source: josm/trunk/src/org/openstreetmap/josm/gui/MapView.java@ 5903

Last change on this file since 5903 was 5670, checked in by bastiK, 11 years ago

session: save & restore map position and scale (see #4029)
  • Property svn:eol-style set to native
File size: 30.7 KB
Line 
1// License: GPL. See LICENSE file for details.
2package org.openstreetmap.josm.gui;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.awt.AlphaComposite;
7import java.awt.Color;
8import java.awt.Graphics;
9import java.awt.Graphics2D;
10import java.awt.Point;
11import java.awt.Rectangle;
12import java.awt.event.ComponentAdapter;
13import java.awt.event.ComponentEvent;
14import java.awt.event.MouseEvent;
15import java.awt.event.MouseMotionListener;
16import java.awt.geom.Area;
17import java.awt.geom.GeneralPath;
18import java.awt.image.BufferedImage;
19import java.beans.PropertyChangeEvent;
20import java.beans.PropertyChangeListener;
21import java.util.ArrayList;
22import java.util.Collection;
23import java.util.Collections;
24import java.util.Comparator;
25import java.util.Enumeration;
26import java.util.LinkedList;
27import java.util.List;
28import java.util.concurrent.CopyOnWriteArrayList;
29
30import javax.swing.AbstractButton;
31import javax.swing.ActionMap;
32import javax.swing.InputMap;
33import javax.swing.JOptionPane;
34import javax.swing.JPanel;
35
36import org.openstreetmap.josm.Main;
37import org.openstreetmap.josm.actions.AutoScaleAction;
38import org.openstreetmap.josm.actions.mapmode.MapMode;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.Preferences.PreferenceChangeEvent;
41import org.openstreetmap.josm.data.Preferences.PreferenceChangedListener;
42import org.openstreetmap.josm.data.SelectionChangedListener;
43import org.openstreetmap.josm.data.coor.LatLon;
44import org.openstreetmap.josm.data.osm.DataSet;
45import org.openstreetmap.josm.data.osm.DataSource;
46import org.openstreetmap.josm.data.osm.OsmPrimitive;
47import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
48import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
49import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
50import org.openstreetmap.josm.gui.layer.GpxLayer;
51import org.openstreetmap.josm.gui.layer.Layer;
52import org.openstreetmap.josm.gui.layer.MapViewPaintable;
53import org.openstreetmap.josm.gui.layer.OsmDataLayer;
54import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
55import org.openstreetmap.josm.gui.layer.markerlayer.PlayHeadMarker;
56import org.openstreetmap.josm.tools.AudioPlayer;
57import org.openstreetmap.josm.tools.BugReportExceptionHandler;
58
59/**
60 * This is a component used in the {@link MapFrame} for browsing the map. It use is to
61 * provide the MapMode's enough capabilities to operate.<br/><br/>
62 *
63 * {@code MapView} holds meta-data about the data set currently displayed, as scale level,
64 * center point viewed, what scrolling mode or editing mode is selected or with
65 * what projection the map is viewed etc..<br/><br/>
66 *
67 * {@code MapView} is able to administrate several layers.
68 *
69 * @author imi
70 */
71public class MapView extends NavigatableComponent implements PropertyChangeListener, PreferenceChangedListener, OsmDataLayer.LayerStateChangeListener {
72
73 /**
74 * Interface to notify listeners of a layer change.
75 * @author imi
76 */
77 public interface LayerChangeListener {
78
79 /**
80 * Notifies this listener that the active layer has changed.
81 * @param oldLayer The previous active layer
82 * @param newLayer The new activer layer
83 */
84 void activeLayerChange(Layer oldLayer, Layer newLayer);
85
86 /**
87 * Notifies this listener that a layer has been added.
88 * @param newLayer The new added layer
89 */
90 void layerAdded(Layer newLayer);
91
92 /**
93 * Notifies this listener that a layer has been removed.
94 * @param oldLayer The old removed layer
95 */
96 void layerRemoved(Layer oldLayer);
97 }
98
99 public interface EditLayerChangeListener {
100 void editLayerChanged(OsmDataLayer oldLayer, OsmDataLayer newLayer);
101 }
102
103 public boolean viewportFollowing = false;
104
105 /**
106 * the layer listeners
107 */
108 private static final CopyOnWriteArrayList<LayerChangeListener> layerChangeListeners = new CopyOnWriteArrayList<LayerChangeListener>();
109 private static final CopyOnWriteArrayList<EditLayerChangeListener> editLayerChangeListeners = new CopyOnWriteArrayList<EditLayerChangeListener>();
110
111 /**
112 * Removes a layer change listener
113 *
114 * @param listener the listener. Ignored if null or already registered.
115 */
116 public static void removeLayerChangeListener(LayerChangeListener listener) {
117 layerChangeListeners.remove(listener);
118 }
119
120 public static void removeEditLayerChangeListener(EditLayerChangeListener listener) {
121 editLayerChangeListeners.remove(listener);
122 }
123
124 /**
125 * Adds a layer change listener
126 *
127 * @param listener the listener. Ignored if null or already registered.
128 */
129 public static void addLayerChangeListener(LayerChangeListener listener) {
130 if (listener != null) {
131 layerChangeListeners.addIfAbsent(listener);
132 }
133 }
134
135 /**
136 * Adds an edit layer change listener
137 *
138 * @param listener the listener. Ignored if null or already registered.
139 * @param initialFire Fire an edit-layer-changed-event right after adding
140 * the listener in case there is an edit layer present
141 */
142 public static void addEditLayerChangeListener(EditLayerChangeListener listener, boolean initialFire) {
143 addEditLayerChangeListener(listener);
144 if (initialFire) {
145 if (Main.isDisplayingMapView() && Main.map.mapView.getEditLayer() != null) {
146 fireEditLayerChanged(null, Main.map.mapView.getEditLayer());
147 }
148 }
149 }
150
151 /**
152 * Adds an edit layer change listener
153 *
154 * @param listener the listener. Ignored if null or already registered.
155 */
156 public static void addEditLayerChangeListener(EditLayerChangeListener listener) {
157 if (listener != null) {
158 editLayerChangeListeners.addIfAbsent(listener);
159 }
160 }
161
162 protected static void fireActiveLayerChanged(Layer oldLayer, Layer newLayer) {
163 for (LayerChangeListener l : layerChangeListeners) {
164 l.activeLayerChange(oldLayer, newLayer);
165 }
166 }
167
168 protected static void fireLayerAdded(Layer newLayer) {
169 for (MapView.LayerChangeListener l : MapView.layerChangeListeners) {
170 l.layerAdded(newLayer);
171 }
172 }
173
174 protected static void fireLayerRemoved(Layer layer) {
175 for (MapView.LayerChangeListener l : MapView.layerChangeListeners) {
176 l.layerRemoved(layer);
177 }
178 }
179
180 protected static void fireEditLayerChanged(OsmDataLayer oldLayer, OsmDataLayer newLayer) {
181 for (EditLayerChangeListener l : editLayerChangeListeners) {
182 l.editLayerChanged(oldLayer, newLayer);
183 }
184 }
185
186 /**
187 * A list of all layers currently loaded.
188 */
189 private final List<Layer> layers = new ArrayList<Layer>();
190 /**
191 * The play head marker: there is only one of these so it isn't in any specific layer
192 */
193 public PlayHeadMarker playHeadMarker = null;
194
195 /**
196 * The layer from the layers list that is currently active.
197 */
198 private Layer activeLayer;
199
200 private OsmDataLayer editLayer;
201
202 /**
203 * The last event performed by mouse.
204 */
205 public MouseEvent lastMEvent = new MouseEvent(this, 0, 0, 0, 0, 0, 0, false); // In case somebody reads it before first mouse move
206
207 private LinkedList<MapViewPaintable> temporaryLayers = new LinkedList<MapViewPaintable>();
208
209 private BufferedImage nonChangedLayersBuffer;
210 private BufferedImage offscreenBuffer;
211 // Layers that wasn't changed since last paint
212 private final List<Layer> nonChangedLayers = new ArrayList<Layer>();
213 private Layer changedLayer;
214 private int lastViewID;
215 private boolean paintPreferencesChanged = true;
216 private Rectangle lastClipBounds = new Rectangle();
217 private MapMover mapMover;
218
219 /**
220 * Constructs a new {@code MapView}.
221 * @param contentPane The content pane used to register shortcuts in its
222 * {@link InputMap} and {@link ActionMap}
223 * @param viewportData the initial viewport of the map. Can be null, then
224 * the viewport is derived from the layer data.
225 */
226 public MapView(final JPanel contentPane, final ViewportData viewportData) {
227 Main.pref.addPreferenceChangeListener(this);
228
229 addComponentListener(new ComponentAdapter(){
230 @Override public void componentResized(ComponentEvent e) {
231 removeComponentListener(this);
232
233 MapSlider zoomSlider = new MapSlider(MapView.this);
234 add(zoomSlider);
235 zoomSlider.setBounds(3, 0, 114, 30);
236
237 MapScaler scaler = new MapScaler(MapView.this);
238 add(scaler);
239 scaler.setLocation(10,30);
240
241 mapMover = new MapMover(MapView.this, contentPane);
242 if (viewportData != null) {
243 zoomTo(viewportData.getCenter(), viewportData.getScale());
244 } else {
245 OsmDataLayer layer = getEditLayer();
246 if (layer != null) {
247 if (!zoomToDataSetBoundingBox(layer.data)) {
248 // no bounding box defined
249 AutoScaleAction.autoScale("data");
250 }
251 } else {
252 AutoScaleAction.autoScale("layer");
253 }
254 }
255 }
256 });
257
258 // listend to selection changes to redraw the map
259 DataSet.addSelectionListener(repaintSelectionChangedListener);
260
261 //store the last mouse action
262 this.addMouseMotionListener(new MouseMotionListener() {
263 public void mouseDragged(MouseEvent e) {
264 mouseMoved(e);
265 }
266 public void mouseMoved(MouseEvent e) {
267 lastMEvent = e;
268 }
269 });
270 }
271
272 /**
273 * Adds a GPX layer. A GPX layer is added below the lowest data layer.
274 *
275 * @param layer the GPX layer
276 */
277 protected void addGpxLayer(GpxLayer layer) {
278 if (layers.isEmpty()) {
279 layers.add(layer);
280 return;
281 }
282 for (int i=layers.size()-1; i>= 0; i--) {
283 if (layers.get(i) instanceof OsmDataLayer) {
284 if (i == layers.size()-1) {
285 layers.add(layer);
286 } else {
287 layers.add(i+1, layer);
288 }
289 return;
290 }
291 }
292 layers.add(0, layer);
293 }
294
295 /**
296 * Add a layer to the current MapView. The layer will be added at topmost
297 * position.
298 * @param layer The layer to add
299 */
300 public void addLayer(Layer layer) {
301 if (layer instanceof MarkerLayer && playHeadMarker == null) {
302 playHeadMarker = PlayHeadMarker.create();
303 }
304
305 if (layer instanceof GpxLayer) {
306 addGpxLayer((GpxLayer)layer);
307 } else if (layers.isEmpty()) {
308 layers.add(layer);
309 } else if (layer.isBackgroundLayer()) {
310 int i = 0;
311 for (; i < layers.size(); i++) {
312 if (layers.get(i).isBackgroundLayer()) {
313 break;
314 }
315 }
316 layers.add(i, layer);
317 } else {
318 layers.add(0, layer);
319 }
320 fireLayerAdded(layer);
321 boolean isOsmDataLayer = layer instanceof OsmDataLayer;
322 if (isOsmDataLayer) {
323 ((OsmDataLayer)layer).addLayerStateChangeListener(this);
324 }
325 boolean callSetActiveLayer = isOsmDataLayer || activeLayer == null;
326 if (callSetActiveLayer) {
327 // autoselect the new layer
328 setActiveLayer(layer); // also repaints this MapView
329 }
330 layer.addPropertyChangeListener(this);
331 Main.addProjectionChangeListener(layer);
332 AudioPlayer.reset();
333 if (!callSetActiveLayer) {
334 repaint();
335 }
336 }
337
338 @Override
339 protected DataSet getCurrentDataSet() {
340 if (editLayer != null)
341 return editLayer.data;
342 else
343 return null;
344 }
345
346 /**
347 * Replies true if the active layer is drawable.
348 *
349 * @return true if the active layer is drawable, false otherwise
350 */
351 public boolean isActiveLayerDrawable() {
352 return editLayer != null;
353 }
354
355 /**
356 * Replies true if the active layer is visible.
357 *
358 * @return true if the active layer is visible, false otherwise
359 */
360 public boolean isActiveLayerVisible() {
361 return isActiveLayerDrawable() && editLayer.isVisible();
362 }
363
364 /**
365 * Determines the next active data layer according to the following
366 * rules:
367 * <ul>
368 * <li>if there is at least one {@link OsmDataLayer} the first one
369 * becomes active</li>
370 * <li>otherwise, the top most layer of any type becomes active</li>
371 * </ul>
372 *
373 * @return the next active data layer
374 */
375 protected Layer determineNextActiveLayer(List<Layer> layersList) {
376 // First look for data layer
377 for (Layer layer:layersList) {
378 if (layer instanceof OsmDataLayer)
379 return layer;
380 }
381
382 // Then any layer
383 if (!layersList.isEmpty())
384 return layersList.get(0);
385
386 // and then give up
387 return null;
388
389 }
390
391 /**
392 * Remove the layer from the mapview. If the layer was in the list before,
393 * an LayerChange event is fired.
394 * @param layer The layer to remove
395 */
396 public void removeLayer(Layer layer) {
397 List<Layer> layersList = new ArrayList<Layer>(layers);
398
399 if (!layersList.remove(layer))
400 return;
401
402 setEditLayer(layersList);
403
404 if (layer == activeLayer) {
405 setActiveLayer(determineNextActiveLayer(layersList), false);
406 }
407
408 if (layer instanceof OsmDataLayer) {
409 ((OsmDataLayer)layer).removeLayerPropertyChangeListener(this);
410 }
411
412 layers.remove(layer);
413 Main.removeProjectionChangeListener(layer);
414 fireLayerRemoved(layer);
415 layer.removePropertyChangeListener(this);
416 layer.destroy();
417 AudioPlayer.reset();
418 repaint();
419 }
420
421 private boolean virtualNodesEnabled = false;
422
423 public void setVirtualNodesEnabled(boolean enabled) {
424 if(virtualNodesEnabled != enabled) {
425 virtualNodesEnabled = enabled;
426 repaint();
427 }
428 }
429 public boolean isVirtualNodesEnabled() {
430 return virtualNodesEnabled;
431 }
432
433 /**
434 * Moves the layer to the given new position. No event is fired, but repaints
435 * according to the new Z-Order of the layers.
436 *
437 * @param layer The layer to move
438 * @param pos The new position of the layer
439 */
440 public void moveLayer(Layer layer, int pos) {
441 int curLayerPos = layers.indexOf(layer);
442 if (curLayerPos == -1)
443 throw new IllegalArgumentException(tr("Layer not in list."));
444 if (pos == curLayerPos)
445 return; // already in place.
446 layers.remove(curLayerPos);
447 if (pos >= layers.size()) {
448 layers.add(layer);
449 } else {
450 layers.add(pos, layer);
451 }
452 setEditLayer(layers);
453 AudioPlayer.reset();
454 repaint();
455 }
456
457 public int getLayerPos(Layer layer) {
458 int curLayerPos = layers.indexOf(layer);
459 if (curLayerPos == -1)
460 throw new IllegalArgumentException(tr("Layer not in list."));
461 return curLayerPos;
462 }
463
464 /**
465 * Creates a list of the visible layers in Z-Order, the layer with the lowest Z-Order
466 * first, layer with the highest Z-Order last.
467 *
468 * @return a list of the visible in Z-Order, the layer with the lowest Z-Order
469 * first, layer with the highest Z-Order last.
470 */
471 protected List<Layer> getVisibleLayersInZOrder() {
472 ArrayList<Layer> ret = new ArrayList<Layer>();
473 for (Layer l: layers) {
474 if (l.isVisible()) {
475 ret.add(l);
476 }
477 }
478 // sort according to position in the list of layers, with one exception:
479 // an active data layer always becomes a higher Z-Order than all other
480 // data layers
481 //
482 Collections.sort(
483 ret,
484 new Comparator<Layer>() {
485 public int compare(Layer l1, Layer l2) {
486 if (l1 instanceof OsmDataLayer && l2 instanceof OsmDataLayer) {
487 if (l1 == getActiveLayer()) return -1;
488 if (l2 == getActiveLayer()) return 1;
489 return Integer.valueOf(layers.indexOf(l1)).compareTo(layers.indexOf(l2));
490 } else
491 return Integer.valueOf(layers.indexOf(l1)).compareTo(layers.indexOf(l2));
492 }
493 }
494 );
495 Collections.reverse(ret);
496 return ret;
497 }
498
499 private void paintLayer(Layer layer, Graphics2D g, Bounds box) {
500 if (layer.getOpacity() < 1) {
501 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,(float)layer.getOpacity()));
502 }
503 layer.paint(g, this, box);
504 g.setPaintMode();
505 }
506
507 /**
508 * Draw the component.
509 */
510 @Override public void paint(Graphics g) {
511 if (BugReportExceptionHandler.exceptionHandlingInProgress())
512 return;
513
514 if (center == null)
515 return; // no data loaded yet.
516
517 List<Layer> visibleLayers = getVisibleLayersInZOrder();
518
519 int nonChangedLayersCount = 0;
520 for (Layer l: visibleLayers) {
521 if (l.isChanged() || l == changedLayer) {
522 break;
523 } else {
524 nonChangedLayersCount++;
525 }
526 }
527
528 boolean canUseBuffer;
529
530 synchronized (this) {
531 canUseBuffer = !paintPreferencesChanged;
532 paintPreferencesChanged = false;
533 }
534 canUseBuffer = canUseBuffer && nonChangedLayers.size() <= nonChangedLayersCount &&
535 lastViewID == getViewID() && lastClipBounds.contains(g.getClipBounds());
536 if (canUseBuffer) {
537 for (int i=0; i<nonChangedLayers.size(); i++) {
538 if (visibleLayers.get(i) != nonChangedLayers.get(i)) {
539 canUseBuffer = false;
540 break;
541 }
542 }
543 }
544
545 if (null == offscreenBuffer || offscreenBuffer.getWidth() != getWidth() || offscreenBuffer.getHeight() != getHeight()) {
546 offscreenBuffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_3BYTE_BGR);
547 }
548
549 Graphics2D tempG = offscreenBuffer.createGraphics();
550 tempG.setClip(g.getClip());
551 Bounds box = getLatLonBounds(g.getClipBounds());
552
553 if (!canUseBuffer || nonChangedLayersBuffer == null) {
554 if (null == nonChangedLayersBuffer || nonChangedLayersBuffer.getWidth() != getWidth() || nonChangedLayersBuffer.getHeight() != getHeight()) {
555 nonChangedLayersBuffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_3BYTE_BGR);
556 }
557 Graphics2D g2 = nonChangedLayersBuffer.createGraphics();
558 g2.setClip(g.getClip());
559 g2.setColor(PaintColors.getBackgroundColor());
560 g2.fillRect(0, 0, getWidth(), getHeight());
561
562 for (int i=0; i<nonChangedLayersCount; i++) {
563 paintLayer(visibleLayers.get(i),g2, box);
564 }
565 } else {
566 // Maybe there were more unchanged layers then last time - draw them to buffer
567 if (nonChangedLayers.size() != nonChangedLayersCount) {
568 Graphics2D g2 = nonChangedLayersBuffer.createGraphics();
569 g2.setClip(g.getClip());
570 for (int i=nonChangedLayers.size(); i<nonChangedLayersCount; i++) {
571 paintLayer(visibleLayers.get(i),g2, box);
572 }
573 }
574 }
575
576 nonChangedLayers.clear();
577 changedLayer = null;
578 for (int i=0; i<nonChangedLayersCount; i++) {
579 nonChangedLayers.add(visibleLayers.get(i));
580 }
581 lastViewID = getViewID();
582 lastClipBounds = g.getClipBounds();
583
584 tempG.drawImage(nonChangedLayersBuffer, 0, 0, null);
585
586 for (int i=nonChangedLayersCount; i<visibleLayers.size(); i++) {
587 paintLayer(visibleLayers.get(i),tempG, box);
588 }
589
590 for (MapViewPaintable mvp : temporaryLayers) {
591 mvp.paint(tempG, this, box);
592 }
593
594 // draw world borders
595 tempG.setColor(Color.WHITE);
596 Bounds b = getProjection().getWorldBoundsLatLon();
597 double lat = b.getMin().lat();
598 double lon = b.getMin().lon();
599
600 Point p = getPoint(b.getMin());
601
602 GeneralPath path = new GeneralPath();
603
604 path.moveTo(p.x, p.y);
605 double max = b.getMax().lat();
606 for(; lat <= max; lat += 1.0)
607 {
608 p = getPoint(new LatLon(lat >= max ? max : lat, lon));
609 path.lineTo(p.x, p.y);
610 }
611 lat = max; max = b.getMax().lon();
612 for(; lon <= max; lon += 1.0)
613 {
614 p = getPoint(new LatLon(lat, lon >= max ? max : lon));
615 path.lineTo(p.x, p.y);
616 }
617 lon = max; max = b.getMin().lat();
618 for(; lat >= max; lat -= 1.0)
619 {
620 p = getPoint(new LatLon(lat <= max ? max : lat, lon));
621 path.lineTo(p.x, p.y);
622 }
623 lat = max; max = b.getMin().lon();
624 for(; lon >= max; lon -= 1.0)
625 {
626 p = getPoint(new LatLon(lat, lon <= max ? max : lon));
627 path.lineTo(p.x, p.y);
628 }
629
630 int w = getWidth();
631 int h = getHeight();
632
633 // Work around OpenJDK having problems when drawing out of bounds
634 final Area border = new Area(path);
635 // Make the viewport 1px larger in every direction to prevent an
636 // additional 1px border when zooming in
637 final Area viewport = new Area(new Rectangle(-1, -1, w + 2, h + 2));
638 border.intersect(viewport);
639 tempG.draw(border);
640
641 if (Main.isDisplayingMapView() && Main.map.filterDialog != null) {
642 Main.map.filterDialog.drawOSDText(tempG);
643 }
644
645 if (playHeadMarker != null) {
646 playHeadMarker.paint(tempG, this);
647 }
648
649 g.drawImage(offscreenBuffer, 0, 0, null);
650 super.paint(g);
651 }
652
653 /**
654 * Set the new dimension to the view.
655 */
656 public void recalculateCenterScale(BoundingXYVisitor box) {
657 if (box == null) {
658 box = new BoundingXYVisitor();
659 }
660 if (box.getBounds() == null) {
661 box.visit(getProjection().getWorldBoundsLatLon());
662 }
663 if (!box.hasExtend()) {
664 box.enlargeBoundingBox();
665 }
666
667 zoomTo(box.getBounds());
668 }
669
670 /**
671 * @return An unmodifiable collection of all layers
672 */
673 public Collection<Layer> getAllLayers() {
674 return Collections.unmodifiableCollection(layers);
675 }
676
677 /**
678 * @return An unmodifiable ordered list of all layers
679 */
680 public List<Layer> getAllLayersAsList() {
681 return Collections.unmodifiableList(layers);
682 }
683
684 /**
685 * Replies an unmodifiable list of layers of a certain type.
686 *
687 * Example:
688 * <pre>
689 * List<WMSLayer> wmsLayers = getLayersOfType(WMSLayer.class);
690 * </pre>
691 *
692 * @return an unmodifiable list of layers of a certain type.
693 */
694 public <T> List<T> getLayersOfType(Class<T> ofType) {
695 ArrayList<T> ret = new ArrayList<T>();
696 for (Layer layer : getAllLayersAsList()) {
697 if (ofType.isInstance(layer)) {
698 ret.add(ofType.cast(layer));
699 }
700 }
701 return ret;
702 }
703
704 /**
705 * Replies the number of layers managed by this mav view
706 *
707 * @return the number of layers managed by this mav view
708 */
709 public int getNumLayers() {
710 return layers.size();
711 }
712
713 /**
714 * Replies true if there is at least one layer in this map view
715 *
716 * @return true if there is at least one layer in this map view
717 */
718 public boolean hasLayers() {
719 return getNumLayers() > 0;
720 }
721
722 private void setEditLayer(List<Layer> layersList) {
723 OsmDataLayer newEditLayer = layersList.contains(editLayer)?editLayer:null;
724 OsmDataLayer oldEditLayer = editLayer;
725
726 // Find new edit layer
727 if (activeLayer != editLayer || !layersList.contains(editLayer)) {
728 if (activeLayer instanceof OsmDataLayer && layersList.contains(activeLayer)) {
729 newEditLayer = (OsmDataLayer) activeLayer;
730 } else {
731 for (Layer layer:layersList) {
732 if (layer instanceof OsmDataLayer) {
733 newEditLayer = (OsmDataLayer) layer;
734 break;
735 }
736 }
737 }
738 }
739
740 // Set new edit layer
741 if (newEditLayer != editLayer) {
742 if (newEditLayer == null) {
743 getCurrentDataSet().setSelected();
744 }
745
746 editLayer = newEditLayer;
747 fireEditLayerChanged(oldEditLayer, newEditLayer);
748 refreshTitle();
749 }
750
751 }
752
753 /**
754 * Sets the active layer to <code>layer</code>. If <code>layer</code> is an instance
755 * of {@link OsmDataLayer} also sets {@link #editLayer} to <code>layer</code>.
756 *
757 * @param layer the layer to be activate; must be one of the layers in the list of layers
758 * @exception IllegalArgumentException thrown if layer is not in the lis of layers
759 */
760 public void setActiveLayer(Layer layer) {
761 setActiveLayer(layer, true);
762 }
763
764 private void setActiveLayer(Layer layer, boolean setEditLayer) {
765 if (layer != null && !layers.contains(layer))
766 throw new IllegalArgumentException(tr("Layer ''{0}'' must be in list of layers", layer.toString()));
767
768 if (layer == activeLayer)
769 return;
770
771 Layer old = activeLayer;
772 activeLayer = layer;
773 if (setEditLayer) {
774 setEditLayer(layers);
775 }
776 fireActiveLayerChanged(old, layer);
777
778 /* This only makes the buttons look disabled. Disabling the actions as well requires
779 * the user to re-select the tool after i.e. moving a layer. While testing I found
780 * that I switch layers and actions at the same time and it was annoying to mind the
781 * order. This way it works as visual clue for new users */
782 for (Enumeration<AbstractButton> e = Main.map.toolGroup.getElements() ; e.hasMoreElements() ;) {
783 AbstractButton button = e.nextElement();
784 MapMode mode = (MapMode)button.getAction();
785 boolean isLayerSupported = mode.layerIsSupported(layer);
786 button.setEnabled(isLayerSupported);
787 // Also update associated shortcut (fix #6876)
788 if (isLayerSupported) {
789 Main.registerActionShortcut(mode, mode.getShortcut());
790 } else {
791 Main.unregisterShortcut(mode.getShortcut());
792 }
793 }
794 AudioPlayer.reset();
795 repaint();
796 }
797
798 /**
799 * Replies the currently active layer
800 *
801 * @return the currently active layer (may be null)
802 */
803 public Layer getActiveLayer() {
804 return activeLayer;
805 }
806
807 /**
808 * Replies the current edit layer, if any
809 *
810 * @return the current edit layer. May be null.
811 */
812 public OsmDataLayer getEditLayer() {
813 return editLayer;
814 }
815
816 /**
817 * replies true if the list of layers managed by this map view contain layer
818 *
819 * @param layer the layer
820 * @return true if the list of layers managed by this map view contain layer
821 */
822 public boolean hasLayer(Layer layer) {
823 return layers.contains(layer);
824 }
825
826 /**
827 * Tries to zoom to the download boundingbox[es] of the current edit layer
828 * (aka {@link OsmDataLayer}). If the edit layer has multiple download bounding
829 * boxes it zooms to a large virtual bounding box containing all smaller ones.
830 *
831 * @return <code>true</code> if a zoom operation has been performed
832 */
833 public boolean zoomToDataSetBoundingBox(DataSet ds) {
834 // In case we already have an existing data layer ...
835 OsmDataLayer layer= getEditLayer();
836 if (layer == null)
837 return false;
838 Collection<DataSource> dataSources = ds.dataSources;
839 // ... with bounding box[es] of data loaded from OSM or a file...
840 BoundingXYVisitor bbox = new BoundingXYVisitor();
841 for (DataSource source : dataSources) {
842 bbox.visit(source.bounds);
843 }
844 if (bbox.hasExtend()) {
845 // ... we zoom to it's bounding box
846 recalculateCenterScale(bbox);
847 return true;
848 }
849 return false;
850 }
851
852 public boolean addTemporaryLayer(MapViewPaintable mvp) {
853 if (temporaryLayers.contains(mvp)) return false;
854 return temporaryLayers.add(mvp);
855 }
856
857 public boolean removeTemporaryLayer(MapViewPaintable mvp) {
858 return temporaryLayers.remove(mvp);
859 }
860
861 public void propertyChange(PropertyChangeEvent evt) {
862 if (evt.getPropertyName().equals(Layer.VISIBLE_PROP)) {
863 repaint();
864 } else if (evt.getPropertyName().equals(Layer.OPACITY_PROP)) {
865 Layer l = (Layer)evt.getSource();
866 if (l.isVisible()) {
867 changedLayer = l;
868 repaint();
869 }
870 } else if (evt.getPropertyName().equals(OsmDataLayer.REQUIRES_SAVE_TO_DISK_PROP)
871 || evt.getPropertyName().equals(OsmDataLayer.REQUIRES_UPLOAD_TO_SERVER_PROP)) {
872 OsmDataLayer layer = (OsmDataLayer)evt.getSource();
873 if (layer == getEditLayer()) {
874 refreshTitle();
875 }
876 }
877 }
878
879 protected void refreshTitle() {
880 boolean dirty = editLayer != null && (editLayer.requiresSaveToFile() || (editLayer.requiresUploadToServer() && !editLayer.isUploadDiscouraged()));
881 if (dirty) {
882 JOptionPane.getFrameForComponent(Main.parent).setTitle("* " + tr("Java OpenStreetMap Editor"));
883 } else {
884 JOptionPane.getFrameForComponent(Main.parent).setTitle(tr("Java OpenStreetMap Editor"));
885 }
886 }
887
888 @Override
889 public void preferenceChanged(PreferenceChangeEvent e) {
890 synchronized (this) {
891 paintPreferencesChanged = true;
892 }
893 }
894
895 private SelectionChangedListener repaintSelectionChangedListener = new SelectionChangedListener(){
896 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
897 repaint();
898 }
899 };
900
901 public void destroy() {
902 Main.pref.removePreferenceChangeListener(this);
903 DataSet.removeSelectionListener(repaintSelectionChangedListener);
904 MultipolygonCache.getInstance().clear(this);
905 if (mapMover != null) {
906 mapMover.destroy();
907 }
908 }
909
910 @Override
911 public void uploadDiscouragedChanged(OsmDataLayer layer, boolean newValue) {
912 if (layer == getEditLayer()) {
913 refreshTitle();
914 }
915 }
916}
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