Ticket #7888: SelectAction.java

File SelectAction.java, 40.8 KB (added by akks, 14 years ago)
Line 
1// License: GPL. Copyright 2007 by Immanuel Scholz and others
2package org.openstreetmap.josm.actions.mapmode;
3
4import java.awt.*;
5import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
6import static org.openstreetmap.josm.tools.I18n.tr;
7import static org.openstreetmap.josm.tools.I18n.trn;
8
9import java.awt.event.AWTEventListener;
10import java.awt.event.InputEvent;
11import java.awt.event.KeyEvent;
12import java.awt.event.MouseEvent;
13import java.awt.geom.Point2D;
14import java.util.Collection;
15import java.util.Collections;
16import java.util.HashSet;
17import java.util.Iterator;
18import java.util.LinkedList;
19import java.util.Set;
20
21import javax.swing.JOptionPane;
22
23import org.openstreetmap.josm.Main;
24import org.openstreetmap.josm.actions.MergeNodesAction;
25import org.openstreetmap.josm.command.AddCommand;
26import org.openstreetmap.josm.command.ChangeCommand;
27import org.openstreetmap.josm.command.Command;
28import org.openstreetmap.josm.command.MoveCommand;
29import org.openstreetmap.josm.command.RotateCommand;
30import org.openstreetmap.josm.command.ScaleCommand;
31import org.openstreetmap.josm.command.SequenceCommand;
32import org.openstreetmap.josm.data.coor.EastNorth;
33import org.openstreetmap.josm.data.osm.DataSet;
34import org.openstreetmap.josm.data.osm.Node;
35import org.openstreetmap.josm.data.osm.OsmPrimitive;
36import org.openstreetmap.josm.data.osm.Way;
37import org.openstreetmap.josm.data.osm.WaySegment;
38import org.openstreetmap.josm.data.osm.visitor.AllNodesVisitor;
39import org.openstreetmap.josm.data.osm.visitor.paint.WireframeMapRenderer;
40import org.openstreetmap.josm.gui.ExtendedDialog;
41import org.openstreetmap.josm.gui.MapFrame;
42import org.openstreetmap.josm.gui.MapView;
43import org.openstreetmap.josm.gui.SelectionManager;
44import org.openstreetmap.josm.gui.SelectionManager.SelectionEnded;
45import org.openstreetmap.josm.gui.layer.Layer;
46import org.openstreetmap.josm.gui.layer.OsmDataLayer;
47import org.openstreetmap.josm.tools.ImageProvider;
48import org.openstreetmap.josm.tools.Pair;
49import org.openstreetmap.josm.tools.PlatformHookOsx;
50import org.openstreetmap.josm.tools.Shortcut;
51
52/**
53 * Move is an action that can move all kind of OsmPrimitives (except keys for now).
54 *
55 * If an selected object is under the mouse when dragging, move all selected objects.
56 * If an unselected object is under the mouse when dragging, it becomes selected
57 * and will be moved.
58 * If no object is under the mouse, move all selected objects (if any)
59 *
60 * @author imi
61 */
62public class SelectAction extends MapMode implements AWTEventListener, SelectionEnded {
63 // "select" means the selection rectangle and "move" means either dragging
64 // or select if no mouse movement occurs (i.e. just clicking)
65 enum Mode { move, rotate, scale, select }
66
67 // contains all possible cases the cursor can be in the SelectAction
68 static private enum SelectActionCursor {
69 rect("normal", "selection"),
70 rect_add("normal", "select_add"),
71 rect_rm("normal", "select_remove"),
72 way("normal", "select_way"),
73 way_add("normal", "select_way_add"),
74 way_rm("normal", "select_way_remove"),
75 node("normal", "select_node"),
76 node_add("normal", "select_node_add"),
77 node_rm("normal", "select_node_remove"),
78 virtual_node("normal", "addnode"),
79 scale("scale", null),
80 rotate("rotate", null),
81 merge("crosshair", null),
82 lasso("normal", "rope"),
83 merge_to_node("crosshair", "joinnode"),
84 move(Cursor.MOVE_CURSOR);
85
86 private final Cursor c;
87 private SelectActionCursor(String main, String sub) {
88 c = ImageProvider.getCursor(main, sub);
89 }
90 private SelectActionCursor(int systemCursor) {
91 c = Cursor.getPredefinedCursor(systemCursor);
92 }
93 public Cursor cursor() {
94 return c;
95 }
96 }
97
98 private boolean lassoMode = false;
99
100 // Cache previous mouse event (needed when only the modifier keys are
101 // pressed but the mouse isn't moved)
102 private MouseEvent oldEvent = null;
103
104 private Mode mode = null;
105 private SelectionManager selectionManager;
106 private boolean cancelDrawMode = false;
107 private boolean drawTargetHighlight;
108 private boolean didMouseDrag = false;
109 /**
110 * The component this SelectAction is associated with.
111 */
112 private final MapView mv;
113 /**
114 * The old cursor before the user pressed the mouse button.
115 */
116 private Point startingDraggingPos;
117 /**
118 * The last known position of the mouse.
119 */
120 private Point lastMousePos;
121 /**
122 * The time of the user mouse down event.
123 */
124 private long mouseDownTime = 0;
125 /**
126 * The pressed button of the user mouse down event.
127 */
128 private int mouseDownButton = 0;
129 /**
130 * The time of the user mouse down event.
131 */
132 private long mouseReleaseTime = 0;
133 /**
134 * The time which needs to pass between click and release before something
135 * counts as a move, in milliseconds
136 */
137 private int initialMoveDelay;
138 /**
139 * The screen distance which needs to be travelled before something
140 * counts as a move, in pixels
141 */
142 private int initialMoveThreshold;
143 private boolean initialMoveThresholdExceeded = false;
144
145 /**
146 * elements that have been highlighted in the previous iteration. Used
147 * to remove the highlight from them again as otherwise the whole data
148 * set would have to be checked.
149 */
150 private Set<OsmPrimitive> oldHighlights = new HashSet<OsmPrimitive>();
151
152 /**
153 * Create a new SelectAction
154 * @param mapFrame The MapFrame this action belongs to.
155 */
156 public SelectAction(MapFrame mapFrame) {
157 super(tr("Select"), "move/move", tr("Select, move, scale and rotate objects"),
158 Shortcut.registerShortcut("mapmode:select", tr("Mode: {0}", tr("Select")), KeyEvent.VK_S, Shortcut.DIRECT),
159 mapFrame,
160 ImageProvider.getCursor("normal", "selection"));
161 mv = mapFrame.mapView;
162 putValue("help", ht("/Action/Select"));
163 selectionManager = new SelectionManager(this, false, mv);
164 initialMoveDelay = Main.pref.getInteger("edit.initial-move-delay", 200);
165 initialMoveThreshold = Main.pref.getInteger("edit.initial-move-threshold", 5);
166 }
167
168 @Override
169 public void enterMode() {
170 super.enterMode();
171 mv.addMouseListener(this);
172 mv.addMouseMotionListener(this);
173 mv.setVirtualNodesEnabled(Main.pref.getInteger("mappaint.node.virtual-size", 8) != 0);
174 drawTargetHighlight = Main.pref.getBoolean("draw.target-highlight", true);
175 // This is required to update the cursors when ctrl/shift/alt is pressed
176 try {
177 Toolkit.getDefaultToolkit().addAWTEventListener(this, AWTEvent.KEY_EVENT_MASK);
178 } catch (SecurityException ex) {}
179 }
180
181 @Override
182 public void exitMode() {
183 super.exitMode();
184 selectionManager.unregister(mv);
185 mv.removeMouseListener(this);
186 mv.removeMouseMotionListener(this);
187 mv.setVirtualNodesEnabled(false);
188 try {
189 Toolkit.getDefaultToolkit().removeAWTEventListener(this);
190 } catch (SecurityException ex) {}
191 removeHighlighting();
192 }
193
194 /**
195 * works out which cursor should be displayed for most of SelectAction's
196 * features. The only exception is the "move" cursor when actually dragging
197 * primitives.
198 * @param nearbyStuff primitives near the cursor
199 * @return the cursor that should be displayed
200 */
201 private Cursor getCursor(Collection<OsmPrimitive> nearbyStuff) {
202 String c = "rect";
203 switch(mode) {
204 case move:
205 if(virtualManager.hasVirtualNode()) {
206 c = "virtual_node";
207 break;
208 }
209 final Iterator<OsmPrimitive> it = nearbyStuff.iterator();
210 final OsmPrimitive osm = it.hasNext() ? it.next() : null;
211
212 if(dragInProgress()) {
213 // only consider merge if ctrl is pressed and there are nodes in
214 // the selection that could be merged
215 if(!ctrl || getCurrentDataSet().getSelectedNodes().isEmpty()) {
216 c = "move";
217 break;
218 }
219 // only show merge to node cursor if nearby node and that node is currently
220 // not being dragged
221 final boolean hasTarget = osm != null && osm instanceof Node && !osm.isSelected();
222 c = hasTarget ? "merge_to_node" : "merge";
223 break;
224 }
225
226 c = (osm instanceof Node) ? "node" : c;
227 c = (osm instanceof Way) ? "way" : c;
228 if(shift) {
229 c += "_add";
230 } else if(ctrl) {
231 c += osm == null || osm.isSelected() ? "_rm" : "_add";
232 }
233 break;
234 case rotate:
235 c = "rotate";
236 break;
237 case scale:
238 c = "scale";
239 break;
240 case select:
241 if (lassoMode) {
242 c = "lasso";
243 } else {
244 c = "rect" + (shift ? "_add" : (ctrl ? "_rm" : ""));
245 }
246 break;
247 }
248 return SelectActionCursor.valueOf(c).cursor();
249 }
250
251 /**
252 * Removes all existing highlights.
253 * @return true if a repaint is required
254 */
255 private boolean removeHighlighting() {
256 boolean needsRepaint = false;
257 DataSet ds = getCurrentDataSet();
258 if(ds != null && !ds.getHighlightedVirtualNodes().isEmpty()) {
259 needsRepaint = true;
260 ds.clearHighlightedVirtualNodes();
261 }
262 if(oldHighlights.isEmpty())
263 return needsRepaint;
264
265 for(OsmPrimitive prim : oldHighlights) {
266 prim.setHighlighted(false);
267 }
268 oldHighlights = new HashSet<OsmPrimitive>();
269 return true;
270 }
271
272 private boolean repaintIfRequired(HashSet<OsmPrimitive> newHighlights) {
273 if(!drawTargetHighlight)
274 return false;
275
276 boolean needsRepaint = false;
277 for(OsmPrimitive x : newHighlights) {
278 if(oldHighlights.contains(x)) {
279 continue;
280 }
281 needsRepaint = true;
282 x.setHighlighted(true);
283 }
284 oldHighlights.removeAll(newHighlights);
285 for(OsmPrimitive x : oldHighlights) {
286 x.setHighlighted(false);
287 needsRepaint = true;
288 }
289 oldHighlights = newHighlights;
290 return needsRepaint;
291 }
292
293 /**
294 * handles adding highlights and updating the cursor for the given mouse event.
295 * Please note that the highlighting for merging while moving is handled via mouseDragged.
296 * @param MouseEvent which should be used as base for the feedback
297 * @return true if repaint is required
298 */
299 private boolean giveUserFeedback(MouseEvent e) {
300 return giveUserFeedback(e, e.getModifiers());
301 }
302
303 /**
304 * handles adding highlights and updating the cursor for the given mouse event.
305 * Please note that the highlighting for merging while moving is handled via mouseDragged.
306 * @param MouseEvent which should be used as base for the feedback
307 * @param define custom keyboard modifiers if the ones from MouseEvent are outdated or similar
308 * @return true if repaint is required
309 */
310 private boolean giveUserFeedback(MouseEvent e, int modifiers) {
311 Collection<OsmPrimitive> c = MapView.asColl(
312 mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true));
313
314 updateKeyModifiers(modifiers);
315 determineMapMode(!c.isEmpty());
316
317 HashSet<OsmPrimitive> newHighlights = new HashSet<OsmPrimitive>();
318
319 virtualManager.clear();
320 if(mode == Mode.move && virtualManager.setupVirtual(e.getPoint())) {
321 DataSet ds = getCurrentDataSet();
322 if (ds != null && drawTargetHighlight) {
323 ds.setHighlightedVirtualNodes(virtualManager.virtualWays);
324 }
325 mv.setNewCursor(SelectActionCursor.virtual_node.cursor(), this);
326 // don't highlight anything else if a virtual node will be
327 return repaintIfRequired(newHighlights);
328 }
329
330 mv.setNewCursor(getCursor(c), this);
331
332 // return early if there can't be any highlights
333 if(!drawTargetHighlight || mode != Mode.move || c.isEmpty())
334 return repaintIfRequired(newHighlights);
335
336 // CTRL toggles selection, but if while dragging CTRL means merge
337 final boolean isToggleMode = ctrl && !dragInProgress();
338 for(OsmPrimitive x : c) {
339 // only highlight primitives that will change the selection
340 // when clicked. I.e. don't highlight selected elements unless
341 // we are in toggle mode.
342 if(isToggleMode || !x.isSelected()) {
343 newHighlights.add(x);
344 }
345 }
346 return repaintIfRequired(newHighlights);
347 }
348
349 /**
350 * This is called whenever the keyboard modifier status changes
351 */
352 public void eventDispatched(AWTEvent e) {
353 if(oldEvent == null)
354 return;
355 // We don't have a mouse event, so we pass the old mouse event but the
356 // new modifiers.
357 if(giveUserFeedback(oldEvent, ((InputEvent) e).getModifiers())) {
358 mv.repaint();
359 }
360 }
361
362 /**
363 * If the left mouse button is pressed, move all currently selected
364 * objects (if one of them is under the mouse) or the current one under the
365 * mouse (which will become selected).
366 */
367 @Override
368 public void mouseDragged(MouseEvent e) {
369 if (!mv.isActiveLayerVisible())
370 return;
371
372 // Swing sends random mouseDragged events when closing dialogs by double-clicking their top-left icon on Windows
373 // Ignore such false events to prevent issues like #7078
374 if (mouseDownButton == MouseEvent.BUTTON1 && mouseReleaseTime > mouseDownTime)
375 return;
376
377 cancelDrawMode = true;
378 if (mode == Mode.select)
379 return;
380
381 // do not count anything as a move if it lasts less than 100 milliseconds.
382 if ((mode == Mode.move) && (System.currentTimeMillis() - mouseDownTime < initialMoveDelay))
383 return;
384
385 if (mode != Mode.rotate && mode != Mode.scale) // button is pressed in rotate mode
386 {
387 if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == 0)
388 return;
389 }
390
391 if (mode == Mode.move) {
392 // If ctrl is pressed we are in merge mode. Look for a nearby node,
393 // highlight it and adjust the cursor accordingly.
394 final boolean canMerge = ctrl && !getCurrentDataSet().getSelectedNodes().isEmpty();
395 final OsmPrimitive p = canMerge ? (OsmPrimitive)findNodeToMergeTo(e.getPoint()) : null;
396 boolean needsRepaint = removeHighlighting();
397 if(p != null) {
398 p.setHighlighted(true);
399 oldHighlights.add(p);
400 needsRepaint = true;
401 }
402 mv.setNewCursor(getCursor(MapView.asColl(p)), this);
403 // also update the stored mouse event, so we can display the correct cursor
404 // when dragging a node onto another one and then press CTRL to merge
405 oldEvent = e;
406 if(needsRepaint) {
407 mv.repaint();
408 }
409 }
410
411 if (startingDraggingPos == null) {
412 startingDraggingPos = new Point(e.getX(), e.getY());
413 }
414
415 if( lastMousePos == null ) {
416 lastMousePos = e.getPoint();
417 return;
418 }
419
420 if (!initialMoveThresholdExceeded) {
421 int dxp = lastMousePos.x - e.getX();
422 int dyp = lastMousePos.y - e.getY();
423 int dp = (int) Math.sqrt(dxp * dxp + dyp * dyp);
424 if (dp < initialMoveThreshold)
425 return;
426 initialMoveThresholdExceeded = true;
427 }
428
429 EastNorth currentEN = mv.getEastNorth(e.getX(), e.getY());
430 EastNorth lastEN = mv.getEastNorth(lastMousePos.x, lastMousePos.y);
431 //EastNorth startEN = mv.getEastNorth(startingDraggingPos.x, startingDraggingPos.y);
432 double dx = currentEN.east() - lastEN.east();
433 double dy = currentEN.north() - lastEN.north();
434 if (dx == 0 && dy == 0)
435 return;
436
437 if (virtualManager.virtualWays.size() > 0) {
438 virtualManager.processVirtualNodeMovements(dx, dy);
439 } else {
440 if (!updateCommandWhileDragging(dx, dy, currentEN)) return;
441 }
442
443 mv.repaint();
444 if (mode != Mode.scale) {
445 lastMousePos = e.getPoint();
446 }
447
448 didMouseDrag = true;
449 }
450
451 @Override
452 public void mouseMoved(MouseEvent e) {
453 // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
454 if ((Main.platform instanceof PlatformHookOsx) && (mode == Mode.rotate || mode == Mode.scale)) {
455 mouseDragged(e);
456 return;
457 }
458 oldEvent = e;
459 if(giveUserFeedback(e)) {
460 mv.repaint();
461 }
462 }
463
464 @Override
465 public void mouseExited(MouseEvent e) {
466 if(removeHighlighting()) {
467 mv.repaint();
468 }
469 }
470
471 /**
472 * Look, whether any object is selected. If not, select the nearest node.
473 * If there are no nodes in the dataset, do nothing.
474 *
475 * If the user did not press the left mouse button, do nothing.
476 *
477 * Also remember the starting position of the movement and change the mouse
478 * cursor to movement.
479 */
480 @Override
481 public void mousePressed(MouseEvent e) {
482 // return early
483 if (!mv.isActiveLayerVisible() || !(Boolean) this.getValue("active") || (mouseDownButton = e.getButton()) != MouseEvent.BUTTON1)
484 return;
485
486 // left-button mouse click only is processed here
487
488 // request focus in order to enable the expected keyboard shortcuts
489 mv.requestFocus();
490
491 // update which modifiers are pressed (shift, alt, ctrl)
492 updateKeyModifiers(e);
493
494 // We don't want to change to draw tool if the user tries to (de)select
495 // stuff but accidentally clicks in an empty area when selection is empty
496 cancelDrawMode = (shift || ctrl);
497 didMouseDrag = false;
498 initialMoveThresholdExceeded = false;
499 mouseDownTime = System.currentTimeMillis();
500 lastMousePos = e.getPoint();
501
502 // primitives under cursor are stored in c collection
503 Collection<OsmPrimitive> c = MapView.asColl(
504 mv.getNearestNodeOrWay(e.getPoint(), OsmPrimitive.isSelectablePredicate, true));
505
506 determineMapMode(!c.isEmpty());
507
508 switch(mode) {
509 case rotate:
510 case scale:
511 if (getCurrentDataSet().getSelected().isEmpty()) {
512 getCurrentDataSet().setSelected(c);
513 }
514
515 // Mode.select redraws when selectPrims is called
516 // Mode.move redraws when mouseDragged is called
517 // Mode.rotate redraws here
518 // Mode.scale redraws here
519 break;
520 case move:
521 if (!cancelDrawMode && c.iterator().next() instanceof Way) {
522 virtualManager.setupVirtual(e.getPoint());
523 }
524
525 selectPrims(cycleManager.cycleSetup(c, e.getPoint()), false, false);
526 break;
527 case select:
528 default:
529 selectionManager.register(mv, lassoMode);
530 selectionManager.mousePressed(e);
531 break;
532 }
533 giveUserFeedback(e);
534 mv.repaint();
535 updateStatusLine();
536 }
537
538 @Override
539 public void mouseReleased(MouseEvent e) {
540 if (!mv.isActiveLayerVisible())
541 return;
542
543 startingDraggingPos = null;
544 mouseReleaseTime = System.currentTimeMillis();
545
546 if (mode == Mode.select) {
547 selectionManager.unregister(mv);
548
549 // Select Draw Tool if no selection has been made
550 if (getCurrentDataSet().getSelected().size() == 0 && !cancelDrawMode) {
551 Main.map.selectDrawTool(true);
552 return;
553 }
554 }
555
556 if (mode == Mode.move && e.getButton() == MouseEvent.BUTTON1) {
557 if (!didMouseDrag) {
558 // only built in move mode
559 virtualManager.clear();
560 // do nothing if the click was to short too be recognized as a drag,
561 // but the release position is farther than 10px away from the press position
562 if (lastMousePos == null || lastMousePos.distanceSq(e.getPoint()) < 100) {
563 updateKeyModifiers(e);
564 selectPrims(cycleManager.cyclePrims(), true, false);
565
566 // If the user double-clicked a node, change to draw mode
567 Collection<OsmPrimitive> c = getCurrentDataSet().getSelected();
568 if (e.getClickCount() >= 2 && c.size() == 1 && c.iterator().next() instanceof Node) {
569 // We need to do it like this as otherwise drawAction will see a double
570 // click and switch back to SelectMode
571 Main.worker.execute(new Runnable() {
572 public void run() {
573 Main.map.selectDrawTool(true);
574 }
575 });
576 return;
577 }
578 }
579 } else {
580 confirmOrUndoMovement(e);
581 }
582 }
583
584 mode = null;
585
586 // simply remove any highlights if the middle click popup is active because
587 // the highlights don't depend on the cursor position there. If something was
588 // selected beforehand this would put us into move mode as well, which breaks
589 // the cycling through primitives on top of each other (see #6739).
590 if(e.getButton() == MouseEvent.BUTTON2) {
591 removeHighlighting();
592 } else {
593 giveUserFeedback(e);
594 }
595 updateStatusLine();
596 }
597
598 @Override
599 public void selectionEnded(Rectangle r, MouseEvent e) {
600 updateKeyModifiers(e);
601 mv.repaint();
602 selectPrims(selectionManager.getSelectedObjects(alt), true, true);
603 }
604
605 /**
606 * sets the mapmode according to key modifiers and if there are any
607 * selectables nearby. Everything has to be pre-determined for this
608 * function; its main purpose is to centralize what the modifiers do.
609 * @param hasSelectionNearby
610 */
611 private void determineMapMode(boolean hasSelectionNearby) {
612 if (shift && ctrl) {
613 mode = Mode.rotate;
614 } else if (alt && ctrl) {
615 mode = Mode.scale;
616 } else if (hasSelectionNearby || dragInProgress()) {
617 mode = Mode.move;
618 } else {
619 mode = Mode.select;
620 }
621 }
622
623 /** returns true whenever elements have been grabbed and moved (i.e. the initial
624 * thresholds have been exceeded) and is still in progress (i.e. mouse button
625 * still pressed)
626 */
627 final private boolean dragInProgress() {
628 return didMouseDrag && startingDraggingPos != null;
629 }
630
631
632 /**
633 * Create or update data modfication command whle dragging mouse - implementation of
634 * continuous moving, scaling and rotation
635 * @param dx, @param dy - mouse displacement
636 * @param currentEN -
637 * @return
638 */
639 private boolean updateCommandWhileDragging(double dx, double dy, EastNorth currentEN) {
640 // Currently we support only transformations which do not affect relations.
641 // So don't add them in the first place to make handling easier
642 Collection<OsmPrimitive> selection = getCurrentDataSet().getSelectedNodesAndWays();
643 Collection<Node> affectedNodes = AllNodesVisitor.getAllNodes(selection);
644 // for these transformations, having only one node makes no sense - quit silently
645 if (affectedNodes.size() < 2 && (mode == Mode.rotate || mode == Mode.scale)) {
646 return false;
647 }
648 Command c = !Main.main.undoRedo.commands.isEmpty()
649 ? Main.main.undoRedo.commands.getLast() : null;
650 if (c instanceof SequenceCommand) {
651 c = ((SequenceCommand) c).getLastCommand();
652 }
653 if (mode == Mode.move) {
654 // getCurrentDataSet().beginUpdate();
655 if (c instanceof MoveCommand && affectedNodes.equals(((MoveCommand) c).getParticipatingPrimitives())) {
656 ((MoveCommand) c).moveAgain(dx, dy);
657 } else {
658 Main.main.undoRedo.add(
659 c = new MoveCommand(selection, dx, dy));
660 }
661 //getCurrentDataSet().endUpdate();
662 for (Node n : affectedNodes) {
663 if (n.getCoor().isOutSideWorld()) {
664 // Revert move
665 ((MoveCommand) c).moveAgain(-dx, -dy);
666 JOptionPane.showMessageDialog(
667 Main.parent,
668 tr("Cannot move objects outside of the world."),
669 tr("Warning"),
670 JOptionPane.WARNING_MESSAGE);
671 mv.setNewCursor(cursor, this);
672 return false;
673 }
674 }
675 } else if (mode == Mode.rotate) {
676 if (c instanceof RotateCommand && affectedNodes.equals(((RotateCommand) c).getTransformedNodes())) {
677 ((RotateCommand) c).handleEvent(currentEN);
678 } else {
679 Main.main.undoRedo.add(new RotateCommand(selection, currentEN));
680 }
681 } else if (mode == Mode.scale) {
682 if (c instanceof ScaleCommand && affectedNodes.equals(((ScaleCommand) c).getTransformedNodes())) {
683 ((ScaleCommand) c).handleEvent(currentEN);
684 } else {
685 Main.main.undoRedo.add(new ScaleCommand(selection, currentEN));
686 }
687 }
688 return true;
689 }
690
691 private void confirmOrUndoMovement(MouseEvent e) {
692 int max = Main.pref.getInteger("warn.move.maxelements", 20), limit = max;
693 for (OsmPrimitive osm : getCurrentDataSet().getSelected()) {
694 if (osm instanceof Way) {
695 limit -= ((Way) osm).getNodes().size();
696 }
697 if ((limit -= 1) < 0) {
698 break;
699 }
700 }
701 if (limit < 0) {
702 ExtendedDialog ed = new ExtendedDialog(
703 Main.parent,
704 tr("Move elements"),
705 new String[]{tr("Move them"), tr("Undo move")});
706 ed.setButtonIcons(new String[]{"reorder.png", "cancel.png"});
707 ed.setContent(tr("You moved more than {0} elements. " + "Moving a large number of elements is often an error.\n" + "Really move them?", max));
708 ed.setCancelButton(2);
709 ed.toggleEnable("movedManyElements");
710 ed.showDialog();
711
712 if (ed.getValue() != 1) {
713 Main.main.undoRedo.undo();
714 }
715 } else {
716 // if small number of elements were moved,
717 updateKeyModifiers(e);
718 if (ctrl) mergePrims(e.getPoint());
719 }
720 getCurrentDataSet().fireSelectionChanged();
721 }
722
723 /** Merges the selected nodes to the one closest to the given mouse position iff the control
724 * key is pressed. If there is no such node, no action will be done and no error will be
725 * reported. If there is, it will execute the merge and add it to the undo buffer. */
726 final private void mergePrims(Point p) {
727 Collection<Node> selNodes = getCurrentDataSet().getSelectedNodes();
728 if (selNodes.isEmpty())
729 return;
730
731 Node target = findNodeToMergeTo(p);
732 if (target == null)
733 return;
734
735 Collection<Node> nodesToMerge = new LinkedList<Node>(selNodes);
736 nodesToMerge.add(target);
737 MergeNodesAction.doMergeNodes(Main.main.getEditLayer(), nodesToMerge, target);
738 }
739
740 /** tries to find a node to merge to when in move-merge mode for the current mouse
741 * position. Either returns the node or null, if no suitable one is nearby. */
742 final private Node findNodeToMergeTo(Point p) {
743 Collection<Node> target = mv.getNearestNodes(p,
744 getCurrentDataSet().getSelectedNodes(),
745 OsmPrimitive.isSelectablePredicate);
746 return target.isEmpty() ? null : target.iterator().next();
747 }
748
749 private void selectPrims(Collection<OsmPrimitive> prims, boolean released, boolean area) {
750 System.out.println("selectPrims:" +prims);
751 DataSet ds = getCurrentDataSet();
752
753 // not allowed together: do not change dataset selection, return early
754 // Virtual Ways: if non-empty the cursor is above a virtual node. So don't highlight
755 // anything if about to drag the virtual node (i.e. !released) but continue if the
756 // cursor is only released above a virtual node by accident (i.e. released). See #7018
757 if ((shift && ctrl) || (ctrl && !released) || (!virtualManager.virtualWays.isEmpty() && !released))
758 return;
759
760 if (!released) {
761 // Don't replace the selection if the user clicked on a
762 // selected object (it breaks moving of selected groups).
763 // Do it later, on mouse release.
764 shift |= getCurrentDataSet().getSelected().containsAll(prims);
765 }
766
767 if (ctrl) {
768 // Ctrl on an item toggles its selection status,
769 // but Ctrl on an *area* just clears those items
770 // out of the selection.
771 if (area) {
772 ds.clearSelection(prims);
773 } else {
774 ds.toggleSelected(prims);
775 }
776 } else if (shift) {
777 // add prims to an existing selection
778 ds.addSelected(prims);
779 } else {
780 // clear selection, then select the prims clicked
781 ds.setSelected(prims);
782 }
783 }
784
785 @Override
786 public String getModeHelpText() {
787 if (mode == Mode.select)
788 return tr("Release the mouse button to select the objects in the rectangle.");
789 else if (mode == Mode.move) {
790 final boolean canMerge = getCurrentDataSet()!=null && !getCurrentDataSet().getSelectedNodes().isEmpty();
791 final String mergeHelp = canMerge ? (" " + tr("Ctrl to merge with nearest node.")) : "";
792 return tr("Release the mouse button to stop moving.") + mergeHelp;
793 } else if (mode == Mode.rotate)
794 return tr("Release the mouse button to stop rotating.");
795 else if (mode == Mode.scale)
796 return tr("Release the mouse button to stop scaling.");
797 else
798 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");
799 }
800
801 @Override
802 public boolean layerIsSupported(Layer l) {
803 return l instanceof OsmDataLayer;
804 }
805
806 public void setLassoMode(boolean lassoMode) {
807 this.selectionManager.setLassoMode(lassoMode);
808 this.lassoMode = lassoMode;
809 }
810
811 CycleManager cycleManager = new CycleManager();
812 VirtualManager virtualManager = new VirtualManager();
813
814 private class CycleManager {
815 private Collection<OsmPrimitive> cycleList = Collections.emptyList();
816 private boolean cyclePrims = false;
817 private OsmPrimitive cycleStart = null;
818
819 /**
820 *
821 * @param osm nearest primitive found by simple method
822 * @param e
823 * @return
824 */
825 private Collection<OsmPrimitive> cycleSetup(Collection<OsmPrimitive> single, Point p) {
826 OsmPrimitive osm = null;
827
828 if (single != null && !single.isEmpty()) {
829 osm = single.iterator().next();
830
831 // Point p = e.getPoint();
832 boolean waitForMouseUp = Main.pref.getBoolean("mappaint.select.waits-for-mouse-up", false);
833// updateKeyModifiers(e); // cycleSetup called only after updateModifiers !
834 alt = alt || Main.pref.getBoolean("selectaction.cycles.multiple.matches", false);
835
836 if (!alt) {
837 cycleList = MapView.asColl(osm);
838
839 if (waitForMouseUp) {
840 // prefer a selected nearest node or way, if possible
841 osm = mv.getNearestNodeOrWay(p, OsmPrimitive.isSelectablePredicate, true);
842 }
843 } else {
844 cycleList = mv.getAllNearest(p, OsmPrimitive.isSelectablePredicate);
845
846 if (cycleList.size() > 1) {
847 cyclePrims = false;
848
849 OsmPrimitive old = osm;
850 for (OsmPrimitive o : cycleList) {
851 if (o.isSelected()) {
852 cyclePrims = true;
853 osm = o;
854 break;
855 }
856 }
857
858 // special case: for cycle groups of 2, we can toggle to the
859 // true nearest primitive on mousePressed right away
860 if (cycleList.size() == 2 && !waitForMouseUp) {
861 if (!(osm.equals(old) || osm.isNew() || ctrl)) {
862 cyclePrims = false;
863 osm = old;
864 } // else defer toggling to mouseRelease time in those cases:
865 /*
866 * osm == old -- the true nearest node is the selected one
867 * osm is a new node -- do not break unglue ways in ALT mode
868 * ctrl is pressed -- ctrl generally works on mouseReleased
869 */
870 }
871 }
872 }
873 }
874
875 return MapView.asColl(osm);
876 }
877
878 /**
879 * Modifies current selection state and returns the next element in a
880 * selection cycle given by <code>prims</code>.
881 * @param prims the primitives that form the selection cycle
882 * @param mouse event
883 * @return the next element of cycle list <code>prims</code>.
884 */
885 private Collection<OsmPrimitive> cyclePrims() {
886 Collection<OsmPrimitive> prims = cycleList;
887 OsmPrimitive nxt = null;
888
889 if (prims.size() > 1) {
890// updateKeyModifiers(e); // already called before !
891
892 DataSet ds = getCurrentDataSet();
893 OsmPrimitive first = prims.iterator().next(), foundInDS = null;
894 nxt = first;
895
896 for (Iterator<OsmPrimitive> i = prims.iterator(); i.hasNext();) {
897 if (cyclePrims && shift) {
898 if (!(nxt = i.next()).isSelected()) {
899 break; // take first primitive in prims list not in sel
900 }
901 } else {
902 if ((nxt = i.next()).isSelected()) {
903 foundInDS = nxt;
904 if (cyclePrims || ctrl) {
905 ds.clearSelection(foundInDS);
906 nxt = i.hasNext() ? i.next() : first;
907 }
908 break; // take next primitive in prims list
909 }
910 }
911 }
912
913 if (ctrl) {
914 // a member of prims was found in the current dataset selection
915 if (foundInDS != null) {
916 // mouse was moved to a different selection group w/ a previous sel
917 if (!prims.contains(cycleStart)) {
918 ds.clearSelection(prims);
919 cycleStart = foundInDS;
920 } else if (cycleStart.equals(nxt)) {
921 // loop detected, insert deselect step
922 ds.addSelected(nxt);
923 }
924 } else {
925 // setup for iterating a sel group again or a new, different one..
926 nxt = (prims.contains(cycleStart)) ? cycleStart : first;
927 cycleStart = nxt;
928 }
929 } else {
930 cycleStart = null;
931 }
932 }
933
934 // pass on prims, if it had less than 2 elements
935 return (nxt != null) ? MapView.asColl(nxt) : prims;
936 }
937
938 }
939
940 private class VirtualManager {
941
942 private Node virtualNode = null;
943 private Collection<WaySegment> virtualWays = new LinkedList<WaySegment>();
944
945
946 /**
947 * Calculate a virtual node if there is enough visual space to draw a crosshair
948 * node and the middle of a way segment is clicked. If the user drags the
949 * crosshair node, it will be added to all ways in <code>virtualWays</code>.
950 *
951 * @param e contains the point clicked
952 * @return whether <code>virtualNode</code> and <code>virtualWays</code> were setup.
953 */
954 private boolean setupVirtual(Point p) {
955 if (Main.pref.getInteger("mappaint.node.virtual-size", 8) > 0) {
956 int virtualSnapDistSq = Main.pref.getInteger("mappaint.node.virtual-snap-distance", 8);
957 int virtualSpace = Main.pref.getInteger("mappaint.node.virtual-space", 70);
958 virtualSnapDistSq *= virtualSnapDistSq;
959
960 Collection<WaySegment> selVirtualWays = new LinkedList<WaySegment>();
961 Pair<Node, Node> vnp = null, wnp = new Pair<Node, Node>(null, null);
962
963 Way w = null;
964 for (WaySegment ws : mv.getNearestWaySegments(p, OsmPrimitive.isSelectablePredicate)) {
965 w = ws.way;
966
967 Point2D p1 = mv.getPoint2D(wnp.a = w.getNode(ws.lowerIndex));
968 Point2D p2 = mv.getPoint2D(wnp.b = w.getNode(ws.lowerIndex + 1));
969 if (WireframeMapRenderer.isLargeSegment(p1, p2, virtualSpace)) {
970 Point2D pc = new Point2D.Double((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
971 if (p.distanceSq(pc) < virtualSnapDistSq) {
972 // Check that only segments on top of each other get added to the
973 // virtual ways list. Otherwise ways that coincidentally have their
974 // virtual node at the same spot will be joined which is likely unwanted
975 Pair.sort(wnp);
976 if (vnp == null) {
977 vnp = new Pair<Node, Node>(wnp.a, wnp.b);
978 virtualNode = new Node(mv.getLatLon(pc.getX(), pc.getY()));
979 }
980 if (vnp.equals(wnp)) {
981 (w.isSelected() ? selVirtualWays : virtualWays).add(ws);
982 }
983 }
984 }
985 }
986
987 if (!selVirtualWays.isEmpty()) {
988 virtualWays = selVirtualWays;
989 }
990 }
991
992 return !virtualWays.isEmpty();
993 }
994
995 private void processVirtualNodeMovements(double dx, double dy) {
996 Collection<Command> virtualCmds = new LinkedList<Command>();
997 virtualCmds.add(new AddCommand(virtualNode));
998 for (WaySegment virtualWay : virtualWays) {
999 Way w = virtualWay.way;
1000 Way wnew = new Way(w);
1001 wnew.addNode(virtualWay.lowerIndex + 1, virtualNode);
1002 virtualCmds.add(new ChangeCommand(w, wnew));
1003 }
1004 virtualCmds.add(new MoveCommand(virtualNode, dx, dy));
1005 String text = trn("Add and move a virtual new node to way",
1006 "Add and move a virtual new node to {0} ways", virtualWays.size(),
1007 virtualWays.size());
1008 Main.main.undoRedo.add(new SequenceCommand(text, virtualCmds));
1009 getCurrentDataSet().setSelected(Collections.singleton((OsmPrimitive) virtualNode));
1010 clear();
1011 }
1012
1013 private void clear() {
1014 virtualWays.clear();
1015 virtualNode = null;
1016 }
1017
1018 private boolean hasVirtualNode() {
1019 return virtualNode != null;
1020 }
1021 }
1022}