source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/SelectAction.java@ 7224

Last change on this file since 7224 was 7218, checked in by akks, 10 years ago

fix #3910: toggle lasso mode on repeating S key
can be turned of with mappaint.select.toggle-lasso-on-repeated-S
  • Property svn:eol-style set to native
File size: 46.4 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.tr;
6import static org.openstreetmap.josm.tools.I18n.trn;
7
8import java.awt.Cursor;
9import java.awt.Point;
10import java.awt.Rectangle;
11import java.awt.event.ActionEvent;
12import java.awt.event.ActionListener;
13import java.awt.event.KeyEvent;
14import java.awt.event.MouseEvent;
15import java.awt.geom.Point2D;
16import java.util.Collection;
17import java.util.Collections;
18import java.util.HashSet;
19import java.util.Iterator;
20import java.util.LinkedList;
21import java.util.Set;
22
23import javax.swing.JOptionPane;
24
25import org.openstreetmap.josm.Main;
26import org.openstreetmap.josm.actions.MergeNodesAction;
27import org.openstreetmap.josm.command.AddCommand;
28import org.openstreetmap.josm.command.ChangeCommand;
29import org.openstreetmap.josm.command.Command;
30import org.openstreetmap.josm.command.MoveCommand;
31import org.openstreetmap.josm.command.RotateCommand;
32import org.openstreetmap.josm.command.ScaleCommand;
33import org.openstreetmap.josm.command.SequenceCommand;
34import org.openstreetmap.josm.data.coor.EastNorth;
35import org.openstreetmap.josm.data.coor.LatLon;
36import org.openstreetmap.josm.data.osm.DataSet;
37import org.openstreetmap.josm.data.osm.Node;
38import org.openstreetmap.josm.data.osm.OsmPrimitive;
39import org.openstreetmap.josm.data.osm.Way;
40import org.openstreetmap.josm.data.osm.WaySegment;
41import org.openstreetmap.josm.data.osm.visitor.AllNodesVisitor;
42import org.openstreetmap.josm.data.osm.visitor.paint.WireframeMapRenderer;
43import org.openstreetmap.josm.gui.ExtendedDialog;
44import org.openstreetmap.josm.gui.MapFrame;
45import org.openstreetmap.josm.gui.MapView;
46import org.openstreetmap.josm.gui.SelectionManager;
47import org.openstreetmap.josm.gui.SelectionManager.SelectionEnded;
48import org.openstreetmap.josm.gui.layer.Layer;
49import org.openstreetmap.josm.gui.layer.OsmDataLayer;
50import org.openstreetmap.josm.gui.util.GuiHelper;
51import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
52import org.openstreetmap.josm.gui.util.ModifierListener;
53import org.openstreetmap.josm.tools.ImageProvider;
54import org.openstreetmap.josm.tools.Pair;
55import org.openstreetmap.josm.tools.Shortcut;
56
57/**
58 * Move is an action that can move all kind of OsmPrimitives (except keys for now).
59 *
60 * If an selected object is under the mouse when dragging, move all selected objects.
61 * If an unselected object is under the mouse when dragging, it becomes selected
62 * and will be moved.
63 * If no object is under the mouse, move all selected objects (if any)
64 *
65 * On Mac OS X, Ctrl + mouse button 1 simulates right click (map move), so the
66 * feature "selection remove" is disabled on this platform.
67 */
68public class SelectAction extends MapMode implements ModifierListener, KeyPressReleaseListener, SelectionEnded {
69 // "select" means the selection rectangle and "move" means either dragging
70 // or select if no mouse movement occurs (i.e. just clicking)
71 enum Mode { move, rotate, scale, select }
72
73 // contains all possible cases the cursor can be in the SelectAction
74 private static enum SelectActionCursor {
75 rect("normal", "selection"),
76 rect_add("normal", "select_add"),
77 rect_rm("normal", "select_remove"),
78 way("normal", "select_way"),
79 way_add("normal", "select_way_add"),
80 way_rm("normal", "select_way_remove"),
81 node("normal", "select_node"),
82 node_add("normal", "select_node_add"),
83 node_rm("normal", "select_node_remove"),
84 virtual_node("normal", "addnode"),
85 scale("scale", null),
86 rotate("rotate", null),
87 merge("crosshair", null),
88 lasso("normal", "rope"),
89 merge_to_node("crosshair", "joinnode"),
90 move(Cursor.MOVE_CURSOR);
91
92 private final Cursor c;
93 private SelectActionCursor(String main, String sub) {
94 c = ImageProvider.getCursor(main, sub);
95 }
96 private SelectActionCursor(int systemCursor) {
97 c = Cursor.getPredefinedCursor(systemCursor);
98 }
99 public Cursor cursor() {
100 return c;
101 }
102 }
103
104 private boolean lassoMode = false;
105 public boolean repeatedKeySwitchLassoOption;
106
107 // Cache previous mouse event (needed when only the modifier keys are
108 // pressed but the mouse isn't moved)
109 private MouseEvent oldEvent = null;
110
111 private Mode mode = null;
112 private final SelectionManager selectionManager;
113 private boolean cancelDrawMode = false;
114 private boolean drawTargetHighlight;
115 private boolean didMouseDrag = false;
116 /**
117 * The component this SelectAction is associated with.
118 */
119 private final MapView mv;
120 /**
121 * The old cursor before the user pressed the mouse button.
122 */
123 private Point startingDraggingPos;
124 /**
125 * point where user pressed the mouse to start movement
126 */
127 EastNorth startEN;
128 /**
129 * The last known position of the mouse.
130 */
131 private Point lastMousePos;
132 /**
133 * The time of the user mouse down event.
134 */
135 private long mouseDownTime = 0;
136 /**
137 * The pressed button of the user mouse down event.
138 */
139 private int mouseDownButton = 0;
140 /**
141 * The time of the user mouse down event.
142 */
143 private long mouseReleaseTime = 0;
144 /**
145 * The time which needs to pass between click and release before something
146 * counts as a move, in milliseconds
147 */
148 private int initialMoveDelay;
149 /**
150 * The screen distance which needs to be travelled before something
151 * counts as a move, in pixels
152 */
153 private int initialMoveThreshold;
154 private boolean initialMoveThresholdExceeded = false;
155
156 /**
157 * elements that have been highlighted in the previous iteration. Used
158 * to remove the highlight from them again as otherwise the whole data
159 * set would have to be checked.
160 */
161 private Set<OsmPrimitive> oldHighlights = new HashSet<>();
162
163 /**
164 * Create a new SelectAction
165 * @param mapFrame The MapFrame this action belongs to.
166 */
167 public SelectAction(MapFrame mapFrame) {
168 super(tr("Select"), "move/move", tr("Select, move, scale and rotate objects"),
169 Shortcut.registerShortcut("mapmode:select", tr("Mode: {0}", tr("Select")), KeyEvent.VK_S, Shortcut.DIRECT),
170 mapFrame,
171 ImageProvider.getCursor("normal", "selection"));
172 mv = mapFrame.mapView;
173 putValue("help", ht("/Action/Select"));
174 selectionManager = new SelectionManager(this, false, mv);
175 }
176
177 @Override
178 public void enterMode() {
179 super.enterMode();
180 mv.addMouseListener(this);
181 mv.addMouseMotionListener(this);
182 mv.setVirtualNodesEnabled(Main.pref.getInteger("mappaint.node.virtual-size", 8) != 0);
183 drawTargetHighlight = Main.pref.getBoolean("draw.target-highlight", true);
184 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
185 initialMoveThreshold = Main.pref.getInteger("edit.initial-move-threshold", 5);
186 repeatedKeySwitchLassoOption = Main.pref.getBoolean("mappaint.select.toggle-lasso-on-repeated-S", true);
187 cycleManager.init();
188 virtualManager.init();
189 // This is required to update the cursors when ctrl/shift/alt is pressed
190 Main.map.keyDetector.addModifierListener(this);
191 Main.map.keyDetector.addKeyListener(this);
192 }
193
194 @Override
195 public void exitMode() {
196 super.exitMode();
197 selectionManager.unregister(mv);
198 mv.removeMouseListener(this);
199 mv.removeMouseMotionListener(this);
200 mv.setVirtualNodesEnabled(false);
201 Main.map.keyDetector.removeModifierListener(this);
202 Main.map.keyDetector.removeKeyListener(this);
203 removeHighlighting();
204 }
205
206 int previousModifiers;
207
208 @Override
209 public void modifiersChanged(int modifiers) {
210 if (!Main.isDisplayingMapView() || oldEvent==null) return;
211 if(giveUserFeedback(oldEvent, modifiers)) {
212 mv.repaint();
213 }
214 }
215
216 /**
217 * handles adding highlights and updating the cursor for the given mouse event.
218 * Please note that the highlighting for merging while moving is handled via mouseDragged.
219 * @param e {@code MouseEvent} which should be used as base for the feedback
220 * @return {@code true} if repaint is required
221 */
222 private boolean giveUserFeedback(MouseEvent e) {
223 return giveUserFeedback(e, e.getModifiers());
224 }
225
226 /**
227 * handles adding highlights and updating the cursor for the given mouse event.
228 * Please note that the highlighting for merging while moving is handled via mouseDragged.
229 * @param e {@code MouseEvent} which should be used as base for the feedback
230 * @param modifiers define custom keyboard modifiers if the ones from MouseEvent are outdated or similar
231 * @return {@code true} if repaint is required
232 */
233 private boolean giveUserFeedback(MouseEvent e, int modifiers) {
234 Collection<OsmPrimitive> c = asColl(
235 mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true));
236
237 updateKeyModifiers(modifiers);
238 determineMapMode(!c.isEmpty());
239
240 HashSet<OsmPrimitive> newHighlights = new HashSet<>();
241
242 virtualManager.clear();
243 if(mode == Mode.move) {
244 if (!dragInProgress() && virtualManager.activateVirtualNodeNearPoint(e.getPoint())) {
245 DataSet ds = getCurrentDataSet();
246 if (ds != null && drawTargetHighlight) {
247 ds.setHighlightedVirtualNodes(virtualManager.virtualWays);
248 }
249 mv.setNewCursor(SelectActionCursor.virtual_node.cursor(), this);
250 // don't highlight anything else if a virtual node will be
251 return repaintIfRequired(newHighlights);
252 }
253 }
254
255 mv.setNewCursor(getCursor(c), this);
256
257 // return early if there can't be any highlights
258 if(!drawTargetHighlight || mode != Mode.move || c.isEmpty())
259 return repaintIfRequired(newHighlights);
260
261 // CTRL toggles selection, but if while dragging CTRL means merge
262 final boolean isToggleMode = ctrl && !dragInProgress();
263 for(OsmPrimitive x : c) {
264 // only highlight primitives that will change the selection
265 // when clicked. I.e. don't highlight selected elements unless
266 // we are in toggle mode.
267 if(isToggleMode || !x.isSelected()) {
268 newHighlights.add(x);
269 }
270 }
271 return repaintIfRequired(newHighlights);
272 }
273
274 /**
275 * works out which cursor should be displayed for most of SelectAction's
276 * features. The only exception is the "move" cursor when actually dragging
277 * primitives.
278 * @param nearbyStuff primitives near the cursor
279 * @return the cursor that should be displayed
280 */
281 private Cursor getCursor(Collection<OsmPrimitive> nearbyStuff) {
282 String c = "rect";
283 switch(mode) {
284 case move:
285 if(virtualManager.hasVirtualNode()) {
286 c = "virtual_node";
287 break;
288 }
289 final Iterator<OsmPrimitive> it = nearbyStuff.iterator();
290 final OsmPrimitive osm = it.hasNext() ? it.next() : null;
291
292 if(dragInProgress()) {
293 // only consider merge if ctrl is pressed and there are nodes in
294 // the selection that could be merged
295 if(!ctrl || getCurrentDataSet().getSelectedNodes().isEmpty()) {
296 c = "move";
297 break;
298 }
299 // only show merge to node cursor if nearby node and that node is currently
300 // not being dragged
301 final boolean hasTarget = osm instanceof Node && !osm.isSelected();
302 c = hasTarget ? "merge_to_node" : "merge";
303 break;
304 }
305
306 c = (osm instanceof Node) ? "node" : c;
307 c = (osm instanceof Way) ? "way" : c;
308 if(shift) {
309 c += "_add";
310 } else if(ctrl) {
311 c += osm == null || osm.isSelected() ? "_rm" : "_add";
312 }
313 break;
314 case rotate:
315 c = "rotate";
316 break;
317 case scale:
318 c = "scale";
319 break;
320 case select:
321 if (lassoMode) {
322 c = "lasso";
323 } else {
324 c = "rect" + (shift ? "_add" : (ctrl && !Main.isPlatformOsx() ? "_rm" : ""));
325 }
326 break;
327 }
328 return SelectActionCursor.valueOf(c).cursor();
329 }
330
331 /**
332 * Removes all existing highlights.
333 * @return true if a repaint is required
334 */
335 private boolean removeHighlighting() {
336 boolean needsRepaint = false;
337 DataSet ds = getCurrentDataSet();
338 if(ds != null && !ds.getHighlightedVirtualNodes().isEmpty()) {
339 needsRepaint = true;
340 ds.clearHighlightedVirtualNodes();
341 }
342 if(oldHighlights.isEmpty())
343 return needsRepaint;
344
345 for(OsmPrimitive prim : oldHighlights) {
346 prim.setHighlighted(false);
347 }
348 oldHighlights = new HashSet<>();
349 return true;
350 }
351
352 private boolean repaintIfRequired(Set<OsmPrimitive> newHighlights) {
353 if(!drawTargetHighlight)
354 return false;
355
356 boolean needsRepaint = false;
357 for(OsmPrimitive x : newHighlights) {
358 if(oldHighlights.contains(x)) {
359 continue;
360 }
361 needsRepaint = true;
362 x.setHighlighted(true);
363 }
364 oldHighlights.removeAll(newHighlights);
365 for(OsmPrimitive x : oldHighlights) {
366 x.setHighlighted(false);
367 needsRepaint = true;
368 }
369 oldHighlights = newHighlights;
370 return needsRepaint;
371 }
372
373 /**
374 * Look, whether any object is selected. If not, select the nearest node.
375 * If there are no nodes in the dataset, do nothing.
376 *
377 * If the user did not press the left mouse button, do nothing.
378 *
379 * Also remember the starting position of the movement and change the mouse
380 * cursor to movement.
381 */
382 @Override
383 public void mousePressed(MouseEvent e) {
384 mouseDownButton = e.getButton();
385 // return early
386 if (!mv.isActiveLayerVisible() || !(Boolean) this.getValue("active") || mouseDownButton != MouseEvent.BUTTON1)
387 return;
388
389 // left-button mouse click only is processed here
390
391 // request focus in order to enable the expected keyboard shortcuts
392 mv.requestFocus();
393
394 // update which modifiers are pressed (shift, alt, ctrl)
395 updateKeyModifiers(e);
396
397 // We don't want to change to draw tool if the user tries to (de)select
398 // stuff but accidentally clicks in an empty area when selection is empty
399 cancelDrawMode = (shift || ctrl);
400 didMouseDrag = false;
401 initialMoveThresholdExceeded = false;
402 mouseDownTime = System.currentTimeMillis();
403 lastMousePos = e.getPoint();
404 startEN = mv.getEastNorth(lastMousePos.x,lastMousePos.y);
405
406 // primitives under cursor are stored in c collection
407
408 OsmPrimitive nearestPrimitive = mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true);
409
410 determineMapMode(nearestPrimitive!=null);
411
412 switch(mode) {
413 case rotate:
414 case scale:
415 // if nothing was selected, select primitive under cursor for scaling or rotating
416 if (getCurrentDataSet().getSelected().isEmpty()) {
417 getCurrentDataSet().setSelected(asColl(nearestPrimitive));
418 }
419
420 // Mode.select redraws when selectPrims is called
421 // Mode.move redraws when mouseDragged is called
422 // Mode.rotate redraws here
423 // Mode.scale redraws here
424 break;
425 case move:
426 // also include case when some primitive is under cursor and no shift+ctrl / alt+ctrl is pressed
427 // so this is not movement, but selection on primitive under cursor
428 if (!cancelDrawMode && nearestPrimitive instanceof Way) {
429 virtualManager.activateVirtualNodeNearPoint(e.getPoint());
430 }
431 OsmPrimitive toSelect = cycleManager.cycleSetup(nearestPrimitive, e.getPoint());
432 selectPrims(asColl(toSelect), false, false);
433 useLastMoveCommandIfPossible();
434 // Schedule a timer to update status line "initialMoveDelay+1" ms in the future
435 GuiHelper.scheduleTimer(initialMoveDelay+1, new ActionListener() {
436 @Override
437 public void actionPerformed(ActionEvent evt) {
438 updateStatusLine();
439 }
440 }, false);
441 break;
442 case select:
443 default:
444 if (!(ctrl && Main.isPlatformOsx())) {
445 // start working with rectangle or lasso
446 selectionManager.register(mv, lassoMode);
447 selectionManager.mousePressed(e);
448 break;
449 }
450 }
451 if (giveUserFeedback(e)) {
452 mv.repaint();
453 }
454 updateStatusLine();
455 }
456
457 @Override
458 public void mouseMoved(MouseEvent e) {
459 // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
460 if (Main.isPlatformOsx() && (mode == Mode.rotate || mode == Mode.scale)) {
461 mouseDragged(e);
462 return;
463 }
464 oldEvent = e;
465 if(giveUserFeedback(e)) {
466 mv.repaint();
467 }
468 }
469
470 /**
471 * If the left mouse button is pressed, move all currently selected
472 * objects (if one of them is under the mouse) or the current one under the
473 * mouse (which will become selected).
474 */
475 @Override
476 public void mouseDragged(MouseEvent e) {
477 if (!mv.isActiveLayerVisible())
478 return;
479
480 // Swing sends random mouseDragged events when closing dialogs by double-clicking their top-left icon on Windows
481 // Ignore such false events to prevent issues like #7078
482 if (mouseDownButton == MouseEvent.BUTTON1 && mouseReleaseTime > mouseDownTime)
483 return;
484
485 cancelDrawMode = true;
486 if (mode == Mode.select) {
487 // Unregisters selectionManager if ctrl has been pressed after mouse click on Mac OS X in order to move the map
488 if (ctrl && Main.isPlatformOsx()) {
489 selectionManager.unregister(mv);
490 mv.requestClearRect();
491 // Make sure correct cursor is displayed
492 mv.setNewCursor(Cursor.MOVE_CURSOR, this);
493 }
494 return;
495 }
496
497 // do not count anything as a move if it lasts less than 100 milliseconds.
498 if ((mode == Mode.move) && (System.currentTimeMillis() - mouseDownTime < initialMoveDelay))
499 return;
500
501 if (mode != Mode.rotate && mode != Mode.scale) // button is pressed in rotate mode
502 {
503 if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == 0)
504 return;
505 }
506
507 if (mode == Mode.move) {
508 // If ctrl is pressed we are in merge mode. Look for a nearby node,
509 // highlight it and adjust the cursor accordingly.
510 final boolean canMerge = ctrl && !getCurrentDataSet().getSelectedNodes().isEmpty();
511 final OsmPrimitive p = canMerge ? (OsmPrimitive)findNodeToMergeTo(e.getPoint()) : null;
512 boolean needsRepaint = removeHighlighting();
513 if(p != null) {
514 p.setHighlighted(true);
515 oldHighlights.add(p);
516 needsRepaint = true;
517 }
518 mv.setNewCursor(getCursor(asColl(p)), this);
519 // also update the stored mouse event, so we can display the correct cursor
520 // when dragging a node onto another one and then press CTRL to merge
521 oldEvent = e;
522 if(needsRepaint) {
523 mv.repaint();
524 }
525 }
526
527 if (startingDraggingPos == null) {
528 startingDraggingPos = new Point(e.getX(), e.getY());
529 }
530
531 if( lastMousePos == null ) {
532 lastMousePos = e.getPoint();
533 return;
534 }
535
536 if (!initialMoveThresholdExceeded) {
537 int dp = (int) lastMousePos.distance(e.getX(), e.getY());
538 if (dp < initialMoveThreshold)
539 return; // ignore small drags
540 initialMoveThresholdExceeded = true; //no more ingnoring uintil nex mouse press
541 }
542 if (e.getPoint().equals(lastMousePos))
543 return;
544
545 EastNorth currentEN = mv.getEastNorth(e.getX(), e.getY());
546
547 if (virtualManager.hasVirtualWaysToBeConstructed()) {
548 virtualManager.createMiddleNodeFromVirtual(currentEN);
549 } else {
550 if (!updateCommandWhileDragging(currentEN)) return;
551 }
552
553 mv.repaint();
554 if (mode != Mode.scale) {
555 lastMousePos = e.getPoint();
556 }
557
558 didMouseDrag = true;
559 }
560
561 @Override
562 public void mouseExited(MouseEvent e) {
563 if(removeHighlighting()) {
564 mv.repaint();
565 }
566 }
567
568 @Override
569 public void mouseReleased(MouseEvent e) {
570 if (!mv.isActiveLayerVisible())
571 return;
572
573 startingDraggingPos = null;
574 mouseReleaseTime = System.currentTimeMillis();
575
576 if (mode == Mode.select) {
577 selectionManager.unregister(mv);
578
579 // Select Draw Tool if no selection has been made
580 if (getCurrentDataSet().getSelected().isEmpty() && !cancelDrawMode) {
581 Main.map.selectDrawTool(true);
582 updateStatusLine();
583 return;
584 }
585 }
586
587 if (mode == Mode.move && e.getButton() == MouseEvent.BUTTON1) {
588 if (!didMouseDrag) {
589 // only built in move mode
590 virtualManager.clear();
591 // do nothing if the click was to short too be recognized as a drag,
592 // but the release position is farther than 10px away from the press position
593 if (lastMousePos == null || lastMousePos.distanceSq(e.getPoint()) < 100) {
594 updateKeyModifiers(e);
595 selectPrims(cycleManager.cyclePrims(), true, false);
596
597 // If the user double-clicked a node, change to draw mode
598 Collection<OsmPrimitive> c = getCurrentDataSet().getSelected();
599 if (e.getClickCount() >= 2 && c.size() == 1 && c.iterator().next() instanceof Node) {
600 // We need to do it like this as otherwise drawAction will see a double
601 // click and switch back to SelectMode
602 Main.worker.execute(new Runnable() {
603 @Override
604 public void run() {
605 Main.map.selectDrawTool(true);
606 }
607 });
608 return;
609 }
610 }
611 } else {
612 confirmOrUndoMovement(e);
613 }
614 }
615
616 mode = null;
617
618 // simply remove any highlights if the middle click popup is active because
619 // the highlights don't depend on the cursor position there. If something was
620 // selected beforehand this would put us into move mode as well, which breaks
621 // the cycling through primitives on top of each other (see #6739).
622 if(e.getButton() == MouseEvent.BUTTON2) {
623 removeHighlighting();
624 } else {
625 giveUserFeedback(e);
626 }
627 updateStatusLine();
628 }
629
630 @Override
631 public void selectionEnded(Rectangle r, MouseEvent e) {
632 updateKeyModifiers(e);
633 selectPrims(selectionManager.getSelectedObjects(alt), true, true);
634 }
635
636 @Override
637 public void doKeyPressed(KeyEvent e) {
638 if (!Main.isDisplayingMapView() ||
639 !repeatedKeySwitchLassoOption || !getShortcut().isEvent(e)) return;
640 e.consume();
641 if (!lassoMode) {
642 Main.map.selectMapMode(Main.map.mapModeSelectLasso);
643 } else {
644 Main.map.selectMapMode(Main.map.mapModeSelect);
645 }
646 }
647
648 @Override
649 public void doKeyReleased(KeyEvent e) {
650 }
651
652 /**
653 * sets the mapmode according to key modifiers and if there are any
654 * selectables nearby. Everything has to be pre-determined for this
655 * function; its main purpose is to centralize what the modifiers do.
656 * @param hasSelectionNearby
657 */
658 private void determineMapMode(boolean hasSelectionNearby) {
659 if (shift && ctrl) {
660 mode = Mode.rotate;
661 } else if (alt && ctrl) {
662 mode = Mode.scale;
663 } else if (hasSelectionNearby || dragInProgress()) {
664 mode = Mode.move;
665 } else {
666 mode = Mode.select;
667 }
668 }
669
670 /** returns true whenever elements have been grabbed and moved (i.e. the initial
671 * thresholds have been exceeded) and is still in progress (i.e. mouse button
672 * still pressed)
673 */
674 private final boolean dragInProgress() {
675 return didMouseDrag && startingDraggingPos != null;
676 }
677
678 /**
679 * Create or update data modification command while dragging mouse - implementation of
680 * continuous moving, scaling and rotation
681 * @param currentEN - mouse position
682 * @return status of action (<code>true</code> when action was performed)
683 */
684 private boolean updateCommandWhileDragging(EastNorth currentEN) {
685 // Currently we support only transformations which do not affect relations.
686 // So don't add them in the first place to make handling easier
687 Collection<OsmPrimitive> selection = getCurrentDataSet().getSelectedNodesAndWays();
688 if (selection.isEmpty()) { // if nothing was selected to drag, just select nearest node/way to the cursor
689 OsmPrimitive nearestPrimitive = mv.getNearestNodeOrWay(mv.getPoint(startEN), OsmPrimitive.isSelectablePredicate, true);
690 getCurrentDataSet().setSelected(nearestPrimitive);
691 }
692
693 Collection<Node> affectedNodes = AllNodesVisitor.getAllNodes(selection);
694 // for these transformations, having only one node makes no sense - quit silently
695 if (affectedNodes.size() < 2 && (mode == Mode.rotate || mode == Mode.scale)) {
696 return false;
697 }
698 Command c = getLastCommand();
699 if (mode == Mode.move) {
700 if (startEN == null) return false; // fix #8128
701 getCurrentDataSet().beginUpdate();
702 if (c instanceof MoveCommand && affectedNodes.equals(((MoveCommand) c).getParticipatingPrimitives())) {
703 ((MoveCommand) c).saveCheckpoint();
704 ((MoveCommand) c).applyVectorTo(currentEN);
705 } else {
706 Main.main.undoRedo.add(
707 c = new MoveCommand(selection, startEN, currentEN));
708 }
709 for (Node n : affectedNodes) {
710 LatLon ll = n.getCoor();
711 if (ll != null && ll.isOutSideWorld()) {
712 // Revert move
713 ((MoveCommand) c).resetToCheckpoint();
714 getCurrentDataSet().endUpdate();
715 JOptionPane.showMessageDialog(
716 Main.parent,
717 tr("Cannot move objects outside of the world."),
718 tr("Warning"),
719 JOptionPane.WARNING_MESSAGE);
720 mv.setNewCursor(cursor, this);
721 return false;
722 }
723 }
724 } else {
725 startEN = currentEN; // drag can continue after scaling/rotation
726
727 if (mode != Mode.rotate && mode != Mode.scale) {
728 return false;
729 }
730
731 getCurrentDataSet().beginUpdate();
732
733 if (mode == Mode.rotate) {
734 if (c instanceof RotateCommand && affectedNodes.equals(((RotateCommand) c).getTransformedNodes())) {
735 ((RotateCommand) c).handleEvent(currentEN);
736 } else {
737 Main.main.undoRedo.add(new RotateCommand(selection, currentEN));
738 }
739 } else if (mode == Mode.scale) {
740 if (c instanceof ScaleCommand && affectedNodes.equals(((ScaleCommand) c).getTransformedNodes())) {
741 ((ScaleCommand) c).handleEvent(currentEN);
742 } else {
743 Main.main.undoRedo.add(new ScaleCommand(selection, currentEN));
744 }
745 }
746
747 Collection<Way> ways = getCurrentDataSet().getSelectedWays();
748 if (doesImpactStatusLine(affectedNodes, ways)) {
749 Main.map.statusLine.setDist(ways);
750 }
751 }
752 getCurrentDataSet().endUpdate();
753 return true;
754 }
755
756 private boolean doesImpactStatusLine(Collection<Node> affectedNodes, Collection<Way> selectedWays) {
757 for (Way w : selectedWays) {
758 for (Node n : w.getNodes()) {
759 if (affectedNodes.contains(n)) {
760 return true;
761 }
762 }
763 }
764 return false;
765 }
766
767 /**
768 * Adapt last move command (if it is suitable) to work with next drag, started at point startEN
769 */
770 private void useLastMoveCommandIfPossible() {
771 Command c = getLastCommand();
772 Collection<Node> affectedNodes = AllNodesVisitor.getAllNodes(getCurrentDataSet().getSelected());
773 if (c instanceof MoveCommand && affectedNodes.equals(((MoveCommand) c).getParticipatingPrimitives())) {
774 // old command was created with different base point of movement, we need to recalculate it
775 ((MoveCommand) c).changeStartPoint(startEN);
776 }
777 }
778
779 /**
780 * Obtain command in undoRedo stack to "continue" when dragging
781 */
782 private Command getLastCommand() {
783 Command c = !Main.main.undoRedo.commands.isEmpty()
784 ? Main.main.undoRedo.commands.getLast() : null;
785 if (c instanceof SequenceCommand) {
786 c = ((SequenceCommand) c).getLastCommand();
787 }
788 return c;
789 }
790
791 /**
792 * Present warning in case of large and possibly unwanted movements and undo
793 * unwanted movements.
794 *
795 * @param e the mouse event causing the action (mouse released)
796 */
797 private void confirmOrUndoMovement(MouseEvent e) {
798 int max = Main.pref.getInteger("warn.move.maxelements", 20), limit = max;
799 for (OsmPrimitive osm : getCurrentDataSet().getSelected()) {
800 if (osm instanceof Way) {
801 limit -= ((Way) osm).getNodes().size();
802 }
803 if ((limit -= 1) < 0) {
804 break;
805 }
806 }
807 if (limit < 0) {
808 ExtendedDialog ed = new ExtendedDialog(
809 Main.parent,
810 tr("Move elements"),
811 new String[]{tr("Move them"), tr("Undo move")});
812 ed.setButtonIcons(new String[]{"reorder.png", "cancel.png"});
813 ed.setContent(
814 /* for correct i18n of plural forms - see #9110 */
815 trn(
816 "You moved more than {0} element. " + "Moving a large number of elements is often an error.\n" + "Really move them?",
817 "You moved more than {0} elements. " + "Moving a large number of elements is often an error.\n" + "Really move them?",
818 max, max));
819 ed.setCancelButton(2);
820 ed.toggleEnable("movedManyElements");
821 ed.showDialog();
822
823 if (ed.getValue() != 1) {
824 Main.main.undoRedo.undo();
825 }
826 } else {
827 // if small number of elements were moved,
828 updateKeyModifiers(e);
829 if (ctrl) mergePrims(e.getPoint());
830 }
831 getCurrentDataSet().fireSelectionChanged();
832 }
833
834 /**
835 * Merges the selected nodes to the one closest to the given mouse position if the control
836 * key is pressed. If there is no such node, no action will be done and no error will be
837 * reported. If there is, it will execute the merge and add it to the undo buffer.
838 */
839 private final void mergePrims(Point p) {
840 Collection<Node> selNodes = getCurrentDataSet().getSelectedNodes();
841 if (selNodes.isEmpty())
842 return;
843
844 Node target = findNodeToMergeTo(p);
845 if (target == null)
846 return;
847
848 Collection<Node> nodesToMerge = new LinkedList<>(selNodes);
849 nodesToMerge.add(target);
850 MergeNodesAction.doMergeNodes(Main.main.getEditLayer(), nodesToMerge, target);
851 }
852
853 /**
854 * Tries to find a node to merge to when in move-merge mode for the current mouse
855 * position. Either returns the node or null, if no suitable one is nearby.
856 */
857 private final Node findNodeToMergeTo(Point p) {
858 Collection<Node> target = mv.getNearestNodes(p,
859 getCurrentDataSet().getSelectedNodes(),
860 OsmPrimitive.isSelectablePredicate);
861 return target.isEmpty() ? null : target.iterator().next();
862 }
863
864 private void selectPrims(Collection<OsmPrimitive> prims, boolean released, boolean area) {
865 DataSet ds = getCurrentDataSet();
866
867 // not allowed together: do not change dataset selection, return early
868 // Virtual Ways: if non-empty the cursor is above a virtual node. So don't highlight
869 // anything if about to drag the virtual node (i.e. !released) but continue if the
870 // cursor is only released above a virtual node by accident (i.e. released). See #7018
871 if (ds == null || (shift && ctrl) || (ctrl && !released) || (virtualManager.hasVirtualWaysToBeConstructed() && !released))
872 return;
873
874 if (!released) {
875 // Don't replace the selection if the user clicked on a
876 // selected object (it breaks moving of selected groups).
877 // Do it later, on mouse release.
878 shift |= ds.getSelected().containsAll(prims);
879 }
880
881 if (ctrl) {
882 // Ctrl on an item toggles its selection status,
883 // but Ctrl on an *area* just clears those items
884 // out of the selection.
885 if (area) {
886 ds.clearSelection(prims);
887 } else {
888 ds.toggleSelected(prims);
889 }
890 } else if (shift) {
891 // add prims to an existing selection
892 ds.addSelected(prims);
893 } else {
894 // clear selection, then select the prims clicked
895 ds.setSelected(prims);
896 }
897 }
898
899 @Override
900 public String getModeHelpText() {
901 if (mouseDownButton == MouseEvent.BUTTON1 && mouseReleaseTime < mouseDownTime) {
902 if (mode == Mode.select)
903 return tr("Release the mouse button to select the objects in the rectangle.");
904 else if (mode == Mode.move && (System.currentTimeMillis() - mouseDownTime >= initialMoveDelay)) {
905 final boolean canMerge = getCurrentDataSet()!=null && !getCurrentDataSet().getSelectedNodes().isEmpty();
906 final String mergeHelp = canMerge ? (" " + tr("Ctrl to merge with nearest node.")) : "";
907 return tr("Release the mouse button to stop moving.") + mergeHelp;
908 } else if (mode == Mode.rotate)
909 return tr("Release the mouse button to stop rotating.");
910 else if (mode == Mode.scale)
911 return tr("Release the mouse button to stop scaling.");
912 }
913 return tr("Move objects by dragging; Shift to add to selection (Ctrl to toggle); Shift-Ctrl to rotate selected; Alt-Ctrl to scale selected; or change selection");
914 }
915
916 @Override
917 public boolean layerIsSupported(Layer l) {
918 return l instanceof OsmDataLayer;
919 }
920
921 /**
922 * Enable or diable the lasso mode
923 * @param lassoMode true to enable the lasso mode, false otherwise
924 */
925 public void setLassoMode(boolean lassoMode) {
926 this.selectionManager.setLassoMode(lassoMode);
927 this.lassoMode = lassoMode;
928 }
929
930 CycleManager cycleManager = new CycleManager();
931 VirtualManager virtualManager = new VirtualManager();
932
933 private class CycleManager {
934
935 private Collection<OsmPrimitive> cycleList = Collections.emptyList();
936 private boolean cyclePrims = false;
937 private OsmPrimitive cycleStart = null;
938 private boolean waitForMouseUpParameter;
939 private boolean multipleMatchesParameter;
940 /**
941 * read preferences
942 */
943 private void init() {
944 waitForMouseUpParameter = Main.pref.getBoolean("mappaint.select.waits-for-mouse-up", false);
945 multipleMatchesParameter = Main.pref.getBoolean("selectaction.cycles.multiple.matches", false);
946 }
947
948 /**
949 * Determine primitive to be selected and build cycleList
950 * @param nearest primitive found by simple method
951 * @param p point where user clicked
952 * @return OsmPrimitive to be selected
953 */
954 private OsmPrimitive cycleSetup(OsmPrimitive nearest, Point p) {
955 OsmPrimitive osm = null;
956
957 if (nearest != null) {
958 osm = nearest;
959
960 if (!(alt || multipleMatchesParameter)) {
961 // no real cycling, just one element in cycle list
962 cycleList = asColl(osm);
963
964 if (waitForMouseUpParameter) {
965 // prefer a selected nearest node or way, if possible
966 osm = mv.getNearestNodeOrWay(p, OsmPrimitive.isSelectablePredicate, true);
967 }
968 } else {
969 // Alt + left mouse button pressed: we need to build cycle list
970 cycleList = mv.getAllNearest(p, OsmPrimitive.isSelectablePredicate);
971
972 if (cycleList.size() > 1) {
973 cyclePrims = false;
974
975 // find first already selected element in cycle list
976 OsmPrimitive old = osm;
977 for (OsmPrimitive o : cycleList) {
978 if (o.isSelected()) {
979 cyclePrims = true;
980 osm = o;
981 break;
982 }
983 }
984
985 // special case: for cycle groups of 2, we can toggle to the
986 // true nearest primitive on mousePressed right away
987 if (cycleList.size() == 2 && !waitForMouseUpParameter) {
988 if (!(osm.equals(old) || osm.isNew() || ctrl)) {
989 cyclePrims = false;
990 osm = old;
991 } // else defer toggling to mouseRelease time in those cases:
992 /*
993 * osm == old -- the true nearest node is the
994 * selected one osm is a new node -- do not break
995 * unglue ways in ALT mode ctrl is pressed -- ctrl
996 * generally works on mouseReleased
997 */
998 }
999 }
1000 }
1001 }
1002 return osm;
1003 }
1004
1005 /**
1006 * Modifies current selection state and returns the next element in a
1007 * selection cycle given by
1008 * <code>cycleList</code> field
1009 * @return the next element of cycle list
1010 */
1011 private Collection<OsmPrimitive> cyclePrims() {
1012 OsmPrimitive nxt = null;
1013
1014 if (cycleList.size() <= 1) {
1015 // no real cycling, just return one-element collection with nearest primitive in it
1016 return cycleList;
1017 }
1018// updateKeyModifiers(e); // already called before !
1019
1020 DataSet ds = getCurrentDataSet();
1021 OsmPrimitive first = cycleList.iterator().next(), foundInDS = null;
1022 nxt = first;
1023
1024 if (cyclePrims && shift) {
1025 for (Iterator<OsmPrimitive> i = cycleList.iterator(); i.hasNext();) {
1026 nxt = i.next();
1027 if (!nxt.isSelected()) {
1028 break; // take first primitive in cycleList not in sel
1029 }
1030 }
1031 // if primitives 1,2,3 are under cursor, [Alt-press] [Shift-release] gives 1 -> 12 -> 123
1032 } else {
1033 for (Iterator<OsmPrimitive> i = cycleList.iterator(); i.hasNext();) {
1034 nxt = i.next();
1035 if (nxt.isSelected()) {
1036 foundInDS = nxt;
1037 // first selected primitive in cycleList is found
1038 if (cyclePrims || ctrl) {
1039 ds.clearSelection(foundInDS); // deselect it
1040 nxt = i.hasNext() ? i.next() : first;
1041 // return next one in cycle list (last->first)
1042 }
1043 break; // take next primitive in cycleList
1044 }
1045 }
1046 }
1047
1048 // if "no-alt-cycling" is enabled, Ctrl-Click arrives here.
1049 if (ctrl) {
1050 // a member of cycleList was found in the current dataset selection
1051 if (foundInDS != null) {
1052 // mouse was moved to a different selection group w/ a previous sel
1053 if (!cycleList.contains(cycleStart)) {
1054 ds.clearSelection(cycleList);
1055 cycleStart = foundInDS;
1056 } else if (cycleStart.equals(nxt)) {
1057 // loop detected, insert deselect step
1058 ds.addSelected(nxt);
1059 }
1060 } else {
1061 // setup for iterating a sel group again or a new, different one..
1062 nxt = (cycleList.contains(cycleStart)) ? cycleStart : first;
1063 cycleStart = nxt;
1064 }
1065 } else {
1066 cycleStart = null;
1067 }
1068 // return one-element collection with one element to be selected (or added to selection)
1069 return asColl(nxt);
1070 }
1071 }
1072
1073 private class VirtualManager {
1074
1075 private Node virtualNode = null;
1076 private Collection<WaySegment> virtualWays = new LinkedList<>();
1077 private int nodeVirtualSize;
1078 private int virtualSnapDistSq2;
1079 private int virtualSpace;
1080
1081 private void init() {
1082 nodeVirtualSize = Main.pref.getInteger("mappaint.node.virtual-size", 8);
1083 int virtualSnapDistSq = Main.pref.getInteger("mappaint.node.virtual-snap-distance", 8);
1084 virtualSnapDistSq2 = virtualSnapDistSq*virtualSnapDistSq;
1085 virtualSpace = Main.pref.getInteger("mappaint.node.virtual-space", 70);
1086 }
1087
1088 /**
1089 * Calculate a virtual node if there is enough visual space to draw a
1090 * crosshair node and the middle of a way segment is clicked. If the
1091 * user drags the crosshair node, it will be added to all ways in
1092 * <code>virtualWays</code>.
1093 *
1094 * @param p the point clicked
1095 * @return whether
1096 * <code>virtualNode</code> and
1097 * <code>virtualWays</code> were setup.
1098 */
1099 private boolean activateVirtualNodeNearPoint(Point p) {
1100 if (nodeVirtualSize > 0) {
1101
1102 Collection<WaySegment> selVirtualWays = new LinkedList<>();
1103 Pair<Node, Node> vnp = null, wnp = new Pair<>(null, null);
1104
1105 Way w = null;
1106 for (WaySegment ws : mv.getNearestWaySegments(p, OsmPrimitive.isSelectablePredicate)) {
1107 w = ws.way;
1108
1109 Point2D p1 = mv.getPoint2D(wnp.a = w.getNode(ws.lowerIndex));
1110 Point2D p2 = mv.getPoint2D(wnp.b = w.getNode(ws.lowerIndex + 1));
1111 if (WireframeMapRenderer.isLargeSegment(p1, p2, virtualSpace)) {
1112 Point2D pc = new Point2D.Double((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
1113 if (p.distanceSq(pc) < virtualSnapDistSq2) {
1114 // Check that only segments on top of each other get added to the
1115 // virtual ways list. Otherwise ways that coincidentally have their
1116 // virtual node at the same spot will be joined which is likely unwanted
1117 Pair.sort(wnp);
1118 if (vnp == null) {
1119 vnp = new Pair<>(wnp.a, wnp.b);
1120 virtualNode = new Node(mv.getLatLon(pc.getX(), pc.getY()));
1121 }
1122 if (vnp.equals(wnp)) {
1123 // if mutiple line segments have the same points,
1124 // add all segments to be splitted to virtualWays list
1125 // if some lines are selected, only their segments will go to virtualWays
1126 (w.isSelected() ? selVirtualWays : virtualWays).add(ws);
1127 }
1128 }
1129 }
1130 }
1131
1132 if (!selVirtualWays.isEmpty()) {
1133 virtualWays = selVirtualWays;
1134 }
1135 }
1136
1137 return !virtualWays.isEmpty();
1138 }
1139
1140 private void createMiddleNodeFromVirtual(EastNorth currentEN) {
1141 Collection<Command> virtualCmds = new LinkedList<>();
1142 virtualCmds.add(new AddCommand(virtualNode));
1143 for (WaySegment virtualWay : virtualWays) {
1144 Way w = virtualWay.way;
1145 Way wnew = new Way(w);
1146 wnew.addNode(virtualWay.lowerIndex + 1, virtualNode);
1147 virtualCmds.add(new ChangeCommand(w, wnew));
1148 }
1149 virtualCmds.add(new MoveCommand(virtualNode, startEN, currentEN));
1150 String text = trn("Add and move a virtual new node to way",
1151 "Add and move a virtual new node to {0} ways", virtualWays.size(),
1152 virtualWays.size());
1153 Main.main.undoRedo.add(new SequenceCommand(text, virtualCmds));
1154 getCurrentDataSet().setSelected(Collections.singleton((OsmPrimitive) virtualNode));
1155 clear();
1156 }
1157
1158 private void clear() {
1159 virtualWays.clear();
1160 virtualNode = null;
1161 }
1162
1163 private boolean hasVirtualNode() {
1164 return virtualNode != null;
1165 }
1166
1167 private boolean hasVirtualWaysToBeConstructed() {
1168 return !virtualWays.isEmpty();
1169 }
1170 }
1171
1172 /**
1173 * @return o as collection of o's type.
1174 */
1175 protected static <T> Collection<T> asColl(T o) {
1176 if (o == null)
1177 return Collections.emptySet();
1178 return Collections.singleton(o);
1179 }
1180}
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