source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/DrawAction.java@ 10308

Last change on this file since 10308 was 10308, checked in by Don-vip, 8 years ago

sonar - squid:S1854 - Dead stores should be removed
  • Property svn:eol-style set to native
File size: 67.2 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;
7import static org.openstreetmap.josm.tools.I18n.trn;
8
9import java.awt.BasicStroke;
10import java.awt.Color;
11import java.awt.Cursor;
12import java.awt.Graphics2D;
13import java.awt.Point;
14import java.awt.Stroke;
15import java.awt.event.ActionEvent;
16import java.awt.event.KeyEvent;
17import java.awt.event.MouseEvent;
18import java.awt.event.MouseListener;
19import java.awt.geom.GeneralPath;
20import java.util.ArrayList;
21import java.util.Arrays;
22import java.util.Collection;
23import java.util.Collections;
24import java.util.HashMap;
25import java.util.HashSet;
26import java.util.Iterator;
27import java.util.LinkedList;
28import java.util.List;
29import java.util.Map;
30import java.util.Set;
31
32import javax.swing.AbstractAction;
33import javax.swing.JCheckBoxMenuItem;
34import javax.swing.JMenuItem;
35import javax.swing.JOptionPane;
36import javax.swing.JPopupMenu;
37
38import org.openstreetmap.josm.Main;
39import org.openstreetmap.josm.actions.JosmAction;
40import org.openstreetmap.josm.command.AddCommand;
41import org.openstreetmap.josm.command.ChangeCommand;
42import org.openstreetmap.josm.command.Command;
43import org.openstreetmap.josm.command.SequenceCommand;
44import org.openstreetmap.josm.data.Bounds;
45import org.openstreetmap.josm.data.SelectionChangedListener;
46import org.openstreetmap.josm.data.coor.EastNorth;
47import org.openstreetmap.josm.data.coor.LatLon;
48import org.openstreetmap.josm.data.osm.DataSet;
49import org.openstreetmap.josm.data.osm.Node;
50import org.openstreetmap.josm.data.osm.OsmPrimitive;
51import org.openstreetmap.josm.data.osm.Way;
52import org.openstreetmap.josm.data.osm.WaySegment;
53import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
54import org.openstreetmap.josm.gui.MainMenu;
55import org.openstreetmap.josm.gui.MapFrame;
56import org.openstreetmap.josm.gui.MapView;
57import org.openstreetmap.josm.gui.NavigatableComponent;
58import org.openstreetmap.josm.gui.layer.Layer;
59import org.openstreetmap.josm.gui.layer.MapViewPaintable;
60import org.openstreetmap.josm.gui.layer.OsmDataLayer;
61import org.openstreetmap.josm.gui.util.GuiHelper;
62import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
63import org.openstreetmap.josm.gui.util.ModifierListener;
64import org.openstreetmap.josm.gui.widgets.PopupMenuLauncher;
65import org.openstreetmap.josm.tools.Geometry;
66import org.openstreetmap.josm.tools.ImageProvider;
67import org.openstreetmap.josm.tools.Pair;
68import org.openstreetmap.josm.tools.Shortcut;
69import org.openstreetmap.josm.tools.Utils;
70
71/**
72 * Mapmode to add nodes, create and extend ways.
73 */
74public class DrawAction extends MapMode implements MapViewPaintable, SelectionChangedListener, KeyPressReleaseListener, ModifierListener {
75
76 private static final Color ORANGE_TRANSPARENT = new Color(Color.ORANGE.getRed(), Color.ORANGE.getGreen(), Color.ORANGE.getBlue(), 128);
77 private static final double PHI = Math.toRadians(90);
78
79 private final Cursor cursorJoinNode;
80 private final Cursor cursorJoinWay;
81
82 private transient Node lastUsedNode;
83 private double toleranceMultiplier;
84
85 private transient Node mouseOnExistingNode;
86 private transient Set<Way> mouseOnExistingWays = new HashSet<>();
87 // old highlights store which primitives are currently highlighted. This
88 // is true, even if target highlighting is disabled since the status bar
89 // derives its information from this list as well.
90 private transient Set<OsmPrimitive> oldHighlights = new HashSet<>();
91 // new highlights contains a list of primitives that should be highlighted
92 // but haven’t been so far. The idea is to compare old and new and only
93 // repaint if there are changes.
94 private transient Set<OsmPrimitive> newHighlights = new HashSet<>();
95 private boolean drawHelperLine;
96 private boolean wayIsFinished;
97 private boolean drawTargetHighlight;
98 private Point mousePos;
99 private Point oldMousePos;
100 private Color rubberLineColor;
101
102 private transient Node currentBaseNode;
103 private transient Node previousNode;
104 private EastNorth currentMouseEastNorth;
105
106 private final transient SnapHelper snapHelper = new SnapHelper();
107
108 private final transient Shortcut backspaceShortcut;
109 private final BackSpaceAction backspaceAction;
110 private final transient Shortcut snappingShortcut;
111 private boolean ignoreNextKeyRelease;
112
113 private final SnapChangeAction snapChangeAction;
114 private final JCheckBoxMenuItem snapCheckboxMenuItem;
115 private boolean useRepeatedShortcut;
116 private transient Stroke rubberLineStroke;
117 private static final BasicStroke BASIC_STROKE = new BasicStroke(1);
118
119 private static int snapToIntersectionThreshold;
120
121 /**
122 * Constructs a new {@code DrawAction}.
123 * @param mapFrame Map frame
124 */
125 public DrawAction(MapFrame mapFrame) {
126 super(tr("Draw"), "node/autonode", tr("Draw nodes"),
127 Shortcut.registerShortcut("mapmode:draw", tr("Mode: {0}", tr("Draw")), KeyEvent.VK_A, Shortcut.DIRECT),
128 mapFrame, ImageProvider.getCursor("crosshair", null));
129
130 snappingShortcut = Shortcut.registerShortcut("mapmode:drawanglesnapping",
131 tr("Mode: Draw Angle snapping"), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
132 snapChangeAction = new SnapChangeAction();
133 snapCheckboxMenuItem = addMenuItem();
134 snapHelper.setMenuCheckBox(snapCheckboxMenuItem);
135 backspaceShortcut = Shortcut.registerShortcut("mapmode:backspace",
136 tr("Backspace in Add mode"), KeyEvent.VK_BACK_SPACE, Shortcut.DIRECT);
137 backspaceAction = new BackSpaceAction();
138 cursorJoinNode = ImageProvider.getCursor("crosshair", "joinnode");
139 cursorJoinWay = ImageProvider.getCursor("crosshair", "joinway");
140
141 readPreferences();
142 snapHelper.init();
143 readPreferences();
144 }
145
146 private JCheckBoxMenuItem addMenuItem() {
147 int n = Main.main.menu.editMenu.getItemCount();
148 for (int i = n-1; i > 0; i--) {
149 JMenuItem item = Main.main.menu.editMenu.getItem(i);
150 if (item != null && item.getAction() != null && item.getAction() instanceof SnapChangeAction) {
151 Main.main.menu.editMenu.remove(i);
152 }
153 }
154 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, snapChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
155 }
156
157 /**
158 * Checks if a map redraw is required and does so if needed. Also updates the status bar.
159 * @return true if a repaint is needed
160 */
161 private boolean redrawIfRequired() {
162 updateStatusLine();
163 // repaint required if the helper line is active.
164 boolean needsRepaint = drawHelperLine && !wayIsFinished;
165 if (drawTargetHighlight) {
166 // move newHighlights to oldHighlights; only update changed primitives
167 for (OsmPrimitive x : newHighlights) {
168 if (oldHighlights.contains(x)) {
169 continue;
170 }
171 x.setHighlighted(true);
172 needsRepaint = true;
173 }
174 oldHighlights.removeAll(newHighlights);
175 for (OsmPrimitive x : oldHighlights) {
176 x.setHighlighted(false);
177 needsRepaint = true;
178 }
179 }
180 // required in order to print correct help text
181 oldHighlights = newHighlights;
182
183 if (!needsRepaint && !drawTargetHighlight)
184 return false;
185
186 // update selection to reflect which way being modified
187 DataSet currentDataSet = getCurrentDataSet();
188 if (getCurrentBaseNode() != null && currentDataSet != null && !currentDataSet.getSelected().isEmpty()) {
189 Way continueFrom = getWayForNode(getCurrentBaseNode());
190 if (alt && continueFrom != null && (!getCurrentBaseNode().isSelected() || continueFrom.isSelected())) {
191 addRemoveSelection(currentDataSet, getCurrentBaseNode(), continueFrom);
192 needsRepaint = true;
193 } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
194 currentDataSet.addSelected(continueFrom);
195 needsRepaint = true;
196 }
197 }
198
199 if (needsRepaint) {
200 Main.map.mapView.repaint();
201 }
202 return needsRepaint;
203 }
204
205 private static void addRemoveSelection(DataSet ds, OsmPrimitive toAdd, OsmPrimitive toRemove) {
206 ds.beginUpdate(); // to prevent the selection listener to screw around with the state
207 ds.addSelected(toAdd);
208 ds.clearSelection(toRemove);
209 ds.endUpdate();
210 }
211
212 @Override
213 public void enterMode() {
214 if (!isEnabled())
215 return;
216 super.enterMode();
217 readPreferences();
218
219 // determine if selection is suitable to continue drawing. If it
220 // isn't, set wayIsFinished to true to avoid superfluous repaints.
221 determineCurrentBaseNodeAndPreviousNode(getCurrentDataSet().getSelected());
222 wayIsFinished = getCurrentBaseNode() == null;
223
224 toleranceMultiplier = 0.01 * NavigatableComponent.PROP_SNAP_DISTANCE.get();
225
226 snapHelper.init();
227 snapCheckboxMenuItem.getAction().setEnabled(true);
228
229 Main.map.statusLine.getAnglePanel().addMouseListener(snapHelper.anglePopupListener);
230 Main.registerActionShortcut(backspaceAction, backspaceShortcut);
231
232 Main.map.mapView.addMouseListener(this);
233 Main.map.mapView.addMouseMotionListener(this);
234 Main.map.mapView.addTemporaryLayer(this);
235 DataSet.addSelectionListener(this);
236
237 Main.map.keyDetector.addKeyListener(this);
238 Main.map.keyDetector.addModifierListener(this);
239 ignoreNextKeyRelease = true;
240 }
241
242 @Override
243 protected void readPreferences() {
244 rubberLineColor = Main.pref.getColor(marktr("helper line"), null);
245 if (rubberLineColor == null) rubberLineColor = PaintColors.SELECTED.get();
246
247 rubberLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.stroke.helper-line", "3"));
248 drawHelperLine = Main.pref.getBoolean("draw.helper-line", true);
249 drawTargetHighlight = Main.pref.getBoolean("draw.target-highlight", true);
250 snapToIntersectionThreshold = Main.pref.getInteger("edit.snap-intersection-threshold", 10);
251 }
252
253 @Override
254 public void exitMode() {
255 super.exitMode();
256 Main.map.mapView.removeMouseListener(this);
257 Main.map.mapView.removeMouseMotionListener(this);
258 Main.map.mapView.removeTemporaryLayer(this);
259 DataSet.removeSelectionListener(this);
260 Main.unregisterActionShortcut(backspaceAction, backspaceShortcut);
261 snapHelper.unsetFixedMode();
262 snapCheckboxMenuItem.getAction().setEnabled(false);
263
264 Main.map.statusLine.getAnglePanel().removeMouseListener(snapHelper.anglePopupListener);
265 Main.map.statusLine.activateAnglePanel(false);
266
267 removeHighlighting();
268 Main.map.keyDetector.removeKeyListener(this);
269 Main.map.keyDetector.removeModifierListener(this);
270
271 // when exiting we let everybody know about the currently selected
272 // primitives
273 //
274 DataSet ds = getCurrentDataSet();
275 if (ds != null) {
276 ds.fireSelectionChanged();
277 }
278 }
279
280 /**
281 * redraw to (possibly) get rid of helper line if selection changes.
282 */
283 @Override
284 public void modifiersChanged(int modifiers) {
285 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
286 return;
287 updateKeyModifiers(modifiers);
288 computeHelperLine();
289 addHighlighting();
290 }
291
292 @Override
293 public void doKeyPressed(KeyEvent e) {
294 if (!snappingShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
295 return;
296 snapHelper.setFixedMode();
297 computeHelperLine();
298 redrawIfRequired();
299 }
300
301 @Override
302 public void doKeyReleased(KeyEvent e) {
303 if (!snappingShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
304 return;
305 if (ignoreNextKeyRelease) {
306 ignoreNextKeyRelease = false;
307 return;
308 }
309 snapHelper.unFixOrTurnOff();
310 computeHelperLine();
311 redrawIfRequired();
312 }
313
314 /**
315 * redraw to (possibly) get rid of helper line if selection changes.
316 */
317 @Override
318 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
319 if (!Main.map.mapView.isActiveLayerDrawable())
320 return;
321 computeHelperLine();
322 addHighlighting();
323 }
324
325 private void tryAgain(MouseEvent e) {
326 getCurrentDataSet().setSelected();
327 mouseReleased(e);
328 }
329
330 /**
331 * This function should be called when the user wishes to finish his current draw action.
332 * If Potlatch Style is enabled, it will switch to select tool, otherwise simply disable
333 * the helper line until the user chooses to draw something else.
334 */
335 private void finishDrawing() {
336 // let everybody else know about the current selection
337 //
338 Main.main.getCurrentDataSet().fireSelectionChanged();
339 lastUsedNode = null;
340 wayIsFinished = true;
341 Main.map.selectSelectTool(true);
342 snapHelper.noSnapNow();
343
344 // Redraw to remove the helper line stub
345 computeHelperLine();
346 removeHighlighting();
347 }
348
349 private Point rightClickPressPos;
350
351 @Override
352 public void mousePressed(MouseEvent e) {
353 if (e.getButton() == MouseEvent.BUTTON3) {
354 rightClickPressPos = e.getPoint();
355 }
356 }
357
358 /**
359 * If user clicked with the left button, add a node at the current mouse
360 * position.
361 *
362 * If in nodeway mode, insert the node into the way.
363 */
364 @Override
365 public void mouseReleased(MouseEvent e) {
366 if (e.getButton() == MouseEvent.BUTTON3) {
367 Point curMousePos = e.getPoint();
368 if (curMousePos.equals(rightClickPressPos)) {
369 tryToSetBaseSegmentForAngleSnap();
370 }
371 return;
372 }
373 if (e.getButton() != MouseEvent.BUTTON1)
374 return;
375 if (!Main.map.mapView.isActiveLayerDrawable())
376 return;
377 // request focus in order to enable the expected keyboard shortcuts
378 //
379 Main.map.mapView.requestFocus();
380
381 if (e.getClickCount() > 1 && mousePos != null && mousePos.equals(oldMousePos)) {
382 // A double click equals "user clicked last node again, finish way"
383 // Change draw tool only if mouse position is nearly the same, as
384 // otherwise fast clicks will count as a double click
385 finishDrawing();
386 return;
387 }
388 oldMousePos = mousePos;
389
390 // we copy ctrl/alt/shift from the event just in case our global
391 // keyDetector didn't make it through the security manager. Unclear
392 // if that can ever happen but better be safe.
393 updateKeyModifiers(e);
394 mousePos = e.getPoint();
395
396 DataSet ds = getCurrentDataSet();
397 Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
398
399 boolean newNode = false;
400 Node n = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
401 if (ctrl) {
402 Iterator<Way> it = getCurrentDataSet().getSelectedWays().iterator();
403 if (it.hasNext()) {
404 // ctrl-click on node of selected way = reuse node despite of ctrl
405 if (!it.next().containsNode(n)) n = null;
406 } else {
407 n = null; // ctrl-click + no selected way = new node
408 }
409 }
410
411 if (n != null && !snapHelper.isActive()) {
412 // user clicked on node
413 if (selection.isEmpty() || wayIsFinished) {
414 // select the clicked node and do nothing else
415 // (this is just a convenience option so that people don't
416 // have to switch modes)
417
418 getCurrentDataSet().setSelected(n);
419 // If we extend/continue an existing way, select it already now to make it obvious
420 Way continueFrom = getWayForNode(n);
421 if (continueFrom != null) {
422 getCurrentDataSet().addSelected(continueFrom);
423 }
424
425 // The user explicitly selected a node, so let him continue drawing
426 wayIsFinished = false;
427 return;
428 }
429 } else {
430 EastNorth newEN;
431 if (n != null) {
432 EastNorth foundPoint = n.getEastNorth();
433 // project found node to snapping line
434 newEN = snapHelper.getSnapPoint(foundPoint);
435 // do not add new node if there is some node within snapping distance
436 double tolerance = Main.map.mapView.getDist100Pixel() * toleranceMultiplier;
437 if (foundPoint.distance(newEN) > tolerance) {
438 n = new Node(newEN); // point != projected, so we create new node
439 newNode = true;
440 }
441 } else { // n==null, no node found in clicked area
442 EastNorth mouseEN = Main.map.mapView.getEastNorth(e.getX(), e.getY());
443 newEN = snapHelper.isSnapOn() ? snapHelper.getSnapPoint(mouseEN) : mouseEN;
444 n = new Node(newEN); //create node at clicked point
445 newNode = true;
446 }
447 snapHelper.unsetFixedMode();
448 }
449
450 Collection<Command> cmds = new LinkedList<>();
451 Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());
452 List<Way> reuseWays = new ArrayList<>();
453 List<Way> replacedWays = new ArrayList<>();
454
455 if (newNode) {
456 if (n.getCoor().isOutSideWorld()) {
457 JOptionPane.showMessageDialog(
458 Main.parent,
459 tr("Cannot add a node outside of the world."),
460 tr("Warning"),
461 JOptionPane.WARNING_MESSAGE
462 );
463 return;
464 }
465 cmds.add(new AddCommand(n));
466
467 if (!ctrl) {
468 // Insert the node into all the nearby way segments
469 List<WaySegment> wss = Main.map.mapView.getNearestWaySegments(
470 Main.map.mapView.getPoint(n), OsmPrimitive.isSelectablePredicate);
471 if (snapHelper.isActive()) {
472 tryToMoveNodeOnIntersection(wss, n);
473 }
474 insertNodeIntoAllNearbySegments(wss, n, newSelection, cmds, replacedWays, reuseWays);
475 }
476 }
477 // now "n" is newly created or reused node that shoud be added to some way
478
479 // This part decides whether or not a "segment" (i.e. a connection) is made to an existing node.
480
481 // For a connection to be made, the user must either have a node selected (connection
482 // is made to that node), or he must have a way selected *and* one of the endpoints
483 // of that way must be the last used node (connection is made to last used node), or
484 // he must have a way and a node selected (connection is made to the selected node).
485
486 // If the above does not apply, the selection is cleared and a new try is started
487
488 boolean extendedWay = false;
489 boolean wayIsFinishedTemp = wayIsFinished;
490 wayIsFinished = false;
491
492 // don't draw lines if shift is held
493 if (!selection.isEmpty() && !shift) {
494 Node selectedNode = null;
495 Way selectedWay = null;
496
497 for (OsmPrimitive p : selection) {
498 if (p instanceof Node) {
499 if (selectedNode != null) {
500 // Too many nodes selected to do something useful
501 tryAgain(e);
502 return;
503 }
504 selectedNode = (Node) p;
505 } else if (p instanceof Way) {
506 if (selectedWay != null) {
507 // Too many ways selected to do something useful
508 tryAgain(e);
509 return;
510 }
511 selectedWay = (Way) p;
512 }
513 }
514
515 // the node from which we make a connection
516 Node n0 = findNodeToContinueFrom(selectedNode, selectedWay);
517 // We have a selection but it isn't suitable. Try again.
518 if (n0 == null) {
519 tryAgain(e);
520 return;
521 }
522 if (!wayIsFinishedTemp) {
523 if (isSelfContainedWay(selectedWay, n0, n))
524 return;
525
526 // User clicked last node again, finish way
527 if (n0 == n) {
528 finishDrawing();
529 return;
530 }
531
532 // Ok we know now that we'll insert a line segment, but will it connect to an
533 // existing way or make a new way of its own? The "alt" modifier means that the
534 // user wants a new way.
535 Way way = alt ? null : (selectedWay != null ? selectedWay : getWayForNode(n0));
536 Way wayToSelect;
537
538 // Don't allow creation of self-overlapping ways
539 if (way != null) {
540 int nodeCount = 0;
541 for (Node p : way.getNodes()) {
542 if (p.equals(n0)) {
543 nodeCount++;
544 }
545 }
546 if (nodeCount > 1) {
547 way = null;
548 }
549 }
550
551 if (way == null) {
552 way = new Way();
553 way.addNode(n0);
554 cmds.add(new AddCommand(way));
555 wayToSelect = way;
556 } else {
557 int i;
558 if ((i = replacedWays.indexOf(way)) != -1) {
559 way = reuseWays.get(i);
560 wayToSelect = way;
561 } else {
562 wayToSelect = way;
563 Way wnew = new Way(way);
564 cmds.add(new ChangeCommand(way, wnew));
565 way = wnew;
566 }
567 }
568
569 // Connected to a node that's already in the way
570 if (way.containsNode(n)) {
571 wayIsFinished = true;
572 selection.clear();
573 }
574
575 // Add new node to way
576 if (way.getNode(way.getNodesCount() - 1) == n0) {
577 way.addNode(n);
578 } else {
579 way.addNode(0, n);
580 }
581
582 extendedWay = true;
583 newSelection.clear();
584 newSelection.add(wayToSelect);
585 }
586 }
587
588 String title;
589 if (!extendedWay) {
590 if (!newNode)
591 return; // We didn't do anything.
592 else if (reuseWays.isEmpty()) {
593 title = tr("Add node");
594 } else {
595 title = tr("Add node into way");
596 for (Way w : reuseWays) {
597 newSelection.remove(w);
598 }
599 }
600 newSelection.clear();
601 newSelection.add(n);
602 } else if (!newNode) {
603 title = tr("Connect existing way to node");
604 } else if (reuseWays.isEmpty()) {
605 title = tr("Add a new node to an existing way");
606 } else {
607 title = tr("Add node into way and connect");
608 }
609
610 Command c = new SequenceCommand(title, cmds);
611
612 Main.main.undoRedo.add(c);
613 if (!wayIsFinished) {
614 lastUsedNode = n;
615 }
616
617 getCurrentDataSet().setSelected(newSelection);
618
619 // "viewport following" mode for tracing long features
620 // from aerial imagery or GPS tracks.
621 if (n != null && Main.map.mapView.viewportFollowing) {
622 Main.map.mapView.smoothScrollTo(n.getEastNorth());
623 }
624 computeHelperLine();
625 removeHighlighting();
626 }
627
628 private void insertNodeIntoAllNearbySegments(List<WaySegment> wss, Node n, Collection<OsmPrimitive> newSelection,
629 Collection<Command> cmds, List<Way> replacedWays, List<Way> reuseWays) {
630 Map<Way, List<Integer>> insertPoints = new HashMap<>();
631 for (WaySegment ws : wss) {
632 List<Integer> is;
633 if (insertPoints.containsKey(ws.way)) {
634 is = insertPoints.get(ws.way);
635 } else {
636 is = new ArrayList<>();
637 insertPoints.put(ws.way, is);
638 }
639
640 is.add(ws.lowerIndex);
641 }
642
643 Set<Pair<Node, Node>> segSet = new HashSet<>();
644
645 for (Map.Entry<Way, List<Integer>> insertPoint : insertPoints.entrySet()) {
646 Way w = insertPoint.getKey();
647 List<Integer> is = insertPoint.getValue();
648
649 Way wnew = new Way(w);
650
651 pruneSuccsAndReverse(is);
652 for (int i : is) {
653 segSet.add(Pair.sort(new Pair<>(w.getNode(i), w.getNode(i+1))));
654 wnew.addNode(i + 1, n);
655 }
656
657 // If ALT is pressed, a new way should be created and that new way should get
658 // selected. This works everytime unless the ways the nodes get inserted into
659 // are already selected. This is the case when creating a self-overlapping way
660 // but pressing ALT prevents this. Therefore we must de-select the way manually
661 // here so /only/ the new way will be selected after this method finishes.
662 if (alt) {
663 newSelection.add(insertPoint.getKey());
664 }
665
666 cmds.add(new ChangeCommand(insertPoint.getKey(), wnew));
667 replacedWays.add(insertPoint.getKey());
668 reuseWays.add(wnew);
669 }
670
671 adjustNode(segSet, n);
672 }
673
674 /**
675 * Prevent creation of ways that look like this: &lt;----&gt;
676 * This happens if users want to draw a no-exit-sideway from the main way like this:
677 * ^
678 * |&lt;----&gt;
679 * |
680 * The solution isn't ideal because the main way will end in the side way, which is bad for
681 * navigation software ("drive straight on") but at least easier to fix. Maybe users will fix
682 * it on their own, too. At least it's better than producing an error.
683 *
684 * @param selectedWay the way to check
685 * @param currentNode the current node (i.e. the one the connection will be made from)
686 * @param targetNode the target node (i.e. the one the connection will be made to)
687 * @return {@code true} if this would create a selfcontaining way, {@code false} otherwise.
688 */
689 private boolean isSelfContainedWay(Way selectedWay, Node currentNode, Node targetNode) {
690 if (selectedWay != null) {
691 int posn0 = selectedWay.getNodes().indexOf(currentNode);
692 if (posn0 != -1 && // n0 is part of way
693 (posn0 >= 1 && targetNode.equals(selectedWay.getNode(posn0-1))) || // previous node
694 (posn0 < selectedWay.getNodesCount()-1) && targetNode.equals(selectedWay.getNode(posn0+1))) { // next node
695 getCurrentDataSet().setSelected(targetNode);
696 lastUsedNode = targetNode;
697 return true;
698 }
699 }
700
701 return false;
702 }
703
704 /**
705 * Finds a node to continue drawing from. Decision is based upon given node and way.
706 * @param selectedNode Currently selected node, may be null
707 * @param selectedWay Currently selected way, may be null
708 * @return Node if a suitable node is found, null otherwise
709 */
710 private Node findNodeToContinueFrom(Node selectedNode, Way selectedWay) {
711 // No nodes or ways have been selected, this occurs when a relation
712 // has been selected or the selection is empty
713 if (selectedNode == null && selectedWay == null)
714 return null;
715
716 if (selectedNode == null) {
717 if (selectedWay.isFirstLastNode(lastUsedNode))
718 return lastUsedNode;
719
720 // We have a way selected, but no suitable node to continue from. Start anew.
721 return null;
722 }
723
724 if (selectedWay == null)
725 return selectedNode;
726
727 if (selectedWay.isFirstLastNode(selectedNode))
728 return selectedNode;
729
730 // We have a way and node selected, but it's not at the start/end of the way. Start anew.
731 return null;
732 }
733
734 @Override
735 public void mouseDragged(MouseEvent e) {
736 mouseMoved(e);
737 }
738
739 @Override
740 public void mouseMoved(MouseEvent e) {
741 if (!Main.map.mapView.isActiveLayerDrawable())
742 return;
743
744 // we copy ctrl/alt/shift from the event just in case our global
745 // keyDetector didn't make it through the security manager. Unclear
746 // if that can ever happen but better be safe.
747 updateKeyModifiers(e);
748 mousePos = e.getPoint();
749 if (snapHelper.isSnapOn() && ctrl)
750 tryToSetBaseSegmentForAngleSnap();
751
752 computeHelperLine();
753 addHighlighting();
754 }
755
756 /**
757 * This method is used to detect segment under mouse and use it as reference for angle snapping
758 */
759 private void tryToSetBaseSegmentForAngleSnap() {
760 WaySegment seg = Main.map.mapView.getNearestWaySegment(mousePos, OsmPrimitive.isSelectablePredicate);
761 if (seg != null) {
762 snapHelper.setBaseSegment(seg);
763 }
764 }
765
766 /**
767 * This method prepares data required for painting the "helper line" from
768 * the last used position to the mouse cursor. It duplicates some code from
769 * mouseReleased() (FIXME).
770 */
771 private void computeHelperLine() {
772 if (mousePos == null) {
773 // Don't draw the line.
774 currentMouseEastNorth = null;
775 currentBaseNode = null;
776 return;
777 }
778
779 Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected();
780
781 MapView mv = Main.map.mapView;
782 Node currentMouseNode = null;
783 mouseOnExistingNode = null;
784 mouseOnExistingWays = new HashSet<>();
785
786 showStatusInfo(-1, -1, -1, snapHelper.isSnapOn());
787
788 if (!ctrl && mousePos != null) {
789 currentMouseNode = mv.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
790 }
791
792 // We need this for highlighting and we'll only do so if we actually want to re-use
793 // *and* there is no node nearby (because nodes beat ways when re-using)
794 if (!ctrl && currentMouseNode == null) {
795 List<WaySegment> wss = mv.getNearestWaySegments(mousePos, OsmPrimitive.isSelectablePredicate);
796 for (WaySegment ws : wss) {
797 mouseOnExistingWays.add(ws.way);
798 }
799 }
800
801 if (currentMouseNode != null) {
802 // user clicked on node
803 if (selection.isEmpty()) return;
804 currentMouseEastNorth = currentMouseNode.getEastNorth();
805 mouseOnExistingNode = currentMouseNode;
806 } else {
807 // no node found in clicked area
808 currentMouseEastNorth = mv.getEastNorth(mousePos.x, mousePos.y);
809 }
810
811 determineCurrentBaseNodeAndPreviousNode(selection);
812 if (previousNode == null) {
813 snapHelper.noSnapNow();
814 }
815
816 if (getCurrentBaseNode() == null || getCurrentBaseNode() == currentMouseNode)
817 return; // Don't create zero length way segments.
818
819
820 double curHdg = Math.toDegrees(getCurrentBaseNode().getEastNorth()
821 .heading(currentMouseEastNorth));
822 double baseHdg = -1;
823 if (previousNode != null) {
824 EastNorth en = previousNode.getEastNorth();
825 if (en != null) {
826 baseHdg = Math.toDegrees(en.heading(getCurrentBaseNode().getEastNorth()));
827 }
828 }
829
830 snapHelper.checkAngleSnapping(currentMouseEastNorth, baseHdg, curHdg);
831
832 // status bar was filled by snapHelper
833 }
834
835 private static void showStatusInfo(double angle, double hdg, double distance, boolean activeFlag) {
836 Main.map.statusLine.setAngle(angle);
837 Main.map.statusLine.activateAnglePanel(activeFlag);
838 Main.map.statusLine.setHeading(hdg);
839 Main.map.statusLine.setDist(distance);
840 }
841
842 /**
843 * Helper function that sets fields currentBaseNode and previousNode
844 * @param selection
845 * uses also lastUsedNode field
846 */
847 private void determineCurrentBaseNodeAndPreviousNode(Collection<OsmPrimitive> selection) {
848 Node selectedNode = null;
849 Way selectedWay = null;
850 for (OsmPrimitive p : selection) {
851 if (p instanceof Node) {
852 if (selectedNode != null)
853 return;
854 selectedNode = (Node) p;
855 } else if (p instanceof Way) {
856 if (selectedWay != null)
857 return;
858 selectedWay = (Way) p;
859 }
860 }
861 // we are here, if not more than 1 way or node is selected,
862
863 // the node from which we make a connection
864 currentBaseNode = null;
865 previousNode = null;
866
867 // Try to find an open way to measure angle from it. The way is not to be continued!
868 // warning: may result in changes of currentBaseNode and previousNode
869 // please remove if bugs arise
870 if (selectedWay == null && selectedNode != null) {
871 for (OsmPrimitive p: selectedNode.getReferrers()) {
872 if (p.isUsable() && p instanceof Way && ((Way) p).isFirstLastNode(selectedNode)) {
873 if (selectedWay != null) { // two uncontinued ways, nothing to take as reference
874 selectedWay = null;
875 break;
876 } else {
877 // set us ~continue this way (measure angle from it)
878 selectedWay = (Way) p;
879 }
880 }
881 }
882 }
883
884 if (selectedNode == null) {
885 if (selectedWay == null)
886 return;
887 continueWayFromNode(selectedWay, lastUsedNode);
888 } else if (selectedWay == null) {
889 currentBaseNode = selectedNode;
890 } else if (!selectedWay.isDeleted()) { // fix #7118
891 continueWayFromNode(selectedWay, selectedNode);
892 }
893 }
894
895 /**
896 * if one of the ends of {@code way} is given {@code node},
897 * then set currentBaseNode = node and previousNode = adjacent node of way
898 * @param way way to continue
899 * @param node starting node
900 */
901 private void continueWayFromNode(Way way, Node node) {
902 int n = way.getNodesCount();
903 if (node == way.firstNode()) {
904 currentBaseNode = node;
905 if (n > 1) previousNode = way.getNode(1);
906 } else if (node == way.lastNode()) {
907 currentBaseNode = node;
908 if (n > 1) previousNode = way.getNode(n-2);
909 }
910 }
911
912 /**
913 * Repaint on mouse exit so that the helper line goes away.
914 */
915 @Override
916 public void mouseExited(MouseEvent e) {
917 if (!Main.map.mapView.isActiveLayerDrawable())
918 return;
919 mousePos = e.getPoint();
920 snapHelper.noSnapNow();
921 boolean repaintIssued = removeHighlighting();
922 // force repaint in case snapHelper needs one. If removeHighlighting
923 // caused one already, don’t do it again.
924 if (!repaintIssued) {
925 Main.map.mapView.repaint();
926 }
927 }
928
929 /**
930 * @param n node
931 * @return If the node is the end of exactly one way, return this.
932 * <code>null</code> otherwise.
933 */
934 public static Way getWayForNode(Node n) {
935 Way way = null;
936 for (Way w : Utils.filteredCollection(n.getReferrers(), Way.class)) {
937 if (!w.isUsable() || w.getNodesCount() < 1) {
938 continue;
939 }
940 Node firstNode = w.getNode(0);
941 Node lastNode = w.getNode(w.getNodesCount() - 1);
942 if ((firstNode == n || lastNode == n) && (firstNode != lastNode)) {
943 if (way != null)
944 return null;
945 way = w;
946 }
947 }
948 return way;
949 }
950
951 /**
952 * Replies the current base node, after having checked it is still usable (see #11105).
953 * @return the current base node (can be null). If not-null, it's guaranteed the node is usable
954 */
955 public Node getCurrentBaseNode() {
956 if (currentBaseNode != null && (currentBaseNode.getDataSet() == null || !currentBaseNode.isUsable())) {
957 currentBaseNode = null;
958 }
959 return currentBaseNode;
960 }
961
962 private static void pruneSuccsAndReverse(List<Integer> is) {
963 Set<Integer> is2 = new HashSet<>();
964 for (int i : is) {
965 if (!is2.contains(i - 1) && !is2.contains(i + 1)) {
966 is2.add(i);
967 }
968 }
969 is.clear();
970 is.addAll(is2);
971 Collections.sort(is);
972 Collections.reverse(is);
973 }
974
975 /**
976 * Adjusts the position of a node to lie on a segment (or a segment
977 * intersection).
978 *
979 * If one or more than two segments are passed, the node is adjusted
980 * to lie on the first segment that is passed.
981 *
982 * If two segments are passed, the node is adjusted to be at their
983 * intersection.
984 *
985 * No action is taken if no segments are passed.
986 *
987 * @param segs the segments to use as a reference when adjusting
988 * @param n the node to adjust
989 */
990 private static void adjustNode(Collection<Pair<Node, Node>> segs, Node n) {
991
992 switch (segs.size()) {
993 case 0:
994 return;
995 case 2:
996 // This computes the intersection between the two segments and adjusts the node position.
997 Iterator<Pair<Node, Node>> i = segs.iterator();
998 Pair<Node, Node> seg = i.next();
999 EastNorth pA = seg.a.getEastNorth();
1000 EastNorth pB = seg.b.getEastNorth();
1001 seg = i.next();
1002 EastNorth pC = seg.a.getEastNorth();
1003 EastNorth pD = seg.b.getEastNorth();
1004
1005 double u = det(pB.east() - pA.east(), pB.north() - pA.north(), pC.east() - pD.east(), pC.north() - pD.north());
1006
1007 // Check for parallel segments and do nothing if they are
1008 // In practice this will probably only happen when a way has been duplicated
1009
1010 if (u == 0)
1011 return;
1012
1013 // q is a number between 0 and 1
1014 // It is the point in the segment where the intersection occurs
1015 // if the segment is scaled to lenght 1
1016
1017 double q = det(pB.north() - pC.north(), pB.east() - pC.east(), pD.north() - pC.north(), pD.east() - pC.east()) / u;
1018 EastNorth intersection = new EastNorth(
1019 pB.east() + q * (pA.east() - pB.east()),
1020 pB.north() + q * (pA.north() - pB.north()));
1021
1022
1023 // only adjust to intersection if within snapToIntersectionThreshold pixel of mouse click; otherwise
1024 // fall through to default action.
1025 // (for semi-parallel lines, intersection might be miles away!)
1026 if (Main.map.mapView.getPoint2D(n).distance(Main.map.mapView.getPoint2D(intersection)) < snapToIntersectionThreshold) {
1027 n.setEastNorth(intersection);
1028 return;
1029 }
1030 default:
1031 EastNorth p = n.getEastNorth();
1032 seg = segs.iterator().next();
1033 pA = seg.a.getEastNorth();
1034 pB = seg.b.getEastNorth();
1035 double a = p.distanceSq(pB);
1036 double b = p.distanceSq(pA);
1037 double c = pA.distanceSq(pB);
1038 q = (a - b + c) / (2*c);
1039 n.setEastNorth(new EastNorth(pB.east() + q * (pA.east() - pB.east()), pB.north() + q * (pA.north() - pB.north())));
1040 }
1041 }
1042
1043 // helper for adjustNode
1044 static double det(double a, double b, double c, double d) {
1045 return a * d - b * c;
1046 }
1047
1048 private void tryToMoveNodeOnIntersection(List<WaySegment> wss, Node n) {
1049 if (wss.isEmpty())
1050 return;
1051 WaySegment ws = wss.get(0);
1052 EastNorth p1 = ws.getFirstNode().getEastNorth();
1053 EastNorth p2 = ws.getSecondNode().getEastNorth();
1054 if (snapHelper.dir2 != null && getCurrentBaseNode() != null) {
1055 EastNorth xPoint = Geometry.getSegmentSegmentIntersection(p1, p2, snapHelper.dir2,
1056 getCurrentBaseNode().getEastNorth());
1057 if (xPoint != null) {
1058 n.setEastNorth(xPoint);
1059 }
1060 }
1061 }
1062
1063 /**
1064 * Takes the data from computeHelperLine to determine which ways/nodes should be highlighted
1065 * (if feature enabled). Also sets the target cursor if appropriate. It adds the to-be-
1066 * highlighted primitives to newHighlights but does not actually highlight them. This work is
1067 * done in redrawIfRequired. This means, calling addHighlighting() without redrawIfRequired()
1068 * will leave the data in an inconsistent state.
1069 *
1070 * The status bar derives its information from oldHighlights, so in order to update the status
1071 * bar both addHighlighting() and repaintIfRequired() are needed, since former fills newHighlights
1072 * and latter processes them into oldHighlights.
1073 */
1074 private void addHighlighting() {
1075 newHighlights = new HashSet<>();
1076
1077 // if ctrl key is held ("no join"), don't highlight anything
1078 if (ctrl) {
1079 Main.map.mapView.setNewCursor(cursor, this);
1080 redrawIfRequired();
1081 return;
1082 }
1083
1084 // This happens when nothing is selected, but we still want to highlight the "target node"
1085 if (mouseOnExistingNode == null && getCurrentDataSet().getSelected().isEmpty()
1086 && mousePos != null) {
1087 mouseOnExistingNode = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
1088 }
1089
1090 if (mouseOnExistingNode != null) {
1091 Main.map.mapView.setNewCursor(cursorJoinNode, this);
1092 newHighlights.add(mouseOnExistingNode);
1093 redrawIfRequired();
1094 return;
1095 }
1096
1097 // Insert the node into all the nearby way segments
1098 if (mouseOnExistingWays.isEmpty()) {
1099 Main.map.mapView.setNewCursor(cursor, this);
1100 redrawIfRequired();
1101 return;
1102 }
1103
1104 Main.map.mapView.setNewCursor(cursorJoinWay, this);
1105 newHighlights.addAll(mouseOnExistingWays);
1106 redrawIfRequired();
1107 }
1108
1109 /**
1110 * Removes target highlighting from primitives. Issues repaint if required.
1111 * @return true if a repaint has been issued.
1112 */
1113 private boolean removeHighlighting() {
1114 newHighlights = new HashSet<>();
1115 return redrawIfRequired();
1116 }
1117
1118 @Override
1119 public void paint(Graphics2D g, MapView mv, Bounds box) {
1120 // sanity checks
1121 if (Main.map.mapView == null || mousePos == null
1122 // don't draw line if we don't know where from or where to
1123 || getCurrentBaseNode() == null || currentMouseEastNorth == null
1124 // don't draw line if mouse is outside window
1125 || !Main.map.mapView.getBounds().contains(mousePos))
1126 return;
1127
1128 Graphics2D g2 = g;
1129 snapHelper.drawIfNeeded(g2, mv);
1130 if (!drawHelperLine || wayIsFinished || shift)
1131 return;
1132
1133 if (!snapHelper.isActive()) { // else use color and stoke from snapHelper.draw
1134 g2.setColor(rubberLineColor);
1135 g2.setStroke(rubberLineStroke);
1136 } else if (!snapHelper.drawConstructionGeometry)
1137 return;
1138 GeneralPath b = new GeneralPath();
1139 Point p1 = mv.getPoint(getCurrentBaseNode());
1140 Point p2 = mv.getPoint(currentMouseEastNorth);
1141
1142 double t = Math.atan2((double) p2.y - p1.y, (double) p2.x - p1.x) + Math.PI;
1143
1144 b.moveTo(p1.x, p1.y);
1145 b.lineTo(p2.x, p2.y);
1146
1147 // if alt key is held ("start new way"), draw a little perpendicular line
1148 if (alt) {
1149 b.moveTo((int) (p1.x + 8*Math.cos(t+PHI)), (int) (p1.y + 8*Math.sin(t+PHI)));
1150 b.lineTo((int) (p1.x + 8*Math.cos(t-PHI)), (int) (p1.y + 8*Math.sin(t-PHI)));
1151 }
1152
1153 g2.draw(b);
1154 g2.setStroke(BASIC_STROKE);
1155 }
1156
1157 @Override
1158 public String getModeHelpText() {
1159 StringBuilder rv;
1160 /*
1161 * No modifiers: all (Connect, Node Re-Use, Auto-Weld)
1162 * CTRL: disables node re-use, auto-weld
1163 * Shift: do not make connection
1164 * ALT: make connection but start new way in doing so
1165 */
1166
1167 /*
1168 * Status line text generation is split into two parts to keep it maintainable.
1169 * First part looks at what will happen to the new node inserted on click and
1170 * the second part will look if a connection is made or not.
1171 *
1172 * Note that this help text is not absolutely accurate as it doesn't catch any special
1173 * cases (e.g. when preventing <---> ways). The only special that it catches is when
1174 * a way is about to be finished.
1175 *
1176 * First check what happens to the new node.
1177 */
1178
1179 // oldHighlights stores the current highlights. If this
1180 // list is empty we can assume that we won't do any joins
1181 if (ctrl || oldHighlights.isEmpty()) {
1182 rv = new StringBuilder(tr("Create new node."));
1183 } else {
1184 // oldHighlights may store a node or way, check if it's a node
1185 OsmPrimitive x = oldHighlights.iterator().next();
1186 if (x instanceof Node) {
1187 rv = new StringBuilder(tr("Select node under cursor."));
1188 } else {
1189 rv = new StringBuilder(trn("Insert new node into way.", "Insert new node into {0} ways.",
1190 oldHighlights.size(), oldHighlights.size()));
1191 }
1192 }
1193
1194 /*
1195 * Check whether a connection will be made
1196 */
1197 if (getCurrentBaseNode() != null && !wayIsFinished) {
1198 if (alt) {
1199 rv.append(' ').append(tr("Start new way from last node."));
1200 } else {
1201 rv.append(' ').append(tr("Continue way from last node."));
1202 }
1203 if (snapHelper.isSnapOn()) {
1204 rv.append(' ').append(tr("Angle snapping active."));
1205 }
1206 }
1207
1208 Node n = mouseOnExistingNode;
1209 /*
1210 * Handle special case: Highlighted node == selected node => finish drawing
1211 */
1212 if (n != null && getCurrentDataSet() != null && getCurrentDataSet().getSelectedNodes().contains(n)) {
1213 if (wayIsFinished) {
1214 rv = new StringBuilder(tr("Select node under cursor."));
1215 } else {
1216 rv = new StringBuilder(tr("Finish drawing."));
1217 }
1218 }
1219
1220 /*
1221 * Handle special case: Self-Overlapping or closing way
1222 */
1223 if (getCurrentDataSet() != null && !getCurrentDataSet().getSelectedWays().isEmpty() && !wayIsFinished && !alt) {
1224 Way w = getCurrentDataSet().getSelectedWays().iterator().next();
1225 for (Node m : w.getNodes()) {
1226 if (m.equals(mouseOnExistingNode) || mouseOnExistingWays.contains(w)) {
1227 rv.append(' ').append(tr("Finish drawing."));
1228 break;
1229 }
1230 }
1231 }
1232 return rv.toString();
1233 }
1234
1235 /**
1236 * Get selected primitives, while draw action is in progress.
1237 *
1238 * While drawing a way, technically the last node is selected.
1239 * This is inconvenient when the user tries to add/edit tags to the way.
1240 * For this case, this method returns the current way as selection,
1241 * to work around this issue.
1242 * Otherwise the normal selection of the current data layer is returned.
1243 * @return selected primitives, while draw action is in progress
1244 */
1245 public Collection<OsmPrimitive> getInProgressSelection() {
1246 DataSet ds = getCurrentDataSet();
1247 if (ds == null) return null;
1248 if (getCurrentBaseNode() != null && !ds.getSelected().isEmpty()) {
1249 Way continueFrom = getWayForNode(getCurrentBaseNode());
1250 if (continueFrom != null)
1251 return Collections.<OsmPrimitive>singleton(continueFrom);
1252 }
1253 return ds.getSelected();
1254 }
1255
1256 @Override
1257 public boolean layerIsSupported(Layer l) {
1258 return l instanceof OsmDataLayer;
1259 }
1260
1261 @Override
1262 protected void updateEnabledState() {
1263 setEnabled(getEditLayer() != null);
1264 }
1265
1266 @Override
1267 public void destroy() {
1268 super.destroy();
1269 snapChangeAction.destroy();
1270 }
1271
1272 public class BackSpaceAction extends AbstractAction {
1273
1274 @Override
1275 public void actionPerformed(ActionEvent e) {
1276 Main.main.undoRedo.undo();
1277 Command lastCmd = Main.main.undoRedo.commands.peekLast();
1278 if (lastCmd == null) return;
1279 Node n = null;
1280 for (OsmPrimitive p: lastCmd.getParticipatingPrimitives()) {
1281 if (p instanceof Node) {
1282 if (n == null) {
1283 n = (Node) p; // found one node
1284 wayIsFinished = false;
1285 } else {
1286 // if more than 1 node were affected by previous command,
1287 // we have no way to continue, so we forget about found node
1288 n = null;
1289 break;
1290 }
1291 }
1292 }
1293 // select last added node - maybe we will continue drawing from it
1294 if (n != null) {
1295 getCurrentDataSet().addSelected(n);
1296 }
1297 }
1298 }
1299
1300 private class SnapHelper {
1301 private final class AnglePopupMenu extends JPopupMenu {
1302
1303 private final JCheckBoxMenuItem repeatedCb = new JCheckBoxMenuItem(
1304 new AbstractAction(tr("Toggle snapping by {0}", getShortcut().getKeyText())) {
1305 @Override
1306 public void actionPerformed(ActionEvent e) {
1307 boolean sel = ((JCheckBoxMenuItem) e.getSource()).getState();
1308 Main.pref.put("draw.anglesnap.toggleOnRepeatedA", sel);
1309 init();
1310 }
1311 });
1312
1313 private final JCheckBoxMenuItem helperCb = new JCheckBoxMenuItem(
1314 new AbstractAction(tr("Show helper geometry")) {
1315 @Override
1316 public void actionPerformed(ActionEvent e) {
1317 boolean sel = ((JCheckBoxMenuItem) e.getSource()).getState();
1318 Main.pref.put("draw.anglesnap.drawConstructionGeometry", sel);
1319 Main.pref.put("draw.anglesnap.drawProjectedPoint", sel);
1320 Main.pref.put("draw.anglesnap.showAngle", sel);
1321 init();
1322 enableSnapping();
1323 }
1324 });
1325
1326 private final JCheckBoxMenuItem projectionCb = new JCheckBoxMenuItem(
1327 new AbstractAction(tr("Snap to node projections")) {
1328 @Override
1329 public void actionPerformed(ActionEvent e) {
1330 boolean sel = ((JCheckBoxMenuItem) e.getSource()).getState();
1331 Main.pref.put("draw.anglesnap.projectionsnap", sel);
1332 init();
1333 enableSnapping();
1334 }
1335 });
1336
1337 private AnglePopupMenu() {
1338 helperCb.setState(Main.pref.getBoolean("draw.anglesnap.drawConstructionGeometry", true));
1339 projectionCb.setState(Main.pref.getBoolean("draw.anglesnap.projectionsnapgvff", true));
1340 repeatedCb.setState(Main.pref.getBoolean("draw.anglesnap.toggleOnRepeatedA", true));
1341 add(repeatedCb);
1342 add(helperCb);
1343 add(projectionCb);
1344 add(new AbstractAction(tr("Disable")) {
1345 @Override public void actionPerformed(ActionEvent e) {
1346 saveAngles("180");
1347 init();
1348 enableSnapping();
1349 }
1350 });
1351 add(new AbstractAction(tr("0,90,...")) {
1352 @Override public void actionPerformed(ActionEvent e) {
1353 saveAngles("0", "90", "180");
1354 init();
1355 enableSnapping();
1356 }
1357 });
1358 add(new AbstractAction(tr("0,45,90,...")) {
1359 @Override public void actionPerformed(ActionEvent e) {
1360 saveAngles("0", "45", "90", "135", "180");
1361 init();
1362 enableSnapping();
1363 }
1364 });
1365 add(new AbstractAction(tr("0,30,45,60,90,...")) {
1366 @Override public void actionPerformed(ActionEvent e) {
1367 saveAngles("0", "30", "45", "60", "90", "120", "135", "150", "180");
1368 init();
1369 enableSnapping();
1370 }
1371 });
1372 }
1373 }
1374
1375 private boolean snapOn; // snapping is turned on
1376
1377 private boolean active; // snapping is active for current mouse position
1378 private boolean fixed; // snap angle is fixed
1379 private boolean absoluteFix; // snap angle is absolute
1380
1381 private boolean drawConstructionGeometry;
1382 private boolean showProjectedPoint;
1383 private boolean showAngle;
1384
1385 private boolean snapToProjections;
1386
1387 private EastNorth dir2;
1388 private EastNorth projected;
1389 private String labelText;
1390 private double lastAngle;
1391
1392 private double customBaseHeading = -1; // angle of base line, if not last segment)
1393 private EastNorth segmentPoint1; // remembered first point of base segment
1394 private EastNorth segmentPoint2; // remembered second point of base segment
1395 private EastNorth projectionSource; // point that we are projecting to the line
1396
1397 private double[] snapAngles;
1398 private double snapAngleTolerance;
1399
1400 private double pe, pn; // (pe, pn) - direction of snapping line
1401 private double e0, n0; // (e0, n0) - origin of snapping line
1402
1403 private final String fixFmt = "%d "+tr("FIX");
1404 private Color snapHelperColor;
1405 private Color highlightColor;
1406
1407 private Stroke normalStroke;
1408 private Stroke helperStroke;
1409 private Stroke highlightStroke;
1410
1411 private JCheckBoxMenuItem checkBox;
1412
1413 private final MouseListener anglePopupListener = new PopupMenuLauncher(new AnglePopupMenu()) {
1414 @Override
1415 public void mouseClicked(MouseEvent e) {
1416 super.mouseClicked(e);
1417 if (e.getButton() == MouseEvent.BUTTON1) {
1418 toggleSnapping();
1419 updateStatusLine();
1420 }
1421 }
1422 };
1423
1424 public void init() {
1425 snapOn = false;
1426 checkBox.setState(snapOn);
1427 fixed = false;
1428 absoluteFix = false;
1429
1430 Collection<String> angles = Main.pref.getCollection("draw.anglesnap.angles",
1431 Arrays.asList("0", "30", "45", "60", "90", "120", "135", "150", "180"));
1432
1433 snapAngles = new double[2*angles.size()];
1434 int i = 0;
1435 for (String s: angles) {
1436 try {
1437 snapAngles[i] = Double.parseDouble(s); i++;
1438 snapAngles[i] = 360-Double.parseDouble(s); i++;
1439 } catch (NumberFormatException e) {
1440 Main.warn("Incorrect number in draw.anglesnap.angles preferences: "+s);
1441 snapAngles[i] = 0; i++;
1442 snapAngles[i] = 0; i++;
1443 }
1444 }
1445 snapAngleTolerance = Main.pref.getDouble("draw.anglesnap.tolerance", 5.0);
1446 drawConstructionGeometry = Main.pref.getBoolean("draw.anglesnap.drawConstructionGeometry", true);
1447 showProjectedPoint = Main.pref.getBoolean("draw.anglesnap.drawProjectedPoint", true);
1448 snapToProjections = Main.pref.getBoolean("draw.anglesnap.projectionsnap", true);
1449
1450 showAngle = Main.pref.getBoolean("draw.anglesnap.showAngle", true);
1451 useRepeatedShortcut = Main.pref.getBoolean("draw.anglesnap.toggleOnRepeatedA", true);
1452
1453 normalStroke = rubberLineStroke;
1454 snapHelperColor = Main.pref.getColor(marktr("draw angle snap"), Color.ORANGE);
1455
1456 highlightColor = Main.pref.getColor(marktr("draw angle snap highlight"), ORANGE_TRANSPARENT);
1457 highlightStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.anglesnap.stroke.highlight", "10"));
1458 helperStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.anglesnap.stroke.helper", "1 4"));
1459 }
1460
1461 public void saveAngles(String ... angles) {
1462 Main.pref.putCollection("draw.anglesnap.angles", Arrays.asList(angles));
1463 }
1464
1465 public void setMenuCheckBox(JCheckBoxMenuItem checkBox) {
1466 this.checkBox = checkBox;
1467 }
1468
1469 public void drawIfNeeded(Graphics2D g2, MapView mv) {
1470 if (!snapOn || !active)
1471 return;
1472 Point p1 = mv.getPoint(getCurrentBaseNode());
1473 Point p2 = mv.getPoint(dir2);
1474 Point p3 = mv.getPoint(projected);
1475 GeneralPath b;
1476 if (drawConstructionGeometry) {
1477 g2.setColor(snapHelperColor);
1478 g2.setStroke(helperStroke);
1479
1480 b = new GeneralPath();
1481 if (absoluteFix) {
1482 b.moveTo(p2.x, p2.y);
1483 b.lineTo(2d*p1.x-p2.x, 2d*p1.y-p2.y); // bi-directional line
1484 } else {
1485 b.moveTo(p2.x, p2.y);
1486 b.lineTo(p3.x, p3.y);
1487 }
1488 g2.draw(b);
1489 }
1490 if (projectionSource != null) {
1491 g2.setColor(snapHelperColor);
1492 g2.setStroke(helperStroke);
1493 b = new GeneralPath();
1494 b.moveTo(p3.x, p3.y);
1495 Point pp = mv.getPoint(projectionSource);
1496 b.lineTo(pp.x, pp.y);
1497 g2.draw(b);
1498 }
1499
1500 if (customBaseHeading >= 0) {
1501 g2.setColor(highlightColor);
1502 g2.setStroke(highlightStroke);
1503 b = new GeneralPath();
1504 Point pp1 = mv.getPoint(segmentPoint1);
1505 Point pp2 = mv.getPoint(segmentPoint2);
1506 b.moveTo(pp1.x, pp1.y);
1507 b.lineTo(pp2.x, pp2.y);
1508 g2.draw(b);
1509 }
1510
1511 g2.setColor(rubberLineColor);
1512 g2.setStroke(normalStroke);
1513 b = new GeneralPath();
1514 b.moveTo(p1.x, p1.y);
1515 b.lineTo(p3.x, p3.y);
1516 g2.draw(b);
1517
1518 g2.drawString(labelText, p3.x-5, p3.y+20);
1519 if (showProjectedPoint) {
1520 g2.setStroke(normalStroke);
1521 g2.drawOval(p3.x-5, p3.y-5, 10, 10); // projected point
1522 }
1523
1524 g2.setColor(snapHelperColor);
1525 g2.setStroke(helperStroke);
1526 }
1527
1528 /* If mouse position is close to line at 15-30-45-... angle, remembers this direction
1529 */
1530 public void checkAngleSnapping(EastNorth currentEN, double baseHeading, double curHeading) {
1531 EastNorth p0 = getCurrentBaseNode().getEastNorth();
1532 EastNorth snapPoint = currentEN;
1533 double angle = -1;
1534
1535 double activeBaseHeading = (customBaseHeading >= 0) ? customBaseHeading : baseHeading;
1536
1537 if (snapOn && (activeBaseHeading >= 0)) {
1538 angle = curHeading - activeBaseHeading;
1539 if (angle < 0) {
1540 angle += 360;
1541 }
1542 if (angle > 360) {
1543 angle = 0;
1544 }
1545
1546 double nearestAngle;
1547 if (fixed) {
1548 nearestAngle = lastAngle; // if direction is fixed use previous angle
1549 active = true;
1550 } else {
1551 nearestAngle = getNearestAngle(angle);
1552 if (getAngleDelta(nearestAngle, angle) < snapAngleTolerance) {
1553 active = customBaseHeading >= 0 || Math.abs(nearestAngle - 180) > 1e-3;
1554 // if angle is to previous segment, exclude 180 degrees
1555 lastAngle = nearestAngle;
1556 } else {
1557 active = false;
1558 }
1559 }
1560
1561 if (active) {
1562 double phi;
1563 e0 = p0.east();
1564 n0 = p0.north();
1565 buildLabelText((nearestAngle <= 180) ? nearestAngle : (nearestAngle-360));
1566
1567 phi = (nearestAngle + activeBaseHeading) * Math.PI / 180;
1568 // (pe,pn) - direction of snapping line
1569 pe = Math.sin(phi);
1570 pn = Math.cos(phi);
1571 double scale = 20 * Main.map.mapView.getDist100Pixel();
1572 dir2 = new EastNorth(e0 + scale * pe, n0 + scale * pn);
1573 snapPoint = getSnapPoint(currentEN);
1574 } else {
1575 noSnapNow();
1576 }
1577 }
1578
1579 // find out the distance, in metres, between the base point and projected point
1580 LatLon mouseLatLon = Main.map.mapView.getProjection().eastNorth2latlon(snapPoint);
1581 double distance = getCurrentBaseNode().getCoor().greatCircleDistance(mouseLatLon);
1582 double hdg = Math.toDegrees(p0.heading(snapPoint));
1583 // heading of segment from current to calculated point, not to mouse position
1584
1585 if (baseHeading >= 0) { // there is previous line segment with some heading
1586 angle = hdg - baseHeading;
1587 if (angle < 0) {
1588 angle += 360;
1589 }
1590 if (angle > 360) {
1591 angle = 0;
1592 }
1593 }
1594 showStatusInfo(angle, hdg, distance, isSnapOn());
1595 }
1596
1597 private void buildLabelText(double nearestAngle) {
1598 if (showAngle) {
1599 if (fixed) {
1600 if (absoluteFix) {
1601 labelText = "=";
1602 } else {
1603 labelText = String.format(fixFmt, (int) nearestAngle);
1604 }
1605 } else {
1606 labelText = String.format("%d", (int) nearestAngle);
1607 }
1608 } else {
1609 if (fixed) {
1610 if (absoluteFix) {
1611 labelText = "=";
1612 } else {
1613 labelText = String.format(tr("FIX"), 0);
1614 }
1615 } else {
1616 labelText = "";
1617 }
1618 }
1619 }
1620
1621 public EastNorth getSnapPoint(EastNorth p) {
1622 if (!active)
1623 return p;
1624 double de = p.east()-e0;
1625 double dn = p.north()-n0;
1626 double l = de*pe+dn*pn;
1627 double delta = Main.map.mapView.getDist100Pixel()/20;
1628 if (!absoluteFix && l < delta) {
1629 active = false;
1630 return p;
1631 } // do not go backward!
1632
1633 projectionSource = null;
1634 if (snapToProjections) {
1635 DataSet ds = getCurrentDataSet();
1636 Collection<Way> selectedWays = ds.getSelectedWays();
1637 if (selectedWays.size() == 1) {
1638 Way w = selectedWays.iterator().next();
1639 Collection<EastNorth> pointsToProject = new ArrayList<>();
1640 if (w.getNodesCount() < 1000) {
1641 for (Node n: w.getNodes()) {
1642 pointsToProject.add(n.getEastNorth());
1643 }
1644 }
1645 if (customBaseHeading >= 0) {
1646 pointsToProject.add(segmentPoint1);
1647 pointsToProject.add(segmentPoint2);
1648 }
1649 EastNorth enOpt = null;
1650 double dOpt = 1e5;
1651 for (EastNorth en: pointsToProject) { // searching for besht projection
1652 double l1 = (en.east()-e0)*pe+(en.north()-n0)*pn;
1653 double d1 = Math.abs(l1-l);
1654 if (d1 < delta && d1 < dOpt) {
1655 l = l1;
1656 enOpt = en;
1657 dOpt = d1;
1658 }
1659 }
1660 if (enOpt != null) {
1661 projectionSource = enOpt;
1662 }
1663 }
1664 }
1665 projected = new EastNorth(e0+l*pe, n0+l*pn);
1666 return projected;
1667 }
1668
1669 public void noSnapNow() {
1670 active = false;
1671 dir2 = null;
1672 projected = null;
1673 labelText = null;
1674 }
1675
1676 public void setBaseSegment(WaySegment seg) {
1677 if (seg == null) return;
1678 segmentPoint1 = seg.getFirstNode().getEastNorth();
1679 segmentPoint2 = seg.getSecondNode().getEastNorth();
1680
1681 double hdg = segmentPoint1.heading(segmentPoint2);
1682 hdg = Math.toDegrees(hdg);
1683 if (hdg < 0) {
1684 hdg += 360;
1685 }
1686 if (hdg > 360) {
1687 hdg -= 360;
1688 }
1689 customBaseHeading = hdg;
1690 }
1691
1692 private void enableSnapping() {
1693 snapOn = true;
1694 checkBox.setState(snapOn);
1695 customBaseHeading = -1;
1696 unsetFixedMode();
1697 }
1698
1699 private void toggleSnapping() {
1700 snapOn = !snapOn;
1701 checkBox.setState(snapOn);
1702 customBaseHeading = -1;
1703 unsetFixedMode();
1704 }
1705
1706 public void setFixedMode() {
1707 if (active) {
1708 fixed = true;
1709 }
1710 }
1711
1712 public void unsetFixedMode() {
1713 fixed = false;
1714 absoluteFix = false;
1715 lastAngle = 0;
1716 active = false;
1717 }
1718
1719 public boolean isActive() {
1720 return active;
1721 }
1722
1723 public boolean isSnapOn() {
1724 return snapOn;
1725 }
1726
1727 private double getNearestAngle(double angle) {
1728 double delta, minDelta = 1e5, bestAngle = 0.0;
1729 for (double snapAngle : snapAngles) {
1730 delta = getAngleDelta(angle, snapAngle);
1731 if (delta < minDelta) {
1732 minDelta = delta;
1733 bestAngle = snapAngle;
1734 }
1735 }
1736 if (Math.abs(bestAngle-360) < 1e-3) {
1737 bestAngle = 0;
1738 }
1739 return bestAngle;
1740 }
1741
1742 private double getAngleDelta(double a, double b) {
1743 double delta = Math.abs(a-b);
1744 if (delta > 180)
1745 return 360-delta;
1746 else
1747 return delta;
1748 }
1749
1750 private void unFixOrTurnOff() {
1751 if (absoluteFix) {
1752 unsetFixedMode();
1753 } else {
1754 toggleSnapping();
1755 }
1756 }
1757 }
1758
1759 private class SnapChangeAction extends JosmAction {
1760 /**
1761 * Constructs a new {@code SnapChangeAction}.
1762 */
1763 SnapChangeAction() {
1764 super(tr("Angle snapping"), /* ICON() */ "anglesnap",
1765 tr("Switch angle snapping mode while drawing"), null, false);
1766 putValue("help", ht("/Action/Draw/AngleSnap"));
1767 }
1768
1769 @Override
1770 public void actionPerformed(ActionEvent e) {
1771 if (snapHelper != null) {
1772 snapHelper.toggleSnapping();
1773 }
1774 }
1775
1776 @Override
1777 protected void updateEnabledState() {
1778 setEnabled(Main.map != null && Main.map.mapMode instanceof DrawAction);
1779 }
1780 }
1781}
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