javax.swing.JMenuItem;
39import javax.swing.SwingUtilities;
40import javax.swing.Timer;
41
42import org.openstreetmap.josm.Main;
43import org.openstreetmap.josm.actions.JosmAction;
44import org.openstreetmap.josm.command.AddCommand;
45import org.openstreetmap.josm.command.ChangeCommand;
46import org.openstreetmap.josm.command.Command;
47import org.openstreetmap.josm.command.MoveCommand;
48import org.openstreetmap.josm.command.SequenceCommand;
49import org.openstreetmap.josm.data.Bounds;
50import org.openstreetmap.josm.data.coor.EastNorth;
51import org.openstreetmap.josm.data.osm.Node;
52import org.openstreetmap.josm.data.osm.OsmPrimitive;
53import org.openstreetmap.josm.data.osm.Way;
54import org.openstreetmap.josm.data.osm.WaySegment;
55import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
56import org.openstreetmap.josm.gui.MainMenu;
57import org.openstreetmap.josm.gui.MapFrame;
58import org.openstreetmap.josm.gui.MapView;
59import org.openstreetmap.josm.gui.layer.Layer;
60import org.openstreetmap.josm.gui.layer.MapViewPaintable;
61import org.openstreetmap.josm.gui.layer.OsmDataLayer;
62import org.openstreetmap.josm.gui.util.GuiHelper;
63import org.openstreetmap.josm.tools.Geometry;
64import org.openstreetmap.josm.tools.ImageProvider;
65import org.openstreetmap.josm.tools.Shortcut;
66
67/**
68 * Makes a rectangle from a line, or modifies a rectangle.
69 */
70public class ExtrudeAction extends MapMode implements MapViewPaintable {
71
72 enum Mode { extrude, translate, select, create_new, translate_node }
73
74 private Mode mode = Mode.select;
75
76 /**
77 * If {@code true}, when extruding create new node(s) even if segments are parallel.
78 */
79 private boolean alwaysCreateNodes = false;
80 private boolean nodeDragWithoutCtrl;
81
82 private long mouseDownTime = 0;
83 private WaySegment selectedSegment = null;
84 private Node selectedNode = null;
85 private Color mainColor;
86 private Stroke mainStroke;
87
88 /** settings value whether shared nodes should be ignored or not */
89 private boolean ignoreSharedNodes;
90
91 /**
92 * drawing settings for helper lines
93 */
94 private Color helperColor;
95 private Stroke helperStrokeDash;
96 private Stroke helperStrokeRA;
97
98 private Stroke oldLineStroke;
99 private double symbolSize;
100 /**
101 * Possible directions to move to.
102 */
103 private List<ReferenceSegment> possibleMoveDirections;
104
105
106 /**
107 * Collection of nodes that is moved
108 */
109 private ArrayList<OsmPrimitive> movingNodeList;
110
111 /**
112 * The direction that is currently active.
113 */
114 private ReferenceSegment activeMoveDirection;
115
116 /**
117 * The position of the mouse cursor when the drag action was initiated.
118 */
119 private Point initialMousePos;
120 /**
121 * The time which needs to pass between click and release before something
122 * counts as a move, in milliseconds
123 */
124 private int initialMoveDelay = 200;
125 /**
126 * The minimal shift of mouse (in pixels) befire something counts as move
127 */
128 private int initialMoveThreshold = 1;
129
130 /**
131 * The initial EastNorths of node1 and node2
132 */
133 private EastNorth initialN1en;
134 private EastNorth initialN2en;
135 /**
136 * The new EastNorths of node1 and node2
137 */
138 private EastNorth newN1en;
139 private EastNorth newN2en;
140
141 /**
142 * the command that performed last move.
143 */
144 private MoveCommand moveCommand;
145 /**
146 * The command used for dual alignment movement.
147 * Needs to be separate, due to two nodes moving in different directions.
148 */
149 private MoveCommand moveCommand2;
150
151 /** The cursor for the 'create_new' mode. */
152 private final Cursor cursorCreateNew;
153
154 /** The cursor for the 'translate' mode. */
155 private final Cursor cursorTranslate;
156
157 /** The cursor for the 'alwaysCreateNodes' submode. */
158 private final Cursor cursorCreateNodes;
159
160 private static class ReferenceSegment {
161 public final EastNorth en;
162 public final EastNorth p1;
163 public final EastNorth p2;
164 public final boolean perpendicular;
165
166 public ReferenceSegment(EastNorth en, EastNorth p1, EastNorth p2, boolean perpendicular) {
167 this.en = en;
168 this.p1 = p1;
169 this.p2 = p2;
170 this.perpendicular = perpendicular;
171 }
172
173 @Override
174 public String toString() {
175 return "ReferenceSegment[en=" + en + ", p1=" + p1 + ", p2=" + p2 + ", perp=" + perpendicular + "]";
176 }
177 }
178
179 // Dual alignment mode stuff
180 /** {@code true}, if dual alignment mode is enabled. User wants following extrude to be dual aligned. */
181 private boolean dualAlignEnabled;
182 /** {@code true}, if dual alignment is active. User is dragging the mouse, required conditions are met. Treat {@link #mode} (extrude/translate/create_new) as dual aligned. */
183 private boolean dualAlignActive;
184 /** Dual alignment reference segments */
185 private ReferenceSegment dualAlignSegment1, dualAlignSegment2;
186 // Dual alignment UI stuff
187 private final DualAlignChangeAction dualAlignChangeAction;
188 private final JCheckBoxMenuItem dualAlignCheckboxMenuItem;
189 private final Shortcut dualAlignShortcut;
190 private boolean useRepeatedShortcut;
191
192 private class DualAlignChangeAction extends JosmAction {
193 public DualAlignChangeAction() {
194 super(tr("Dual alignment"), "mapmode/extrude/dualalign",
195 tr("Switch dual alignment mode while extruding"), null, false);
196 putValue("help", ht("/Action/Extrude#DualAlign"));
197 }
198
199 @Override
200 public void actionPerformed(ActionEvent e) {
201 toggleDualAlign();
202 }
203 }
204
205 /**
206 * Creates a new ExtrudeAction
207 * @param mapFrame The MapFrame this action belongs to.
208 */
209 public ExtrudeAction(MapFrame mapFrame) {
210 super(tr("Extrude"), "extrude/extrude", tr("Create areas"),
211 Shortcut.registerShortcut("mapmode:extrude", tr("Mode: {0}", tr("Extrude")), KeyEvent.VK_X, Shortcut.DIRECT),
212 mapFrame,
213 ImageProvider.getCursor("normal", "rectangle"));
214 putValue("help", ht("/Action/Extrude"));
215 cursorCreateNew = ImageProvider.getCursor("normal", "rectangle_plus");
216 cursorTranslate = ImageProvider.getCursor("normal", "rectangle_move");
217 cursorCreateNodes = ImageProvider.getCursor("normal", "rectangle_plussmall");
218
219 dualAlignEnabled = false;
220 dualAlignChangeAction = new DualAlignChangeAction();
221 dualAlignCheckboxMenuItem = addDualAlignMenuItem();
222 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
223 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
224 dualAlignShortcut = Shortcut.registerShortcut("mapmode:extrudedualalign",
225 tr("Mode: {0}", tr("Extrude Dual alignment")), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
226 useRepeatedShortcut = Main.pref.getBoolean("extrude.dualalign.toggleOnRepeatedX", true);
227 timer = new Timer(0, new ActionListener() {
228 @Override
229 public void actionPerformed(ActionEvent ae) {
230 timer.stop();
231 if (set.remove(releaseEvent.getKeyCode())) {
232 doKeyReleaseEvent(releaseEvent);
233 }
234 }
235 });
236 }
237
238 @Override
239 public void destroy() {
240 super.destroy();
241 dualAlignChangeAction.destroy();
242 }
243
244 private JCheckBoxMenuItem addDualAlignMenuItem() {
245 int n = Main.main.menu.editMenu.getItemCount();
246 for (int i = n-1; i>0; i--) {
247 JMenuItem item = Main.main.menu.editMenu.getItem(i);
248 if (item != null && item.getAction() != null && item.getAction() instanceof DualAlignChangeAction) {
249 Main.main.menu.editMenu.remove(i);
250 }
251 }
252 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, dualAlignChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
253 }
254
255 // -------------------------------------------------------------------------
256 // Mode methods
257 // -------------------------------------------------------------------------
258
259 @Override
260 public String getModeHelpText() {
261 StringBuilder rv;
262 if (mode == Mode.select) {
263 rv = new StringBuilder(tr("Drag a way segment to make a rectangle. Ctrl-drag to move a segment along its normal, " +
264 "Alt-drag to create a new rectangle, double click to add a new node."));
265 if (dualAlignEnabled)
266 rv.append(" ").append(tr("Dual alignment active."));
267 } else {
268 if (mode == Mode.translate)
269 rv = new StringBuilder(tr("Move a segment along its normal, then release the mouse button."));
270 else if (mode == Mode.translate_node)
271 rv = new StringBuilder(tr("Move the node along one of the segments, then release the mouse button."));
272 else if (mode == Mode.extrude)
273 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
274 else if (mode == Mode.create_new)
275 rv = new StringBuilder(tr("Draw a rectangle of the desired size, then release the mouse button."));
276 else {
277 Main.warn("Extrude: unknown mode " + mode);
278 rv = new StringBuilder();
279 }
280 if (dualAlignActive)
281 rv.append(" ").append(tr("Dual alignment active."));
282 }
283 return rv.toString();
284 }
285
286 @Override
287 public boolean layerIsSupported(Layer l) {
288 return l instanceof OsmDataLayer;
289 }
290
291 @Override
292 public void enterMode() {
293 super.enterMode();
294 Main.map.mapView.addMouseListener(this);
295 Main.map.mapView.addMouseMotionListener(this);
296 try {
297 Toolkit.getDefaultToolkit().addAWTEventListener(altKeyListener, AWTEvent.KEY_EVENT_MASK);
298 } catch (SecurityException ex) {
299 Main.warn(ex);
300 }
301 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay",200);
302 initialMoveThreshold = Main.pref.getInteger("extrude.initial-move-threshold", 1);
303 mainColor = Main.pref.getColor(marktr("Extrude: main line"), null);
304 if (mainColor == null) mainColor = PaintColors.SELECTED.get();
305 helperColor = Main.pref.getColor(marktr("Extrude: helper line"), Color.ORANGE);
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 }
316
317 @Override
318 public void exitMode() {
319 Main.map.mapView.removeMouseListener(this);
320 Main.map.mapView.removeMouseMotionListener(this);
321 Main.map.mapView.removeTemporaryLayer(this);
322 dualAlignCheckboxMenuItem.getAction().setEnabled(false);
323 try {
324 Toolkit.getDefaultToolkit().removeAWTEventListener(altKeyListener);
325 } catch (SecurityException ex) {
326 Main.warn(ex);
327 }
328 super.exitMode();
329 }
330
331 // -------------------------------------------------------------------------
332 // Event handlers
333 // -------------------------------------------------------------------------
334
335 /**
336 * This listener is used to indicate different modes via cursor when the Alt/Ctrl/Shift modifier is pressed,
337 * and for listening to dual alignment shortcuts.
338 */
339 private final AWTEventListener altKeyListener = new AWTEventListener() {
340 @Override
341 public void eventDispatched(AWTEvent e) {
342 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
343 return;
344 InputEvent ie = (InputEvent) e;
345 boolean alt = (ie.getModifiers() & (ActionEvent.ALT_MASK|InputEvent.ALT_GRAPH_MASK)) != 0;
346 boolean ctrl = (ie.getModifiers() & (ActionEvent.CTRL_MASK)) != 0;
347 boolean shift = (ie.getModifiers() & (ActionEvent.SHIFT_MASK)) != 0;
348 if (mode == Mode.select) {
349 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
350 }
351 if (e instanceof KeyEvent) {
352 KeyEvent ke = (KeyEvent) e;
353 if (dualAlignShortcut.isEvent(ke) || (useRepeatedShortcut && getShortcut().isEvent(ke))) {
354 Component focused = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
355 if (SwingUtilities.getWindowAncestor(focused) instanceof JFrame) {
356 processKeyEvent(ke);
357 }
358 }
359 }
360 }
361 };
362
363 // events for crossplatform key holding processing
364 // thanks to http://www.arco.in-berlin.de/keyevent.html
365 private final Set<Integer> set = new TreeSet<Integer>();
366 private KeyEvent releaseEvent;
367 private Timer timer;
368 private void processKeyEvent(KeyEvent e) {
369 if (!dualAlignShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
370 return;
371
372 if (e.getID() == KeyEvent.KEY_PRESSED) {
373 if (timer.isRunning()) {
374 timer.stop();
375 } else if (set.add((e.getKeyCode()))) {
376 doKeyPressEvent(e);
377 }
378 } else if (e.getID() == KeyEvent.KEY_RELEASED) {
379 if (timer.isRunning()) {
380 timer.stop();
381 if (set.remove(e.getKeyCode())) {
382 doKeyReleaseEvent(e);
383 }
384 } else {
385 releaseEvent = e;
386 timer.restart();
387 }
388 }
389 }
390
391 private void doKeyPressEvent(KeyEvent e) {
392 }
393
394 private void doKeyReleaseEvent(KeyEvent e) {
395 toggleDualAlign();
396 }
397
398 /**
399 * Toggles dual alignment mode.
400 */
401 private void toggleDualAlign() {
402 dualAlignEnabled = !dualAlignEnabled;
403 dualAlignCheckboxMenuItem.setState(dualAlignEnabled);
404 updateStatusLine();
405 }
406
407 /**
408 * If the left mouse button is pressed over a segment or a node, switches
409 * to appropriate {@link #mode}, depending on Ctrl/Alt/Shift modifiers and
410 * {@link #dualAlignEnabled}.
411 * @param e
412 */
413 @Override
414 public void mousePressed(MouseEvent e) {
415 if(!Main.map.mapView.isActiveLayerVisible())
416 return;
417 if (!(Boolean)this.getValue("active"))
418 return;
419 if (e.getButton() != MouseEvent.BUTTON1)
420 return;
421
422 requestFocusInMapView();
423 updateKeyModifiers(e);
424
425 selectedNode = Main.map.mapView.getNearestNode(e.getPoint(), OsmPrimitive.isSelectablePredicate);
426 selectedSegment = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate);
427
428 // If nothing gets caught, stay in select mode
429 if (selectedSegment == null && selectedNode == null) return;
430
431 if (selectedNode != null) {
432 if (ctrl || nodeDragWithoutCtrl) {
433 movingNodeList = new ArrayList<>();
434 movingNodeList.add(selectedNode);
435 calculatePossibleDirectionsByNode();
436 if (possibleMoveDirections.isEmpty()) {
437 // if no directions fould, do not enter dragging mode
438 return;
439 }
440 mode = Mode.translate_node;
441 dualAlignActive = false;
442 }
443 } else {
444 // Otherwise switch to another mode
445 if (dualAlignEnabled && checkDualAlignConditions()) {
446 dualAlignActive = true;
447 calculatePossibleDirectionsForDualAlign();
448 } else {
449 dualAlignActive = false;
450 calculatePossibleDirectionsBySegment();
451 }
452 if (ctrl) {
453 mode = Mode.translate;
454 movingNodeList = new ArrayList<>();
455 movingNodeList.add(selectedSegment.getFirstNode());
456 movingNodeList.add(selectedSegment.getSecondNode());
457 } else if (alt) {
458 mode = Mode.create_new;
459 // create a new segment and then select and extrude the new segment
460 getCurrentDataSet().setSelected(selectedSegment.way);
461 alwaysCreateNodes = true;
462 } else {
463 mode = Mode.extrude;
464 getCurrentDataSet().setSelected(selectedSegment.way);
465 alwaysCreateNodes = shift;
466 }
467 }
468
469 // Signifies that nothing has happened yet
470 newN1en = null;
471 newN2en = null;
472 moveCommand = null;
473 moveCommand2 = null;
474
475 Main.map.mapView.addTemporaryLayer(this);
476
477 updateStatusLine();
478 Main.map.mapView.repaint();
479
480 // Make note of time pressed
481 mouseDownTime = System.currentTimeMillis();
482
483 // Make note of mouse position
484 initialMousePos = e.getPoint();
485 }
486
487 /**
488 * Performs action depending on what {@link #mode} we're in.
489 * @param e
490 */
491 @Override
492 public void mouseDragged(MouseEvent e) {
493 if(!Main.map.mapView.isActiveLayerVisible())
494 return;
495
496 // do not count anything as a drag if it lasts less than 100 milliseconds.
497 if (System.currentTimeMillis() - mouseDownTime < initialMoveDelay)
498 return;
499
500 if (mode == Mode.select) {
501 // Just sit tight and wait for mouse to be released.
502 } else {
503 //move, create new and extrude mode - move the selected segment
504
505 EastNorth mouseEn = Main.map.mapView.getEastNorth(e.getPoint().x, e.getPoint().y);
506 EastNorth bestMovement = calculateBestMovement(mouseEn);
507 EastNorth n1movedEn = new EastNorth(initialN1en.getX() + bestMovement.getX(), initialN1en.getY() + bestMovement.getY());
508
509 // find out the movement distance, in metres
510 double distance = Main.getProjection().eastNorth2latlon(initialN1en).greatCircleDistance(Main.getProjection().eastNorth2latlon(n1movedEn));
511 Main.map.statusLine.setDist(distance);
512 updateStatusLine();
513
514 Main.map.mapView.setNewCursor(Cursor.MOVE_CURSOR, this);
515
516 if (dualAlignActive) {
517 calculateDualAlignNodesPositions(bestMovement);
518
519 if (mode == Mode.extrude || mode == Mode.create_new) {
520 // nothing here
521 } else if (mode == Mode.translate) {
522 EastNorth movement1 = initialN1en.sub(newN1en);
523 EastNorth movement2 = initialN2en.sub(newN2en);
524 // move nodes to new position
525 if (moveCommand == null || moveCommand2 == null) {
526 // make a new move commands
527 moveCommand = new MoveCommand(movingNodeList.get(0), movement1.getX(), movement1.getY());
528 moveCommand2 = new MoveCommand(movingNodeList.get(1), movement2.getX(), movement2.getY());
529 Command c = new SequenceCommand(tr("Extrude Way"), moveCommand, moveCommand2);
530 Main.main.undoRedo.add(c);
531 } else {
532 // reuse existing move commands
533 moveCommand.moveAgainTo(movement1.getX(), movement1.getY());
534 moveCommand2.moveAgainTo(movement2.getX(), movement2.getY());
535 }
536 }
537 } else {
538 newN1en = n1movedEn;
539 newN2en = new EastNorth(initialN2en.getX() + bestMovement.getX(), initialN2en.getY() + bestMovement.getY());
540
541 if (mode == Mode.extrude || mode == Mode.create_new) {
542 //nothing here
543 } else if (mode == Mode.translate_node || mode == Mode.translate) {
544 //move nodes to new position
545 if (moveCommand == null) {
546 //make a new move command
547 moveCommand = new MoveCommand(movingNodeList, bestMovement.getX(), bestMovement.getY());
548 Main.main.undoRedo.add(moveCommand);
549 } else {
550 //reuse existing move command
551 moveCommand.moveAgainTo(bestMovement.getX(), bestMovement.getY());
552 }
553 }
554 }
555
556 Main.map.mapView.repaint();
557 }
558 }
559
560 /**
561 * Does anything that needs to be done, then switches back to select mode.
562 * @param e
563 */
564 @Override
565 public void mouseReleased(MouseEvent e) {
566
567 if(!Main.map.mapView.isActiveLayerVisible())
568 return;
569
570 if (mode == Mode.select) {
571 // Nothing to be done
572 } else {
573 if (mode == Mode.create_new) {
574 if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null) {
575 createNewRectangle();
576 }
577 } else if (mode == Mode.extrude) {
578 if( e.getClickCount() == 2 && e.getPoint().equals(initialMousePos) ) {
579 // double click adds a new node
580 addNewNode(e);
581 }
582 else if (e.getPoint().distance(initialMousePos) > initialMoveThreshold && newN1en != null && selectedSegment != null) {
583 // main extrusion commands
584 performExtrusion();
585 }
586 } else if (mode == Mode.translate || mode == Mode.translate_node) {
587 //Commit translate
588 //the move command is already committed in mouseDragged
589 }
590
591 updateKeyModifiers(e);
592 // Switch back into select mode
593 Main.map.mapView.setNewCursor(ctrl ? cursorTranslate : alt ? cursorCreateNew : shift ? cursorCreateNodes : cursor, this);
594 Main.map.mapView.removeTemporaryLayer(this);
595 selectedSegment = null;
596 moveCommand = null;
597 mode = Mode.select;
598
599 updateStatusLine();
600 Main.map.mapView.repaint();
601 }
602 }
603
604 // -------------------------------------------------------------------------
605 // Custom methods
606 // -------------------------------------------------------------------------
607
608 /**
609 * Inserts node into nearby segment.
610 * @param e current mouse point
611 */
612 private void addNewNode(MouseEvent e) {
613 // Should maybe do the same as in DrawAction and fetch all nearby segments?
614 WaySegment ws = Main.map.mapView.getNearestWaySegment(e.getPoint(), OsmPrimitive.isSelectablePredicate);
615 if (ws != null) {
616 Node n = new Node(Main.map.mapView.getLatLon(e.getX(), e.getY()));
617 EastNorth A = ws.getFirstNode().getEastNorth();
618 EastNorth B = ws.getSecondNode().getEastNorth();
619 n.setEastNorth(Geometry.closestPointToSegment(A, B, n.getEastNorth()));
620 Way wnew = new Way(ws.way);
621 wnew.addNode(ws.lowerIndex+1, n);
622 SequenceCommand cmds = new SequenceCommand(tr("Add a new node to an existing way"),
623 new AddCommand(n), new ChangeCommand(ws.way, wnew));
624 Main.main.undoRedo.add(cmds);
625 }
626 }
627
628 /**
629 * Creates a new way that shares segment with selected way.
630 */
631 private void createNewRectangle() {
632 if (selectedSegment == null) return;
633 // crete a new rectangle
634 Collection<Command> cmds = new LinkedList<>();
635 Node third = new Node(newN2en);
636 Node fourth = new Node(newN1en);
637 Way wnew = new Way();
638 wnew.addNode(selectedSegment.getFirstNode());
639 wnew.addNode(selectedSegment.getSecondNode());
640 wnew.addNode(third);
641 wnew.addNode(fourth);
642 // ... and close the way
643 wnew.addNode(selectedSegment.getFirstNode());
644 // undo support
645 cmds.add(new AddCommand(third));
646 cmds.add(new AddCommand(fourth));
647 cmds.add(new AddCommand(wnew));
648 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
649 Main.main.undoRedo.add(c);
650 getCurrentDataSet().setSelected(wnew);
651 }
652
653 /**
654 * Does actual extrusion of {@link #selectedSegment}.
655 */
656 private void performExtrusion() {
657 // create extrusion
658 Collection<Command> cmds = new LinkedList<>();
659 Way wnew = new Way(selectedSegment.way);
660 boolean wayWasModified = false;
661 boolean wayWasSingleSegment = wnew.getNodesCount() == 2;
662 int insertionPoint = selectedSegment.lowerIndex + 1;
663
664 //find if the new points overlap existing segments (in case of 90 degree angles)
665 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
666 boolean nodeOverlapsSegment = prevNode != null && Geometry.segmentsParallel(initialN1en, prevNode.getEastNorth(), initialN1en, newN1en);
667 // segmentAngleZero marks subset of nodeOverlapsSegment. nodeOverlapsSegment is true if angle between segments is 0 or PI, segmentAngleZero only if angle is 0
668 boolean segmentAngleZero = prevNode != null && Math.abs(Geometry.getCornerAngle(prevNode.getEastNorth(), initialN1en, newN1en)) < 1e-5;
669 boolean hasOtherWays = hasNodeOtherWays(selectedSegment.getFirstNode(), selectedSegment.way);
670
671 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
672 //move existing node
673 Node n1Old = selectedSegment.getFirstNode();
674 cmds.add(new MoveCommand(n1Old, Main.getProjection().eastNorth2latlon(newN1en)));
675 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
676 // replace shared node with new one
677 Node n1Old = selectedSegment.getFirstNode();
678 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
679 wnew.addNode(insertionPoint, n1New);
680 wnew.removeNode(n1Old);
681 wayWasModified = true;
682 cmds.add(new AddCommand(n1New));
683 } else {
684 //introduce new node
685 Node n1New = new Node(Main.getProjection().eastNorth2latlon(newN1en));
686 wnew.addNode(insertionPoint, n1New);
687 wayWasModified = true;
688 insertionPoint ++;
689 cmds.add(new AddCommand(n1New));
690 }
691
692 //find if the new points overlap existing segments (in case of 90 degree angles)
693 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
694 nodeOverlapsSegment = nextNode != null && Geometry.segmentsParallel(initialN2en, nextNode.getEastNorth(), initialN2en, newN2en);
695 segmentAngleZero = nextNode != null && Math.abs(Geometry.getCornerAngle(nextNode.getEastNorth(), initialN2en, newN2en)) < 1e-5;
696 hasOtherWays = hasNodeOtherWays(selectedSegment.getSecondNode(), selectedSegment.way);
697
698 if (nodeOverlapsSegment && !alwaysCreateNodes && !hasOtherWays) {
699 //move existing node
700 Node n2Old = selectedSegment.getSecondNode();
701 cmds.add(new MoveCommand(n2Old, Main.getProjection().eastNorth2latlon(newN2en)));
702 } else if (ignoreSharedNodes && segmentAngleZero && !alwaysCreateNodes && hasOtherWays) {
703 // replace shared node with new one
704 Node n2Old = selectedSegment.getSecondNode();
705 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
706 wnew.addNode(insertionPoint, n2New);
707 wnew.removeNode(n2Old);
708 wayWasModified = true;
709 cmds.add(new AddCommand(n2New));
710 } else {
711 //introduce new node
712 Node n2New = new Node(Main.getProjection().eastNorth2latlon(newN2en));
713 wnew.addNode(insertionPoint, n2New);
714 wayWasModified = true;
715 insertionPoint ++;
716 cmds.add(new AddCommand(n2New));
717 }
718
719 //the way was a single segment, close the way
720 if (wayWasSingleSegment) {
721 wnew.addNode(selectedSegment.getFirstNode());
722 wayWasModified = true;
723 }
724 if (wayWasModified) {
725 // we only need to change the way if its node list was really modified
726 cmds.add(new ChangeCommand(selectedSegment.way, wnew));
727 }
728 Command c = new SequenceCommand(tr("Extrude Way"), cmds);
729 Main.main.undoRedo.add(c);
730 }
731
732 /**
733 * This method tests if {@code node} has other ways apart from the given one.
734 * @param node
735 * @param myWay
736 * @return {@code true} if {@code node} belongs only to {@code myWay}, false if there are more ways.
737 */
738 private static boolean hasNodeOtherWays(Node node, Way myWay) {
739 for (OsmPrimitive p : node.getReferrers()) {
740 if (p instanceof Way && p.isUsable() && p != myWay)
741 return true;
742 }
743 return false;
744 }
745
746 /**
747 * Determines best movement from {@link #initialMousePos} to current mouse position,
748 * choosing one of the directions from {@link #possibleMoveDirections}.
749 * @param mouseEn current mouse position
750 * @return movement vector
751 */
752 private EastNorth calculateBestMovement(EastNorth mouseEn) {
753
754 EastNorth initialMouseEn = Main.map.mapView.getEastNorth(initialMousePos.x, initialMousePos.y);
755 EastNorth mouseMovement = initialMouseEn.sub(mouseEn);
756
757 double bestDistance = Double.POSITIVE_INFINITY;
758 EastNorth bestMovement = null;
759 activeMoveDirection = null;
760
761 //find the best movement direction and vector
762 for (ReferenceSegment direction : possibleMoveDirections) {
763 EastNorth movement = calculateSegmentOffset(initialN1en, initialN2en, direction.en, mouseEn);
764 if (movement == null) {
765 //if direction parallel to segment.
766 continue;
767 }
768
769 double distanceFromMouseMovement = movement.distance(mouseMovement);
770 if (bestDistance > distanceFromMouseMovement) {
771 bestDistance = distanceFromMouseMovement;
772 activeMoveDirection = direction;
773 bestMovement = movement;
774 }
775 }
776 return bestMovement;
777
778
779 }
780
781 /***
782 * This method calculates offset amount by which to move the given segment
783 * perpendicularly for it to be in line with mouse position.
784 * @param segmentP1 segment's first point
785 * @param segmentP2 segment's second point
786 * @param moveDirection direction of movement
787 * @param targetPos mouse position
788 * @return offset amount of P1 and P2.
789 */
790 private static EastNorth calculateSegmentOffset(EastNorth segmentP1, EastNorth segmentP2, EastNorth moveDirection,
791 EastNorth targetPos) {
792 EastNorth intersectionPoint;
793 if (segmentP1.distanceSq(segmentP2)>1e-7) {
794 intersectionPoint = Geometry.getLineLineIntersection(segmentP1, segmentP2, targetPos, targetPos.add(moveDirection));
795 } else {
796 intersectionPoint = Geometry.closestPointToLine(targetPos, targetPos.add(moveDirection), segmentP1);
797 }
798
799 if (intersectionPoint == null)
800 return null;
801 else
802 //return distance form base to target position
803 return intersectionPoint.sub(targetPos);
804 }
805
806 /**
807 * Gathers possible move directions - perpendicular to the selected segment
808 * and parallel to neighboring segments.
809 */
810 private void calculatePossibleDirectionsBySegment() {
811 // remember initial positions for segment nodes.
812 initialN1en = selectedSegment.getFirstNode().getEastNorth();
813 initialN2en = selectedSegment.getSecondNode().getEastNorth();
814
815 //add direction perpendicular to the selected segment
816 possibleMoveDirections = new ArrayList<>();
817 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
818 initialN1en.getY() - initialN2en.getY(),
819 initialN2en.getX() - initialN1en.getX()
820 ), initialN1en, initialN2en, true));
821
822
823 //add directions parallel to neighbor segments
824 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
825 if (prevNode != null) {
826 EastNorth en = prevNode.getEastNorth();
827 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
828 initialN1en.getX() - en.getX(),
829 initialN1en.getY() - en.getY()
830 ), initialN1en, en, false));
831 }
832
833 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
834 if (nextNode != null) {
835 EastNorth en = nextNode.getEastNorth();
836 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
837 initialN2en.getX() - en.getX(),
838 initialN2en.getY() - en.getY()
839 ), initialN2en, en, false));
840 }
841 }
842
843 /**
844 * Gathers possible move directions - along all adjacent segments.
845 */
846 private void calculatePossibleDirectionsByNode() {
847 // remember initial positions for segment nodes.
848 initialN1en = selectedNode.getEastNorth();
849 initialN2en = initialN1en;
850 possibleMoveDirections = new ArrayList<>();
851 for (OsmPrimitive p: selectedNode.getReferrers()) {
852 if (p instanceof Way && p.isUsable()) {
853 for (Node neighbor: ((Way) p).getNeighbours(selectedNode)) {
854 EastNorth en = neighbor.getEastNorth();
855 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
856 initialN1en.getX() - en.getX(),
857 initialN1en.getY() - en.getY()
858 ), initialN1en, en, false));
859 }
860 }
861 }
862 }
863
864 /**
865 * Checks dual alignment conditions:
866 * 1. selected segment has both neighboring segments,
867 * 2. selected segment is not parallel with neighboring segments.
868 * @return {@code true} if dual alignment conditions are satisfied
869 */
870 private boolean checkDualAlignConditions() {
871 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
872 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
873 if (prevNode == null || nextNode == null) {
874 return false;
875 }
876
877 EastNorth n1en = selectedSegment.getFirstNode().getEastNorth();
878 EastNorth n2en = selectedSegment.getSecondNode().getEastNorth();
879 boolean prevSegmentParallel = Geometry.segmentsParallel(n1en, prevNode.getEastNorth(), n1en, n2en);
880 boolean nextSegmentParallel = Geometry.segmentsParallel(n2en, nextNode.getEastNorth(), n1en, n2en);
881 if (prevSegmentParallel || nextSegmentParallel) {
882 return false;
883 }
884
885 return true;
886 }
887
888 /**
889 * Gathers possible move directions - perpendicular to the selected segment only.
890 * Neighboring segments go to {@link #dualAlignSegment1} and {@link #dualAlignSegment2}.
891 */
892 private void calculatePossibleDirectionsForDualAlign() {
893 // remember initial positions for segment nodes.
894 initialN1en = selectedSegment.getFirstNode().getEastNorth();
895 initialN2en = selectedSegment.getSecondNode().getEastNorth();
896
897 // add direction perpendicular to the selected segment
898 possibleMoveDirections = new ArrayList<ReferenceSegment>();
899 possibleMoveDirections.add(new ReferenceSegment(new EastNorth(
900 initialN1en.getY() - initialN2en.getY(),
901 initialN2en.getX() - initialN1en.getX()
902 ), initialN1en, initialN2en, true));
903
904 // set neighboring segments
905 Node prevNode = getPreviousNode(selectedSegment.lowerIndex);
906 EastNorth prevNodeEn = prevNode.getEastNorth();
907 dualAlignSegment1 = new ReferenceSegment(new EastNorth(
908 initialN1en.getX() - prevNodeEn.getX(),
909 initialN1en.getY() - prevNodeEn.getY()
910 ), initialN1en, prevNodeEn, false);
911
912 Node nextNode = getNextNode(selectedSegment.lowerIndex + 1);
913 EastNorth nextNodeEn = nextNode.getEastNorth();
914 dualAlignSegment2 = new ReferenceSegment(new EastNorth(
915 initialN2en.getX() - nextNodeEn.getX(),
916 initialN2en.getY() - nextNodeEn.getY()
917 ), initialN2en, nextNodeEn, false);
918 }
919
920 /**
921 * Calculates positions of new nodes, aligning them to neighboring segments.
922 * @param movement movement to be used
923 */
924 private void calculateDualAlignNodesPositions(EastNorth movement) {
925 // new positions of selected segment's nodes, without applying dual alignment
926 EastNorth n1movedEn = new EastNorth(initialN1en.getX() + movement.getX(), initialN1en.getY() + movement.getY());
927 EastNorth n2movedEn = new EastNorth(initialN2en.getX() + movement.getX(), initialN2en.getY() + movement.getY());
928
929 // calculate intersections
930 newN1en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment1.p1, dualAlignSegment1.p2);
931 newN2en = Geometry.getLineLineIntersection(n1movedEn, n2movedEn, dualAlignSegment2.p1, dualAlignSegment2.p2);
932 }
933
934 /**
935 * Gets a node index from selected way before given index.
936 * @param index index of current node
937 * @return index of previous node or <code>-1</code> if there are no nodes there.
938 */
939 private int getPreviousNodeIndex(int index) {
940 if (index > 0)
941 return index - 1;
942 else if (selectedSegment.way.isClosed())
943 return selectedSegment.way.getNodesCount() - 2;
944 else
945 return -1;
946 }
947
948 /**
949 * Gets a node from selected way before given index.
950 * @param index index of current node
951 * @return previous node or <code>null</code> if there are no nodes there.
952 */
953 private Node getPreviousNode(int index) {
954 int indexPrev = getPreviousNodeIndex(index);
955 if (indexPrev >= 0)
956 return selectedSegment.way.getNode(indexPrev);
957 else
958 return null;
959 }
960
961
962 /**
963 * Gets a node index from selected way after given index.
964 * @param index index of current node
965 * @return index of next node or <code>-1</code> if there are no nodes there.
966 */
967 private int getNextNodeIndex(int index) {
968 int count = selectedSegment.way.getNodesCount();
969 if (index < count - 1)
970 return index + 1;
971 else if (selectedSegment.way.isClosed())
972 return 1;
973 else
974 return -1;
975 }
976
977 /**
978 * Gets a node from selected way after given index.
979 * @param index index of current node
980 * @return next node or <code>null</code> if there are no nodes there.
981 */
982 private Node getNextNode(int index) {
983 int indexNext = getNextNodeIndex(index);
984 if (indexNext >= 0)
985 return selectedSegment.way.getNode(indexNext);
986 else
987 return null;
988 }
989
990 // -------------------------------------------------------------------------
991 // paint methods
992 // -------------------------------------------------------------------------
993
994 @Override
995 public void paint(Graphics2D g, MapView mv, Bounds box) {
996 Graphics2D g2 = g;
997 if (mode == Mode.select) {
998 // Nothing to do
999 } else {
1000 if (newN1en != null) {
1001
1002 Point p1 = mv.getPoint(initialN1en);
1003 Point p2 = mv.getPoint(initialN2en);
1004 Point p3 = mv.getPoint(newN1en);
1005 Point p4 = mv.getPoint(newN2en);
1006
1007 Point2D normalUnitVector = getNormalUniVector();
1008
1009 if (mode == Mode.extrude || mode == Mode.create_new) {
1010 g2.setColor(mainColor);
1011 g2.setStroke(mainStroke);
1012 // Draw rectangle around new area.
1013 GeneralPath b = new GeneralPath();
1014 b.moveTo(p1.x, p1.y); b.lineTo(p3.x, p3.y);
1015 b.lineTo(p4.x, p4.y); b.lineTo(p2.x, p2.y);
1016 b.lineTo(p1.x, p1.y);
1017 g2.draw(b);
1018
1019 if (dualAlignActive) {
1020 // Draw reference ways
1021 drawReferenceSegment(g2, mv, dualAlignSegment1.p1, dualAlignSegment1.p2);
1022 drawReferenceSegment(g2, mv, dualAlignSegment2.p1, dualAlignSegment2.p2);
1023 } else if (activeMoveDirection != null) {
1024 // Draw reference way
1025 drawReferenceSegment(g2, mv, activeMoveDirection.p1, activeMoveDirection.p2);
1026
1027 // Draw right angle marker on first node position, only when moving at right angle
1028 if (activeMoveDirection.perpendicular) {
1029 // mirror RightAngle marker, so it is inside the extrude
1030 double headingRefWS = activeMoveDirection.p1.heading(activeMoveDirection.p2);
1031 double headingMoveDir = Math.atan2(normalUnitVector.getY(), normalUnitVector.getX());
1032 double headingDiff = headingRefWS - headingMoveDir;
1033 if (headingDiff < 0) headingDiff += 2 * Math.PI;
1034 boolean mirrorRA = Math.abs(headingDiff - Math.PI) > 1e-5;
1035 Point pr1 = mv.getPoint(activeMoveDirection.p1);
1036 drawAngleSymbol(g2, pr1, normalUnitVector, mirrorRA);
1037 }
1038 }
1039 } else if (mode == Mode.translate || mode == Mode.translate_node) {
1040 g2.setColor(mainColor);
1041 if (p1.distance(p2) < 3) {
1042 g2.setStroke(mainStroke);
1043 g2.drawOval((int)(p1.x-symbolSize/2), (int)(p1.y-symbolSize/2),
1044 (int)(symbolSize), (int)(symbolSize));
1045 } else {
1046 Line2D oldline = new Line2D.Double(p1, p2);
1047 g2.setStroke(oldLineStroke);
1048 g2.draw(oldline);
1049 }
1050
1051 if (dualAlignActive) {
1052 // Draw reference ways
1053 drawReferenceSegment(g2, mv, dualAlignSegment1.p1, dualAlignSegment1.p2);
1054 drawReferenceSegment(g2, mv, dualAlignSegment2.p1, dualAlignSegment2.p2);
1055 } else if (activeMoveDirection != null) {
1056
1057 g2.setColor(helperColor);
1058 g2.setStroke(helperStrokeDash);
1059 // Draw a guideline along the normal.
1060 Line2D normline;
1061 Point2D centerpoint = new Point2D.Double((p1.getX()+p2.getX())*0.5, (p1.getY()+p2.getY())*0.5);
1062 normline = createSemiInfiniteLine(centerpoint, normalUnitVector, g2);
1063 g2.draw(normline);
1064 // Draw right angle marker on initial position, only when moving at right angle
1065 if (activeMoveDirection.perpendicular) {
1066 // EastNorth units per pixel
1067 g2.setStroke(helperStrokeRA);
1068 g2.setColor(mainColor);
1069 drawAngleSymbol(g2, centerpoint, normalUnitVector, false);
1070 }
1071 }
1072 }
1073 }
1074 g2.setStroke(helperStrokeRA); // restore default stroke to prevent starnge occasional drawings
1075 }
1076 }
1077
1078 private Point2D getNormalUniVector() {
1079 double fac = 1.0 / activeMoveDirection.en.length();
1080 // mult by factor to get unit vector.
1081 Point2D normalUnitVector = new Point2D.Double(activeMoveDirection.en.getX() * fac, activeMoveDirection.en.getY() * fac);
1082
1083 // Check to see if our new N1 is in a positive direction with respect to the normalUnitVector.
1084 // Even if the x component is zero, we should still be able to discern using +0.0 and -0.0
1085 if (newN1en != null && ((newN1en.getX() > initialN1en.getX()) != (normalUnitVector.getX() > -0.0))) {
1086 // If not, use a sign-flipped version of the normalUnitVector.
1087 normalUnitVector = new Point2D.Double(-normalUnitVector.getX(), -normalUnitVector.getY());
1088 }
1089
1090 //HACK: swap Y, because the target pixels are top down, but EastNorth is bottom-up.
1091 //This is normally done by MapView.getPoint, but it does not work on vectors.
1092 normalUnitVector.setLocation(normalUnitVector.getX(), -normalUnitVector.getY());
1093 return normalUnitVector;
1094 }
1095
1096 /**
1097 * Draws right angle symbol at specified position.
1098 * @param g2 the Graphics2D object used to draw on
1099 * @param center center point of angle
1100 * @param normal vector of normal
1101 * @param mirror {@code true} if symbol should be mirrored by the normal
1102 */
1103 private void drawAngleSymbol(Graphics2D g2, Point2D center, Point2D normal, boolean mirror) {
1104 // EastNorth units per pixel
1105 double factor = 1.0/g2.getTransform().getScaleX();
1106 double raoffsetx = symbolSize*factor*normal.getX();
1107 double raoffsety = symbolSize*factor*normal.getY();
1108
1109 double cx = center.getX(), cy = center.getY();
1110 double k = (mirror ? -1 : 1);
1111 Point2D ra1 = new Point2D.Double(cx + raoffsetx, cy + raoffsety);
1112 Point2D ra3 = new Point2D.Double(cx - raoffsety*k, cy + raoffsetx*k);
1113 Point2D ra2 = new Point2D.Double(ra1.getX() - raoffsety*k, ra1.getY() + raoffsetx*k);
1114
1115 GeneralPath ra = new GeneralPath();
1116 ra.moveTo((float)ra1.getX(), (float)ra1.getY());
1117 ra.lineTo((float)ra2.getX(), (float)ra2.getY());
1118 ra.lineTo((float)ra3.getX(), (float)ra3.getY());
1119 g2.setStroke(helperStrokeRA);
1120 g2.draw(ra);
1121 }
1122
1123 /**
1124 * Draws given reference segment.
1125 * @param g2 the Graphics2D object used to draw on
1126 * @param mv
1127 * @param p1en segment's first point
1128 * @param p2en segment's second point
1129 */
1130 private void drawReferenceSegment(Graphics2D g2, MapView mv, EastNorth p1en, EastNorth p2en)
1131 {
1132 Point p1 = mv.getPoint(p1en);
1133 Point p2 = mv.getPoint(p2en);
1134 GeneralPath b = new GeneralPath();
1135 b.moveTo(p1.x, p1.y);
1136 b.lineTo(p2.x, p2.y);
1137 g2.setColor(helperColor);
1138 g2.setStroke(helperStrokeDash);
1139 g2.draw(b);
1140 }
1141
1142 /**
1143 * Creates a new Line that extends off the edge of the viewport in one direction
1144 * @param start The start point of the line
1145 * @param unitvector A unit vector denoting the direction of the line
1146 * @param g the Graphics2D object it will be used on
1147 * @return created line
1148 */
1149 private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
1150 Rectangle bounds = g.getDeviceConfiguration().getBounds();
1151 try {
1152 AffineTransform invtrans = g.getTransform().createInverse();
1153 Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width,0), null);
1154 Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0,bounds.height), null);
1155
1156 // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
1157 // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
1158 // This can be used as a safe length of line to generate which will always go off-viewport.
1159 double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY()) + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());
1160
1161 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * linelength) , start.getY() + (unitvector.getY() * linelength)));
1162 }
1163 catch (NoninvertibleTransformException e) {
1164 return new Line2D.Double(start, new Point2D.Double(start.getX() + (unitvector.getX() * 10) , start.getY() + (unitvector.getY() * 10)));
1165 }
1166 }
1167}
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