source: josm/trunk/src/org/openstreetmap/josm/gui/MapView.java@ 1823

Last change on this file since 1823 was 1823, checked in by stoecker, 15 years ago

some projection and zoom cleanups - projection classes still need better handling of outside-world coordinates
  • Property svn:eol-style set to native
File size: 16.0 KB
Line 
1// License: GPL. See LICENSE file for details.
2
3package org.openstreetmap.josm.gui;
4
5import static org.openstreetmap.josm.tools.I18n.tr;
6
7import java.awt.Color;
8import java.awt.Graphics;
9import java.awt.Graphics2D;
10import java.awt.Point;
11import java.awt.event.ComponentAdapter;
12import java.awt.event.ComponentEvent;
13import java.awt.event.MouseEvent;
14import java.awt.event.MouseMotionListener;
15import java.awt.geom.GeneralPath;
16import java.awt.image.BufferedImage;
17import java.util.ArrayList;
18import java.util.Collection;
19import java.util.Collections;
20import java.util.Enumeration;
21import java.util.LinkedList;
22
23import javax.swing.AbstractButton;
24import javax.swing.JComponent;
25import javax.swing.JOptionPane;
26
27import org.openstreetmap.josm.Main;
28import org.openstreetmap.josm.actions.AutoScaleAction;
29import org.openstreetmap.josm.actions.JosmAction;
30import org.openstreetmap.josm.actions.MoveAction;
31import org.openstreetmap.josm.actions.mapmode.MapMode;
32import org.openstreetmap.josm.data.Bounds;
33import org.openstreetmap.josm.data.ProjectionBounds;
34import org.openstreetmap.josm.data.SelectionChangedListener;
35import org.openstreetmap.josm.data.osm.DataSet;
36import org.openstreetmap.josm.data.osm.DataSource;
37import org.openstreetmap.josm.data.osm.OsmPrimitive;
38import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
39import org.openstreetmap.josm.data.coor.LatLon;
40import org.openstreetmap.josm.gui.layer.Layer;
41import org.openstreetmap.josm.gui.layer.MapViewPaintable;
42import org.openstreetmap.josm.gui.layer.OsmDataLayer;
43import org.openstreetmap.josm.gui.layer.OsmDataLayer.ModifiedChangedListener;
44import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
45import org.openstreetmap.josm.gui.layer.markerlayer.PlayHeadMarker;
46import org.openstreetmap.josm.tools.AudioPlayer;
47
48/**
49 * This is a component used in the MapFrame for browsing the map. It use is to
50 * provide the MapMode's enough capabilities to operate.
51 *
52 * MapView hold meta-data about the data set currently displayed, as scale level,
53 * center point viewed, what scrolling mode or editing mode is selected or with
54 * what projection the map is viewed etc..
55 *
56 * MapView is able to administrate several layers.
57 *
58 * @author imi
59 */
60public class MapView extends NavigatableComponent {
61
62
63 /**
64 * A list of all layers currently loaded.
65 */
66 private ArrayList<Layer> layers = new ArrayList<Layer>();
67 /**
68 * The play head marker: there is only one of these so it isn't in any specific layer
69 */
70 public PlayHeadMarker playHeadMarker = null;
71
72 /**
73 * The layer from the layers list that is currently active.
74 */
75 private Layer activeLayer;
76
77 /**
78 * The last event performed by mouse.
79 */
80 public MouseEvent lastMEvent;
81
82 private LinkedList<MapViewPaintable> temporaryLayers = new LinkedList<MapViewPaintable>();
83
84 private BufferedImage offscreenBuffer;
85
86 public MapView() {
87 addComponentListener(new ComponentAdapter(){
88 @Override public void componentResized(ComponentEvent e) {
89 removeComponentListener(this);
90
91 MapSlider zoomSlider = new MapSlider(MapView.this);
92 add(zoomSlider);
93 zoomSlider.setBounds(3, 0, 114, 30);
94
95 MapScaler scaler = new MapScaler(MapView.this);
96 add(scaler);
97 scaler.setLocation(10,30);
98
99 if (!zoomToEditLayerBoundingBox()) {
100 new AutoScaleAction("data").actionPerformed(null);
101 }
102
103 new MapMover(MapView.this, Main.contentPane);
104 JosmAction mv;
105 mv = new MoveAction(MoveAction.Direction.UP);
106 if (mv.getShortcut() != null) {
107 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "UP");
108 Main.contentPane.getActionMap().put("UP", mv);
109 }
110 mv = new MoveAction(MoveAction.Direction.DOWN);
111 if (mv.getShortcut() != null) {
112 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "DOWN");
113 Main.contentPane.getActionMap().put("DOWN", mv);
114 }
115 mv = new MoveAction(MoveAction.Direction.LEFT);
116 if (mv.getShortcut() != null) {
117 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "LEFT");
118 Main.contentPane.getActionMap().put("LEFT", mv);
119 }
120 mv = new MoveAction(MoveAction.Direction.RIGHT);
121 if (mv.getShortcut() != null) {
122 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "RIGHT");
123 Main.contentPane.getActionMap().put("RIGHT", mv);
124 }
125 }
126 });
127
128 // listend to selection changes to redraw the map
129 DataSet.selListeners.add(new SelectionChangedListener(){
130 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
131 repaint();
132 }
133 });
134
135 //store the last mouse action
136 this.addMouseMotionListener(new MouseMotionListener() {
137 public void mouseDragged(MouseEvent e) {
138 mouseMoved(e);
139 }
140 public void mouseMoved(MouseEvent e) {
141 lastMEvent = e;
142 }
143 });
144 }
145
146 /**
147 * Add a layer to the current MapView. The layer will be added at topmost
148 * position.
149 */
150 public void addLayer(Layer layer) {
151 if (layer instanceof OsmDataLayer) {
152 OsmDataLayer editLayer = (OsmDataLayer)layer;
153 editLayer.listenerModified.add(new ModifiedChangedListener(){
154 public void modifiedChanged(boolean value, OsmDataLayer source) {
155 JOptionPane.getFrameForComponent(Main.parent).setTitle((value?"*":"")
156 +tr("Java OpenStreetMap Editor"));
157 }
158 });
159 }
160 if (layer instanceof MarkerLayer && playHeadMarker == null) {
161 playHeadMarker = PlayHeadMarker.create();
162 }
163 int pos = layers.size();
164 while(pos > 0 && layers.get(pos-1).background) {
165 --pos;
166 }
167 layers.add(pos, layer);
168
169 for (Layer.LayerChangeListener l : Layer.listeners) {
170 l.layerAdded(layer);
171 }
172 if (layer instanceof OsmDataLayer || activeLayer == null) {
173 // autoselect the new layer
174 Layer old = activeLayer;
175 setActiveLayer(layer);
176 for (Layer.LayerChangeListener l : Layer.listeners) {
177 l.activeLayerChange(old, layer);
178 }
179 }
180 AudioPlayer.reset();
181 repaint();
182 }
183
184 @Override
185 protected DataSet getCurrentDataSet() {
186 if(activeLayer != null && activeLayer instanceof OsmDataLayer)
187 return ((OsmDataLayer)activeLayer).data;
188 return null;
189 }
190
191 /**
192 * Replies true if the active layer is drawable.
193 *
194 * @return true if the active layer is drawable, false otherwise
195 */
196 public boolean isActiveLayerDrawable() {
197 return activeLayer != null && activeLayer instanceof OsmDataLayer;
198 }
199
200 /**
201 * Replies true if the active layer is visible.
202 *
203 * @return true if the active layer is visible, false otherwise
204 */
205 public boolean isActiveLayerVisible() {
206 return isActiveLayerDrawable() && activeLayer.visible;
207 }
208
209 /**
210 * Remove the layer from the mapview. If the layer was in the list before,
211 * an LayerChange event is fired.
212 */
213 public void removeLayer(Layer layer) {
214 if (layer == activeLayer) {
215 activeLayer = null;
216 }
217 if (layers.remove(layer)) {
218 for (Layer.LayerChangeListener l : Layer.listeners) {
219 l.layerRemoved(layer);
220 }
221 }
222 layer.destroy();
223 AudioPlayer.reset();
224 }
225
226 private boolean virtualNodesEnabled = false;
227 public void setVirtualNodesEnabled(boolean enabled) {
228 if(virtualNodesEnabled != enabled) {
229 virtualNodesEnabled = enabled;
230 repaint();
231 }
232 }
233 public boolean isVirtualNodesEnabled() {
234 return virtualNodesEnabled;
235 }
236
237 /**
238 * Moves the layer to the given new position. No event is fired.
239 * @param layer The layer to move
240 * @param pos The new position of the layer
241 */
242 public void moveLayer(Layer layer, int pos) {
243 int curLayerPos = layers.indexOf(layer);
244 if (curLayerPos == -1)
245 throw new IllegalArgumentException(tr("layer not in list."));
246 if (pos == curLayerPos)
247 return; // already in place.
248 layers.remove(curLayerPos);
249 if (pos >= layers.size()) {
250 layers.add(layer);
251 } else {
252 layers.add(pos, layer);
253 }
254 AudioPlayer.reset();
255 }
256
257
258 public int getLayerPos(Layer layer) {
259 int curLayerPos = layers.indexOf(layer);
260 if (curLayerPos == -1)
261 throw new IllegalArgumentException(tr("layer not in list."));
262 return curLayerPos;
263 }
264
265 /**
266 * Draw the component.
267 */
268 @Override public void paint(Graphics g) {
269 if (center == null)
270 return; // no data loaded yet.
271
272 // re-create offscreen-buffer if we've been resized, otherwise
273 // just re-use it.
274 if (null == offscreenBuffer || offscreenBuffer.getWidth() != getWidth()
275 || offscreenBuffer.getHeight() != getHeight()) {
276 offscreenBuffer = new BufferedImage(getWidth(), getHeight(),
277 BufferedImage.TYPE_INT_ARGB);
278 }
279
280 Graphics2D tempG = offscreenBuffer.createGraphics();
281 tempG.setColor(Main.pref.getColor("background", Color.BLACK));
282 tempG.fillRect(0, 0, getWidth(), getHeight());
283
284 for (int i = layers.size()-1; i >= 0; --i) {
285 Layer l = layers.get(i);
286 if (l.visible/* && l != getActiveLayer()*/) {
287 l.paint(tempG, this);
288 }
289 }
290
291 /*if (getActiveLayer() != null && getActiveLayer().visible)
292 getActiveLayer().paint(tempG, this);*/
293
294 for (MapViewPaintable mvp : temporaryLayers) {
295 mvp.paint(tempG, this);
296 }
297
298 // draw world borders
299 tempG.setColor(Color.WHITE);
300 GeneralPath path = new GeneralPath();
301 Bounds b = getProjection().getWorldBoundsLatLon();
302 double lat = b.min.lat();
303 double lon = b.min.lon();
304
305 Point p = getPoint(b.min);
306 path.moveTo(p.x, p.y);
307
308 double max = b.max.lat();
309 for(; lat <= max; lat += 1.0)
310 {
311 p = getPoint(new LatLon(lat >= max ? max : lat, lon));
312 path.lineTo(p.x, p.y);
313 }
314 lat = max; max = b.max.lon();
315 for(; lon <= max; lon += 1.0)
316 {
317 p = getPoint(new LatLon(lat, lon >= max ? max : lon));
318 path.lineTo(p.x, p.y);
319 }
320 lon = max; max = b.min.lat();
321 for(; lat >= max; lat -= 1.0)
322 {
323 p = getPoint(new LatLon(lat <= max ? max : lat, lon));
324 path.lineTo(p.x, p.y);
325 }
326 lat = max; max = b.min.lon();
327 for(; lon >= max; lon -= 1.0)
328 {
329 p = getPoint(new LatLon(lat, lon <= max ? max : lon));
330 path.lineTo(p.x, p.y);
331 }
332
333 if (playHeadMarker != null) {
334 playHeadMarker.paint(tempG, this);
335 }
336 tempG.draw(path);
337
338 g.drawImage(offscreenBuffer, 0, 0, null);
339 super.paint(g);
340 }
341
342 /**
343 * Set the new dimension to the view.
344 */
345 public void recalculateCenterScale(BoundingXYVisitor box) {
346 if (box == null) {
347 box = new BoundingXYVisitor();
348 }
349 if (box.getBounds() == null) {
350 box.visit(getProjection().getWorldBoundsLatLon());
351 }
352 if (!box.hasExtend()) {
353 box.enlargeBoundingBox();
354 }
355
356 zoomTo(box.getBounds());
357 }
358
359 /**
360 * @return An unmodifiable collection of all layers
361 */
362 public Collection<Layer> getAllLayers() {
363 return Collections.unmodifiableCollection(layers);
364 }
365
366 /**
367 * Sets the active layer to <code>layer</code>. If <code>layer</code> is an instance
368 * of {@see OsmDataLayer} also sets {@see #editLayer} to <code>layer</code>.
369 *
370 * @param layer the layer to be activate; must be one of the layers in the list of layers
371 * @exception IllegalArgumentException thrown if layer is not in the lis of layers
372 */
373 public void setActiveLayer(Layer layer) {
374 if (!layers.contains(layer))
375 throw new IllegalArgumentException(tr("Layer ''{0}'' must be in list of layers", layer.toString()));
376 if (! (layer instanceof OsmDataLayer)) {
377 if (getCurrentDataSet() != null) {
378 getCurrentDataSet().setSelected();
379 DataSet.fireSelectionChanged(getCurrentDataSet().getSelected());
380 }
381 }
382 Layer old = activeLayer;
383 activeLayer = layer;
384 if (old != layer) {
385 for (Layer.LayerChangeListener l : Layer.listeners) {
386 l.activeLayerChange(old, layer);
387 }
388 }
389
390 /* This only makes the buttons look disabled. Disabling the actions as well requires
391 * the user to re-select the tool after i.e. moving a layer. While testing I found
392 * that I switch layers and actions at the same time and it was annoying to mind the
393 * order. This way it works as visual clue for new users */
394 for (Enumeration<AbstractButton> e = Main.map.toolGroup.getElements() ; e.hasMoreElements() ;) {
395 AbstractButton x=e.nextElement();
396 x.setEnabled(((MapMode)x.getAction()).layerIsSupported(layer));
397 }
398 AudioPlayer.reset();
399 repaint();
400 }
401
402 /**
403 * Replies the currently active layer
404 *
405 * @return the currently active layer (may be null)
406 */
407 public Layer getActiveLayer() {
408 return activeLayer;
409 }
410
411 /**
412 * Replies the current edit layer, if any
413 *
414 * @return the current edit layer. May be null.
415 */
416 public OsmDataLayer getEditLayer() {
417 if (activeLayer instanceof OsmDataLayer)
418 return (OsmDataLayer)activeLayer;
419 return null;
420 }
421
422 /**
423 * replies true if the list of layers managed by this map view contain layer
424 *
425 * @param layer the layer
426 * @return true if the list of layers managed by this map view contain layer
427 */
428 public boolean hasLayer(Layer layer) {
429 return layers.contains(layer);
430 }
431
432 /**
433 * Tries to zoom to the download boundingbox[es] of the current edit layer
434 * (aka {@link OsmDataLayer}). If the edit layer has multiple download bounding
435 * boxes it zooms to a large virtual bounding box containing all smaller ones.
436 * This implementation can be used for resolving ticket #1461.
437 *
438 * @return <code>true</code> if a zoom operation has been performed
439 */
440 public boolean zoomToEditLayerBoundingBox() {
441 // workaround for #1461 (zoom to download bounding box instead of all data)
442 // In case we already have an existing data layer ...
443 OsmDataLayer layer= getEditLayer();
444 if (layer == null)
445 return false;
446 Collection<DataSource> dataSources = layer.data.dataSources;
447 // ... with bounding box[es] of data loaded from OSM or a file...
448 BoundingXYVisitor bbox = new BoundingXYVisitor();
449 for (DataSource ds : dataSources) {
450 bbox.visit(ds.bounds);
451 if (bbox.hasExtend()) {
452 // ... we zoom to it's bounding box
453 recalculateCenterScale(bbox);
454 return true;
455 }
456 }
457 return false;
458 }
459
460 public boolean addTemporaryLayer(MapViewPaintable mvp) {
461 if (temporaryLayers.contains(mvp)) return false;
462 return temporaryLayers.add(mvp);
463 }
464
465 public boolean removeTemporaryLayer(MapViewPaintable mvp) {
466 return temporaryLayers.remove(mvp);
467 }
468}
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