source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/DrawAction.java@ 14510

Last change on this file since 14510 was 14510, checked in by GerdP, 5 years ago

see #17040 call DrawAction.finishDrawing() when selection is empty or destroy() is called.
  • Property svn:eol-style set to native
File size: 55.2 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.event.ActionEvent;
15import java.awt.event.KeyEvent;
16import java.awt.event.MouseEvent;
17import java.util.ArrayList;
18import java.util.Collection;
19import java.util.Collections;
20import java.util.HashMap;
21import java.util.HashSet;
22import java.util.Iterator;
23import java.util.LinkedList;
24import java.util.List;
25import java.util.Map;
26import java.util.Set;
27
28import javax.swing.AbstractAction;
29import javax.swing.JCheckBoxMenuItem;
30import javax.swing.JMenuItem;
31import javax.swing.JOptionPane;
32import javax.swing.SwingUtilities;
33
34import org.openstreetmap.josm.actions.JosmAction;
35import org.openstreetmap.josm.command.AddCommand;
36import org.openstreetmap.josm.command.ChangeCommand;
37import org.openstreetmap.josm.command.Command;
38import org.openstreetmap.josm.command.SequenceCommand;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.UndoRedoHandler;
41import org.openstreetmap.josm.data.coor.EastNorth;
42import org.openstreetmap.josm.data.osm.DataSelectionListener;
43import org.openstreetmap.josm.data.osm.DataSet;
44import org.openstreetmap.josm.data.osm.Node;
45import org.openstreetmap.josm.data.osm.OsmPrimitive;
46import org.openstreetmap.josm.data.osm.Way;
47import org.openstreetmap.josm.data.osm.WaySegment;
48import org.openstreetmap.josm.data.osm.event.SelectionEventManager;
49import org.openstreetmap.josm.data.osm.visitor.paint.ArrowPaintHelper;
50import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
51import org.openstreetmap.josm.data.preferences.AbstractProperty;
52import org.openstreetmap.josm.data.preferences.BooleanProperty;
53import org.openstreetmap.josm.data.preferences.CachingProperty;
54import org.openstreetmap.josm.data.preferences.DoubleProperty;
55import org.openstreetmap.josm.data.preferences.NamedColorProperty;
56import org.openstreetmap.josm.data.preferences.StrokeProperty;
57import org.openstreetmap.josm.gui.MainApplication;
58import org.openstreetmap.josm.gui.MainMenu;
59import org.openstreetmap.josm.gui.MapFrame;
60import org.openstreetmap.josm.gui.MapView;
61import org.openstreetmap.josm.gui.MapViewState.MapViewPoint;
62import org.openstreetmap.josm.gui.NavigatableComponent;
63import org.openstreetmap.josm.gui.draw.MapPath2D;
64import org.openstreetmap.josm.gui.layer.Layer;
65import org.openstreetmap.josm.gui.layer.MapViewPaintable;
66import org.openstreetmap.josm.gui.layer.OsmDataLayer;
67import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
68import org.openstreetmap.josm.gui.util.ModifierExListener;
69import org.openstreetmap.josm.tools.Geometry;
70import org.openstreetmap.josm.tools.ImageProvider;
71import org.openstreetmap.josm.tools.Pair;
72import org.openstreetmap.josm.tools.Shortcut;
73import org.openstreetmap.josm.tools.Utils;
74
75/**
76 * Mapmode to add nodes, create and extend ways.
77 */
78public class DrawAction extends MapMode implements MapViewPaintable, DataSelectionListener, KeyPressReleaseListener, ModifierExListener {
79
80 /**
81 * If this property is set, the draw action moves the viewport when adding new points.
82 * @since 12182
83 */
84 public static final CachingProperty<Boolean> VIEWPORT_FOLLOWING = new BooleanProperty("draw.viewport.following", false).cached();
85
86 private static final Color ORANGE_TRANSPARENT = new Color(Color.ORANGE.getRed(), Color.ORANGE.getGreen(), Color.ORANGE.getBlue(), 128);
87
88 private static final ArrowPaintHelper START_WAY_INDICATOR = new ArrowPaintHelper(Utils.toRadians(90), 8);
89
90 static final CachingProperty<Boolean> USE_REPEATED_SHORTCUT
91 = new BooleanProperty("draw.anglesnap.toggleOnRepeatedA", true).cached();
92 static final CachingProperty<BasicStroke> RUBBER_LINE_STROKE
93 = new StrokeProperty("draw.stroke.helper-line", "3").cached();
94
95 static final CachingProperty<BasicStroke> HIGHLIGHT_STROKE
96 = new StrokeProperty("draw.anglesnap.stroke.highlight", "10").cached();
97 static final CachingProperty<BasicStroke> HELPER_STROKE
98 = new StrokeProperty("draw.anglesnap.stroke.helper", "1 4").cached();
99
100 static final CachingProperty<Double> SNAP_ANGLE_TOLERANCE
101 = new DoubleProperty("draw.anglesnap.tolerance", 5.0).cached();
102 static final CachingProperty<Boolean> DRAW_CONSTRUCTION_GEOMETRY
103 = new BooleanProperty("draw.anglesnap.drawConstructionGeometry", true).cached();
104 static final CachingProperty<Boolean> SHOW_PROJECTED_POINT
105 = new BooleanProperty("draw.anglesnap.drawProjectedPoint", true).cached();
106 static final CachingProperty<Boolean> SNAP_TO_PROJECTIONS
107 = new BooleanProperty("draw.anglesnap.projectionsnap", true).cached();
108
109 static final CachingProperty<Boolean> SHOW_ANGLE
110 = new BooleanProperty("draw.anglesnap.showAngle", true).cached();
111
112 static final CachingProperty<Color> SNAP_HELPER_COLOR
113 = new NamedColorProperty(marktr("draw angle snap"), Color.ORANGE).cached();
114
115 static final CachingProperty<Color> HIGHLIGHT_COLOR
116 = new NamedColorProperty(marktr("draw angle snap highlight"), ORANGE_TRANSPARENT).cached();
117
118 static final AbstractProperty<Color> RUBBER_LINE_COLOR
119 = PaintColors.SELECTED.getProperty().getChildColor(marktr("helper line"));
120
121 static final CachingProperty<Boolean> DRAW_HELPER_LINE
122 = new BooleanProperty("draw.helper-line", true).cached();
123 static final CachingProperty<Boolean> DRAW_TARGET_HIGHLIGHT
124 = new BooleanProperty("draw.target-highlight", true).cached();
125 static final CachingProperty<Double> SNAP_TO_INTERSECTION_THRESHOLD
126 = new DoubleProperty("edit.snap-intersection-threshold", 10).cached();
127
128 private final Cursor cursorJoinNode;
129 private final Cursor cursorJoinWay;
130
131 private transient Node lastUsedNode;
132 private double toleranceMultiplier;
133
134 private transient Node mouseOnExistingNode;
135 private transient Set<Way> mouseOnExistingWays = new HashSet<>();
136 // old highlights store which primitives are currently highlighted. This
137 // is true, even if target highlighting is disabled since the status bar
138 // derives its information from this list as well.
139 private transient Set<OsmPrimitive> oldHighlights = new HashSet<>();
140 // new highlights contains a list of primitives that should be highlighted
141 // but haven't been so far. The idea is to compare old and new and only
142 // repaint if there are changes.
143 private transient Set<OsmPrimitive> newHighlights = new HashSet<>();
144 private boolean wayIsFinished;
145 private Point mousePos;
146 private Point oldMousePos;
147
148 private transient Node currentBaseNode;
149 private transient Node previousNode;
150 private EastNorth currentMouseEastNorth;
151
152 private final transient DrawSnapHelper snapHelper = new DrawSnapHelper(this);
153
154 private final transient Shortcut backspaceShortcut;
155 private final BackSpaceAction backspaceAction;
156 private final transient Shortcut snappingShortcut;
157 private boolean ignoreNextKeyRelease;
158
159 private final SnapChangeAction snapChangeAction;
160 private final JCheckBoxMenuItem snapCheckboxMenuItem;
161 private static final BasicStroke BASIC_STROKE = new BasicStroke(1);
162
163 private Point rightClickPressPos;
164
165 /**
166 * Constructs a new {@code DrawAction}.
167 * @since 11713
168 */
169 public DrawAction() {
170 super(tr("Draw"), "node/autonode", tr("Draw nodes"),
171 Shortcut.registerShortcut("mapmode:draw", tr("Mode: {0}", tr("Draw")), KeyEvent.VK_A, Shortcut.DIRECT),
172 ImageProvider.getCursor("crosshair", null));
173
174 snappingShortcut = Shortcut.registerShortcut("mapmode:drawanglesnapping",
175 tr("Mode: Draw Angle snapping"), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
176 snapChangeAction = new SnapChangeAction();
177 snapCheckboxMenuItem = addMenuItem();
178 snapHelper.setMenuCheckBox(snapCheckboxMenuItem);
179 backspaceShortcut = Shortcut.registerShortcut("mapmode:backspace",
180 tr("Backspace in Add mode"), KeyEvent.VK_BACK_SPACE, Shortcut.DIRECT);
181 backspaceAction = new BackSpaceAction();
182 cursorJoinNode = ImageProvider.getCursor("crosshair", "joinnode");
183 cursorJoinWay = ImageProvider.getCursor("crosshair", "joinway");
184
185 snapHelper.init();
186 }
187
188 private JCheckBoxMenuItem addMenuItem() {
189 int n = MainApplication.getMenu().editMenu.getItemCount();
190 for (int i = n-1; i > 0; i--) {
191 JMenuItem item = MainApplication.getMenu().editMenu.getItem(i);
192 if (item != null && item.getAction() != null && item.getAction() instanceof SnapChangeAction) {
193 MainApplication.getMenu().editMenu.remove(i);
194 }
195 }
196 return MainMenu.addWithCheckbox(MainApplication.getMenu().editMenu, snapChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
197 }
198
199 /**
200 * Checks if a map redraw is required and does so if needed. Also updates the status bar.
201 * @param e event, can be null
202 * @return true if a repaint is needed
203 */
204 private boolean redrawIfRequired(Object e) {
205 updateStatusLine();
206 // repaint required if the helper line is active.
207 boolean needsRepaint = DRAW_HELPER_LINE.get() && !wayIsFinished;
208 if (DRAW_TARGET_HIGHLIGHT.get()) {
209 // move newHighlights to oldHighlights; only update changed primitives
210 for (OsmPrimitive x : newHighlights) {
211 if (oldHighlights.contains(x)) {
212 continue;
213 }
214 x.setHighlighted(true);
215 needsRepaint = true;
216 }
217 oldHighlights.removeAll(newHighlights);
218 for (OsmPrimitive x : oldHighlights) {
219 x.setHighlighted(false);
220 needsRepaint = true;
221 }
222 }
223 // required in order to print correct help text
224 oldHighlights = newHighlights;
225
226 if (!needsRepaint && !DRAW_TARGET_HIGHLIGHT.get())
227 return false;
228
229 // update selection to reflect which way being modified
230 OsmDataLayer editLayer = getLayerManager().getEditLayer();
231 Node baseNode = getCurrentBaseNode();
232 if (editLayer != null && baseNode != null && !editLayer.data.selectionEmpty()) {
233 DataSet currentDataSet = editLayer.getDataSet();
234 Way continueFrom = getWayForNode(baseNode);
235 if (alt && continueFrom != null && (!baseNode.isSelected() || continueFrom.isSelected())) {
236 addRemoveSelection(currentDataSet, baseNode, continueFrom);
237 needsRepaint = true;
238 } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
239 addSelection(currentDataSet, continueFrom);
240 needsRepaint = true;
241 }
242 }
243
244 if (!needsRepaint && e instanceof SelectionChangeEvent) {
245 SelectionChangeEvent event = (SelectionChangeEvent) e;
246 needsRepaint = !event.getOldSelection().isEmpty() && event.getSelection().isEmpty();
247 }
248
249 if (needsRepaint && editLayer != null) {
250 editLayer.invalidate();
251 }
252 return needsRepaint;
253 }
254
255 private static void addRemoveSelection(DataSet ds, OsmPrimitive toAdd, OsmPrimitive toRemove) {
256 ds.beginUpdate(); // to prevent the selection listener to screw around with the state
257 try {
258 addSelection(ds, toAdd);
259 clearSelection(ds, toRemove);
260 } finally {
261 ds.endUpdate();
262 }
263 }
264
265 private static void updatePreservedFlag(OsmPrimitive osm, boolean state) {
266 // Preserves selected primitives and selected way nodes
267 osm.setPreserved(state);
268 if (osm instanceof Way) {
269 for (Node n : ((Way) osm).getNodes()) {
270 n.setPreserved(state);
271 }
272 }
273 }
274
275 private static void setSelection(DataSet ds, Collection<OsmPrimitive> toSet) {
276 toSet.stream().forEach(x -> updatePreservedFlag(x, true));
277 ds.setSelected(toSet);
278 }
279
280 private static void setSelection(DataSet ds, OsmPrimitive toSet) {
281 updatePreservedFlag(toSet, true);
282 ds.setSelected(toSet);
283 }
284
285 private static void addSelection(DataSet ds, OsmPrimitive toAdd) {
286 updatePreservedFlag(toAdd, true);
287 ds.addSelected(toAdd);
288 }
289
290 private static void clearSelection(DataSet ds, OsmPrimitive toRemove) {
291 ds.clearSelection(toRemove);
292 updatePreservedFlag(toRemove, false);
293 }
294
295 @Override
296 public void enterMode() {
297 if (!isEnabled())
298 return;
299 super.enterMode();
300 readPreferences();
301
302 // determine if selection is suitable to continue drawing. If it
303 // isn't, set wayIsFinished to true to avoid superfluous repaints.
304 determineCurrentBaseNodeAndPreviousNode(getLayerManager().getEditDataSet().getSelected());
305 wayIsFinished = getCurrentBaseNode() == null;
306
307 toleranceMultiplier = 0.01 * NavigatableComponent.PROP_SNAP_DISTANCE.get();
308
309 snapHelper.init();
310 snapCheckboxMenuItem.getAction().setEnabled(true);
311
312 MapFrame map = MainApplication.getMap();
313 map.statusLine.getAnglePanel().addMouseListener(snapHelper.anglePopupListener);
314 MainApplication.registerActionShortcut(backspaceAction, backspaceShortcut);
315
316 map.mapView.addMouseListener(this);
317 map.mapView.addMouseMotionListener(this);
318 map.mapView.addTemporaryLayer(this);
319 SelectionEventManager.getInstance().addSelectionListenerForEdt(this);
320
321 map.keyDetector.addKeyListener(this);
322 map.keyDetector.addModifierExListener(this);
323 ignoreNextKeyRelease = true;
324 }
325
326 @Override
327 public void exitMode() {
328 super.exitMode();
329 MapFrame map = MainApplication.getMap();
330 map.mapView.removeMouseListener(this);
331 map.mapView.removeMouseMotionListener(this);
332 map.mapView.removeTemporaryLayer(this);
333 SelectionEventManager.getInstance().removeSelectionListener(this);
334 MainApplication.unregisterActionShortcut(backspaceAction, backspaceShortcut);
335 snapHelper.unsetFixedMode();
336 snapCheckboxMenuItem.getAction().setEnabled(false);
337
338 map.statusLine.getAnglePanel().removeMouseListener(snapHelper.anglePopupListener);
339 map.statusLine.activateAnglePanel(false);
340
341 DataSet ds = getLayerManager().getEditDataSet();
342 if (ds != null) {
343 ds.getSelected().stream().forEach(x -> updatePreservedFlag(x, false));
344 }
345
346 removeHighlighting(null);
347 map.keyDetector.removeKeyListener(this);
348 map.keyDetector.removeModifierExListener(this);
349 }
350
351 /**
352 * redraw to (possibly) get rid of helper line if selection changes.
353 */
354 @Override
355 public void modifiersExChanged(int modifiers) {
356 if (!MainApplication.isDisplayingMapView() || !MainApplication.getMap().mapView.isActiveLayerDrawable())
357 return;
358 updateKeyModifiersEx(modifiers);
359 computeHelperLine();
360 addHighlighting(null);
361 }
362
363 @Override
364 public void doKeyPressed(KeyEvent e) {
365 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
366 return;
367 snapHelper.setFixedMode();
368 computeHelperLine();
369 redrawIfRequired(e);
370 }
371
372 @Override
373 public void doKeyReleased(KeyEvent e) {
374 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
375 return;
376 if (ignoreNextKeyRelease) {
377 ignoreNextKeyRelease = false;
378 return;
379 }
380 snapHelper.unFixOrTurnOff();
381 computeHelperLine();
382 redrawIfRequired(e);
383 }
384
385 /**
386 * redraw to (possibly) get rid of helper line if selection changes.
387 */
388 @Override
389 public void selectionChanged(SelectionChangeEvent event) {
390 if (!MainApplication.getMap().mapView.isActiveLayerDrawable())
391 return;
392 if (event.getSelection().isEmpty())
393 finishDrawing();
394 // Make sure helper line is computed later (causes deadlock in selection event chain otherwise)
395 SwingUtilities.invokeLater(() -> {
396 event.getOldSelection().stream().forEach(x -> updatePreservedFlag(x, false));
397 event.getSelection().stream().forEach(x -> updatePreservedFlag(x, true));
398 if (MainApplication.getMap() != null) {
399 computeHelperLine();
400 addHighlighting(event);
401 }
402 });
403 }
404
405 private void tryAgain(MouseEvent e) {
406 getLayerManager().getEditDataSet().clearSelection();
407 mouseReleased(e);
408 }
409
410 /**
411 * This function should be called when the user wishes to finish his current draw action.
412 * If Potlatch Style is enabled, it will switch to select tool, otherwise simply disable
413 * the helper line until the user chooses to draw something else.
414 */
415 private void finishDrawing() {
416 lastUsedNode = null;
417 wayIsFinished = true;
418 MainApplication.getMap().selectSelectTool(true);
419 snapHelper.noSnapNow();
420
421 // Redraw to remove the helper line stub
422 computeHelperLine();
423 removeHighlighting(null);
424 }
425
426 @Override
427 public void mousePressed(MouseEvent e) {
428 if (e.getButton() == MouseEvent.BUTTON3) {
429 rightClickPressPos = e.getPoint();
430 }
431 }
432
433 /**
434 * If user clicked with the left button, add a node at the current mouse
435 * position.
436 *
437 * If in nodeway mode, insert the node into the way.
438 */
439 @Override
440 public void mouseReleased(MouseEvent e) {
441 if (e.getButton() == MouseEvent.BUTTON3) {
442 Point curMousePos = e.getPoint();
443 if (curMousePos.equals(rightClickPressPos)) {
444 tryToSetBaseSegmentForAngleSnap();
445 }
446 return;
447 }
448 if (e.getButton() != MouseEvent.BUTTON1)
449 return;
450 MapView mapView = MainApplication.getMap().mapView;
451 if (!mapView.isActiveLayerDrawable())
452 return;
453 // request focus in order to enable the expected keyboard shortcuts
454 //
455 mapView.requestFocus();
456
457 if (e.getClickCount() > 1 && mousePos != null && mousePos.equals(oldMousePos)) {
458 // A double click equals "user clicked last node again, finish way"
459 // Change draw tool only if mouse position is nearly the same, as
460 // otherwise fast clicks will count as a double click
461 finishDrawing();
462 return;
463 }
464 oldMousePos = mousePos;
465
466 // we copy ctrl/alt/shift from the event just in case our global
467 // keyDetector didn't make it through the security manager. Unclear
468 // if that can ever happen but better be safe.
469 updateKeyModifiers(e);
470 mousePos = e.getPoint();
471
472 DataSet ds = getLayerManager().getEditDataSet();
473 Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
474
475 boolean newNode = false;
476 Node n = mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
477 if (ctrl) {
478 Iterator<Way> it = ds.getSelectedWays().iterator();
479 if (it.hasNext()) {
480 // ctrl-click on node of selected way = reuse node despite of ctrl
481 if (!it.next().containsNode(n)) n = null;
482 } else {
483 n = null; // ctrl-click + no selected way = new node
484 }
485 }
486
487 if (n != null && !snapHelper.isActive()) {
488 // user clicked on node
489 if (selection.isEmpty() || wayIsFinished) {
490 // select the clicked node and do nothing else
491 // (this is just a convenience option so that people don't
492 // have to switch modes)
493
494 setSelection(ds, n);
495 // If we extend/continue an existing way, select it already now to make it obvious
496 Way continueFrom = getWayForNode(n);
497 if (continueFrom != null) {
498 addSelection(ds, continueFrom);
499 }
500
501 // The user explicitly selected a node, so let him continue drawing
502 wayIsFinished = false;
503 return;
504 }
505 } else {
506 EastNorth newEN;
507 if (n != null) {
508 EastNorth foundPoint = n.getEastNorth();
509 // project found node to snapping line
510 newEN = snapHelper.getSnapPoint(foundPoint);
511 // do not add new node if there is some node within snapping distance
512 double tolerance = mapView.getDist100Pixel() * toleranceMultiplier;
513 if (foundPoint.distance(newEN) > tolerance) {
514 n = new Node(newEN); // point != projected, so we create new node
515 newNode = true;
516 }
517 } else { // n==null, no node found in clicked area
518 EastNorth mouseEN = mapView.getEastNorth(e.getX(), e.getY());
519 newEN = snapHelper.isSnapOn() ? snapHelper.getSnapPoint(mouseEN) : mouseEN;
520 n = new Node(newEN); //create node at clicked point
521 newNode = true;
522 }
523 snapHelper.unsetFixedMode();
524 }
525
526 Collection<Command> cmds = new LinkedList<>();
527 Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());
528 List<Way> reuseWays = new ArrayList<>();
529 List<Way> replacedWays = new ArrayList<>();
530
531 if (newNode) {
532 if (n.getCoor().isOutSideWorld()) {
533 JOptionPane.showMessageDialog(
534 MainApplication.getMainFrame(),
535 tr("Cannot add a node outside of the world."),
536 tr("Warning"),
537 JOptionPane.WARNING_MESSAGE
538 );
539 return;
540 }
541 cmds.add(new AddCommand(ds, n));
542
543 if (!ctrl) {
544 // Insert the node into all the nearby way segments
545 List<WaySegment> wss = mapView.getNearestWaySegments(
546 mapView.getPoint(n), OsmPrimitive::isSelectable);
547 if (snapHelper.isActive()) {
548 tryToMoveNodeOnIntersection(wss, n);
549 }
550 insertNodeIntoAllNearbySegments(wss, n, newSelection, cmds, replacedWays, reuseWays);
551 }
552 }
553 // now "n" is newly created or reused node that shoud be added to some way
554
555 // This part decides whether or not a "segment" (i.e. a connection) is made to an existing node.
556
557 // For a connection to be made, the user must either have a node selected (connection
558 // is made to that node), or he must have a way selected *and* one of the endpoints
559 // of that way must be the last used node (connection is made to last used node), or
560 // he must have a way and a node selected (connection is made to the selected node).
561
562 // If the above does not apply, the selection is cleared and a new try is started
563
564 boolean extendedWay = false;
565 boolean wayIsFinishedTemp = wayIsFinished;
566 wayIsFinished = false;
567
568 // don't draw lines if shift is held
569 if (!selection.isEmpty() && !shift) {
570 Node selectedNode = null;
571 Way selectedWay = null;
572
573 for (OsmPrimitive p : selection) {
574 if (p instanceof Node) {
575 if (selectedNode != null) {
576 // Too many nodes selected to do something useful
577 tryAgain(e);
578 return;
579 }
580 selectedNode = (Node) p;
581 } else if (p instanceof Way) {
582 if (selectedWay != null) {
583 // Too many ways selected to do something useful
584 tryAgain(e);
585 return;
586 }
587 selectedWay = (Way) p;
588 }
589 }
590
591 // the node from which we make a connection
592 Node n0 = findNodeToContinueFrom(selectedNode, selectedWay);
593 // We have a selection but it isn't suitable. Try again.
594 if (n0 == null) {
595 tryAgain(e);
596 return;
597 }
598 if (!wayIsFinishedTemp) {
599 if (isSelfContainedWay(selectedWay, n0, n))
600 return;
601
602 // User clicked last node again, finish way
603 if (n0 == n) {
604 finishDrawing();
605 return;
606 }
607
608 // Ok we know now that we'll insert a line segment, but will it connect to an
609 // existing way or make a new way of its own? The "alt" modifier means that the
610 // user wants a new way.
611 Way way = alt ? null : (selectedWay != null ? selectedWay : getWayForNode(n0));
612 Way wayToSelect;
613
614 // Don't allow creation of self-overlapping ways
615 if (way != null) {
616 int nodeCount = 0;
617 for (Node p : way.getNodes()) {
618 if (p.equals(n0)) {
619 nodeCount++;
620 }
621 }
622 if (nodeCount > 1) {
623 way = null;
624 }
625 }
626
627 if (way == null) {
628 way = new Way();
629 way.addNode(n0);
630 cmds.add(new AddCommand(ds, way));
631 wayToSelect = way;
632 } else {
633 int i;
634 if ((i = replacedWays.indexOf(way)) != -1) {
635 way = reuseWays.get(i);
636 wayToSelect = way;
637 } else {
638 wayToSelect = way;
639 Way wnew = new Way(way);
640 cmds.add(new ChangeCommand(way, wnew));
641 way = wnew;
642 }
643 }
644
645 // Connected to a node that's already in the way
646 if (way.containsNode(n)) {
647 wayIsFinished = true;
648 selection.clear();
649 }
650
651 // Add new node to way
652 if (way.getNode(way.getNodesCount() - 1) == n0) {
653 way.addNode(n);
654 } else {
655 way.addNode(0, n);
656 }
657
658 extendedWay = true;
659 newSelection.clear();
660 newSelection.add(wayToSelect);
661 }
662 }
663 if (!extendedWay && !newNode) {
664 return; // We didn't do anything.
665 }
666
667 String title = getTitle(newNode, n, newSelection, reuseWays, extendedWay);
668
669 Command c = new SequenceCommand(title, cmds);
670
671 UndoRedoHandler.getInstance().add(c);
672 if (!wayIsFinished) {
673 lastUsedNode = n;
674 }
675
676 setSelection(ds, newSelection);
677
678 // "viewport following" mode for tracing long features
679 // from aerial imagery or GPS tracks.
680 if (VIEWPORT_FOLLOWING.get()) {
681 mapView.smoothScrollTo(n.getEastNorth());
682 }
683 computeHelperLine();
684 removeHighlighting(e);
685 }
686
687 private static String getTitle(boolean newNode, Node n, Collection<OsmPrimitive> newSelection, List<Way> reuseWays,
688 boolean extendedWay) {
689 String title;
690 if (!extendedWay) {
691 if (reuseWays.isEmpty()) {
692 title = tr("Add node");
693 } else {
694 title = tr("Add node into way");
695 for (Way w : reuseWays) {
696 newSelection.remove(w);
697 }
698 }
699 newSelection.clear();
700 newSelection.add(n);
701 } else if (!newNode) {
702 title = tr("Connect existing way to node");
703 } else if (reuseWays.isEmpty()) {
704 title = tr("Add a new node to an existing way");
705 } else {
706 title = tr("Add node into way and connect");
707 }
708 return title;
709 }
710
711 private void insertNodeIntoAllNearbySegments(List<WaySegment> wss, Node n, Collection<OsmPrimitive> newSelection,
712 Collection<Command> cmds, List<Way> replacedWays, List<Way> reuseWays) {
713 Map<Way, List<Integer>> insertPoints = new HashMap<>();
714 for (WaySegment ws : wss) {
715 List<Integer> is;
716 if (insertPoints.containsKey(ws.way)) {
717 is = insertPoints.get(ws.way);
718 } else {
719 is = new ArrayList<>();
720 insertPoints.put(ws.way, is);
721 }
722
723 is.add(ws.lowerIndex);
724 }
725
726 Set<Pair<Node, Node>> segSet = new HashSet<>();
727
728 for (Map.Entry<Way, List<Integer>> insertPoint : insertPoints.entrySet()) {
729 Way w = insertPoint.getKey();
730 List<Integer> is = insertPoint.getValue();
731
732 Way wnew = new Way(w);
733
734 pruneSuccsAndReverse(is);
735 for (int i : is) {
736 segSet.add(Pair.sort(new Pair<>(w.getNode(i), w.getNode(i+1))));
737 wnew.addNode(i + 1, n);
738 }
739
740 // If ALT is pressed, a new way should be created and that new way should get
741 // selected. This works every time unless the ways the nodes get inserted into
742 // are already selected. This is the case when creating a self-overlapping way
743 // but pressing ALT prevents this. Therefore we must de-select the way manually
744 // here so /only/ the new way will be selected after this method finishes.
745 if (alt) {
746 newSelection.add(insertPoint.getKey());
747 }
748
749 cmds.add(new ChangeCommand(insertPoint.getKey(), wnew));
750 replacedWays.add(insertPoint.getKey());
751 reuseWays.add(wnew);
752 }
753
754 adjustNode(segSet, n);
755 }
756
757 /**
758 * Prevent creation of ways that look like this: &lt;----&gt;
759 * This happens if users want to draw a no-exit-sideway from the main way like this:
760 * ^
761 * |&lt;----&gt;
762 * |
763 * The solution isn't ideal because the main way will end in the side way, which is bad for
764 * navigation software ("drive straight on") but at least easier to fix. Maybe users will fix
765 * it on their own, too. At least it's better than producing an error.
766 *
767 * @param selectedWay the way to check
768 * @param currentNode the current node (i.e. the one the connection will be made from)
769 * @param targetNode the target node (i.e. the one the connection will be made to)
770 * @return {@code true} if this would create a selfcontaining way, {@code false} otherwise.
771 */
772 private boolean isSelfContainedWay(Way selectedWay, Node currentNode, Node targetNode) {
773 if (selectedWay != null) {
774 int posn0 = selectedWay.getNodes().indexOf(currentNode);
775 // CHECKSTYLE.OFF: SingleSpaceSeparator
776 if ((posn0 != -1 && // n0 is part of way
777 (posn0 >= 1 && targetNode.equals(selectedWay.getNode(posn0-1)))) || // previous node
778 (posn0 < selectedWay.getNodesCount()-1 && targetNode.equals(selectedWay.getNode(posn0+1)))) { // next node
779 setSelection(getLayerManager().getEditDataSet(), targetNode);
780 lastUsedNode = targetNode;
781 return true;
782 }
783 // CHECKSTYLE.ON: SingleSpaceSeparator
784 }
785
786 return false;
787 }
788
789 /**
790 * Finds a node to continue drawing from. Decision is based upon given node and way.
791 * @param selectedNode Currently selected node, may be null
792 * @param selectedWay Currently selected way, may be null
793 * @return Node if a suitable node is found, null otherwise
794 */
795 private Node findNodeToContinueFrom(Node selectedNode, Way selectedWay) {
796 // No nodes or ways have been selected, this occurs when a relation
797 // has been selected or the selection is empty
798 if (selectedNode == null && selectedWay == null)
799 return null;
800
801 if (selectedNode == null) {
802 if (selectedWay.isFirstLastNode(lastUsedNode))
803 return lastUsedNode;
804
805 // We have a way selected, but no suitable node to continue from. Start anew.
806 return null;
807 }
808
809 if (selectedWay == null)
810 return selectedNode;
811
812 if (selectedWay.isFirstLastNode(selectedNode))
813 return selectedNode;
814
815 // We have a way and node selected, but it's not at the start/end of the way. Start anew.
816 return null;
817 }
818
819 @Override
820 public void mouseDragged(MouseEvent e) {
821 mouseMoved(e);
822 }
823
824 @Override
825 public void mouseMoved(MouseEvent e) {
826 if (!MainApplication.getMap().mapView.isActiveLayerDrawable())
827 return;
828
829 // we copy ctrl/alt/shift from the event just in case our global
830 // keyDetector didn't make it through the security manager. Unclear
831 // if that can ever happen but better be safe.
832 updateKeyModifiers(e);
833 mousePos = e.getPoint();
834 if (snapHelper.isSnapOn() && ctrl)
835 tryToSetBaseSegmentForAngleSnap();
836
837 computeHelperLine();
838 addHighlighting(e);
839 }
840
841 /**
842 * This method is used to detect segment under mouse and use it as reference for angle snapping
843 */
844 private void tryToSetBaseSegmentForAngleSnap() {
845 if (mousePos != null) {
846 WaySegment seg = MainApplication.getMap().mapView.getNearestWaySegment(mousePos, OsmPrimitive::isSelectable);
847 if (seg != null) {
848 snapHelper.setBaseSegment(seg);
849 }
850 }
851 }
852
853 /**
854 * This method prepares data required for painting the "helper line" from
855 * the last used position to the mouse cursor. It duplicates some code from
856 * mouseReleased() (FIXME).
857 */
858 private synchronized void computeHelperLine() {
859 if (mousePos == null) {
860 // Don't draw the line.
861 currentMouseEastNorth = null;
862 currentBaseNode = null;
863 return;
864 }
865
866 DataSet ds = getLayerManager().getEditDataSet();
867 Collection<OsmPrimitive> selection = ds != null ? ds.getSelected() : Collections.emptyList();
868
869 MapView mv = MainApplication.getMap().mapView;
870 Node currentMouseNode = null;
871 mouseOnExistingNode = null;
872 mouseOnExistingWays = new HashSet<>();
873
874 if (!ctrl && mousePos != null) {
875 currentMouseNode = mv.getNearestNode(mousePos, OsmPrimitive::isSelectable);
876 }
877
878 // We need this for highlighting and we'll only do so if we actually want to re-use
879 // *and* there is no node nearby (because nodes beat ways when re-using)
880 if (!ctrl && currentMouseNode == null) {
881 List<WaySegment> wss = mv.getNearestWaySegments(mousePos, OsmPrimitive::isSelectable);
882 for (WaySegment ws : wss) {
883 mouseOnExistingWays.add(ws.way);
884 }
885 }
886
887 if (currentMouseNode != null) {
888 // user clicked on node
889 if (selection.isEmpty()) return;
890 currentMouseEastNorth = currentMouseNode.getEastNorth();
891 mouseOnExistingNode = currentMouseNode;
892 } else {
893 // no node found in clicked area
894 currentMouseEastNorth = mv.getEastNorth(mousePos.x, mousePos.y);
895 }
896
897 determineCurrentBaseNodeAndPreviousNode(selection);
898 if (previousNode == null) {
899 snapHelper.noSnapNow();
900 }
901
902 if (getCurrentBaseNode() == null || getCurrentBaseNode() == currentMouseNode)
903 return; // Don't create zero length way segments.
904
905 showStatusInfo(-1, -1, -1, snapHelper.isSnapOn());
906
907 double curHdg = Utils.toDegrees(getCurrentBaseNode().getEastNorth()
908 .heading(currentMouseEastNorth));
909 double baseHdg = -1;
910 if (previousNode != null) {
911 EastNorth en = previousNode.getEastNorth();
912 if (en != null) {
913 baseHdg = Utils.toDegrees(en.heading(getCurrentBaseNode().getEastNorth()));
914 }
915 }
916
917 snapHelper.checkAngleSnapping(currentMouseEastNorth, baseHdg, curHdg);
918
919 // status bar was filled by snapHelper
920 }
921
922 static void showStatusInfo(double angle, double hdg, double distance, boolean activeFlag) {
923 MapFrame map = MainApplication.getMap();
924 map.statusLine.setAngle(angle);
925 map.statusLine.activateAnglePanel(activeFlag);
926 map.statusLine.setHeading(hdg);
927 map.statusLine.setDist(distance);
928 }
929
930 /**
931 * Helper function that sets fields currentBaseNode and previousNode
932 * @param selection
933 * uses also lastUsedNode field
934 */
935 private synchronized void determineCurrentBaseNodeAndPreviousNode(Collection<OsmPrimitive> selection) {
936 Node selectedNode = null;
937 Way selectedWay = null;
938 for (OsmPrimitive p : selection) {
939 if (p instanceof Node) {
940 if (selectedNode != null)
941 return;
942 selectedNode = (Node) p;
943 } else if (p instanceof Way) {
944 if (selectedWay != null)
945 return;
946 selectedWay = (Way) p;
947 }
948 }
949 // we are here, if not more than 1 way or node is selected,
950
951 // the node from which we make a connection
952 currentBaseNode = null;
953 previousNode = null;
954
955 // Try to find an open way to measure angle from it. The way is not to be continued!
956 // warning: may result in changes of currentBaseNode and previousNode
957 // please remove if bugs arise
958 if (selectedWay == null && selectedNode != null) {
959 for (OsmPrimitive p: selectedNode.getReferrers()) {
960 if (p.isUsable() && p instanceof Way && ((Way) p).isFirstLastNode(selectedNode)) {
961 if (selectedWay != null) { // two uncontinued ways, nothing to take as reference
962 selectedWay = null;
963 break;
964 } else {
965 // set us ~continue this way (measure angle from it)
966 selectedWay = (Way) p;
967 }
968 }
969 }
970 }
971
972 if (selectedNode == null) {
973 if (selectedWay == null)
974 return;
975 continueWayFromNode(selectedWay, lastUsedNode);
976 } else if (selectedWay == null) {
977 currentBaseNode = selectedNode;
978 } else if (!selectedWay.isDeleted()) { // fix #7118
979 continueWayFromNode(selectedWay, selectedNode);
980 }
981 }
982
983 /**
984 * if one of the ends of {@code way} is given {@code node},
985 * then set currentBaseNode = node and previousNode = adjacent node of way
986 * @param way way to continue
987 * @param node starting node
988 */
989 private void continueWayFromNode(Way way, Node node) {
990 int n = way.getNodesCount();
991 if (node == way.firstNode()) {
992 currentBaseNode = node;
993 if (n > 1) previousNode = way.getNode(1);
994 } else if (node == way.lastNode()) {
995 currentBaseNode = node;
996 if (n > 1) previousNode = way.getNode(n-2);
997 }
998 }
999
1000 /**
1001 * Repaint on mouse exit so that the helper line goes away.
1002 */
1003 @Override
1004 public void mouseExited(MouseEvent e) {
1005 OsmDataLayer editLayer = MainApplication.getLayerManager().getEditLayer();
1006 if (editLayer == null)
1007 return;
1008 mousePos = e.getPoint();
1009 snapHelper.noSnapNow();
1010 boolean repaintIssued = removeHighlighting(e);
1011 // force repaint in case snapHelper needs one. If removeHighlighting
1012 // caused one already, don't do it again.
1013 if (!repaintIssued) {
1014 editLayer.invalidate();
1015 }
1016 }
1017
1018 /**
1019 * Replies the parent way of a node, if it is the end of exactly one usable way.
1020 * @param n node
1021 * @return If the node is the end of exactly one way, return this.
1022 * <code>null</code> otherwise.
1023 */
1024 public static Way getWayForNode(Node n) {
1025 Way way = null;
1026 for (Way w : Utils.filteredCollection(n.getReferrers(), Way.class)) {
1027 if (!w.isUsable() || w.getNodesCount() < 1) {
1028 continue;
1029 }
1030 Node firstNode = w.getNode(0);
1031 Node lastNode = w.getNode(w.getNodesCount() - 1);
1032 if ((firstNode == n || lastNode == n) && (firstNode != lastNode)) {
1033 if (way != null)
1034 return null;
1035 way = w;
1036 }
1037 }
1038 return way;
1039 }
1040
1041 /**
1042 * Replies the current base node, after having checked it is still usable (see #11105).
1043 * @return the current base node (can be null). If not-null, it's guaranteed the node is usable
1044 */
1045 public synchronized Node getCurrentBaseNode() {
1046 if (currentBaseNode != null && (currentBaseNode.getDataSet() == null || !currentBaseNode.isUsable())) {
1047 currentBaseNode = null;
1048 }
1049 return currentBaseNode;
1050 }
1051
1052 private static void pruneSuccsAndReverse(List<Integer> is) {
1053 Set<Integer> is2 = new HashSet<>();
1054 for (int i : is) {
1055 if (!is2.contains(i - 1) && !is2.contains(i + 1)) {
1056 is2.add(i);
1057 }
1058 }
1059 is.clear();
1060 is.addAll(is2);
1061 Collections.sort(is);
1062 Collections.reverse(is);
1063 }
1064
1065 /**
1066 * Adjusts the position of a node to lie on a segment (or a segment intersection).
1067 *
1068 * If one or more than two segments are passed, the node is adjusted
1069 * to lie on the first segment that is passed.
1070 *
1071 * If two segments are passed, the node is adjusted to be at their intersection.
1072 *
1073 * No action is taken if no segments are passed.
1074 *
1075 * @param segs the segments to use as a reference when adjusting
1076 * @param n the node to adjust
1077 */
1078 private static void adjustNode(Collection<Pair<Node, Node>> segs, Node n) {
1079 switch (segs.size()) {
1080 case 0:
1081 return;
1082 case 2:
1083 adjustNodeTwoSegments(segs, n);
1084 break;
1085 default:
1086 adjustNodeDefault(segs, n);
1087 }
1088 }
1089
1090 private static void adjustNodeTwoSegments(Collection<Pair<Node, Node>> segs, Node n) {
1091 // This computes the intersection between the two segments and adjusts the node position.
1092 Iterator<Pair<Node, Node>> i = segs.iterator();
1093 Pair<Node, Node> seg = i.next();
1094 EastNorth pA = seg.a.getEastNorth();
1095 EastNorth pB = seg.b.getEastNorth();
1096 seg = i.next();
1097 EastNorth pC = seg.a.getEastNorth();
1098 EastNorth pD = seg.b.getEastNorth();
1099
1100 double u = det(pB.east() - pA.east(), pB.north() - pA.north(), pC.east() - pD.east(), pC.north() - pD.north());
1101
1102 // Check for parallel segments and do nothing if they are
1103 // In practice this will probably only happen when a way has been duplicated
1104
1105 if (u == 0)
1106 return;
1107
1108 // q is a number between 0 and 1
1109 // It is the point in the segment where the intersection occurs
1110 // if the segment is scaled to length 1
1111
1112 double q = det(pB.north() - pC.north(), pB.east() - pC.east(), pD.north() - pC.north(), pD.east() - pC.east()) / u;
1113 EastNorth intersection = new EastNorth(
1114 pB.east() + q * (pA.east() - pB.east()),
1115 pB.north() + q * (pA.north() - pB.north()));
1116
1117
1118 // only adjust to intersection if within snapToIntersectionThreshold pixel of mouse click; otherwise
1119 // fall through to default action.
1120 // (for semi-parallel lines, intersection might be miles away!)
1121 MapFrame map = MainApplication.getMap();
1122 if (map.mapView.getPoint2D(n).distance(map.mapView.getPoint2D(intersection)) < SNAP_TO_INTERSECTION_THRESHOLD.get()) {
1123 n.setEastNorth(intersection);
1124 return;
1125 }
1126
1127 adjustNodeDefault(segs, n);
1128 }
1129
1130 private static void adjustNodeDefault(Collection<Pair<Node, Node>> segs, Node n) {
1131 EastNorth p = n.getEastNorth();
1132 Pair<Node, Node> seg = segs.iterator().next();
1133 EastNorth pA = seg.a.getEastNorth();
1134 EastNorth pB = seg.b.getEastNorth();
1135 double a = p.distanceSq(pB);
1136 double b = p.distanceSq(pA);
1137 double c = pA.distanceSq(pB);
1138 double q = (a - b + c) / (2*c);
1139 n.setEastNorth(new EastNorth(pB.east() + q * (pA.east() - pB.east()), pB.north() + q * (pA.north() - pB.north())));
1140 }
1141
1142 // helper for adjustNode
1143 static double det(double a, double b, double c, double d) {
1144 return a * d - b * c;
1145 }
1146
1147 private void tryToMoveNodeOnIntersection(List<WaySegment> wss, Node n) {
1148 if (wss.isEmpty())
1149 return;
1150 WaySegment ws = wss.get(0);
1151 EastNorth p1 = ws.getFirstNode().getEastNorth();
1152 EastNorth p2 = ws.getSecondNode().getEastNorth();
1153 if (snapHelper.dir2 != null && getCurrentBaseNode() != null) {
1154 EastNorth xPoint = Geometry.getSegmentSegmentIntersection(p1, p2, snapHelper.dir2,
1155 getCurrentBaseNode().getEastNorth());
1156 if (xPoint != null) {
1157 n.setEastNorth(xPoint);
1158 }
1159 }
1160 }
1161
1162 /**
1163 * Takes the data from computeHelperLine to determine which ways/nodes should be highlighted
1164 * (if feature enabled). Also sets the target cursor if appropriate. It adds the to-be-
1165 * highlighted primitives to newHighlights but does not actually highlight them. This work is
1166 * done in redrawIfRequired. This means, calling addHighlighting() without redrawIfRequired()
1167 * will leave the data in an inconsistent state.
1168 *
1169 * The status bar derives its information from oldHighlights, so in order to update the status
1170 * bar both addHighlighting() and repaintIfRequired() are needed, since former fills newHighlights
1171 * and latter processes them into oldHighlights.
1172 * @param event event, can be null
1173 */
1174 private void addHighlighting(Object event) {
1175 newHighlights = new HashSet<>();
1176 MapView mapView = MainApplication.getMap().mapView;
1177
1178 // if ctrl key is held ("no join"), don't highlight anything
1179 if (ctrl) {
1180 mapView.setNewCursor(cursor, this);
1181 redrawIfRequired(event);
1182 return;
1183 }
1184
1185 // This happens when nothing is selected, but we still want to highlight the "target node"
1186 DataSet ds = getLayerManager().getEditDataSet();
1187 if (mouseOnExistingNode == null && mousePos != null && ds != null && ds.selectionEmpty()) {
1188 mouseOnExistingNode = mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
1189 }
1190
1191 if (mouseOnExistingNode != null) {
1192 mapView.setNewCursor(cursorJoinNode, this);
1193 newHighlights.add(mouseOnExistingNode);
1194 redrawIfRequired(event);
1195 return;
1196 }
1197
1198 // Insert the node into all the nearby way segments
1199 if (mouseOnExistingWays.isEmpty()) {
1200 mapView.setNewCursor(cursor, this);
1201 redrawIfRequired(event);
1202 return;
1203 }
1204
1205 mapView.setNewCursor(cursorJoinWay, this);
1206 newHighlights.addAll(mouseOnExistingWays);
1207 redrawIfRequired(event);
1208 }
1209
1210 /**
1211 * Removes target highlighting from primitives. Issues repaint if required.
1212 * @param event event, can be null
1213 * @return true if a repaint has been issued.
1214 */
1215 private boolean removeHighlighting(Object event) {
1216 newHighlights = new HashSet<>();
1217 return redrawIfRequired(event);
1218 }
1219
1220 @Override
1221 public synchronized void paint(Graphics2D g, MapView mv, Bounds box) {
1222 // sanity checks
1223 MapView mapView = MainApplication.getMap().mapView;
1224 if (mapView == null || mousePos == null
1225 // don't draw line if we don't know where from or where to
1226 || currentMouseEastNorth == null || getCurrentBaseNode() == null
1227 // don't draw line if mouse is outside window
1228 || !mapView.getState().getForView(mousePos.getX(), mousePos.getY()).isInView())
1229 return;
1230
1231 Graphics2D g2 = g;
1232 snapHelper.drawIfNeeded(g2, mv.getState());
1233 if (!DRAW_HELPER_LINE.get() || wayIsFinished || shift)
1234 return;
1235
1236 if (!snapHelper.isActive()) {
1237 g2.setColor(RUBBER_LINE_COLOR.get());
1238 g2.setStroke(RUBBER_LINE_STROKE.get());
1239 paintConstructionGeometry(mv, g2);
1240 } else if (DRAW_CONSTRUCTION_GEOMETRY.get()) {
1241 // else use color and stoke from snapHelper.draw
1242 paintConstructionGeometry(mv, g2);
1243 }
1244 }
1245
1246 private void paintConstructionGeometry(MapView mv, Graphics2D g2) {
1247 MapPath2D b = new MapPath2D();
1248 MapViewPoint p1 = mv.getState().getPointFor(getCurrentBaseNode());
1249 MapViewPoint p2 = mv.getState().getPointFor(currentMouseEastNorth);
1250
1251 b.moveTo(p1);
1252 b.lineTo(p2);
1253
1254 // if alt key is held ("start new way"), draw a little perpendicular line
1255 if (alt) {
1256 START_WAY_INDICATOR.paintArrowAt(b, p1, p2);
1257 }
1258
1259 g2.draw(b);
1260 g2.setStroke(BASIC_STROKE);
1261 }
1262
1263 @Override
1264 public String getModeHelpText() {
1265 StringBuilder rv;
1266 /*
1267 * No modifiers: all (Connect, Node Re-Use, Auto-Weld)
1268 * CTRL: disables node re-use, auto-weld
1269 * Shift: do not make connection
1270 * ALT: make connection but start new way in doing so
1271 */
1272
1273 /*
1274 * Status line text generation is split into two parts to keep it maintainable.
1275 * First part looks at what will happen to the new node inserted on click and
1276 * the second part will look if a connection is made or not.
1277 *
1278 * Note that this help text is not absolutely accurate as it doesn't catch any special
1279 * cases (e.g. when preventing <---> ways). The only special that it catches is when
1280 * a way is about to be finished.
1281 *
1282 * First check what happens to the new node.
1283 */
1284
1285 // oldHighlights stores the current highlights. If this
1286 // list is empty we can assume that we won't do any joins
1287 if (ctrl || oldHighlights.isEmpty()) {
1288 rv = new StringBuilder(tr("Create new node."));
1289 } else {
1290 // oldHighlights may store a node or way, check if it's a node
1291 OsmPrimitive x = oldHighlights.iterator().next();
1292 if (x instanceof Node) {
1293 rv = new StringBuilder(tr("Select node under cursor."));
1294 } else {
1295 rv = new StringBuilder(trn("Insert new node into way.", "Insert new node into {0} ways.",
1296 oldHighlights.size(), oldHighlights.size()));
1297 }
1298 }
1299
1300 /*
1301 * Check whether a connection will be made
1302 */
1303 if (!wayIsFinished && getCurrentBaseNode() != null) {
1304 if (alt) {
1305 rv.append(' ').append(tr("Start new way from last node."));
1306 } else {
1307 rv.append(' ').append(tr("Continue way from last node."));
1308 }
1309 if (snapHelper.isSnapOn()) {
1310 rv.append(' ').append(tr("Angle snapping active."));
1311 }
1312 }
1313
1314 Node n = mouseOnExistingNode;
1315 DataSet ds = getLayerManager().getEditDataSet();
1316 /*
1317 * Handle special case: Highlighted node == selected node => finish drawing
1318 */
1319 if (n != null && ds != null && ds.getSelectedNodes().contains(n)) {
1320 if (wayIsFinished) {
1321 rv = new StringBuilder(tr("Select node under cursor."));
1322 } else {
1323 rv = new StringBuilder(tr("Finish drawing."));
1324 }
1325 }
1326
1327 /*
1328 * Handle special case: Self-Overlapping or closing way
1329 */
1330 if (ds != null && !ds.getSelectedWays().isEmpty() && !wayIsFinished && !alt) {
1331 Way w = ds.getSelectedWays().iterator().next();
1332 for (Node m : w.getNodes()) {
1333 if (m.equals(mouseOnExistingNode) || mouseOnExistingWays.contains(w)) {
1334 rv.append(' ').append(tr("Finish drawing."));
1335 break;
1336 }
1337 }
1338 }
1339 return rv.toString();
1340 }
1341
1342 /**
1343 * Get selected primitives, while draw action is in progress.
1344 *
1345 * While drawing a way, technically the last node is selected.
1346 * This is inconvenient when the user tries to add/edit tags to the way.
1347 * For this case, this method returns the current way as selection,
1348 * to work around this issue.
1349 * Otherwise the normal selection of the current data layer is returned.
1350 * @return selected primitives, while draw action is in progress
1351 */
1352 public Collection<OsmPrimitive> getInProgressSelection() {
1353 DataSet ds = getLayerManager().getEditDataSet();
1354 if (ds == null) return Collections.emptyList();
1355 if (getCurrentBaseNode() != null && !ds.selectionEmpty()) {
1356 Way continueFrom = getWayForNode(getCurrentBaseNode());
1357 if (continueFrom != null)
1358 return Collections.<OsmPrimitive>singleton(continueFrom);
1359 }
1360 return ds.getSelected();
1361 }
1362
1363 @Override
1364 public boolean layerIsSupported(Layer l) {
1365 return isEditableDataLayer(l);
1366 }
1367
1368 @Override
1369 protected void updateEnabledState() {
1370 setEnabled(getLayerManager().getEditLayer() != null);
1371 }
1372
1373 @Override
1374 public void destroy() {
1375 super.destroy();
1376 finishDrawing();
1377 snapChangeAction.destroy();
1378 }
1379
1380 /**
1381 * Undo the last command. Binded by default to backspace key.
1382 */
1383 public class BackSpaceAction extends AbstractAction {
1384
1385 @Override
1386 public void actionPerformed(ActionEvent e) {
1387 UndoRedoHandler.getInstance().undo();
1388 Command lastCmd = UndoRedoHandler.getInstance().getLastCommand();
1389 if (lastCmd == null) return;
1390 Node n = null;
1391 for (OsmPrimitive p: lastCmd.getParticipatingPrimitives()) {
1392 if (p instanceof Node) {
1393 if (n == null) {
1394 n = (Node) p; // found one node
1395 wayIsFinished = false;
1396 } else {
1397 // if more than 1 node were affected by previous command,
1398 // we have no way to continue, so we forget about found node
1399 n = null;
1400 break;
1401 }
1402 }
1403 }
1404 // select last added node - maybe we will continue drawing from it
1405 if (n != null) {
1406 addSelection(getLayerManager().getEditDataSet(), n);
1407 }
1408 }
1409 }
1410
1411 private class SnapChangeAction extends JosmAction {
1412 /**
1413 * Constructs a new {@code SnapChangeAction}.
1414 */
1415 SnapChangeAction() {
1416 super(tr("Angle snapping"), /* ICON() */ "anglesnap",
1417 tr("Switch angle snapping mode while drawing"), null, false);
1418 setHelpId(ht("/Action/Draw/AngleSnap"));
1419 }
1420
1421 @Override
1422 public void actionPerformed(ActionEvent e) {
1423 if (snapHelper != null) {
1424 snapHelper.toggleSnapping();
1425 }
1426 }
1427
1428 @Override
1429 protected void updateEnabledState() {
1430 MapFrame map = MainApplication.getMap();
1431 setEnabled(map != null && map.mapMode instanceof DrawAction);
1432 }
1433 }
1434}
Note: See TracBrowser for help on using the repository browser.