source: josm/trunk/src/org/openstreetmap/josm/gui/MapView.java@ 11279

Last change on this file since 11279 was 11226, checked in by michael2402, 7 years ago

MapView: Allow public access to paintLayer.

This allows plugins like the areaselector to access the drawing code of the map view.

See ​https://github.com/JOSM/areaselector/issues/25
  • Property svn:eol-style set to native
File size: 31.5 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui;
3
4import java.awt.AlphaComposite;
5import java.awt.Color;
6import java.awt.Dimension;
7import java.awt.Graphics;
8import java.awt.Graphics2D;
9import java.awt.Point;
10import java.awt.Rectangle;
11import java.awt.event.ComponentAdapter;
12import java.awt.event.ComponentEvent;
13import java.awt.event.KeyEvent;
14import java.awt.event.MouseAdapter;
15import java.awt.event.MouseEvent;
16import java.awt.event.MouseMotionListener;
17import java.awt.geom.Area;
18import java.awt.image.BufferedImage;
19import java.beans.PropertyChangeEvent;
20import java.beans.PropertyChangeListener;
21import java.util.ArrayList;
22import java.util.Arrays;
23import java.util.Collections;
24import java.util.HashMap;
25import java.util.IdentityHashMap;
26import java.util.LinkedHashSet;
27import java.util.List;
28import java.util.Set;
29import java.util.TreeSet;
30import java.util.concurrent.CopyOnWriteArrayList;
31import java.util.concurrent.atomic.AtomicBoolean;
32
33import javax.swing.AbstractButton;
34import javax.swing.JComponent;
35import javax.swing.JPanel;
36
37import org.openstreetmap.josm.Main;
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.ProjectionBounds;
43import org.openstreetmap.josm.data.SelectionChangedListener;
44import org.openstreetmap.josm.data.ViewportData;
45import org.openstreetmap.josm.data.coor.EastNorth;
46import org.openstreetmap.josm.data.imagery.ImageryInfo;
47import org.openstreetmap.josm.data.osm.DataSet;
48import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
49import org.openstreetmap.josm.data.osm.visitor.paint.Rendering;
50import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
51import org.openstreetmap.josm.gui.MapViewState.MapViewRectangle;
52import org.openstreetmap.josm.gui.datatransfer.OsmTransferHandler;
53import org.openstreetmap.josm.gui.layer.AbstractMapViewPaintable;
54import org.openstreetmap.josm.gui.layer.GpxLayer;
55import org.openstreetmap.josm.gui.layer.ImageryLayer;
56import org.openstreetmap.josm.gui.layer.Layer;
57import org.openstreetmap.josm.gui.layer.LayerManager;
58import org.openstreetmap.josm.gui.layer.LayerManager.LayerAddEvent;
59import org.openstreetmap.josm.gui.layer.LayerManager.LayerOrderChangeEvent;
60import org.openstreetmap.josm.gui.layer.LayerManager.LayerRemoveEvent;
61import org.openstreetmap.josm.gui.layer.MainLayerManager;
62import org.openstreetmap.josm.gui.layer.MainLayerManager.ActiveLayerChangeEvent;
63import org.openstreetmap.josm.gui.layer.MapViewGraphics;
64import org.openstreetmap.josm.gui.layer.MapViewPaintable;
65import org.openstreetmap.josm.gui.layer.MapViewPaintable.LayerPainter;
66import org.openstreetmap.josm.gui.layer.MapViewPaintable.MapViewEvent;
67import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationEvent;
68import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationListener;
69import org.openstreetmap.josm.gui.layer.OsmDataLayer;
70import org.openstreetmap.josm.gui.layer.geoimage.GeoImageLayer;
71import org.openstreetmap.josm.gui.layer.markerlayer.PlayHeadMarker;
72import org.openstreetmap.josm.tools.AudioPlayer;
73import org.openstreetmap.josm.tools.Shortcut;
74import org.openstreetmap.josm.tools.Utils;
75import org.openstreetmap.josm.tools.bugreport.BugReport;
76
77/**
78 * This is a component used in the {@link MapFrame} for browsing the map. It use is to
79 * provide the MapMode's enough capabilities to operate.<br><br>
80 *
81 * {@code MapView} holds meta-data about the data set currently displayed, as scale level,
82 * center point viewed, what scrolling mode or editing mode is selected or with
83 * what projection the map is viewed etc..<br><br>
84 *
85 * {@code MapView} is able to administrate several layers.
86 *
87 * @author imi
88 */
89public class MapView extends NavigatableComponent
90implements PropertyChangeListener, PreferenceChangedListener,
91LayerManager.LayerChangeListener, MainLayerManager.ActiveLayerChangeListener {
92
93 /**
94 * An invalidation listener that simply calls repaint() for now.
95 * @author Michael Zangl
96 * @since 10271
97 */
98 private class LayerInvalidatedListener implements PaintableInvalidationListener {
99 private boolean ignoreRepaint;
100
101 private final Set<MapViewPaintable> invalidatedLayers = Collections.newSetFromMap(new IdentityHashMap<MapViewPaintable, Boolean>());
102
103 @Override
104 public void paintableInvalidated(PaintableInvalidationEvent event) {
105 invalidate(event.getLayer());
106 }
107
108 /**
109 * Invalidate contents and repaint map view
110 * @param mapViewPaintable invalidated layer
111 */
112 public synchronized void invalidate(MapViewPaintable mapViewPaintable) {
113 ignoreRepaint = true;
114 invalidatedLayers.add(mapViewPaintable);
115 repaint();
116 }
117
118 /**
119 * Temporary until all {@link MapViewPaintable}s support this.
120 * @param p The paintable.
121 */
122 public synchronized void addTo(MapViewPaintable p) {
123 if (p instanceof AbstractMapViewPaintable) {
124 ((AbstractMapViewPaintable) p).addInvalidationListener(this);
125 }
126 }
127
128 /**
129 * Temporary until all {@link MapViewPaintable}s support this.
130 * @param p The paintable.
131 */
132 public synchronized void removeFrom(MapViewPaintable p) {
133 if (p instanceof AbstractMapViewPaintable) {
134 ((AbstractMapViewPaintable) p).removeInvalidationListener(this);
135 }
136 invalidatedLayers.remove(p);
137 }
138
139 /**
140 * Attempts to trace repaints that did not originate from this listener. Good to find missed {@link MapView#repaint()}s in code.
141 */
142 protected synchronized void traceRandomRepaint() {
143 if (!ignoreRepaint) {
144 System.err.println("Repaint:");
145 Thread.dumpStack();
146 }
147 ignoreRepaint = false;
148 }
149
150 /**
151 * Retrieves a set of all layers that have been marked as invalid since the last call to this method.
152 * @return The layers
153 */
154 protected synchronized Set<MapViewPaintable> collectInvalidatedLayers() {
155 Set<MapViewPaintable> layers = Collections.newSetFromMap(new IdentityHashMap<MapViewPaintable, Boolean>());
156 layers.addAll(invalidatedLayers);
157 invalidatedLayers.clear();
158 return layers;
159 }
160 }
161
162 /**
163 * A layer painter that issues a warning when being called.
164 * @author Michael Zangl
165 * @since 10474
166 */
167 private static class WarningLayerPainter implements LayerPainter {
168 boolean warningPrinted;
169 private final Layer layer;
170
171 WarningLayerPainter(Layer layer) {
172 this.layer = layer;
173 }
174
175 @Override
176 public void paint(MapViewGraphics graphics) {
177 if (!warningPrinted) {
178 Main.debug("A layer triggered a repaint while being added: " + layer);
179 warningPrinted = true;
180 }
181 }
182
183 @Override
184 public void detachFromMapView(MapViewEvent event) {
185 // ignored
186 }
187 }
188
189 public boolean viewportFollowing;
190
191 /**
192 * A list of all layers currently loaded. If we support multiple map views, this list may be different for each of them.
193 */
194 private final MainLayerManager layerManager;
195
196 /**
197 * The play head marker: there is only one of these so it isn't in any specific layer
198 */
199 public transient PlayHeadMarker playHeadMarker;
200
201 /**
202 * The last event performed by mouse.
203 */
204 public MouseEvent lastMEvent = new MouseEvent(this, 0, 0, 0, 0, 0, 0, false); // In case somebody reads it before first mouse move
205
206 /**
207 * Temporary layers (selection rectangle, etc.) that are never cached and
208 * drawn on top of regular layers.
209 * Access must be synchronized.
210 */
211 private final transient Set<MapViewPaintable> temporaryLayers = new LinkedHashSet<>();
212
213 private transient BufferedImage nonChangedLayersBuffer;
214 private transient BufferedImage offscreenBuffer;
215 // Layers that wasn't changed since last paint
216 private final transient List<Layer> nonChangedLayers = new ArrayList<>();
217 private int lastViewID;
218 private final AtomicBoolean paintPreferencesChanged = new AtomicBoolean(true);
219 private Rectangle lastClipBounds = new Rectangle();
220 private transient MapMover mapMover;
221
222 /**
223 * The listener that listens to invalidations of all layers.
224 */
225 private final LayerInvalidatedListener invalidatedListener = new LayerInvalidatedListener();
226
227 /**
228 * This is a map of all Layers that have been added to this view.
229 */
230 private final HashMap<Layer, LayerPainter> registeredLayers = new HashMap<>();
231
232 /**
233 * Constructs a new {@code MapView}.
234 * @param layerManager The layers to display.
235 * @param contentPane Ignored. Main content pane is used.
236 * @param viewportData the initial viewport of the map. Can be null, then
237 * the viewport is derived from the layer data.
238 * @since 10279
239 */
240 public MapView(MainLayerManager layerManager, final JPanel contentPane, final ViewportData viewportData) {
241 this.layerManager = layerManager;
242 initialViewport = viewportData;
243 layerManager.addLayerChangeListener(this, true);
244 layerManager.addActiveLayerChangeListener(this);
245 Main.pref.addPreferenceChangeListener(this);
246
247 addComponentListener(new ComponentAdapter() {
248 @Override
249 public void componentResized(ComponentEvent e) {
250 removeComponentListener(this);
251
252 mapMover = new MapMover(MapView.this, contentPane);
253 }
254 });
255
256 // listend to selection changes to redraw the map
257 DataSet.addSelectionListener(repaintSelectionChangedListener);
258
259 //store the last mouse action
260 this.addMouseMotionListener(new MouseMotionListener() {
261 @Override
262 public void mouseDragged(MouseEvent e) {
263 mouseMoved(e);
264 }
265
266 @Override
267 public void mouseMoved(MouseEvent e) {
268 lastMEvent = e;
269 }
270 });
271 this.addMouseListener(new MouseAdapter() {
272 @Override
273 public void mousePressed(MouseEvent me) {
274 // focus the MapView component when mouse is pressed inside it
275 requestFocus();
276 }
277 });
278
279 setFocusTraversalKeysEnabled(!Shortcut.findShortcut(KeyEvent.VK_TAB, 0).isPresent());
280
281 for (JComponent c : getMapNavigationComponents(this)) {
282 add(c);
283 }
284 setTransferHandler(new OsmTransferHandler());
285 }
286
287 /**
288 * Adds the map navigation components to a
289 * @param forMapView The map view to get the components for.
290 * @return A list containing the correctly positioned map navigation components.
291 */
292 public static List<? extends JComponent> getMapNavigationComponents(MapView forMapView) {
293 MapSlider zoomSlider = new MapSlider(forMapView);
294 Dimension size = zoomSlider.getPreferredSize();
295 zoomSlider.setSize(size);
296 zoomSlider.setLocation(3, 0);
297 zoomSlider.setFocusTraversalKeysEnabled(!Shortcut.findShortcut(KeyEvent.VK_TAB, 0).isPresent());
298
299 MapScaler scaler = new MapScaler(forMapView);
300 scaler.setPreferredLineLength(size.width - 10);
301 scaler.setSize(scaler.getPreferredSize());
302 scaler.setLocation(3, size.height);
303
304 return Arrays.asList(zoomSlider, scaler);
305 }
306
307 // remebered geometry of the component
308 private Dimension oldSize;
309 private Point oldLoc;
310
311 /**
312 * Call this method to keep map position on screen during next repaint
313 */
314 public void rememberLastPositionOnScreen() {
315 oldSize = getSize();
316 oldLoc = getLocationOnScreen();
317 }
318
319 @Override
320 public void layerAdded(LayerAddEvent e) {
321 try {
322 Layer layer = e.getAddedLayer();
323 registeredLayers.put(layer, new WarningLayerPainter(layer));
324 // Layers may trigger a redraw during this call if they open dialogs.
325 LayerPainter painter = layer.attachToMapView(new MapViewEvent(this, false));
326 if (!registeredLayers.containsKey(layer)) {
327 // The layer may have removed itself during attachToMapView()
328 Main.warn("Layer was removed during attachToMapView()");
329 } else {
330 registeredLayers.put(layer, painter);
331
332 ProjectionBounds viewProjectionBounds = layer.getViewProjectionBounds();
333 if (viewProjectionBounds != null) {
334 scheduleZoomTo(new ViewportData(viewProjectionBounds));
335 }
336
337 layer.addPropertyChangeListener(this);
338 Main.addProjectionChangeListener(layer);
339 invalidatedListener.addTo(layer);
340 AudioPlayer.reset();
341
342 repaint();
343 }
344 } catch (RuntimeException t) {
345 throw BugReport.intercept(t).put("layer", e.getAddedLayer());
346 }
347 }
348
349 /**
350 * Replies true if the active data layer (edit layer) is drawable.
351 *
352 * @return true if the active data layer (edit layer) is drawable, false otherwise
353 */
354 public boolean isActiveLayerDrawable() {
355 return layerManager.getEditLayer() != null;
356 }
357
358 /**
359 * Replies true if the active data layer (edit layer) is visible.
360 *
361 * @return true if the active data layer (edit layer) is visible, false otherwise
362 */
363 public boolean isActiveLayerVisible() {
364 OsmDataLayer e = layerManager.getEditLayer();
365 return e != null && e.isVisible();
366 }
367
368 @Override
369 public void layerRemoving(LayerRemoveEvent e) {
370 Layer layer = e.getRemovedLayer();
371
372 LayerPainter painter = registeredLayers.remove(layer);
373 if (painter == null) {
374 Main.error("The painter for layer " + layer + " was not registered.");
375 return;
376 }
377 painter.detachFromMapView(new MapViewEvent(this, false));
378 Main.removeProjectionChangeListener(layer);
379 layer.removePropertyChangeListener(this);
380 invalidatedListener.removeFrom(layer);
381 layer.destroy();
382 AudioPlayer.reset();
383
384 repaint();
385 }
386
387 private boolean virtualNodesEnabled;
388
389 public void setVirtualNodesEnabled(boolean enabled) {
390 if (virtualNodesEnabled != enabled) {
391 virtualNodesEnabled = enabled;
392 repaint();
393 }
394 }
395
396 /**
397 * Checks if virtual nodes should be drawn. Default is <code>false</code>
398 * @return The virtual nodes property.
399 * @see Rendering#render(DataSet, boolean, Bounds)
400 */
401 public boolean isVirtualNodesEnabled() {
402 return virtualNodesEnabled;
403 }
404
405 /**
406 * Moves the layer to the given new position. No event is fired, but repaints
407 * according to the new Z-Order of the layers.
408 *
409 * @param layer The layer to move
410 * @param pos The new position of the layer
411 */
412 public void moveLayer(Layer layer, int pos) {
413 layerManager.moveLayer(layer, pos);
414 }
415
416 @Override
417 public void layerOrderChanged(LayerOrderChangeEvent e) {
418 AudioPlayer.reset();
419 repaint();
420 }
421
422 /**
423 * Paints the given layer to the graphics object, using the current state of this map view.
424 * @param layer The layer to draw.
425 * @param g A graphics object. It should have the width and height of this component
426 * @throws IllegalArgumentException If the layer is not part of this map view.
427 * @since 11226
428 */
429 public void paintLayer(Layer layer, Graphics2D g) {
430 try {
431 LayerPainter painter = registeredLayers.get(layer);
432 if (painter == null) {
433 throw new IllegalArgumentException("Cannot paint layer, it is not registered.");
434 }
435 MapViewRectangle clipBounds = getState().getViewArea(g.getClipBounds());
436 MapViewGraphics paintGraphics = new MapViewGraphics(this, g, clipBounds);
437
438 if (layer.getOpacity() < 1) {
439 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, (float) layer.getOpacity()));
440 }
441 painter.paint(paintGraphics);
442 g.setPaintMode();
443 } catch (RuntimeException t) {
444 BugReport.intercept(t).put("layer", layer).warn();
445 }
446 }
447
448 /**
449 * Draw the component.
450 */
451 @Override
452 public void paint(Graphics g) {
453 try {
454 if (!prepareToDraw()) {
455 return;
456 }
457 } catch (RuntimeException e) {
458 BugReport.intercept(e).put("center", this::getCenter).warn();
459 return;
460 }
461
462 List<Layer> visibleLayers = layerManager.getVisibleLayersInZOrder();
463
464 int nonChangedLayersCount = 0;
465 Set<MapViewPaintable> invalidated = invalidatedListener.collectInvalidatedLayers();
466 for (Layer l: visibleLayers) {
467 // `isChanged` for backward compatibility, see https://josm.openstreetmap.de/ticket/13175#comment:7
468 // Layers that still implement it (plugins) will use it to tell the MapView that they have been changed.
469 // This is why the MapView still uses it in addition to the invalidation events.
470 if (l.isChanged() || invalidated.contains(l)) {
471 break;
472 } else {
473 nonChangedLayersCount++;
474 }
475 }
476
477 boolean canUseBuffer = !paintPreferencesChanged.getAndSet(false)
478 && nonChangedLayers.size() <= nonChangedLayersCount
479 && lastViewID == getViewID()
480 && lastClipBounds.contains(g.getClipBounds())
481 && nonChangedLayers.equals(visibleLayers.subList(0, nonChangedLayers.size()));
482
483 if (null == offscreenBuffer || offscreenBuffer.getWidth() != getWidth() || offscreenBuffer.getHeight() != getHeight()) {
484 offscreenBuffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_3BYTE_BGR);
485 }
486
487 Graphics2D tempG = offscreenBuffer.createGraphics();
488 tempG.setClip(g.getClip());
489
490 if (!canUseBuffer || nonChangedLayersBuffer == null) {
491 if (null == nonChangedLayersBuffer
492 || nonChangedLayersBuffer.getWidth() != getWidth() || nonChangedLayersBuffer.getHeight() != getHeight()) {
493 nonChangedLayersBuffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_3BYTE_BGR);
494 }
495 Graphics2D g2 = nonChangedLayersBuffer.createGraphics();
496 g2.setClip(g.getClip());
497 g2.setColor(PaintColors.getBackgroundColor());
498 g2.fillRect(0, 0, getWidth(), getHeight());
499
500 for (int i = 0; i < nonChangedLayersCount; i++) {
501 paintLayer(visibleLayers.get(i), g2);
502 }
503 } else {
504 // Maybe there were more unchanged layers then last time - draw them to buffer
505 if (nonChangedLayers.size() != nonChangedLayersCount) {
506 Graphics2D g2 = nonChangedLayersBuffer.createGraphics();
507 g2.setClip(g.getClip());
508 for (int i = nonChangedLayers.size(); i < nonChangedLayersCount; i++) {
509 paintLayer(visibleLayers.get(i), g2);
510 }
511 }
512 }
513
514 nonChangedLayers.clear();
515 nonChangedLayers.addAll(visibleLayers.subList(0, nonChangedLayersCount));
516 lastViewID = getViewID();
517 lastClipBounds = g.getClipBounds();
518
519 tempG.drawImage(nonChangedLayersBuffer, 0, 0, null);
520
521 for (int i = nonChangedLayersCount; i < visibleLayers.size(); i++) {
522 paintLayer(visibleLayers.get(i), tempG);
523 }
524
525 try {
526 drawTemporaryLayers(tempG, getLatLonBounds(g.getClipBounds()));
527 } catch (RuntimeException e) {
528 BugReport.intercept(e).put("temporaryLayers", temporaryLayers).warn();
529 }
530
531 // draw world borders
532 try {
533 drawWorldBorders(tempG);
534 } catch (RuntimeException e) {
535 // getProjection() needs to be inside lambda to catch errors.
536 BugReport.intercept(e).put("bounds", () -> getProjection().getWorldBoundsLatLon()).warn();
537 }
538
539 if (Main.isDisplayingMapView() && Main.map.filterDialog != null) {
540 Main.map.filterDialog.drawOSDText(tempG);
541 }
542
543 if (playHeadMarker != null) {
544 playHeadMarker.paint(tempG, this);
545 }
546
547 try {
548 g.drawImage(offscreenBuffer, 0, 0, null);
549 } catch (ClassCastException e) {
550 // See #11002 and duplicate tickets. On Linux with Java >= 8 Many users face this error here:
551 //
552 // java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
553 // at sun.java2d.xr.XRPMBlitLoops.cacheToTmpSurface(XRPMBlitLoops.java:145)
554 // at sun.java2d.xr.XrSwToPMBlit.Blit(XRPMBlitLoops.java:353)
555 // at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:959)
556 // at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:577)
557 // at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:67)
558 // at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1014)
559 // at sun.java2d.pipe.ValidatePipe.copyImage(ValidatePipe.java:186)
560 // at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318)
561 // at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296)
562 // at org.openstreetmap.josm.gui.MapView.paint(MapView.java:834)
563 //
564 // It seems to be this JDK bug, but Oracle does not seem to be fixing it:
565 // https://bugs.openjdk.java.net/browse/JDK-7172749
566 //
567 // According to bug reports it can happen for a variety of reasons such as:
568 // - long period of time
569 // - change of screen resolution
570 // - addition/removal of a secondary monitor
571 //
572 // But the application seems to work fine after, so let's just log the error
573 Main.error(e);
574 }
575 super.paint(g);
576 }
577
578 private void drawTemporaryLayers(Graphics2D tempG, Bounds box) {
579 synchronized (temporaryLayers) {
580 for (MapViewPaintable mvp : temporaryLayers) {
581 try {
582 mvp.paint(tempG, this, box);
583 } catch (RuntimeException e) {
584 throw BugReport.intercept(e).put("mvp", mvp);
585 }
586 }
587 }
588 }
589
590 private void drawWorldBorders(Graphics2D tempG) {
591 tempG.setColor(Color.WHITE);
592 Bounds b = getProjection().getWorldBoundsLatLon();
593
594 int w = getWidth();
595 int h = getHeight();
596
597 // Work around OpenJDK having problems when drawing out of bounds
598 final Area border = getState().getArea(b);
599 // Make the viewport 1px larger in every direction to prevent an
600 // additional 1px border when zooming in
601 final Area viewport = new Area(new Rectangle(-1, -1, w + 2, h + 2));
602 border.intersect(viewport);
603 tempG.draw(border);
604 }
605
606 /**
607 * Sets up the viewport to prepare for drawing the view.
608 * @return <code>true</code> if the view can be drawn, <code>false</code> otherwise.
609 */
610 public boolean prepareToDraw() {
611 updateLocationState();
612 if (initialViewport != null) {
613 zoomTo(initialViewport);
614 initialViewport = null;
615 }
616
617 if (getCenter() == null)
618 return false; // no data loaded yet.
619
620 // if the position was remembered, we need to adjust center once before repainting
621 if (oldLoc != null && oldSize != null) {
622 Point l1 = getLocationOnScreen();
623 final EastNorth newCenter = new EastNorth(
624 getCenter().getX()+ (l1.x-oldLoc.x - (oldSize.width-getWidth())/2.0)*getScale(),
625 getCenter().getY()+ (oldLoc.y-l1.y + (oldSize.height-getHeight())/2.0)*getScale()
626 );
627 oldLoc = null; oldSize = null;
628 zoomTo(newCenter);
629 }
630
631 return true;
632 }
633
634 @Override
635 public void activeOrEditLayerChanged(ActiveLayerChangeEvent e) {
636 if (Main.map != null) {
637 /* This only makes the buttons look disabled. Disabling the actions as well requires
638 * the user to re-select the tool after i.e. moving a layer. While testing I found
639 * that I switch layers and actions at the same time and it was annoying to mind the
640 * order. This way it works as visual clue for new users */
641 // FIXME: This does not belong here.
642 for (final AbstractButton b: Main.map.allMapModeButtons) {
643 MapMode mode = (MapMode) b.getAction();
644 final boolean activeLayerSupported = mode.layerIsSupported(layerManager.getActiveLayer());
645 if (activeLayerSupported) {
646 Main.registerActionShortcut(mode, mode.getShortcut()); //fix #6876
647 } else {
648 Main.unregisterShortcut(mode.getShortcut());
649 }
650 b.setEnabled(activeLayerSupported);
651 }
652 }
653 AudioPlayer.reset();
654 repaint();
655 }
656
657 /**
658 * Adds a new temporary layer.
659 * <p>
660 * A temporary layer is a layer that is painted above all normal layers. Layers are painted in the order they are added.
661 *
662 * @param mvp The layer to paint.
663 * @return <code>true</code> if the layer was added.
664 */
665 public boolean addTemporaryLayer(MapViewPaintable mvp) {
666 synchronized (temporaryLayers) {
667 boolean added = temporaryLayers.add(mvp);
668 if (added) {
669 invalidatedListener.addTo(mvp);
670 }
671 return added;
672 }
673 }
674
675 /**
676 * Removes a layer previously added as temporary layer.
677 * @param mvp The layer to remove.
678 * @return <code>true</code> if that layer was removed.
679 */
680 public boolean removeTemporaryLayer(MapViewPaintable mvp) {
681 synchronized (temporaryLayers) {
682 boolean removed = temporaryLayers.remove(mvp);
683 if (removed) {
684 invalidatedListener.removeFrom(mvp);
685 }
686 return removed;
687 }
688 }
689
690 /**
691 * Gets a list of temporary layers.
692 * @return The layers in the order they are added.
693 */
694 public List<MapViewPaintable> getTemporaryLayers() {
695 synchronized (temporaryLayers) {
696 return Collections.unmodifiableList(new ArrayList<>(temporaryLayers));
697 }
698 }
699
700 @Override
701 public void propertyChange(PropertyChangeEvent evt) {
702 if (evt.getPropertyName().equals(Layer.VISIBLE_PROP)) {
703 repaint();
704 } else if (evt.getPropertyName().equals(Layer.OPACITY_PROP) ||
705 evt.getPropertyName().equals(Layer.FILTER_STATE_PROP)) {
706 Layer l = (Layer) evt.getSource();
707 if (l.isVisible()) {
708 invalidatedListener.invalidate(l);
709 }
710 }
711 }
712
713 @Override
714 public void preferenceChanged(PreferenceChangeEvent e) {
715 paintPreferencesChanged.set(true);
716 }
717
718 private final transient SelectionChangedListener repaintSelectionChangedListener = newSelection -> repaint();
719
720 /**
721 * Destroy this map view panel. Should be called once when it is not needed any more.
722 */
723 public void destroy() {
724 layerManager.removeLayerChangeListener(this, true);
725 layerManager.removeActiveLayerChangeListener(this);
726 Main.pref.removePreferenceChangeListener(this);
727 DataSet.removeSelectionListener(repaintSelectionChangedListener);
728 MultipolygonCache.getInstance().clear(this);
729 if (mapMover != null) {
730 mapMover.destroy();
731 }
732 nonChangedLayers.clear();
733 synchronized (temporaryLayers) {
734 temporaryLayers.clear();
735 }
736 nonChangedLayersBuffer = null;
737 offscreenBuffer = null;
738 }
739
740 /**
741 * Get a string representation of all layers suitable for the {@code source} changeset tag.
742 * @return A String of sources separated by ';'
743 */
744 public String getLayerInformationForSourceTag() {
745 final Set<String> layerInfo = new TreeSet<>();
746 if (!layerManager.getLayersOfType(GpxLayer.class).isEmpty()) {
747 // no i18n for international values
748 layerInfo.add("survey");
749 }
750 for (final GeoImageLayer i : layerManager.getLayersOfType(GeoImageLayer.class)) {
751 if (i.isVisible()) {
752 layerInfo.add(i.getName());
753 }
754 }
755 for (final ImageryLayer i : layerManager.getLayersOfType(ImageryLayer.class)) {
756 if (i.isVisible()) {
757 layerInfo.add(ImageryInfo.ImageryType.BING.equals(i.getInfo().getImageryType()) ? "Bing" : i.getName());
758 }
759 }
760 return Utils.join("; ", layerInfo);
761 }
762
763 /**
764 * This is a listener that gets informed whenever repaint is called for this MapView.
765 * <p>
766 * This is the only safe method to find changes to the map view, since many components call MapView.repaint() directly.
767 * @author Michael Zangl
768 * @since 10600 (functional interface)
769 */
770 @FunctionalInterface
771 public interface RepaintListener {
772 /**
773 * Called when any repaint method is called (using default arguments if required).
774 * @param tm see {@link JComponent#repaint(long, int, int, int, int)}
775 * @param x see {@link JComponent#repaint(long, int, int, int, int)}
776 * @param y see {@link JComponent#repaint(long, int, int, int, int)}
777 * @param width see {@link JComponent#repaint(long, int, int, int, int)}
778 * @param height see {@link JComponent#repaint(long, int, int, int, int)}
779 */
780 void repaint(long tm, int x, int y, int width, int height);
781 }
782
783 private final transient CopyOnWriteArrayList<RepaintListener> repaintListeners = new CopyOnWriteArrayList<>();
784
785 /**
786 * Adds a listener that gets informed whenever repaint() is called for this class.
787 * @param l The listener.
788 */
789 public void addRepaintListener(RepaintListener l) {
790 repaintListeners.add(l);
791 }
792
793 /**
794 * Removes a registered repaint listener.
795 * @param l The listener.
796 */
797 public void removeRepaintListener(RepaintListener l) {
798 repaintListeners.remove(l);
799 }
800
801 @Override
802 public void repaint(long tm, int x, int y, int width, int height) {
803 // This is the main repaint method, all other methods are convenience methods and simply call this method.
804 // This is just an observation, not a must, but seems to be true for all implementations I found so far.
805 if (repaintListeners != null) {
806 // Might get called early in super constructor
807 for (RepaintListener l : repaintListeners) {
808 l.repaint(tm, x, y, width, height);
809 }
810 }
811 super.repaint(tm, x, y, width, height);
812 }
813
814 @Override
815 public void repaint() {
816 if (Main.isTraceEnabled()) {
817 invalidatedListener.traceRandomRepaint();
818 }
819 super.repaint();
820 }
821
822 /**
823 * Returns the layer manager.
824 * @return the layer manager
825 * @since 10282
826 */
827 public final MainLayerManager getLayerManager() {
828 return layerManager;
829 }
830
831 /**
832 * Schedule a zoom to the given position on the next redraw.
833 * Temporary, may be removed without warning.
834 * @param viewportData the viewport to zoom to
835 * @since 10394
836 */
837 public void scheduleZoomTo(ViewportData viewportData) {
838 initialViewport = viewportData;
839 }
840}
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