source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/SelectAction.java@ 5443

Last change on this file since 5443 was 5443, checked in by akks, 12 years ago

see #7888: Ctrl-Drag moves the node/way under cursor; fix dragging after rotation; minor refactoring of SelectAction
  • Property svn:eol-style set to native
File size: 44.0 KB
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1// License: GPL. Copyright 2007 by Immanuel Scholz and others
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.AWTEvent;
9import java.awt.Cursor;
10import java.awt.Point;
11import java.awt.Rectangle;
12import java.awt.Toolkit;
13import java.awt.event.AWTEventListener;
14import java.awt.event.InputEvent;
15import java.awt.event.KeyEvent;
16import java.awt.event.MouseEvent;
17import java.awt.geom.Point2D;
18import java.util.Collection;
19import java.util.Collections;
20import java.util.HashSet;
21import java.util.Iterator;
22import java.util.LinkedList;
23import java.util.Set;
24
25import javax.swing.JOptionPane;
26
27import org.openstreetmap.josm.Main;
28import org.openstreetmap.josm.actions.MergeNodesAction;
29import org.openstreetmap.josm.command.AddCommand;
30import org.openstreetmap.josm.command.ChangeCommand;
31import org.openstreetmap.josm.command.Command;
32import org.openstreetmap.josm.command.MoveCommand;
33import org.openstreetmap.josm.command.RotateCommand;
34import org.openstreetmap.josm.command.ScaleCommand;
35import org.openstreetmap.josm.command.SequenceCommand;
36import org.openstreetmap.josm.data.coor.EastNorth;
37import org.openstreetmap.josm.data.osm.DataSet;
38import org.openstreetmap.josm.data.osm.Node;
39import org.openstreetmap.josm.data.osm.OsmPrimitive;
40import org.openstreetmap.josm.data.osm.Way;
41import org.openstreetmap.josm.data.osm.WaySegment;
42import org.openstreetmap.josm.data.osm.visitor.AllNodesVisitor;
43import org.openstreetmap.josm.data.osm.visitor.paint.WireframeMapRenderer;
44import org.openstreetmap.josm.gui.ExtendedDialog;
45import org.openstreetmap.josm.gui.MapFrame;
46import org.openstreetmap.josm.gui.MapView;
47import org.openstreetmap.josm.gui.SelectionManager;
48import org.openstreetmap.josm.gui.SelectionManager.SelectionEnded;
49import org.openstreetmap.josm.gui.layer.Layer;
50import org.openstreetmap.josm.gui.layer.OsmDataLayer;
51import org.openstreetmap.josm.tools.ImageProvider;
52import org.openstreetmap.josm.tools.Pair;
53import org.openstreetmap.josm.tools.PlatformHookOsx;
54import org.openstreetmap.josm.tools.Shortcut;
55
56/**
57 * Move is an action that can move all kind of OsmPrimitives (except keys for now).
58 *
59 * If an selected object is under the mouse when dragging, move all selected objects.
60 * If an unselected object is under the mouse when dragging, it becomes selected
61 * and will be moved.
62 * If no object is under the mouse, move all selected objects (if any)
63 *
64 * @author imi
65 */
66public class SelectAction extends MapMode implements AWTEventListener, SelectionEnded {
67 // "select" means the selection rectangle and "move" means either dragging
68 // or select if no mouse movement occurs (i.e. just clicking)
69 enum Mode { move, rotate, scale, select }
70
71 // contains all possible cases the cursor can be in the SelectAction
72 static private enum SelectActionCursor {
73 rect("normal", "selection"),
74 rect_add("normal", "select_add"),
75 rect_rm("normal", "select_remove"),
76 way("normal", "select_way"),
77 way_add("normal", "select_way_add"),
78 way_rm("normal", "select_way_remove"),
79 node("normal", "select_node"),
80 node_add("normal", "select_node_add"),
81 node_rm("normal", "select_node_remove"),
82 virtual_node("normal", "addnode"),
83 scale("scale", null),
84 rotate("rotate", null),
85 merge("crosshair", null),
86 lasso("normal", "rope"),
87 merge_to_node("crosshair", "joinnode"),
88 move(Cursor.MOVE_CURSOR);
89
90 private final Cursor c;
91 private SelectActionCursor(String main, String sub) {
92 c = ImageProvider.getCursor(main, sub);
93 }
94 private SelectActionCursor(int systemCursor) {
95 c = Cursor.getPredefinedCursor(systemCursor);
96 }
97 public Cursor cursor() {
98 return c;
99 }
100 }
101
102 private boolean lassoMode = false;
103
104 // Cache previous mouse event (needed when only the modifier keys are
105 // pressed but the mouse isn't moved)
106 private MouseEvent oldEvent = null;
107
108 private Mode mode = null;
109 private SelectionManager selectionManager;
110 private boolean cancelDrawMode = false;
111 private boolean drawTargetHighlight;
112 private boolean didMouseDrag = false;
113 /**
114 * The component this SelectAction is associated with.
115 */
116 private final MapView mv;
117 /**
118 * The old cursor before the user pressed the mouse button.
119 */
120 private Point startingDraggingPos;
121 /**
122 * point where user pressed the mouse to start movement
123 */
124 EastNorth startEN;
125 /**
126 * The last known position of the mouse.
127 */
128 private Point lastMousePos;
129 /**
130 * The time of the user mouse down event.
131 */
132 private long mouseDownTime = 0;
133 /**
134 * The pressed button of the user mouse down event.
135 */
136 private int mouseDownButton = 0;
137 /**
138 * The time of the user mouse down event.
139 */
140 private long mouseReleaseTime = 0;
141 /**
142 * The time which needs to pass between click and release before something
143 * counts as a move, in milliseconds
144 */
145 private int initialMoveDelay;
146 /**
147 * The screen distance which needs to be travelled before something
148 * counts as a move, in pixels
149 */
150 private int initialMoveThreshold;
151 private boolean initialMoveThresholdExceeded = false;
152
153 /**
154 * elements that have been highlighted in the previous iteration. Used
155 * to remove the highlight from them again as otherwise the whole data
156 * set would have to be checked.
157 */
158 private Set<OsmPrimitive> oldHighlights = new HashSet<OsmPrimitive>();
159
160 /**
161 * Create a new SelectAction
162 * @param mapFrame The MapFrame this action belongs to.
163 */
164 public SelectAction(MapFrame mapFrame) {
165 super(tr("Select"), "move/move", tr("Select, move, scale and rotate objects"),
166 Shortcut.registerShortcut("mapmode:select", tr("Mode: {0}", tr("Select")), KeyEvent.VK_S, Shortcut.DIRECT),
167 mapFrame,
168 ImageProvider.getCursor("normal", "selection"));
169 mv = mapFrame.mapView;
170 putValue("help", ht("/Action/Select"));
171 selectionManager = new SelectionManager(this, false, mv);
172 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
173 initialMoveThreshold = Main.pref.getInteger("edit.initial-move-threshold", 5);
174 }
175
176 @Override
177 public void enterMode() {
178 super.enterMode();
179 mv.addMouseListener(this);
180 mv.addMouseMotionListener(this);
181 mv.setVirtualNodesEnabled(Main.pref.getInteger("mappaint.node.virtual-size", 8) != 0);
182 drawTargetHighlight = Main.pref.getBoolean("draw.target-highlight", true);
183 cycleManager.init();
184 virtualManager.init();
185 // This is required to update the cursors when ctrl/shift/alt is pressed
186 try {
187 Toolkit.getDefaultToolkit().addAWTEventListener(this, AWTEvent.KEY_EVENT_MASK);
188 } catch (SecurityException ex) {}
189 }
190
191 @Override
192 public void exitMode() {
193 super.exitMode();
194 selectionManager.unregister(mv);
195 mv.removeMouseListener(this);
196 mv.removeMouseMotionListener(this);
197 mv.setVirtualNodesEnabled(false);
198 try {
199 Toolkit.getDefaultToolkit().removeAWTEventListener(this);
200 } catch (SecurityException ex) {}
201 removeHighlighting();
202 }
203
204 int previousModifiers;
205
206 /**
207 * This is called whenever the keyboard modifier status changes
208 */
209 public void eventDispatched(AWTEvent e) {
210 if(oldEvent == null)
211 return;
212 // We don't have a mouse event, so we pass the old mouse event but the
213 // new modifiers.
214 int modif = ((InputEvent) e).getModifiers();
215 if (previousModifiers == modif)
216 return;
217 previousModifiers = modif;
218 if(giveUserFeedback(oldEvent, ((InputEvent) e).getModifiers())) {
219 mv.repaint();
220 }
221 }
222
223 /**
224 * handles adding highlights and updating the cursor for the given mouse event.
225 * Please note that the highlighting for merging while moving is handled via mouseDragged.
226 * @param MouseEvent which should be used as base for the feedback
227 * @return true if repaint is required
228 */
229 private boolean giveUserFeedback(MouseEvent e) {
230 return giveUserFeedback(e, e.getModifiers());
231 }
232
233 /**
234 * handles adding highlights and updating the cursor for the given mouse event.
235 * Please note that the highlighting for merging while moving is handled via mouseDragged.
236 * @param MouseEvent which should be used as base for the feedback
237 * @param define custom keyboard modifiers if the ones from MouseEvent are outdated or similar
238 * @return true if repaint is required
239 */
240 private boolean giveUserFeedback(MouseEvent e, int modifiers) {
241 Collection<OsmPrimitive> c = MapView.asColl(
242 mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true));
243
244 updateKeyModifiers(modifiers);
245 determineMapMode(!c.isEmpty());
246
247 HashSet<OsmPrimitive> newHighlights = new HashSet<OsmPrimitive>();
248
249 virtualManager.clear();
250 if(mode == Mode.move) {
251 if (!dragInProgress() && virtualManager.activateVirtualNodeNearPoint(e.getPoint())) {
252 DataSet ds = getCurrentDataSet();
253 if (ds != null && drawTargetHighlight) {
254 ds.setHighlightedVirtualNodes(virtualManager.virtualWays);
255 }
256 mv.setNewCursor(SelectActionCursor.virtual_node.cursor(), this);
257 // don't highlight anything else if a virtual node will be
258 return repaintIfRequired(newHighlights);
259 }
260 }
261
262 mv.setNewCursor(getCursor(c), this);
263
264 // return early if there can't be any highlights
265 if(!drawTargetHighlight || mode != Mode.move || c.isEmpty())
266 return repaintIfRequired(newHighlights);
267
268 // CTRL toggles selection, but if while dragging CTRL means merge
269 final boolean isToggleMode = ctrl && !dragInProgress();
270 for(OsmPrimitive x : c) {
271 // only highlight primitives that will change the selection
272 // when clicked. I.e. don't highlight selected elements unless
273 // we are in toggle mode.
274 if(isToggleMode || !x.isSelected()) {
275 newHighlights.add(x);
276 }
277 }
278 return repaintIfRequired(newHighlights);
279 }
280
281 /**
282 * works out which cursor should be displayed for most of SelectAction's
283 * features. The only exception is the "move" cursor when actually dragging
284 * primitives.
285 * @param nearbyStuff primitives near the cursor
286 * @return the cursor that should be displayed
287 */
288 private Cursor getCursor(Collection<OsmPrimitive> nearbyStuff) {
289 String c = "rect";
290 switch(mode) {
291 case move:
292 if(virtualManager.hasVirtualNode()) {
293 c = "virtual_node";
294 break;
295 }
296 final Iterator<OsmPrimitive> it = nearbyStuff.iterator();
297 final OsmPrimitive osm = it.hasNext() ? it.next() : null;
298
299 if(dragInProgress()) {
300 // only consider merge if ctrl is pressed and there are nodes in
301 // the selection that could be merged
302 if(!ctrl || getCurrentDataSet().getSelectedNodes().isEmpty()) {
303 c = "move";
304 break;
305 }
306 // only show merge to node cursor if nearby node and that node is currently
307 // not being dragged
308 final boolean hasTarget = osm != null && osm instanceof Node && !osm.isSelected();
309 c = hasTarget ? "merge_to_node" : "merge";
310 break;
311 }
312
313 c = (osm instanceof Node) ? "node" : c;
314 c = (osm instanceof Way) ? "way" : c;
315 if(shift) {
316 c += "_add";
317 } else if(ctrl) {
318 c += osm == null || osm.isSelected() ? "_rm" : "_add";
319 }
320 break;
321 case rotate:
322 c = "rotate";
323 break;
324 case scale:
325 c = "scale";
326 break;
327 case select:
328 if (lassoMode) {
329 c = "lasso";
330 } else {
331 c = "rect" + (shift ? "_add" : (ctrl ? "_rm" : ""));
332 }
333 break;
334 }
335 return SelectActionCursor.valueOf(c).cursor();
336 }
337
338 /**
339 * Removes all existing highlights.
340 * @return true if a repaint is required
341 */
342 private boolean removeHighlighting() {
343 boolean needsRepaint = false;
344 DataSet ds = getCurrentDataSet();
345 if(ds != null && !ds.getHighlightedVirtualNodes().isEmpty()) {
346 needsRepaint = true;
347 ds.clearHighlightedVirtualNodes();
348 }
349 if(oldHighlights.isEmpty())
350 return needsRepaint;
351
352 for(OsmPrimitive prim : oldHighlights) {
353 prim.setHighlighted(false);
354 }
355 oldHighlights = new HashSet<OsmPrimitive>();
356 return true;
357 }
358
359 private boolean repaintIfRequired(HashSet<OsmPrimitive> newHighlights) {
360 if(!drawTargetHighlight)
361 return false;
362
363 boolean needsRepaint = false;
364 for(OsmPrimitive x : newHighlights) {
365 if(oldHighlights.contains(x)) {
366 continue;
367 }
368 needsRepaint = true;
369 x.setHighlighted(true);
370 }
371 oldHighlights.removeAll(newHighlights);
372 for(OsmPrimitive x : oldHighlights) {
373 x.setHighlighted(false);
374 needsRepaint = true;
375 }
376 oldHighlights = newHighlights;
377 return needsRepaint;
378 }
379
380 /**
381 * Look, whether any object is selected. If not, select the nearest node.
382 * If there are no nodes in the dataset, do nothing.
383 *
384 * If the user did not press the left mouse button, do nothing.
385 *
386 * Also remember the starting position of the movement and change the mouse
387 * cursor to movement.
388 */
389 @Override
390 public void mousePressed(MouseEvent e) {
391 mouseDownButton = e.getButton();
392 // return early
393 if (!mv.isActiveLayerVisible() || !(Boolean) this.getValue("active") || mouseDownButton != MouseEvent.BUTTON1)
394 return;
395
396 // left-button mouse click only is processed here
397
398 // request focus in order to enable the expected keyboard shortcuts
399 mv.requestFocus();
400
401 // update which modifiers are pressed (shift, alt, ctrl)
402 updateKeyModifiers(e);
403
404 // We don't want to change to draw tool if the user tries to (de)select
405 // stuff but accidentally clicks in an empty area when selection is empty
406 cancelDrawMode = (shift || ctrl);
407 didMouseDrag = false;
408 initialMoveThresholdExceeded = false;
409 mouseDownTime = System.currentTimeMillis();
410 lastMousePos = e.getPoint();
411 startEN = mv.getEastNorth(lastMousePos.x,lastMousePos.y);
412
413 // primitives under cursor are stored in c collection
414
415 OsmPrimitive nearestPrimitive = mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true);
416
417 determineMapMode(nearestPrimitive!=null);
418
419 switch(mode) {
420 case rotate:
421 case scale:
422 // if nothing was selected, select primitive under cursor for scaling or rotating
423 if (getCurrentDataSet().getSelected().isEmpty()) {
424 getCurrentDataSet().setSelected(MapView.asColl(nearestPrimitive));
425 }
426
427 // Mode.select redraws when selectPrims is called
428 // Mode.move redraws when mouseDragged is called
429 // Mode.rotate redraws here
430 // Mode.scale redraws here
431 break;
432 case move:
433 // also include case when some primitive is under cursor and no shift+ctrl / alt+ctrl is pressed
434 // so this is not movement, but selection on primitive under cursor
435 if (!cancelDrawMode && nearestPrimitive instanceof Way) {
436 virtualManager.activateVirtualNodeNearPoint(e.getPoint());
437 }
438 OsmPrimitive toSelect = cycleManager.cycleSetup(nearestPrimitive, e.getPoint());
439 selectPrims(mv.asColl(toSelect), false, false);
440 useLastMoveCommandIfPossible();
441 break;
442 case select:
443 default:
444 // start working with rectangle or lasso
445 selectionManager.register(mv, lassoMode);
446 selectionManager.mousePressed(e);
447 break;
448 }
449 giveUserFeedback(e);
450 mv.repaint();
451 updateStatusLine();
452 }
453
454 @Override
455 public void mouseMoved(MouseEvent e) {
456 // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
457 if ((Main.platform instanceof PlatformHookOsx) && (mode == Mode.rotate || mode == Mode.scale)) {
458 mouseDragged(e);
459 return;
460 }
461 oldEvent = e;
462 if(giveUserFeedback(e)) {
463 mv.repaint();
464 }
465 }
466
467 /**
468 * If the left mouse button is pressed, move all currently selected
469 * objects (if one of them is under the mouse) or the current one under the
470 * mouse (which will become selected).
471 */
472 @Override
473 public void mouseDragged(MouseEvent e) {
474 if (!mv.isActiveLayerVisible())
475 return;
476
477 // Swing sends random mouseDragged events when closing dialogs by double-clicking their top-left icon on Windows
478 // Ignore such false events to prevent issues like #7078
479 if (mouseDownButton == MouseEvent.BUTTON1 && mouseReleaseTime > mouseDownTime)
480 return;
481
482 cancelDrawMode = true;
483 if (mode == Mode.select)
484 return;
485
486 // do not count anything as a move if it lasts less than 100 milliseconds.
487 if ((mode == Mode.move) && (System.currentTimeMillis() - mouseDownTime < initialMoveDelay))
488 return;
489
490 if (mode != Mode.rotate && mode != Mode.scale) // button is pressed in rotate mode
491 {
492 if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == 0)
493 return;
494 }
495
496 if (mode == Mode.move) {
497 // If ctrl is pressed we are in merge mode. Look for a nearby node,
498 // highlight it and adjust the cursor accordingly.
499 final boolean canMerge = ctrl && !getCurrentDataSet().getSelectedNodes().isEmpty();
500 final OsmPrimitive p = canMerge ? (OsmPrimitive)findNodeToMergeTo(e.getPoint()) : null;
501 boolean needsRepaint = removeHighlighting();
502 if(p != null) {
503 p.setHighlighted(true);
504 oldHighlights.add(p);
505 needsRepaint = true;
506 }
507 mv.setNewCursor(getCursor(MapView.asColl(p)), this);
508 // also update the stored mouse event, so we can display the correct cursor
509 // when dragging a node onto another one and then press CTRL to merge
510 oldEvent = e;
511 if(needsRepaint) {
512 mv.repaint();
513 }
514 }
515
516 if (startingDraggingPos == null) {
517 startingDraggingPos = new Point(e.getX(), e.getY());
518 }
519
520 if( lastMousePos == null ) {
521 lastMousePos = e.getPoint();
522 return;
523 }
524
525 if (!initialMoveThresholdExceeded) {
526 int dp = (int) lastMousePos.distance(e.getX(), e.getY());
527 if (dp < initialMoveThreshold)
528 return; // ignore small drags
529 initialMoveThresholdExceeded = true; //no more ingnoring uintil nex mouse press
530 }
531 if (e.getPoint().equals(lastMousePos))
532 return;
533
534 EastNorth currentEN = mv.getEastNorth(e.getX(), e.getY());
535
536 if (virtualManager.hasVirtualWaysToBeConstructed()) {
537 virtualManager.createMiddleNodeFromVirtual(currentEN);
538 } else {
539 if (!updateCommandWhileDragging(currentEN)) return;
540 }
541
542 mv.repaint();
543 if (mode != Mode.scale) {
544 lastMousePos = e.getPoint();
545 }
546
547 didMouseDrag = true;
548 }
549
550
551
552 @Override
553 public void mouseExited(MouseEvent e) {
554 if(removeHighlighting()) {
555 mv.repaint();
556 }
557 }
558
559
560 @Override
561 public void mouseReleased(MouseEvent e) {
562 if (!mv.isActiveLayerVisible())
563 return;
564
565 startingDraggingPos = null;
566 mouseReleaseTime = System.currentTimeMillis();
567
568 if (mode == Mode.select) {
569 selectionManager.unregister(mv);
570
571 // Select Draw Tool if no selection has been made
572 if (getCurrentDataSet().getSelected().isEmpty() && !cancelDrawMode) {
573 Main.map.selectDrawTool(true);
574 return;
575 }
576 }
577
578 if (mode == Mode.move && e.getButton() == MouseEvent.BUTTON1) {
579 if (!didMouseDrag) {
580 // only built in move mode
581 virtualManager.clear();
582 // do nothing if the click was to short too be recognized as a drag,
583 // but the release position is farther than 10px away from the press position
584 if (lastMousePos == null || lastMousePos.distanceSq(e.getPoint()) < 100) {
585 updateKeyModifiers(e);
586 selectPrims(cycleManager.cyclePrims(), true, false);
587
588 // If the user double-clicked a node, change to draw mode
589 Collection<OsmPrimitive> c = getCurrentDataSet().getSelected();
590 if (e.getClickCount() >= 2 && c.size() == 1 && c.iterator().next() instanceof Node) {
591 // We need to do it like this as otherwise drawAction will see a double
592 // click and switch back to SelectMode
593 Main.worker.execute(new Runnable() {
594 public void run() {
595 Main.map.selectDrawTool(true);
596 }
597 });
598 return;
599 }
600 }
601 } else {
602 confirmOrUndoMovement(e);
603 }
604 }
605
606 mode = null;
607
608 // simply remove any highlights if the middle click popup is active because
609 // the highlights don't depend on the cursor position there. If something was
610 // selected beforehand this would put us into move mode as well, which breaks
611 // the cycling through primitives on top of each other (see #6739).
612 if(e.getButton() == MouseEvent.BUTTON2) {
613 removeHighlighting();
614 } else {
615 giveUserFeedback(e);
616 }
617 updateStatusLine();
618 }
619
620 @Override
621 public void selectionEnded(Rectangle r, MouseEvent e) {
622 updateKeyModifiers(e);
623 mv.repaint();
624 selectPrims(selectionManager.getSelectedObjects(alt), true, true);
625 }
626
627 /**
628 * sets the mapmode according to key modifiers and if there are any
629 * selectables nearby. Everything has to be pre-determined for this
630 * function; its main purpose is to centralize what the modifiers do.
631 * @param hasSelectionNearby
632 */
633 private void determineMapMode(boolean hasSelectionNearby) {
634 if (shift && ctrl) {
635 mode = Mode.rotate;
636 } else if (alt && ctrl) {
637 mode = Mode.scale;
638 } else if (hasSelectionNearby || dragInProgress()) {
639 mode = Mode.move;
640 } else {
641 mode = Mode.select;
642 }
643 }
644
645 /** returns true whenever elements have been grabbed and moved (i.e. the initial
646 * thresholds have been exceeded) and is still in progress (i.e. mouse button
647 * still pressed)
648 */
649 final private boolean dragInProgress() {
650 return didMouseDrag && startingDraggingPos != null;
651 }
652
653
654 /**
655 * Create or update data modification command while dragging mouse - implementation of
656 * continuous moving, scaling and rotation
657 * @param currentEN - mouse position
658 * @return status of action (<code>true</code> when action was performed)
659 */
660 private boolean updateCommandWhileDragging(EastNorth currentEN) {
661 // Currently we support only transformations which do not affect relations.
662 // So don't add them in the first place to make handling easier
663 Collection<OsmPrimitive> selection = getCurrentDataSet().getSelectedNodesAndWays();
664 if (selection.isEmpty()) { // if nothing was selected to drag, just select nearest node/way to the cursor
665 OsmPrimitive nearestPrimitive = mv.getNearestNodeOrWay(mv.getPoint(startEN), OsmPrimitive.isSelectablePredicate, true);
666 getCurrentDataSet().setSelected(nearestPrimitive);
667 }
668
669 Collection<Node> affectedNodes = AllNodesVisitor.getAllNodes(selection);
670 // for these transformations, having only one node makes no sense - quit silently
671 if (affectedNodes.size() < 2 && (mode == Mode.rotate || mode == Mode.scale)) {
672 return false;
673 }
674 Command c = getLastCommand();
675 if (mode == Mode.move) {
676 getCurrentDataSet().beginUpdate();
677 if (c instanceof MoveCommand && affectedNodes.equals(((MoveCommand) c).getParticipatingPrimitives())) {
678 ((MoveCommand) c).saveCheckpoint();
679 ((MoveCommand) c).applyVectorTo(currentEN);
680 } else {
681 Main.main.undoRedo.add(
682 c = new MoveCommand(selection, startEN, currentEN));
683 }
684 for (Node n : affectedNodes) {
685 if (n.getCoor().isOutSideWorld()) {
686 // Revert move
687 ((MoveCommand) c).resetToCheckpoint();
688 JOptionPane.showMessageDialog(
689 Main.parent,
690 tr("Cannot move objects outside of the world."),
691 tr("Warning"),
692 JOptionPane.WARNING_MESSAGE);
693 mv.setNewCursor(cursor, this);
694 return false;
695 }
696 }
697 getCurrentDataSet().endUpdate();
698 return true;
699 }
700
701 startEN = currentEN; // drag can continue after scaling/rotation
702
703 if (mode == Mode.rotate) {
704 getCurrentDataSet().beginUpdate();
705 if (c instanceof RotateCommand && affectedNodes.equals(((RotateCommand) c).getTransformedNodes())) {
706 ((RotateCommand) c).handleEvent(currentEN);
707 } else {
708 Main.main.undoRedo.add(new RotateCommand(selection, currentEN));
709 }
710 getCurrentDataSet().endUpdate();
711 } else if (mode == Mode.scale) {
712 getCurrentDataSet().beginUpdate();
713 if (c instanceof ScaleCommand && affectedNodes.equals(((ScaleCommand) c).getTransformedNodes())) {
714 ((ScaleCommand) c).handleEvent(currentEN);
715 } else {
716 Main.main.undoRedo.add(new ScaleCommand(selection, currentEN));
717 }
718 getCurrentDataSet().endUpdate();
719 }
720 return true;
721 }
722
723 /**
724 * Adapt last move command (if it is suitable) to work with next drag, started at point startEN
725 */
726 private void useLastMoveCommandIfPossible() {
727 Command c = getLastCommand();
728 Collection<Node> affectedNodes = AllNodesVisitor.getAllNodes(getCurrentDataSet().getSelected());
729 if (c instanceof MoveCommand && affectedNodes.equals(((MoveCommand) c).getParticipatingPrimitives())) {
730 // old command was created with different base point of movement, we need to recalculate it
731 ((MoveCommand) c).changeStartPoint(startEN);
732 }
733 }
734
735 /**
736 * Obtain command in undoRedo stack to "continue" when dragging
737 */
738 private Command getLastCommand() {
739 Command c = !Main.main.undoRedo.commands.isEmpty()
740 ? Main.main.undoRedo.commands.getLast() : null;
741 if (c instanceof SequenceCommand) {
742 c = ((SequenceCommand) c).getLastCommand();
743 }
744 return c;
745 }
746
747 /**
748 * Present warning in case of large and possibly unwanted movements and undo
749 * unwanted movements.
750 *
751 * @param e the mouse event causing the action (mouse released)
752 */
753 private void confirmOrUndoMovement(MouseEvent e) {
754 int max = Main.pref.getInteger("warn.move.maxelements", 20), limit = max;
755 for (OsmPrimitive osm : getCurrentDataSet().getSelected()) {
756 if (osm instanceof Way) {
757 limit -= ((Way) osm).getNodes().size();
758 }
759 if ((limit -= 1) < 0) {
760 break;
761 }
762 }
763 if (limit < 0) {
764 ExtendedDialog ed = new ExtendedDialog(
765 Main.parent,
766 tr("Move elements"),
767 new String[]{tr("Move them"), tr("Undo move")});
768 ed.setButtonIcons(new String[]{"reorder.png", "cancel.png"});
769 ed.setContent(tr("You moved more than {0} elements. " + "Moving a large number of elements is often an error.\n" + "Really move them?", max));
770 ed.setCancelButton(2);
771 ed.toggleEnable("movedManyElements");
772 ed.showDialog();
773
774 if (ed.getValue() != 1) {
775 Main.main.undoRedo.undo();
776 }
777 } else {
778 // if small number of elements were moved,
779 updateKeyModifiers(e);
780 if (ctrl) mergePrims(e.getPoint());
781 }
782 getCurrentDataSet().fireSelectionChanged();
783 }
784
785 /**
786 * Merges the selected nodes to the one closest to the given mouse position iff the control
787 * key is pressed. If there is no such node, no action will be done and no error will be
788 * reported. If there is, it will execute the merge and add it to the undo buffer.
789 */
790 final private void mergePrims(Point p) {
791 Collection<Node> selNodes = getCurrentDataSet().getSelectedNodes();
792 if (selNodes.isEmpty())
793 return;
794
795 Node target = findNodeToMergeTo(p);
796 if (target == null)
797 return;
798
799 Collection<Node> nodesToMerge = new LinkedList<Node>(selNodes);
800 nodesToMerge.add(target);
801 MergeNodesAction.doMergeNodes(Main.main.getEditLayer(), nodesToMerge, target);
802 }
803
804 /**
805 * Tries to find a node to merge to when in move-merge mode for the current mouse
806 * position. Either returns the node or null, if no suitable one is nearby.
807 */
808 final private Node findNodeToMergeTo(Point p) {
809 Collection<Node> target = mv.getNearestNodes(p,
810 getCurrentDataSet().getSelectedNodes(),
811 OsmPrimitive.isSelectablePredicate);
812 return target.isEmpty() ? null : target.iterator().next();
813 }
814
815 private void selectPrims(Collection<OsmPrimitive> prims, boolean released, boolean area) {
816 DataSet ds = getCurrentDataSet();
817
818 // not allowed together: do not change dataset selection, return early
819 // Virtual Ways: if non-empty the cursor is above a virtual node. So don't highlight
820 // anything if about to drag the virtual node (i.e. !released) but continue if the
821 // cursor is only released above a virtual node by accident (i.e. released). See #7018
822 if ((shift && ctrl) || (ctrl && !released) || (virtualManager.hasVirtualWaysToBeConstructed() && !released))
823 return;
824
825 if (!released) {
826 // Don't replace the selection if the user clicked on a
827 // selected object (it breaks moving of selected groups).
828 // Do it later, on mouse release.
829 shift |= getCurrentDataSet().getSelected().containsAll(prims);
830 }
831
832 if (ctrl) {
833 // Ctrl on an item toggles its selection status,
834 // but Ctrl on an *area* just clears those items
835 // out of the selection.
836 if (area) {
837 ds.clearSelection(prims);
838 } else {
839 ds.toggleSelected(prims);
840 }
841 } else if (shift) {
842 // add prims to an existing selection
843 ds.addSelected(prims);
844 } else {
845 // clear selection, then select the prims clicked
846 ds.setSelected(prims);
847 }
848 }
849
850 @Override
851 public String getModeHelpText() {
852 if (mode == Mode.select)
853 return tr("Release the mouse button to select the objects in the rectangle.");
854 else if (mode == Mode.move) {
855 final boolean canMerge = getCurrentDataSet()!=null && !getCurrentDataSet().getSelectedNodes().isEmpty();
856 final String mergeHelp = canMerge ? (" " + tr("Ctrl to merge with nearest node.")) : "";
857 return tr("Release the mouse button to stop moving.") + mergeHelp;
858 } else if (mode == Mode.rotate)
859 return tr("Release the mouse button to stop rotating.");
860 else if (mode == Mode.scale)
861 return tr("Release the mouse button to stop scaling.");
862 else
863 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");
864 }
865
866 @Override
867 public boolean layerIsSupported(Layer l) {
868 return l instanceof OsmDataLayer;
869 }
870
871 public void setLassoMode(boolean lassoMode) {
872 this.selectionManager.setLassoMode(lassoMode);
873 this.lassoMode = lassoMode;
874 }
875
876 CycleManager cycleManager = new CycleManager();
877 VirtualManager virtualManager = new VirtualManager();
878
879 private class CycleManager {
880
881 private Collection<OsmPrimitive> cycleList = Collections.emptyList();
882 private boolean cyclePrims = false;
883 private OsmPrimitive cycleStart = null;
884 private boolean waitForMouseUpParameter;
885 private boolean multipleMatchesParameter;
886 /**
887 * read preferences
888 */
889 private void init() {
890 waitForMouseUpParameter = Main.pref.getBoolean("mappaint.select.waits-for-mouse-up", false);
891 multipleMatchesParameter = Main.pref.getBoolean("selectaction.cycles.multiple.matches", false);
892 }
893
894 /**
895 * Determine prmitive to be selected and build cycleList
896 * @param nearest primitive found by simple method
897 * @param p point where user clicked
898 * @return OsmPrimitive to be selected
899 */
900 private OsmPrimitive cycleSetup(OsmPrimitive nearest, Point p) {
901 OsmPrimitive osm = null;
902
903 if (nearest != null) {
904 osm = nearest;
905
906 // Point p = e.getPoint();
907// updateKeyModifiers(e); // cycleSetup called only after updateModifiers !
908
909 if (!(alt || multipleMatchesParameter)) {
910 // no real cycling, just one element in cycle list
911 cycleList = MapView.asColl(osm);
912
913 if (waitForMouseUpParameter) {
914 // prefer a selected nearest node or way, if possible
915 osm = mv.getNearestNodeOrWay(p, OsmPrimitive.isSelectablePredicate, true);
916 }
917 } else {
918 // Alt + left mouse button pressed: we need to build cycle list
919 cycleList = mv.getAllNearest(p, OsmPrimitive.isSelectablePredicate);
920
921 if (cycleList.size() > 1) {
922 cyclePrims = false;
923
924 // find first already selected element in cycle list
925 OsmPrimitive old = osm;
926 for (OsmPrimitive o : cycleList) {
927 if (o.isSelected()) {
928 cyclePrims = true;
929 osm = o;
930 break;
931 }
932 }
933
934 // special case: for cycle groups of 2, we can toggle to the
935 // true nearest primitive on mousePressed right away
936 if (cycleList.size() == 2 && !waitForMouseUpParameter) {
937 if (!(osm.equals(old) || osm.isNew() || ctrl)) {
938 cyclePrims = false;
939 osm = old;
940 } // else defer toggling to mouseRelease time in those cases:
941 /*
942 * osm == old -- the true nearest node is the
943 * selected one osm is a new node -- do not break
944 * unglue ways in ALT mode ctrl is pressed -- ctrl
945 * generally works on mouseReleased
946 */
947 }
948 }
949 }
950 }
951 return osm;
952 }
953
954 /**
955 * Modifies current selection state and returns the next element in a
956 * selection cycle given by
957 * <code>cycleList</code> field
958 * @return the next element of cycle list
959 */
960 private Collection<OsmPrimitive> cyclePrims() {
961 OsmPrimitive nxt = null;
962
963 if (cycleList.size() <= 1) {
964 // no real cycling, just return one-element collection with nearest primitive in it
965 return cycleList;
966 }
967// updateKeyModifiers(e); // already called before !
968
969 DataSet ds = getCurrentDataSet();
970 OsmPrimitive first = cycleList.iterator().next(), foundInDS = null;
971 nxt = first;
972
973 if (cyclePrims && shift) {
974 for (Iterator<OsmPrimitive> i = cycleList.iterator(); i.hasNext();) {
975 nxt = i.next();
976 if (!nxt.isSelected()) {
977 break; // take first primitive in cycleList not in sel
978 }
979 }
980 // if primitives 1,2,3 are under cursor, [Alt-press] [Shift-release] gives 1 -> 12 -> 123
981 } else {
982 for (Iterator<OsmPrimitive> i = cycleList.iterator(); i.hasNext();) {
983 nxt = i.next();
984 if (nxt.isSelected()) {
985 foundInDS = nxt;
986 // first selected primitive in cycleList is found
987 if (cyclePrims || ctrl) {
988 ds.clearSelection(foundInDS); // deselect it
989 nxt = i.hasNext() ? i.next() : first;
990 // return next one in cycle list (last->first)
991 }
992 break; // take next primitive in cycleList
993 }
994 }
995 }
996
997 // if "no-alt-cycling" is enabled, Ctrl-Click arrives here.
998 if (ctrl) {
999 // a member of cycleList was found in the current dataset selection
1000 if (foundInDS != null) {
1001 // mouse was moved to a different selection group w/ a previous sel
1002 if (!cycleList.contains(cycleStart)) {
1003 ds.clearSelection(cycleList);
1004 cycleStart = foundInDS;
1005 } else if (cycleStart.equals(nxt)) {
1006 // loop detected, insert deselect step
1007 ds.addSelected(nxt);
1008 }
1009 } else {
1010 // setup for iterating a sel group again or a new, different one..
1011 nxt = (cycleList.contains(cycleStart)) ? cycleStart : first;
1012 cycleStart = nxt;
1013 }
1014 } else {
1015 cycleStart = null;
1016 }
1017 // return one-element collection with one element to be selected (or added to selection)
1018 return MapView.asColl(nxt);
1019 }
1020 }
1021
1022 private class VirtualManager {
1023
1024 private Node virtualNode = null;
1025 private Collection<WaySegment> virtualWays = new LinkedList<WaySegment>();
1026 private int nodeVirtualSize;
1027 private int virtualSnapDistSq2;
1028 private int virtualSpace;
1029
1030 private void init() {
1031 nodeVirtualSize = Main.pref.getInteger("mappaint.node.virtual-size", 8);
1032 int virtualSnapDistSq = Main.pref.getInteger("mappaint.node.virtual-snap-distance", 8);
1033 virtualSnapDistSq2 = virtualSnapDistSq*virtualSnapDistSq;
1034 virtualSpace = Main.pref.getInteger("mappaint.node.virtual-space", 70);
1035 }
1036
1037 /**
1038 * Calculate a virtual node if there is enough visual space to draw a
1039 * crosshair node and the middle of a way segment is clicked. If the
1040 * user drags the crosshair node, it will be added to all ways in
1041 * <code>virtualWays</code>.
1042 *
1043 * @param e contains the point clicked
1044 * @return whether
1045 * <code>virtualNode</code> and
1046 * <code>virtualWays</code> were setup.
1047 */
1048 private boolean activateVirtualNodeNearPoint(Point p) {
1049 if (nodeVirtualSize > 0) {
1050
1051 Collection<WaySegment> selVirtualWays = new LinkedList<WaySegment>();
1052 Pair<Node, Node> vnp = null, wnp = new Pair<Node, Node>(null, null);
1053
1054 Way w = null;
1055 for (WaySegment ws : mv.getNearestWaySegments(p, OsmPrimitive.isSelectablePredicate)) {
1056 w = ws.way;
1057
1058 Point2D p1 = mv.getPoint2D(wnp.a = w.getNode(ws.lowerIndex));
1059 Point2D p2 = mv.getPoint2D(wnp.b = w.getNode(ws.lowerIndex + 1));
1060 if (WireframeMapRenderer.isLargeSegment(p1, p2, virtualSpace)) {
1061 Point2D pc = new Point2D.Double((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
1062 if (p.distanceSq(pc) < virtualSnapDistSq2) {
1063 // Check that only segments on top of each other get added to the
1064 // virtual ways list. Otherwise ways that coincidentally have their
1065 // virtual node at the same spot will be joined which is likely unwanted
1066 Pair.sort(wnp);
1067 if (vnp == null) {
1068 vnp = new Pair<Node, Node>(wnp.a, wnp.b);
1069 virtualNode = new Node(mv.getLatLon(pc.getX(), pc.getY()));
1070 }
1071 if (vnp.equals(wnp)) {
1072 // if mutiple line segments have the same points,
1073 // add all segments to be splitted to virtualWays list
1074 // if some lines are selected, only their segments will go to virtualWays
1075 (w.isSelected() ? selVirtualWays : virtualWays).add(ws);
1076 }
1077 }
1078 }
1079 }
1080
1081 if (!selVirtualWays.isEmpty()) {
1082 virtualWays = selVirtualWays;
1083 }
1084 }
1085
1086 return !virtualWays.isEmpty();
1087 }
1088
1089 private void createMiddleNodeFromVirtual(EastNorth currentEN) {
1090 Collection<Command> virtualCmds = new LinkedList<Command>();
1091 virtualCmds.add(new AddCommand(virtualNode));
1092 for (WaySegment virtualWay : virtualWays) {
1093 Way w = virtualWay.way;
1094 Way wnew = new Way(w);
1095 wnew.addNode(virtualWay.lowerIndex + 1, virtualNode);
1096 virtualCmds.add(new ChangeCommand(w, wnew));
1097 }
1098 virtualCmds.add(new MoveCommand(virtualNode, startEN, currentEN));
1099 String text = trn("Add and move a virtual new node to way",
1100 "Add and move a virtual new node to {0} ways", virtualWays.size(),
1101 virtualWays.size());
1102 Main.main.undoRedo.add(new SequenceCommand(text, virtualCmds));
1103 getCurrentDataSet().setSelected(Collections.singleton((OsmPrimitive) virtualNode));
1104 clear();
1105 }
1106
1107 private void clear() {
1108 virtualWays.clear();
1109 virtualNode = null;
1110 }
1111
1112 private boolean hasVirtualNode() {
1113 return virtualNode != null;
1114 }
1115
1116 private boolean hasVirtualWaysToBeConstructed() {
1117 return !virtualWays.isEmpty();
1118 }
1119 }
1120}
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