source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/DrawAction.java@ 8308

Last change on this file since 8308 was 8308, checked in by Don-vip, 9 years ago

fix potential NPEs and Sonar issues related to serialization
  • Property svn:eol-style set to native
File size: 66.6 KB
Line 
1// License: GPL. See LICENSE file for details.
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 private final Cursor cursorJoinNode;
76 private final Cursor cursorJoinWay;
77
78 private transient Node lastUsedNode = null;
79 private static final double PHI = Math.toRadians(90);
80 private double toleranceMultiplier;
81
82 private transient Node mouseOnExistingNode;
83 private transient Set<Way> mouseOnExistingWays = new HashSet<>();
84 // old highlights store which primitives are currently highlighted. This
85 // is true, even if target highlighting is disabled since the status bar
86 // derives its information from this list as well.
87 private transient Set<OsmPrimitive> oldHighlights = new HashSet<>();
88 // new highlights contains a list of primitives that should be highlighted
89 // but haven’t been so far. The idea is to compare old and new and only
90 // repaint if there are changes.
91 private transient Set<OsmPrimitive> newHighlights = new HashSet<>();
92 private boolean drawHelperLine;
93 private boolean wayIsFinished = false;
94 private boolean drawTargetHighlight;
95 private Point mousePos;
96 private Point oldMousePos;
97 private Color rubberLineColor;
98
99 private transient Node currentBaseNode;
100 private transient Node previousNode;
101 private EastNorth currentMouseEastNorth;
102
103 private final transient SnapHelper snapHelper = new SnapHelper();
104
105 private final transient Shortcut backspaceShortcut;
106 private final BackSpaceAction backspaceAction;
107 private final transient Shortcut snappingShortcut;
108 private boolean ignoreNextKeyRelease;
109
110 private final SnapChangeAction snapChangeAction;
111 private final JCheckBoxMenuItem snapCheckboxMenuItem;
112 private boolean useRepeatedShortcut;
113 private transient Stroke rubberLineStroke;
114 private static final BasicStroke BASIC_STROKE = new BasicStroke(1);
115
116 private static int snapToIntersectionThreshold;
117
118 public DrawAction(MapFrame mapFrame) {
119 super(tr("Draw"), "node/autonode", tr("Draw nodes"),
120 Shortcut.registerShortcut("mapmode:draw", tr("Mode: {0}", tr("Draw")), KeyEvent.VK_A, Shortcut.DIRECT),
121 mapFrame, ImageProvider.getCursor("crosshair", null));
122
123 snappingShortcut = Shortcut.registerShortcut("mapmode:drawanglesnapping",
124 tr("Mode: Draw Angle snapping"), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
125 snapChangeAction = new SnapChangeAction();
126 snapCheckboxMenuItem = addMenuItem();
127 snapHelper.setMenuCheckBox(snapCheckboxMenuItem);
128 backspaceShortcut = Shortcut.registerShortcut("mapmode:backspace",
129 tr("Backspace in Add mode"), KeyEvent.VK_BACK_SPACE, Shortcut.DIRECT);
130 backspaceAction = new BackSpaceAction();
131 cursorJoinNode = ImageProvider.getCursor("crosshair", "joinnode");
132 cursorJoinWay = ImageProvider.getCursor("crosshair", "joinway");
133
134 readPreferences();
135 snapHelper.init();
136 }
137
138 private JCheckBoxMenuItem addMenuItem() {
139 int n=Main.main.menu.editMenu.getItemCount();
140 for (int i=n-1;i>0;i--) {
141 JMenuItem item = Main.main.menu.editMenu.getItem(i);
142 if (item!=null && item.getAction() !=null && item.getAction() instanceof SnapChangeAction) {
143 Main.main.menu.editMenu.remove(i);
144 }
145 }
146 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, snapChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
147 }
148
149 /**
150 * Checks if a map redraw is required and does so if needed. Also updates the status bar
151 */
152 private boolean redrawIfRequired() {
153 updateStatusLine();
154 // repaint required if the helper line is active.
155 boolean needsRepaint = drawHelperLine && !wayIsFinished;
156 if(drawTargetHighlight) {
157 // move newHighlights to oldHighlights; only update changed primitives
158 for(OsmPrimitive x : newHighlights) {
159 if(oldHighlights.contains(x)) {
160 continue;
161 }
162 x.setHighlighted(true);
163 needsRepaint = true;
164 }
165 oldHighlights.removeAll(newHighlights);
166 for(OsmPrimitive x : oldHighlights) {
167 x.setHighlighted(false);
168 needsRepaint = true;
169 }
170 }
171 // required in order to print correct help text
172 oldHighlights = newHighlights;
173
174 if (!needsRepaint && !drawTargetHighlight)
175 return false;
176
177 // update selection to reflect which way being modified
178 DataSet currentDataSet = getCurrentDataSet();
179 if (getCurrentBaseNode() != null && currentDataSet != null && !currentDataSet.getSelected().isEmpty()) {
180 Way continueFrom = getWayForNode(getCurrentBaseNode());
181 if (alt && continueFrom != null && (!getCurrentBaseNode().isSelected() || continueFrom.isSelected())) {
182 addRemoveSelection(currentDataSet, getCurrentBaseNode(), continueFrom);
183 needsRepaint = true;
184 } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
185 currentDataSet.addSelected(continueFrom);
186 needsRepaint = true;
187 }
188 }
189
190 if(needsRepaint) {
191 Main.map.mapView.repaint();
192 }
193 return needsRepaint;
194 }
195
196 private static void addRemoveSelection(DataSet ds, OsmPrimitive toAdd, OsmPrimitive toRemove) {
197 ds.beginUpdate(); // to prevent the selection listener to screw around with the state
198 ds.addSelected(toAdd);
199 ds.clearSelection(toRemove);
200 ds.endUpdate();
201 }
202
203 @Override
204 public void enterMode() {
205 if (!isEnabled())
206 return;
207 super.enterMode();
208 readPreferences();
209
210 // determine if selection is suitable to continue drawing. If it
211 // isn't, set wayIsFinished to true to avoid superfluous repaints.
212 determineCurrentBaseNodeAndPreviousNode(getCurrentDataSet().getSelected());
213 wayIsFinished = getCurrentBaseNode() == null;
214
215 toleranceMultiplier = 0.01 * NavigatableComponent.PROP_SNAP_DISTANCE.get();
216
217 snapHelper.init();
218 snapCheckboxMenuItem.getAction().setEnabled(true);
219
220 Main.map.statusLine.getAnglePanel().addMouseListener(snapHelper.anglePopupListener);
221 Main.registerActionShortcut(backspaceAction, backspaceShortcut);
222
223 Main.map.mapView.addMouseListener(this);
224 Main.map.mapView.addMouseMotionListener(this);
225 Main.map.mapView.addTemporaryLayer(this);
226 DataSet.addSelectionListener(this);
227
228 Main.map.keyDetector.addKeyListener(this);
229 Main.map.keyDetector.addModifierListener(this);
230 ignoreNextKeyRelease = true;
231 // would like to but haven't got mouse position yet:
232 // computeHelperLine(false, false, false);
233 }
234
235 private void readPreferences() {
236 rubberLineColor = Main.pref.getColor(marktr("helper line"), null);
237 if (rubberLineColor == null) rubberLineColor = PaintColors.SELECTED.get();
238
239 rubberLineStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.stroke.helper-line","3"));
240 drawHelperLine = Main.pref.getBoolean("draw.helper-line", true);
241 drawTargetHighlight = Main.pref.getBoolean("draw.target-highlight", true);
242 snapToIntersectionThreshold = Main.pref.getInteger("edit.snap-intersection-threshold",10);
243 }
244
245 @Override
246 public void exitMode() {
247 super.exitMode();
248 Main.map.mapView.removeMouseListener(this);
249 Main.map.mapView.removeMouseMotionListener(this);
250 Main.map.mapView.removeTemporaryLayer(this);
251 DataSet.removeSelectionListener(this);
252 Main.unregisterActionShortcut(backspaceAction, backspaceShortcut);
253 snapHelper.unsetFixedMode();
254 snapCheckboxMenuItem.getAction().setEnabled(false);
255
256 Main.map.statusLine.getAnglePanel().removeMouseListener(snapHelper.anglePopupListener);
257 Main.map.statusLine.activateAnglePanel(false);
258
259 removeHighlighting();
260 Main.map.keyDetector.removeKeyListener(this);
261 Main.map.keyDetector.removeModifierListener(this);
262
263 // when exiting we let everybody know about the currently selected
264 // primitives
265 //
266 DataSet ds = getCurrentDataSet();
267 if(ds != null) {
268 ds.fireSelectionChanged();
269 }
270 }
271
272 /**
273 * redraw to (possibly) get rid of helper line if selection changes.
274 */
275 @Override
276 public void modifiersChanged(int modifiers) {
277 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
278 return;
279 updateKeyModifiers(modifiers);
280 computeHelperLine();
281 addHighlighting();
282 }
283
284 @Override
285 public void doKeyPressed(KeyEvent e) {
286 if (!snappingShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
287 return;
288 snapHelper.setFixedMode();
289 computeHelperLine();
290 redrawIfRequired();
291 }
292
293 @Override
294 public void doKeyReleased(KeyEvent e) {
295 if (!snappingShortcut.isEvent(e) && !(useRepeatedShortcut && getShortcut().isEvent(e)))
296 return;
297 if (ignoreNextKeyRelease) {
298 ignoreNextKeyRelease = false;
299 return;
300 }
301 snapHelper.unFixOrTurnOff();
302 computeHelperLine();
303 redrawIfRequired();
304 }
305
306 /**
307 * redraw to (possibly) get rid of helper line if selection changes.
308 */
309 @Override
310 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
311 if(!Main.map.mapView.isActiveLayerDrawable())
312 return;
313 computeHelperLine();
314 addHighlighting();
315 }
316
317 private void tryAgain(MouseEvent e) {
318 getCurrentDataSet().setSelected();
319 mouseReleased(e);
320 }
321
322 /**
323 * This function should be called when the user wishes to finish his current draw action.
324 * If Potlatch Style is enabled, it will switch to select tool, otherwise simply disable
325 * the helper line until the user chooses to draw something else.
326 */
327 private void finishDrawing() {
328 // let everybody else know about the current selection
329 //
330 Main.main.getCurrentDataSet().fireSelectionChanged();
331 lastUsedNode = null;
332 wayIsFinished = true;
333 Main.map.selectSelectTool(true);
334 snapHelper.noSnapNow();
335
336 // Redraw to remove the helper line stub
337 computeHelperLine();
338 removeHighlighting();
339 }
340
341 private Point rightClickPressPos;
342
343 @Override
344 public void mousePressed(MouseEvent e) {
345 if (e.getButton() == MouseEvent.BUTTON3) {
346 rightClickPressPos = e.getPoint();
347 }
348 }
349
350 /**
351 * If user clicked with the left button, add a node at the current mouse
352 * position.
353 *
354 * If in nodeway mode, insert the node into the way.
355 */
356 @Override
357 public void mouseReleased(MouseEvent e) {
358 if (e.getButton() == MouseEvent.BUTTON3) {
359 Point curMousePos = e.getPoint();
360 if (curMousePos.equals(rightClickPressPos)) {
361 tryToSetBaseSegmentForAngleSnap();
362 }
363 return;
364 }
365 if (e.getButton() != MouseEvent.BUTTON1)
366 return;
367 if(!Main.map.mapView.isActiveLayerDrawable())
368 return;
369 // request focus in order to enable the expected keyboard shortcuts
370 //
371 Main.map.mapView.requestFocus();
372
373 if(e.getClickCount() > 1 && mousePos != null && mousePos.equals(oldMousePos)) {
374 // A double click equals "user clicked last node again, finish way"
375 // Change draw tool only if mouse position is nearly the same, as
376 // otherwise fast clicks will count as a double click
377 finishDrawing();
378 return;
379 }
380 oldMousePos = mousePos;
381
382 // we copy ctrl/alt/shift from the event just in case our global
383 // keyDetector didn't make it through the security manager. Unclear
384 // if that can ever happen but better be safe.
385 updateKeyModifiers(e);
386 mousePos = e.getPoint();
387
388 DataSet ds = getCurrentDataSet();
389 Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
390 Collection<Command> cmds = new LinkedList<>();
391 Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());
392
393 List<Way> reuseWays = new ArrayList<>(),
394 replacedWays = new ArrayList<>();
395 boolean newNode = false;
396 Node n = null;
397
398 n = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
399 if (ctrl) {
400 Iterator<Way> it = getCurrentDataSet().getSelectedWays().iterator();
401 if (it.hasNext()) {
402 // ctrl-click on node of selected way = reuse node despite of ctrl
403 if (!it.next().containsNode(n)) n = null;
404 } else {
405 n=null; // ctrl-click + no selected way = new node
406 }
407 }
408
409 if (n != null && !snapHelper.isActive()) {
410 // user clicked on node
411 if (selection.isEmpty() || wayIsFinished) {
412 // select the clicked node and do nothing else
413 // (this is just a convenience option so that people don't
414 // have to switch modes)
415
416 getCurrentDataSet().setSelected(n);
417 // If we extend/continue an existing way, select it already now to make it obvious
418 Way continueFrom = getWayForNode(n);
419 if (continueFrom != null) {
420 getCurrentDataSet().addSelected(continueFrom);
421 }
422
423 // The user explicitly selected a node, so let him continue drawing
424 wayIsFinished = false;
425 return;
426 }
427 } else {
428 EastNorth newEN;
429 if (n!=null) {
430 EastNorth foundPoint = n.getEastNorth();
431 // project found node to snapping line
432 newEN = snapHelper.getSnapPoint(foundPoint);
433 // do not add new node if there is some node within snapping distance
434 double tolerance = Main.map.mapView.getDist100Pixel() * toleranceMultiplier;
435 if (foundPoint.distance(newEN) > tolerance) {
436 n = new Node(newEN); // point != projected, so we create new node
437 newNode = true;
438 }
439 } else { // n==null, no node found in clicked area
440 EastNorth mouseEN = Main.map.mapView.getEastNorth(e.getX(), e.getY());
441 newEN = snapHelper.isSnapOn() ? snapHelper.getSnapPoint(mouseEN) : mouseEN;
442 n = new Node(newEN); //create node at clicked point
443 newNode = true;
444 }
445 snapHelper.unsetFixedMode();
446 }
447
448 if (newNode) {
449 if (n.getCoor().isOutSideWorld()) {
450 JOptionPane.showMessageDialog(
451 Main.parent,
452 tr("Cannot add a node outside of the world."),
453 tr("Warning"),
454 JOptionPane.WARNING_MESSAGE
455 );
456 return;
457 }
458 cmds.add(new AddCommand(n));
459
460 if (!ctrl) {
461 // Insert the node into all the nearby way segments
462 List<WaySegment> wss = Main.map.mapView.getNearestWaySegments(
463 Main.map.mapView.getPoint(n), OsmPrimitive.isSelectablePredicate);
464 if (snapHelper.isActive()) {
465 tryToMoveNodeOnIntersection(wss,n);
466 }
467 insertNodeIntoAllNearbySegments(wss, n, newSelection, cmds, replacedWays, reuseWays);
468 }
469 }
470 // now "n" is newly created or reused node that shoud be added to some way
471
472 // This part decides whether or not a "segment" (i.e. a connection) is made to an
473 // existing node.
474
475 // For a connection to be made, the user must either have a node selected (connection
476 // is made to that node), or he must have a way selected *and* one of the endpoints
477 // of that way must be the last used node (connection is made to last used node), or
478 // he must have a way and a node selected (connection is made to the selected node).
479
480 // If the above does not apply, the selection is cleared and a new try is started
481
482 boolean extendedWay = false;
483 boolean wayIsFinishedTemp = wayIsFinished;
484 wayIsFinished = false;
485
486 // don't draw lines if shift is held
487 if (!selection.isEmpty() && !shift) {
488 Node selectedNode = null;
489 Way selectedWay = null;
490
491 for (OsmPrimitive p : selection) {
492 if (p instanceof Node) {
493 if (selectedNode != null) {
494 // Too many nodes selected to do something useful
495 tryAgain(e);
496 return;
497 }
498 selectedNode = (Node) p;
499 } else if (p instanceof Way) {
500 if (selectedWay != null) {
501 // Too many ways selected to do something useful
502 tryAgain(e);
503 return;
504 }
505 selectedWay = (Way) p;
506 }
507 }
508
509 // the node from which we make a connection
510 Node n0 = findNodeToContinueFrom(selectedNode, selectedWay);
511 // We have a selection but it isn't suitable. Try again.
512 if(n0 == null) {
513 tryAgain(e);
514 return;
515 }
516 if(!wayIsFinishedTemp){
517 if(isSelfContainedWay(selectedWay, n0, n))
518 return;
519
520 // User clicked last node again, finish way
521 if(n0 == n) {
522 finishDrawing();
523 return;
524 }
525
526 // Ok we know now that we'll insert a line segment, but will it connect to an
527 // existing way or make a new way of its own? The "alt" modifier means that the
528 // user wants a new way.
529 Way way = alt ? null : (selectedWay != null) ? selectedWay : getWayForNode(n0);
530 Way wayToSelect;
531
532 // Don't allow creation of self-overlapping ways
533 if(way != null) {
534 int nodeCount=0;
535 for (Node p : way.getNodes())
536 if(p.equals(n0)) {
537 nodeCount++;
538 }
539 if(nodeCount > 1) {
540 way = null;
541 }
542 }
543
544 if (way == null) {
545 way = new Way();
546 way.addNode(n0);
547 cmds.add(new AddCommand(way));
548 wayToSelect = way;
549 } else {
550 int i;
551 if ((i = replacedWays.indexOf(way)) != -1) {
552 way = reuseWays.get(i);
553 wayToSelect = way;
554 } else {
555 wayToSelect = way;
556 Way wnew = new Way(way);
557 cmds.add(new ChangeCommand(way, wnew));
558 way = wnew;
559 }
560 }
561
562 // Connected to a node that's already in the way
563 if(way.containsNode(n)) {
564 wayIsFinished = true;
565 selection.clear();
566 }
567
568 // Add new node to way
569 if (way.getNode(way.getNodesCount() - 1) == n0) {
570 way.addNode(n);
571 } else {
572 way.addNode(0, n);
573 }
574
575 extendedWay = true;
576 newSelection.clear();
577 newSelection.add(wayToSelect);
578 }
579 }
580
581 String title;
582 if (!extendedWay) {
583 if (!newNode)
584 return; // We didn't do anything.
585 else if (reuseWays.isEmpty()) {
586 title = tr("Add node");
587 } else {
588 title = tr("Add node into way");
589 for (Way w : reuseWays) {
590 newSelection.remove(w);
591 }
592 }
593 newSelection.clear();
594 newSelection.add(n);
595 } else if (!newNode) {
596 title = tr("Connect existing way to node");
597 } else if (reuseWays.isEmpty()) {
598 title = tr("Add a new node to an existing way");
599 } else {
600 title = tr("Add node into way and connect");
601 }
602
603 Command c = new SequenceCommand(title, cmds);
604
605 Main.main.undoRedo.add(c);
606 if(!wayIsFinished) {
607 lastUsedNode = n;
608 }
609
610 getCurrentDataSet().setSelected(newSelection);
611
612 // "viewport following" mode for tracing long features
613 // from aerial imagery or GPS tracks.
614 if (n != null && Main.map.mapView.viewportFollowing) {
615 Main.map.mapView.smoothScrollTo(n.getEastNorth());
616 }
617 computeHelperLine();
618 removeHighlighting();
619 }
620
621 private void insertNodeIntoAllNearbySegments(List<WaySegment> wss, Node n, Collection<OsmPrimitive> newSelection, Collection<Command> cmds, List<Way> replacedWays, List<Way> reuseWays) {
622 Map<Way, List<Integer>> insertPoints = new HashMap<>();
623 for (WaySegment ws : wss) {
624 List<Integer> is;
625 if (insertPoints.containsKey(ws.way)) {
626 is = insertPoints.get(ws.way);
627 } else {
628 is = new ArrayList<>();
629 insertPoints.put(ws.way, is);
630 }
631
632 is.add(ws.lowerIndex);
633 }
634
635 Set<Pair<Node,Node>> segSet = new HashSet<>();
636
637 for (Map.Entry<Way, List<Integer>> insertPoint : insertPoints.entrySet()) {
638 Way w = insertPoint.getKey();
639 List<Integer> is = insertPoint.getValue();
640
641 Way wnew = new Way(w);
642
643 pruneSuccsAndReverse(is);
644 for (int i : is) {
645 segSet.add(Pair.sort(new Pair<>(w.getNode(i), w.getNode(i+1))));
646 }
647 for (int i : is) {
648 wnew.addNode(i + 1, n);
649 }
650
651 // If ALT is pressed, a new way should be created and that new way should get
652 // selected. This works everytime unless the ways the nodes get inserted into
653 // are already selected. This is the case when creating a self-overlapping way
654 // but pressing ALT prevents this. Therefore we must de-select the way manually
655 // here so /only/ the new way will be selected after this method finishes.
656 if(alt) {
657 newSelection.add(insertPoint.getKey());
658 }
659
660 cmds.add(new ChangeCommand(insertPoint.getKey(), wnew));
661 replacedWays.add(insertPoint.getKey());
662 reuseWays.add(wnew);
663 }
664
665 adjustNode(segSet, n);
666 }
667
668 /**
669 * Prevent creation of ways that look like this: &lt;----&gt;
670 * This happens if users want to draw a no-exit-sideway from the main way like this:
671 * ^
672 * |&lt;----&gt;
673 * |
674 * The solution isn't ideal because the main way will end in the side way, which is bad for
675 * navigation software ("drive straight on") but at least easier to fix. Maybe users will fix
676 * it on their own, too. At least it's better than producing an error.
677 *
678 * @param selectedWay the way to check
679 * @param currentNode the current node (i.e. the one the connection will be made from)
680 * @param targetNode the target node (i.e. the one the connection will be made to)
681 * @return {@code true} if this would create a selfcontaining way, {@code false} otherwise.
682 */
683 private boolean isSelfContainedWay(Way selectedWay, Node currentNode, Node targetNode) {
684 if(selectedWay != null) {
685 int posn0 = selectedWay.getNodes().indexOf(currentNode);
686 if( posn0 != -1 && // n0 is part of way
687 (posn0 >= 1 && targetNode.equals(selectedWay.getNode(posn0-1))) || // previous node
688 (posn0 < selectedWay.getNodesCount()-1) && targetNode.equals(selectedWay.getNode(posn0+1))) { // next node
689 getCurrentDataSet().setSelected(targetNode);
690 lastUsedNode = targetNode;
691 return true;
692 }
693 }
694
695 return false;
696 }
697
698 /**
699 * Finds a node to continue drawing from. Decision is based upon given node and way.
700 * @param selectedNode Currently selected node, may be null
701 * @param selectedWay Currently selected way, may be null
702 * @return Node if a suitable node is found, null otherwise
703 */
704 private Node findNodeToContinueFrom(Node selectedNode, Way selectedWay) {
705 // No nodes or ways have been selected, this occurs when a relation
706 // has been selected or the selection is empty
707 if(selectedNode == null && selectedWay == null)
708 return null;
709
710 if (selectedNode == null) {
711 if (selectedWay.isFirstLastNode(lastUsedNode))
712 return lastUsedNode;
713
714 // We have a way selected, but no suitable node to continue from. Start anew.
715 return null;
716 }
717
718 if (selectedWay == null)
719 return selectedNode;
720
721 if (selectedWay.isFirstLastNode(selectedNode))
722 return selectedNode;
723
724 // We have a way and node selected, but it's not at the start/end of the way. Start anew.
725 return null;
726 }
727
728 @Override
729 public void mouseDragged(MouseEvent e) {
730 mouseMoved(e);
731 }
732
733 @Override
734 public void mouseMoved(MouseEvent e) {
735 if(!Main.map.mapView.isActiveLayerDrawable())
736 return;
737
738 // we copy ctrl/alt/shift from the event just in case our global
739 // keyDetector didn't make it through the security manager. Unclear
740 // if that can ever happen but better be safe.
741 updateKeyModifiers(e);
742 mousePos = e.getPoint();
743 if (snapHelper.isSnapOn() && ctrl)
744 tryToSetBaseSegmentForAngleSnap();
745
746 computeHelperLine();
747 addHighlighting();
748 }
749
750 /**
751 * This method is used to detect segment under mouse and use it as reference for angle snapping
752 */
753 private void tryToSetBaseSegmentForAngleSnap() {
754 WaySegment seg = Main.map.mapView.getNearestWaySegment(mousePos, OsmPrimitive.isSelectablePredicate);
755 if (seg!=null) {
756 snapHelper.setBaseSegment(seg);
757 }
758 }
759
760 /**
761 * This method prepares data required for painting the "helper line" from
762 * the last used position to the mouse cursor. It duplicates some code from
763 * mouseReleased() (FIXME).
764 */
765 private void computeHelperLine() {
766 MapView mv = Main.map.mapView;
767 if (mousePos == null) {
768 // Don't draw the line.
769 currentMouseEastNorth = null;
770 currentBaseNode = null;
771 return;
772 }
773
774 Collection<OsmPrimitive> selection = getCurrentDataSet().getSelected();
775
776 Node currentMouseNode = null;
777 mouseOnExistingNode = null;
778 mouseOnExistingWays = new HashSet<>();
779
780 showStatusInfo(-1, -1, -1, snapHelper.isSnapOn());
781
782 if (!ctrl && mousePos != null) {
783 currentMouseNode = mv.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
784 }
785
786 // We need this for highlighting and we'll only do so if we actually want to re-use
787 // *and* there is no node nearby (because nodes beat ways when re-using)
788 if(!ctrl && currentMouseNode == null) {
789 List<WaySegment> wss = mv.getNearestWaySegments(mousePos, OsmPrimitive.isSelectablePredicate);
790 for(WaySegment ws : wss) {
791 mouseOnExistingWays.add(ws.way);
792 }
793 }
794
795 if (currentMouseNode != null) {
796 // user clicked on node
797 if (selection.isEmpty()) return;
798 currentMouseEastNorth = currentMouseNode.getEastNorth();
799 mouseOnExistingNode = currentMouseNode;
800 } else {
801 // no node found in clicked area
802 currentMouseEastNorth = mv.getEastNorth(mousePos.x, mousePos.y);
803 }
804
805 determineCurrentBaseNodeAndPreviousNode(selection);
806 if (previousNode == null) {
807 snapHelper.noSnapNow();
808 }
809
810 if (getCurrentBaseNode() == null || getCurrentBaseNode() == currentMouseNode)
811 return; // Don't create zero length way segments.
812
813
814 double curHdg = Math.toDegrees(getCurrentBaseNode().getEastNorth()
815 .heading(currentMouseEastNorth));
816 double baseHdg=-1;
817 if (previousNode != null) {
818 baseHdg = Math.toDegrees(previousNode.getEastNorth()
819 .heading(getCurrentBaseNode().getEastNorth()));
820 }
821
822 snapHelper.checkAngleSnapping(currentMouseEastNorth,baseHdg, curHdg);
823
824 // status bar was filled by snapHelper
825 }
826
827 private void showStatusInfo(double angle, double hdg, double distance, boolean activeFlag) {
828 Main.map.statusLine.setAngle(angle);
829 Main.map.statusLine.activateAnglePanel(activeFlag);
830 Main.map.statusLine.setHeading(hdg);
831 Main.map.statusLine.setDist(distance);
832 }
833
834 /**
835 * Helper function that sets fields currentBaseNode and previousNode
836 * @param selection
837 * uses also lastUsedNode field
838 */
839 private void determineCurrentBaseNodeAndPreviousNode(Collection<OsmPrimitive> selection) {
840 Node selectedNode = null;
841 Way selectedWay = null;
842 for (OsmPrimitive p : selection) {
843 if (p instanceof Node) {
844 if (selectedNode != null)
845 return;
846 selectedNode = (Node) p;
847 } else if (p instanceof Way) {
848 if (selectedWay != null)
849 return;
850 selectedWay = (Way) p;
851 }
852 }
853 // we are here, if not more than 1 way or node is selected,
854
855 // the node from which we make a connection
856 currentBaseNode = null;
857 previousNode = null;
858
859 // Try to find an open way to measure angle from it. The way is not to be continued!
860 // warning: may result in changes of currentBaseNode and previousNode
861 // please remove if bugs arise
862 if (selectedWay == null && selectedNode != null) {
863 for (OsmPrimitive p: selectedNode.getReferrers()) {
864 if (p.isUsable() && p instanceof Way && ((Way) p).isFirstLastNode(selectedNode)) {
865 if (selectedWay!=null) { // two uncontinued ways, nothing to take as reference
866 selectedWay=null;
867 break;
868 } else {
869 // set us ~continue this way (measure angle from it)
870 selectedWay = (Way) p;
871 }
872 }
873 }
874 }
875
876 if (selectedNode == null) {
877 if (selectedWay == null)
878 return;
879 continueWayFromNode(selectedWay, lastUsedNode);
880 } else if (selectedWay == null) {
881 currentBaseNode = selectedNode;
882 } else if (!selectedWay.isDeleted()) { // fix #7118
883 continueWayFromNode(selectedWay, selectedNode);
884 }
885 }
886
887 /**
888 * if one of the ends of @param way is given @param node ,
889 * then set currentBaseNode = node and previousNode = adjacent node of way
890 */
891 private void continueWayFromNode(Way way, Node node) {
892 int n = way.getNodesCount();
893 if (node == way.firstNode()){
894 currentBaseNode = node;
895 if (n>1) previousNode = way.getNode(1);
896 } else if (node == way.lastNode()) {
897 currentBaseNode = node;
898 if (n>1) previousNode = way.getNode(n-2);
899 }
900 }
901
902 /**
903 * Repaint on mouse exit so that the helper line goes away.
904 */
905 @Override
906 public void mouseExited(MouseEvent e) {
907 if(!Main.map.mapView.isActiveLayerDrawable())
908 return;
909 mousePos = e.getPoint();
910 snapHelper.noSnapNow();
911 boolean repaintIssued = removeHighlighting();
912 // force repaint in case snapHelper needs one. If removeHighlighting
913 // caused one already, don’t do it again.
914 if(!repaintIssued) {
915 Main.map.mapView.repaint();
916 }
917 }
918
919 /**
920 * @return If the node is the end of exactly one way, return this.
921 * <code>null</code> otherwise.
922 */
923 public static Way getWayForNode(Node n) {
924 Way way = null;
925 for (Way w : Utils.filteredCollection(n.getReferrers(), Way.class)) {
926 if (!w.isUsable() || w.getNodesCount() < 1) {
927 continue;
928 }
929 Node firstNode = w.getNode(0);
930 Node lastNode = w.getNode(w.getNodesCount() - 1);
931 if ((firstNode == n || lastNode == n) && (firstNode != lastNode)) {
932 if (way != null)
933 return null;
934 way = w;
935 }
936 }
937 return way;
938 }
939
940 /**
941 * Replies the current base node, after having checked it is still usable (see #11105).
942 * @return the current base node (can be null). If not-null, it's guaranteed the node is usable
943 */
944 public Node getCurrentBaseNode() {
945 if (currentBaseNode != null && (currentBaseNode.getDataSet() == null || !currentBaseNode.isUsable())) {
946 currentBaseNode = null;
947 }
948 return currentBaseNode;
949 }
950
951 private static void pruneSuccsAndReverse(List<Integer> is) {
952 HashSet<Integer> is2 = new HashSet<>();
953 for (int i : is) {
954 if (!is2.contains(i - 1) && !is2.contains(i + 1)) {
955 is2.add(i);
956 }
957 }
958 is.clear();
959 is.addAll(is2);
960 Collections.sort(is);
961 Collections.reverse(is);
962 }
963
964 /**
965 * Adjusts the position of a node to lie on a segment (or a segment
966 * intersection).
967 *
968 * If one or more than two segments are passed, the node is adjusted
969 * to lie on the first segment that is passed.
970 *
971 * If two segments are passed, the node is adjusted to be at their
972 * intersection.
973 *
974 * No action is taken if no segments are passed.
975 *
976 * @param segs the segments to use as a reference when adjusting
977 * @param n the node to adjust
978 */
979 private static void adjustNode(Collection<Pair<Node,Node>> segs, Node n) {
980
981 switch (segs.size()) {
982 case 0:
983 return;
984 case 2:
985 // This computes the intersection between
986 // the two segments and adjusts the node position.
987 Iterator<Pair<Node,Node>> i = segs.iterator();
988 Pair<Node,Node> seg = i.next();
989 EastNorth A = seg.a.getEastNorth();
990 EastNorth B = seg.b.getEastNorth();
991 seg = i.next();
992 EastNorth C = seg.a.getEastNorth();
993 EastNorth D = seg.b.getEastNorth();
994
995 double u=det(B.east() - A.east(), B.north() - A.north(), C.east() - D.east(), C.north() - D.north());
996
997 // Check for parallel segments and do nothing if they are
998 // In practice this will probably only happen when a way has been duplicated
999
1000 if (u == 0)
1001 return;
1002
1003 // q is a number between 0 and 1
1004 // It is the point in the segment where the intersection occurs
1005 // if the segment is scaled to lenght 1
1006
1007 double q = det(B.north() - C.north(), B.east() - C.east(), D.north() - C.north(), D.east() - C.east()) / u;
1008 EastNorth intersection = new EastNorth(
1009 B.east() + q * (A.east() - B.east()),
1010 B.north() + q * (A.north() - B.north()));
1011
1012
1013 // only adjust to intersection if within snapToIntersectionThreshold pixel of mouse click; otherwise
1014 // fall through to default action.
1015 // (for semi-parallel lines, intersection might be miles away!)
1016 if (Main.map.mapView.getPoint2D(n).distance(Main.map.mapView.getPoint2D(intersection)) < snapToIntersectionThreshold) {
1017 n.setEastNorth(intersection);
1018 return;
1019 }
1020 default:
1021 EastNorth P = n.getEastNorth();
1022 seg = segs.iterator().next();
1023 A = seg.a.getEastNorth();
1024 B = seg.b.getEastNorth();
1025 double a = P.distanceSq(B);
1026 double b = P.distanceSq(A);
1027 double c = A.distanceSq(B);
1028 q = (a - b + c) / (2*c);
1029 n.setEastNorth(new EastNorth(B.east() + q * (A.east() - B.east()), B.north() + q * (A.north() - B.north())));
1030 }
1031 }
1032
1033 // helper for adjustNode
1034 static double det(double a, double b, double c, double d) {
1035 return a * d - b * c;
1036 }
1037
1038 private void tryToMoveNodeOnIntersection(List<WaySegment> wss, Node n) {
1039 if (wss.isEmpty())
1040 return;
1041 WaySegment ws = wss.get(0);
1042 EastNorth p1=ws.getFirstNode().getEastNorth();
1043 EastNorth p2=ws.getSecondNode().getEastNorth();
1044 if (snapHelper.dir2 != null && getCurrentBaseNode() != null) {
1045 EastNorth xPoint = Geometry.getSegmentSegmentIntersection(p1, p2, snapHelper.dir2,
1046 getCurrentBaseNode().getEastNorth());
1047 if (xPoint!=null) {
1048 n.setEastNorth(xPoint);
1049 }
1050 }
1051 }
1052 /**
1053 * Takes the data from computeHelperLine to determine which ways/nodes should be highlighted
1054 * (if feature enabled). Also sets the target cursor if appropriate. It adds the to-be-
1055 * highlighted primitives to newHighlights but does not actually highlight them. This work is
1056 * done in redrawIfRequired. This means, calling addHighlighting() without redrawIfRequired()
1057 * will leave the data in an inconsistent state.
1058 *
1059 * The status bar derives its information from oldHighlights, so in order to update the status
1060 * bar both addHighlighting() and repaintIfRequired() are needed, since former fills newHighlights
1061 * and latter processes them into oldHighlights.
1062 */
1063 private void addHighlighting() {
1064 newHighlights = new HashSet<>();
1065
1066 // if ctrl key is held ("no join"), don't highlight anything
1067 if (ctrl) {
1068 Main.map.mapView.setNewCursor(cursor, this);
1069 redrawIfRequired();
1070 return;
1071 }
1072
1073 // This happens when nothing is selected, but we still want to highlight the "target node"
1074 if (mouseOnExistingNode == null && getCurrentDataSet().getSelected().isEmpty()
1075 && mousePos != null) {
1076 mouseOnExistingNode = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive.isSelectablePredicate);
1077 }
1078
1079 if (mouseOnExistingNode != null) {
1080 Main.map.mapView.setNewCursor(cursorJoinNode, this);
1081 newHighlights.add(mouseOnExistingNode);
1082 redrawIfRequired();
1083 return;
1084 }
1085
1086 // Insert the node into all the nearby way segments
1087 if (mouseOnExistingWays.isEmpty()) {
1088 Main.map.mapView.setNewCursor(cursor, this);
1089 redrawIfRequired();
1090 return;
1091 }
1092
1093 Main.map.mapView.setNewCursor(cursorJoinWay, this);
1094 newHighlights.addAll(mouseOnExistingWays);
1095 redrawIfRequired();
1096 }
1097
1098 /**
1099 * Removes target highlighting from primitives. Issues repaint if required.
1100 * Returns true if a repaint has been issued.
1101 */
1102 private boolean removeHighlighting() {
1103 newHighlights = new HashSet<>();
1104 return redrawIfRequired();
1105 }
1106
1107 @Override
1108 public void paint(Graphics2D g, MapView mv, Bounds box) {
1109 // sanity checks
1110 if (Main.map.mapView == null || mousePos == null
1111 // don't draw line if we don't know where from or where to
1112 || getCurrentBaseNode() == null || currentMouseEastNorth == null
1113 // don't draw line if mouse is outside window
1114 || !Main.map.mapView.getBounds().contains(mousePos))
1115 return;
1116
1117 Graphics2D g2 = g;
1118 snapHelper.drawIfNeeded(g2,mv);
1119 if (!drawHelperLine || wayIsFinished || shift)
1120 return;
1121
1122 if (!snapHelper.isActive()) { // else use color and stoke from snapHelper.draw
1123 g2.setColor(rubberLineColor);
1124 g2.setStroke(rubberLineStroke);
1125 } else if (!snapHelper.drawConstructionGeometry)
1126 return;
1127 GeneralPath b = new GeneralPath();
1128 Point p1=mv.getPoint(getCurrentBaseNode());
1129 Point p2=mv.getPoint(currentMouseEastNorth);
1130
1131 double t = Math.atan2(p2.y-p1.y, p2.x-p1.x) + Math.PI;
1132
1133 b.moveTo(p1.x,p1.y); b.lineTo(p2.x, p2.y);
1134
1135 // if alt key is held ("start new way"), draw a little perpendicular line
1136 if (alt) {
1137 b.moveTo((int)(p1.x + 8*Math.cos(t+PHI)), (int)(p1.y + 8*Math.sin(t+PHI)));
1138 b.lineTo((int)(p1.x + 8*Math.cos(t-PHI)), (int)(p1.y + 8*Math.sin(t-PHI)));
1139 }
1140
1141 g2.draw(b);
1142 g2.setStroke(BASIC_STROKE);
1143 }
1144
1145 @Override
1146 public String getModeHelpText() {
1147 StringBuilder rv;
1148 /*
1149 * No modifiers: all (Connect, Node Re-Use, Auto-Weld)
1150 * CTRL: disables node re-use, auto-weld
1151 * Shift: do not make connection
1152 * ALT: make connection but start new way in doing so
1153 */
1154
1155 /*
1156 * Status line text generation is split into two parts to keep it maintainable.
1157 * First part looks at what will happen to the new node inserted on click and
1158 * the second part will look if a connection is made or not.
1159 *
1160 * Note that this help text is not absolutely accurate as it doesn't catch any special
1161 * cases (e.g. when preventing <---> ways). The only special that it catches is when
1162 * a way is about to be finished.
1163 *
1164 * First check what happens to the new node.
1165 */
1166
1167 // oldHighlights stores the current highlights. If this
1168 // list is empty we can assume that we won't do any joins
1169 if (ctrl || oldHighlights.isEmpty()) {
1170 rv = new StringBuilder(tr("Create new node."));
1171 } else {
1172 // oldHighlights may store a node or way, check if it's a node
1173 OsmPrimitive x = oldHighlights.iterator().next();
1174 if (x instanceof Node) {
1175 rv = new StringBuilder(tr("Select node under cursor."));
1176 } else {
1177 rv = new StringBuilder(trn("Insert new node into way.", "Insert new node into {0} ways.",
1178 oldHighlights.size(), oldHighlights.size()));
1179 }
1180 }
1181
1182 /*
1183 * Check whether a connection will be made
1184 */
1185 if (getCurrentBaseNode() != null && !wayIsFinished) {
1186 if (alt) {
1187 rv.append(" ").append(tr("Start new way from last node."));
1188 } else {
1189 rv.append(" ").append(tr("Continue way from last node."));
1190 }
1191 if (snapHelper.isSnapOn()) {
1192 rv.append(" ").append(tr("Angle snapping active."));
1193 }
1194 }
1195
1196 Node n = mouseOnExistingNode;
1197 /*
1198 * Handle special case: Highlighted node == selected node => finish drawing
1199 */
1200 if (n != null && getCurrentDataSet() != null && getCurrentDataSet().getSelectedNodes().contains(n)) {
1201 if (wayIsFinished) {
1202 rv = new StringBuilder(tr("Select node under cursor."));
1203 } else {
1204 rv = new StringBuilder(tr("Finish drawing."));
1205 }
1206 }
1207
1208 /*
1209 * Handle special case: Self-Overlapping or closing way
1210 */
1211 if (getCurrentDataSet() != null && !getCurrentDataSet().getSelectedWays().isEmpty() && !wayIsFinished && !alt) {
1212 Way w = getCurrentDataSet().getSelectedWays().iterator().next();
1213 for (Node m : w.getNodes()) {
1214 if (m.equals(mouseOnExistingNode) || mouseOnExistingWays.contains(w)) {
1215 rv.append(" ").append(tr("Finish drawing."));
1216 break;
1217 }
1218 }
1219 }
1220 return rv.toString();
1221 }
1222
1223 /**
1224 * Get selected primitives, while draw action is in progress.
1225 *
1226 * While drawing a way, technically the last node is selected.
1227 * This is inconvenient when the user tries to add/edit tags to the way.
1228 * For this case, this method returns the current way as selection,
1229 * to work around this issue.
1230 * Otherwise the normal selection of the current data layer is returned.
1231 */
1232 public Collection<OsmPrimitive> getInProgressSelection() {
1233 DataSet ds = getCurrentDataSet();
1234 if (ds == null) return null;
1235 if (getCurrentBaseNode() != null && !ds.getSelected().isEmpty()) {
1236 Way continueFrom = getWayForNode(getCurrentBaseNode());
1237 if (continueFrom != null)
1238 return Collections.<OsmPrimitive>singleton(continueFrom);
1239 }
1240 return ds.getSelected();
1241 }
1242
1243 @Override
1244 public boolean layerIsSupported(Layer l) {
1245 return l instanceof OsmDataLayer;
1246 }
1247
1248 @Override
1249 protected void updateEnabledState() {
1250 setEnabled(getEditLayer() != null);
1251 }
1252
1253 @Override
1254 public void destroy() {
1255 super.destroy();
1256 snapChangeAction.destroy();
1257 }
1258
1259 public class BackSpaceAction extends AbstractAction {
1260
1261 @Override
1262 public void actionPerformed(ActionEvent e) {
1263 Main.main.undoRedo.undo();
1264 Node n=null;
1265 Command lastCmd=Main.main.undoRedo.commands.peekLast();
1266 if (lastCmd==null) return;
1267 for (OsmPrimitive p: lastCmd.getParticipatingPrimitives()) {
1268 if (p instanceof Node) {
1269 if (n==null) {
1270 n=(Node) p; // found one node
1271 wayIsFinished=false;
1272 } else {
1273 // if more than 1 node were affected by previous command,
1274 // we have no way to continue, so we forget about found node
1275 n=null;
1276 break;
1277 }
1278 }
1279 }
1280 // select last added node - maybe we will continue drawing from it
1281 if (n!=null) {
1282 getCurrentDataSet().addSelected(n);
1283 }
1284 }
1285 }
1286
1287 private class SnapHelper {
1288 private boolean snapOn; // snapping is turned on
1289
1290 private boolean active; // snapping is active for current mouse position
1291 private boolean fixed; // snap angle is fixed
1292 private boolean absoluteFix; // snap angle is absolute
1293
1294 private boolean drawConstructionGeometry;
1295 private boolean showProjectedPoint;
1296 private boolean showAngle;
1297
1298 private boolean snapToProjections;
1299
1300 private EastNorth dir2;
1301 private EastNorth projected;
1302 private String labelText;
1303 private double lastAngle;
1304
1305 private double customBaseHeading=-1; // angle of base line, if not last segment)
1306 private EastNorth segmentPoint1; // remembered first point of base segment
1307 private EastNorth segmentPoint2; // remembered second point of base segment
1308 private EastNorth projectionSource; // point that we are projecting to the line
1309
1310 private double[] snapAngles;
1311 private double snapAngleTolerance;
1312
1313 private double pe,pn; // (pe,pn) - direction of snapping line
1314 private double e0,n0; // (e0,n0) - origin of snapping line
1315
1316 private final String fixFmt="%d "+tr("FIX");
1317 private Color snapHelperColor;
1318 private Color highlightColor;
1319
1320 private Stroke normalStroke;
1321 private Stroke helperStroke;
1322 private Stroke highlightStroke;
1323
1324 private JCheckBoxMenuItem checkBox;
1325 public final Color ORANGE_TRANSPARENT = new Color(Color.ORANGE.getRed(),Color.ORANGE.getGreen(),Color.ORANGE.getBlue(),128);
1326
1327 public void init() {
1328 snapOn=false;
1329 checkBox.setState(snapOn);
1330 fixed=false; absoluteFix=false;
1331
1332 Collection<String> angles = Main.pref.getCollection("draw.anglesnap.angles",
1333 Arrays.asList("0","30","45","60","90","120","135","150","180"));
1334
1335 snapAngles = new double[2*angles.size()];
1336 int i=0;
1337 for (String s: angles) {
1338 try {
1339 snapAngles[i] = Double.parseDouble(s); i++;
1340 snapAngles[i] = 360-Double.parseDouble(s); i++;
1341 } catch (NumberFormatException e) {
1342 Main.warn("Incorrect number in draw.anglesnap.angles preferences: "+s);
1343 snapAngles[i]=0;i++;
1344 snapAngles[i]=0;i++;
1345 }
1346 }
1347 snapAngleTolerance = Main.pref.getDouble("draw.anglesnap.tolerance", 5.0);
1348 drawConstructionGeometry = Main.pref.getBoolean("draw.anglesnap.drawConstructionGeometry", true);
1349 showProjectedPoint = Main.pref.getBoolean("draw.anglesnap.drawProjectedPoint", true);
1350 snapToProjections = Main.pref.getBoolean("draw.anglesnap.projectionsnap", true);
1351
1352 showAngle = Main.pref.getBoolean("draw.anglesnap.showAngle", true);
1353 useRepeatedShortcut = Main.pref.getBoolean("draw.anglesnap.toggleOnRepeatedA", true);
1354
1355 normalStroke = rubberLineStroke;
1356 snapHelperColor = Main.pref.getColor(marktr("draw angle snap"), Color.ORANGE);
1357
1358 highlightColor = Main.pref.getColor(marktr("draw angle snap highlight"), ORANGE_TRANSPARENT);
1359 highlightStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.anglesnap.stroke.highlight","10"));
1360 helperStroke = GuiHelper.getCustomizedStroke(Main.pref.get("draw.anglesnap.stroke.helper","1 4"));
1361 }
1362
1363 public void saveAngles(String ... angles) {
1364 Main.pref.putCollection("draw.anglesnap.angles", Arrays.asList(angles));
1365 }
1366
1367 public void setMenuCheckBox(JCheckBoxMenuItem checkBox) {
1368 this.checkBox = checkBox;
1369 }
1370
1371 public void drawIfNeeded(Graphics2D g2, MapView mv) {
1372 if (!snapOn || !active)
1373 return;
1374 Point p1=mv.getPoint(getCurrentBaseNode());
1375 Point p2=mv.getPoint(dir2);
1376 Point p3=mv.getPoint(projected);
1377 GeneralPath b;
1378 if (drawConstructionGeometry) {
1379 g2.setColor(snapHelperColor);
1380 g2.setStroke(helperStroke);
1381
1382 b = new GeneralPath();
1383 if (absoluteFix) {
1384 b.moveTo(p2.x,p2.y);
1385 b.lineTo(2*p1.x-p2.x,2*p1.y-p2.y); // bi-directional line
1386 } else {
1387 b.moveTo(p2.x,p2.y);
1388 b.lineTo(p3.x,p3.y);
1389 }
1390 g2.draw(b);
1391 }
1392 if (projectionSource != null) {
1393 g2.setColor(snapHelperColor);
1394 g2.setStroke(helperStroke);
1395 b = new GeneralPath();
1396 b.moveTo(p3.x,p3.y);
1397 Point pp=mv.getPoint(projectionSource);
1398 b.lineTo(pp.x,pp.y);
1399 g2.draw(b);
1400 }
1401
1402 if (customBaseHeading >= 0) {
1403 g2.setColor(highlightColor);
1404 g2.setStroke(highlightStroke);
1405 b = new GeneralPath();
1406 Point pp1=mv.getPoint(segmentPoint1);
1407 Point pp2=mv.getPoint(segmentPoint2);
1408 b.moveTo(pp1.x,pp1.y);
1409 b.lineTo(pp2.x,pp2.y);
1410 g2.draw(b);
1411 }
1412
1413 g2.setColor(rubberLineColor);
1414 g2.setStroke(normalStroke);
1415 b = new GeneralPath();
1416 b.moveTo(p1.x,p1.y);
1417 b.lineTo(p3.x,p3.y);
1418 g2.draw(b);
1419
1420 g2.drawString(labelText, p3.x-5, p3.y+20);
1421 if (showProjectedPoint) {
1422 g2.setStroke(normalStroke);
1423 g2.drawOval(p3.x-5, p3.y-5, 10, 10); // projected point
1424 }
1425
1426 g2.setColor(snapHelperColor);
1427 g2.setStroke(helperStroke);
1428 }
1429
1430 /* If mouse position is close to line at 15-30-45-... angle, remembers this direction
1431 */
1432 public void checkAngleSnapping(EastNorth currentEN, double baseHeading, double curHeading) {
1433 EastNorth p0 = getCurrentBaseNode().getEastNorth();
1434 EastNorth snapPoint = currentEN;
1435 double angle = -1;
1436
1437 double activeBaseHeading = (customBaseHeading>=0)? customBaseHeading : baseHeading;
1438
1439 if (snapOn && (activeBaseHeading>=0)) {
1440 angle = curHeading - activeBaseHeading;
1441 if (angle < 0) {
1442 angle+=360;
1443 }
1444 if (angle > 360) {
1445 angle=0;
1446 }
1447
1448 double nearestAngle;
1449 if (fixed) {
1450 nearestAngle = lastAngle; // if direction is fixed use previous angle
1451 active = true;
1452 } else {
1453 nearestAngle = getNearestAngle(angle);
1454 if (getAngleDelta(nearestAngle, angle) < snapAngleTolerance) {
1455 active = (customBaseHeading>=0)? true : Math.abs(nearestAngle - 180) > 1e-3;
1456 // if angle is to previous segment, exclude 180 degrees
1457 lastAngle = nearestAngle;
1458 } else {
1459 active=false;
1460 }
1461 }
1462
1463 if (active) {
1464 double phi;
1465 e0 = p0.east();
1466 n0 = p0.north();
1467 buildLabelText((nearestAngle<=180) ? nearestAngle : nearestAngle-360);
1468
1469 phi = (nearestAngle + activeBaseHeading) * Math.PI / 180;
1470 // (pe,pn) - direction of snapping line
1471 pe = Math.sin(phi);
1472 pn = Math.cos(phi);
1473 double scale = 20 * Main.map.mapView.getDist100Pixel();
1474 dir2 = new EastNorth(e0 + scale * pe, n0 + scale * pn);
1475 snapPoint = getSnapPoint(currentEN);
1476 } else {
1477 noSnapNow();
1478 }
1479 }
1480
1481 // find out the distance, in metres, between the base point and projected point
1482 LatLon mouseLatLon = Main.map.mapView.getProjection().eastNorth2latlon(snapPoint);
1483 double distance = getCurrentBaseNode().getCoor().greatCircleDistance(mouseLatLon);
1484 double hdg = Math.toDegrees(p0.heading(snapPoint));
1485 // heading of segment from current to calculated point, not to mouse position
1486
1487 if (baseHeading >=0 ) { // there is previous line segment with some heading
1488 angle = hdg - baseHeading;
1489 if (angle < 0) {
1490 angle+=360;
1491 }
1492 if (angle > 360) {
1493 angle=0;
1494 }
1495 }
1496 showStatusInfo(angle, hdg, distance, isSnapOn());
1497 }
1498
1499 private void buildLabelText(double nearestAngle) {
1500 if (showAngle) {
1501 if (fixed) {
1502 if (absoluteFix) {
1503 labelText = "=";
1504 } else {
1505 labelText = String.format(fixFmt, (int) nearestAngle);
1506 }
1507 } else {
1508 labelText = String.format("%d", (int) nearestAngle);
1509 }
1510 } else {
1511 if (fixed) {
1512 if (absoluteFix) {
1513 labelText = "=";
1514 } else {
1515 labelText = String.format(tr("FIX"), 0);
1516 }
1517 } else {
1518 labelText = "";
1519 }
1520 }
1521 }
1522
1523 public EastNorth getSnapPoint(EastNorth p) {
1524 if (!active)
1525 return p;
1526 double de=p.east()-e0;
1527 double dn=p.north()-n0;
1528 double l = de*pe+dn*pn;
1529 double delta = Main.map.mapView.getDist100Pixel()/20;
1530 if (!absoluteFix && l<delta) {
1531 active=false;
1532 return p;
1533 } // do not go backward!
1534
1535 projectionSource=null;
1536 if (snapToProjections) {
1537 DataSet ds = getCurrentDataSet();
1538 Collection<Way> selectedWays = ds.getSelectedWays();
1539 if (selectedWays.size()==1) {
1540 Way w = selectedWays.iterator().next();
1541 Collection <EastNorth> pointsToProject = new ArrayList<>();
1542 if (w.getNodesCount()<1000) {
1543 for (Node n: w.getNodes()) {
1544 pointsToProject.add(n.getEastNorth());
1545 }
1546 }
1547 if (customBaseHeading >=0 ) {
1548 pointsToProject.add(segmentPoint1);
1549 pointsToProject.add(segmentPoint2);
1550 }
1551 EastNorth enOpt=null;
1552 double dOpt=1e5;
1553 for (EastNorth en: pointsToProject) { // searching for besht projection
1554 double l1 = (en.east()-e0)*pe+(en.north()-n0)*pn;
1555 double d1 = Math.abs(l1-l);
1556 if (d1 < delta && d1 < dOpt) {
1557 l=l1;
1558 enOpt = en;
1559 dOpt = d1;
1560 }
1561 }
1562 if (enOpt!=null) {
1563 projectionSource = enOpt;
1564 }
1565 }
1566 }
1567 return projected = new EastNorth(e0+l*pe, n0+l*pn);
1568 }
1569
1570
1571 public void noSnapNow() {
1572 active=false;
1573 dir2=null; projected=null;
1574 labelText=null;
1575 }
1576
1577 public void setBaseSegment(WaySegment seg) {
1578 if (seg==null) return;
1579 segmentPoint1=seg.getFirstNode().getEastNorth();
1580 segmentPoint2=seg.getSecondNode().getEastNorth();
1581
1582 double hdg = segmentPoint1.heading(segmentPoint2);
1583 hdg=Math.toDegrees(hdg);
1584 if (hdg<0) {
1585 hdg+=360;
1586 }
1587 if (hdg>360) {
1588 hdg-=360;
1589 }
1590 customBaseHeading=hdg;
1591 }
1592
1593 private void nextSnapMode() {
1594 if (snapOn) {
1595 // turn off snapping if we are in fixed mode or no actile snapping line exist
1596 if (fixed || !active) { snapOn=false; unsetFixedMode(); } else {
1597 setFixedMode();
1598 }
1599 } else {
1600 snapOn=true;
1601 unsetFixedMode();
1602 }
1603 checkBox.setState(snapOn);
1604 customBaseHeading=-1;
1605 }
1606
1607 private void enableSnapping() {
1608 snapOn = true;
1609 checkBox.setState(snapOn);
1610 customBaseHeading=-1;
1611 unsetFixedMode();
1612 }
1613
1614 private void toggleSnapping() {
1615 snapOn = !snapOn;
1616 checkBox.setState(snapOn);
1617 customBaseHeading=-1;
1618 unsetFixedMode();
1619 }
1620
1621 public void setFixedMode() {
1622 if (active) {
1623 fixed=true;
1624 }
1625 }
1626
1627
1628 public void unsetFixedMode() {
1629 fixed=false;
1630 absoluteFix=false;
1631 lastAngle=0;
1632 active=false;
1633 }
1634
1635 public boolean isActive() {
1636 return active;
1637 }
1638
1639 public boolean isSnapOn() {
1640 return snapOn;
1641 }
1642
1643 private double getNearestAngle(double angle) {
1644 double delta,minDelta=1e5, bestAngle=0.0;
1645 for (double snapAngle : snapAngles) {
1646 delta = getAngleDelta(angle, snapAngle);
1647 if (delta < minDelta) {
1648 minDelta = delta;
1649 bestAngle = snapAngle;
1650 }
1651 }
1652 if (Math.abs(bestAngle-360) < 1e-3) {
1653 bestAngle=0;
1654 }
1655 return bestAngle;
1656 }
1657
1658 private double getAngleDelta(double a, double b) {
1659 double delta = Math.abs(a-b);
1660 if (delta>180)
1661 return 360-delta;
1662 else
1663 return delta;
1664 }
1665
1666 private void unFixOrTurnOff() {
1667 if (absoluteFix) {
1668 unsetFixedMode();
1669 } else {
1670 toggleSnapping();
1671 }
1672 }
1673
1674 private MouseListener anglePopupListener = new PopupMenuLauncher(new JPopupMenu() {
1675 private JCheckBoxMenuItem repeatedCb = new JCheckBoxMenuItem(
1676 new AbstractAction(tr("Toggle snapping by {0}", getShortcut().getKeyText())) {
1677 @Override public void actionPerformed(ActionEvent e) {
1678 boolean sel=((JCheckBoxMenuItem) e.getSource()).getState();
1679 Main.pref.put("draw.anglesnap.toggleOnRepeatedA", sel);
1680 init();
1681 }
1682 });
1683 private JCheckBoxMenuItem helperCb = new JCheckBoxMenuItem(
1684 new AbstractAction(tr("Show helper geometry")) {
1685 @Override public void actionPerformed(ActionEvent e) {
1686 boolean sel=((JCheckBoxMenuItem) e.getSource()).getState();
1687 Main.pref.put("draw.anglesnap.drawConstructionGeometry", sel);
1688 Main.pref.put("draw.anglesnap.drawProjectedPoint", sel);
1689 Main.pref.put("draw.anglesnap.showAngle", sel);
1690 init();
1691 enableSnapping();
1692 }
1693 });
1694 private JCheckBoxMenuItem projectionCb = new JCheckBoxMenuItem(
1695 new AbstractAction(tr("Snap to node projections")) {
1696 @Override public void actionPerformed(ActionEvent e) {
1697 boolean sel=((JCheckBoxMenuItem) e.getSource()).getState();
1698 Main.pref.put("draw.anglesnap.projectionsnap", sel);
1699 init();
1700 enableSnapping();
1701 }
1702 });
1703 {
1704 helperCb.setState(Main.pref.getBoolean("draw.anglesnap.drawConstructionGeometry",true));
1705 projectionCb.setState(Main.pref.getBoolean("draw.anglesnap.projectionsnapgvff",true));
1706 repeatedCb.setState(Main.pref.getBoolean("draw.anglesnap.toggleOnRepeatedA",true));
1707 add(repeatedCb);
1708 add(helperCb);
1709 add(projectionCb);
1710 add(new AbstractAction(tr("Disable")) {
1711 @Override public void actionPerformed(ActionEvent e) {
1712 saveAngles("180");
1713 init();
1714 enableSnapping();
1715 }
1716 });
1717 add(new AbstractAction(tr("0,90,...")) {
1718 @Override public void actionPerformed(ActionEvent e) {
1719 saveAngles("0","90","180");
1720 init();
1721 enableSnapping();
1722 }
1723 });
1724 add(new AbstractAction(tr("0,45,90,...")) {
1725 @Override public void actionPerformed(ActionEvent e) {
1726 saveAngles("0","45","90","135","180");
1727 init();
1728 enableSnapping();
1729 }
1730 });
1731 add(new AbstractAction(tr("0,30,45,60,90,...")) {
1732 @Override public void actionPerformed(ActionEvent e) {
1733 saveAngles("0","30","45","60","90","120","135","150","180");
1734 init();
1735 enableSnapping();
1736 }
1737 });
1738 }
1739 }) {
1740 @Override
1741 public void mouseClicked(MouseEvent e) {
1742 super.mouseClicked(e);
1743 if (e.getButton() == MouseEvent.BUTTON1) {
1744 toggleSnapping();
1745 updateStatusLine();
1746 }
1747 }
1748 };
1749 }
1750
1751 private class SnapChangeAction extends JosmAction {
1752 public SnapChangeAction() {
1753 super(tr("Angle snapping"), /* ICON() */ "anglesnap",
1754 tr("Switch angle snapping mode while drawing"), null, false);
1755 putValue("help", ht("/Action/Draw/AngleSnap"));
1756 }
1757
1758 @Override
1759 public void actionPerformed(ActionEvent e) {
1760 if (snapHelper!=null) {
1761 snapHelper.toggleSnapping();
1762 }
1763 }
1764 }
1765}
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