source: josm/trunk/src/org/openstreetmap/josm/gui/MapView.java@ 1808

Last change on this file since 1808 was 1808, checked in by Gubaer, 15 years ago

improved enabling/disabling of menu entries and action buttons depending on current state of JOSM (number of open layers, type of active layer, etc.)
  • Property svn:eol-style set to native
File size: 15.4 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.image.BufferedImage;
16import java.util.ArrayList;
17import java.util.Collection;
18import java.util.Collections;
19import java.util.Enumeration;
20import java.util.LinkedList;
21
22import javax.swing.AbstractButton;
23import javax.swing.JComponent;
24import javax.swing.JOptionPane;
25
26import org.openstreetmap.josm.Main;
27import org.openstreetmap.josm.actions.AutoScaleAction;
28import org.openstreetmap.josm.actions.JosmAction;
29import org.openstreetmap.josm.actions.MoveAction;
30import org.openstreetmap.josm.actions.mapmode.MapMode;
31import org.openstreetmap.josm.data.ProjectionBounds;
32import org.openstreetmap.josm.data.SelectionChangedListener;
33import org.openstreetmap.josm.data.osm.DataSet;
34import org.openstreetmap.josm.data.osm.DataSource;
35import org.openstreetmap.josm.data.osm.OsmPrimitive;
36import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
37import org.openstreetmap.josm.gui.layer.Layer;
38import org.openstreetmap.josm.gui.layer.MapViewPaintable;
39import org.openstreetmap.josm.gui.layer.OsmDataLayer;
40import org.openstreetmap.josm.gui.layer.OsmDataLayer.ModifiedChangedListener;
41import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
42import org.openstreetmap.josm.gui.layer.markerlayer.PlayHeadMarker;
43import org.openstreetmap.josm.tools.AudioPlayer;
44
45/**
46 * This is a component used in the MapFrame for browsing the map. It use is to
47 * provide the MapMode's enough capabilities to operate.
48 *
49 * MapView hold meta-data about the data set currently displayed, as scale level,
50 * center point viewed, what scrolling mode or editing mode is selected or with
51 * what projection the map is viewed etc..
52 *
53 * MapView is able to administrate several layers.
54 *
55 * @author imi
56 */
57public class MapView extends NavigatableComponent {
58
59
60 /**
61 * A list of all layers currently loaded.
62 */
63 private ArrayList<Layer> layers = new ArrayList<Layer>();
64 /**
65 * The play head marker: there is only one of these so it isn't in any specific layer
66 */
67 public PlayHeadMarker playHeadMarker = null;
68
69 /**
70 * The layer from the layers list that is currently active.
71 */
72 private Layer activeLayer;
73
74 /**
75 * The last event performed by mouse.
76 */
77 public MouseEvent lastMEvent;
78
79 private LinkedList<MapViewPaintable> temporaryLayers = new LinkedList<MapViewPaintable>();
80
81 private BufferedImage offscreenBuffer;
82
83 public MapView() {
84 addComponentListener(new ComponentAdapter(){
85 @Override public void componentResized(ComponentEvent e) {
86 removeComponentListener(this);
87
88 MapSlider zoomSlider = new MapSlider(MapView.this);
89 add(zoomSlider);
90 zoomSlider.setBounds(3, 0, 114, 30);
91
92 MapScaler scaler = new MapScaler(MapView.this);
93 add(scaler);
94 scaler.setLocation(10,30);
95
96 if (!zoomToEditLayerBoundingBox()) {
97 new AutoScaleAction("data").actionPerformed(null);
98 }
99
100 new MapMover(MapView.this, Main.contentPane);
101 JosmAction mv;
102 mv = new MoveAction(MoveAction.Direction.UP);
103 if (mv.getShortcut() != null) {
104 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "UP");
105 Main.contentPane.getActionMap().put("UP", mv);
106 }
107 mv = new MoveAction(MoveAction.Direction.DOWN);
108 if (mv.getShortcut() != null) {
109 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "DOWN");
110 Main.contentPane.getActionMap().put("DOWN", mv);
111 }
112 mv = new MoveAction(MoveAction.Direction.LEFT);
113 if (mv.getShortcut() != null) {
114 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "LEFT");
115 Main.contentPane.getActionMap().put("LEFT", mv);
116 }
117 mv = new MoveAction(MoveAction.Direction.RIGHT);
118 if (mv.getShortcut() != null) {
119 Main.contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(mv.getShortcut().getKeyStroke(), "RIGHT");
120 Main.contentPane.getActionMap().put("RIGHT", mv);
121 }
122 }
123 });
124
125 // listend to selection changes to redraw the map
126 DataSet.selListeners.add(new SelectionChangedListener(){
127 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
128 repaint();
129 }
130 });
131
132 //store the last mouse action
133 this.addMouseMotionListener(new MouseMotionListener() {
134 public void mouseDragged(MouseEvent e) {
135 mouseMoved(e);
136 }
137 public void mouseMoved(MouseEvent e) {
138 lastMEvent = e;
139 }
140 });
141 }
142
143 /**
144 * Add a layer to the current MapView. The layer will be added at topmost
145 * position.
146 */
147 public void addLayer(Layer layer) {
148 if (layer instanceof OsmDataLayer) {
149 OsmDataLayer editLayer = (OsmDataLayer)layer;
150 Main.ds = editLayer.data;
151 editLayer.listenerModified.add(new ModifiedChangedListener(){
152 public void modifiedChanged(boolean value, OsmDataLayer source) {
153 JOptionPane.getFrameForComponent(Main.parent).setTitle((value?"*":"")
154 +tr("Java OpenStreetMap Editor"));
155 }
156 });
157 }
158 if (layer instanceof MarkerLayer && playHeadMarker == null) {
159 playHeadMarker = PlayHeadMarker.create();
160 }
161 int pos = layers.size();
162 while(pos > 0 && layers.get(pos-1).background) {
163 --pos;
164 }
165 layers.add(pos, layer);
166
167 for (Layer.LayerChangeListener l : Layer.listeners) {
168 l.layerAdded(layer);
169 }
170 if (layer instanceof OsmDataLayer || activeLayer == null) {
171 // autoselect the new layer
172 Layer old = activeLayer;
173 setActiveLayer(layer);
174 for (Layer.LayerChangeListener l : Layer.listeners) {
175 l.activeLayerChange(old, layer);
176 }
177 }
178 AudioPlayer.reset();
179 repaint();
180 }
181
182 @Override
183 protected DataSet getData() {
184 if(activeLayer != null && activeLayer instanceof OsmDataLayer)
185 return ((OsmDataLayer)activeLayer).data;
186 return new DataSet();
187 }
188
189 /**
190 * Replies true if the active layer is drawable.
191 *
192 * @return true if the active layer is drawable, false otherwise
193 */
194 public boolean isActiveLayerDrawable() {
195 return activeLayer != null && activeLayer instanceof OsmDataLayer;
196 }
197
198 /**
199 * Replies true if the active layer is visible.
200 *
201 * @return true if the active layer is visible, false otherwise
202 */
203 public boolean isActiveLayerVisible() {
204 return isActiveLayerDrawable() && activeLayer.visible;
205 }
206
207 /**
208 * Remove the layer from the mapview. If the layer was in the list before,
209 * an LayerChange event is fired.
210 */
211 public void removeLayer(Layer layer) {
212 if (layer == activeLayer) {
213 if (layer instanceof OsmDataLayer) {
214 Main.ds = null;
215 }
216 activeLayer = null;
217 }
218 if (layers.remove(layer)) {
219 for (Layer.LayerChangeListener l : Layer.listeners) {
220 l.layerRemoved(layer);
221 }
222 }
223 layer.destroy();
224 AudioPlayer.reset();
225 }
226
227 private boolean virtualNodesEnabled = false;
228 public void setVirtualNodesEnabled(boolean enabled) {
229 if(virtualNodesEnabled != enabled) {
230 virtualNodesEnabled = enabled;
231 repaint();
232 }
233 }
234 public boolean isVirtualNodesEnabled() {
235 return virtualNodesEnabled;
236 }
237
238 /**
239 * Moves the layer to the given new position. No event is fired.
240 * @param layer The layer to move
241 * @param pos The new position of the layer
242 */
243 public void moveLayer(Layer layer, int pos) {
244 int curLayerPos = layers.indexOf(layer);
245 if (curLayerPos == -1)
246 throw new IllegalArgumentException(tr("layer not in list."));
247 if (pos == curLayerPos)
248 return; // already in place.
249 layers.remove(curLayerPos);
250 if (pos >= layers.size()) {
251 layers.add(layer);
252 } else {
253 layers.add(pos, layer);
254 }
255 AudioPlayer.reset();
256 }
257
258
259 public int getLayerPos(Layer layer) {
260 int curLayerPos = layers.indexOf(layer);
261 if (curLayerPos == -1)
262 throw new IllegalArgumentException(tr("layer not in list."));
263 return curLayerPos;
264 }
265
266 /**
267 * Draw the component.
268 */
269 @Override public void paint(Graphics g) {
270 if (center == null)
271 return; // no data loaded yet.
272
273 // re-create offscreen-buffer if we've been resized, otherwise
274 // just re-use it.
275 if (null == offscreenBuffer || offscreenBuffer.getWidth() != getWidth()
276 || offscreenBuffer.getHeight() != getHeight()) {
277 offscreenBuffer = new BufferedImage(getWidth(), getHeight(),
278 BufferedImage.TYPE_INT_ARGB);
279 }
280
281 Graphics2D tempG = offscreenBuffer.createGraphics();
282 tempG.setColor(Main.pref.getColor("background", Color.BLACK));
283 tempG.fillRect(0, 0, getWidth(), getHeight());
284
285 for (int i = layers.size()-1; i >= 0; --i) {
286 Layer l = layers.get(i);
287 if (l.visible/* && l != getActiveLayer()*/) {
288 l.paint(tempG, this);
289 }
290 }
291
292 /*if (getActiveLayer() != null && getActiveLayer().visible)
293 getActiveLayer().paint(tempG, this);*/
294
295 for (MapViewPaintable mvp : temporaryLayers) {
296 mvp.paint(tempG, this);
297 }
298
299 // draw world borders
300 tempG.setColor(Color.WHITE);
301 ProjectionBounds b = getProjection().getWorldBounds();
302 Point min = getPoint(b.min);
303 Point max = getPoint(b.max);
304 int x1 = Math.min(min.x, max.x);
305 int y1 = Math.min(min.y, max.y);
306 int x2 = Math.max(min.x, max.x);
307 int y2 = Math.max(min.y, max.y);
308 if (x1 > 0 || y1 > 0 || x2 < getWidth() || y2 < getHeight()) {
309 tempG.drawRect(x1, y1, x2-x1+1, y2-y1+1);
310 }
311
312 if (playHeadMarker != null) {
313 playHeadMarker.paint(tempG, this);
314 }
315
316 g.drawImage(offscreenBuffer, 0, 0, null);
317 super.paint(g);
318 }
319
320 /**
321 * Set the new dimension to the view.
322 */
323 public void recalculateCenterScale(BoundingXYVisitor box) {
324 if (box == null) {
325 box = new BoundingXYVisitor();
326 }
327 if (box.getBounds() == null) {
328 box.visit(getProjection().getWorldBounds());
329 }
330 if (!box.hasExtend()) {
331 box.enlargeBoundingBox();
332 }
333
334 zoomTo(box.getBounds());
335 }
336
337 /**
338 * @return An unmodifiable collection of all layers
339 */
340 public Collection<Layer> getAllLayers() {
341 return Collections.unmodifiableCollection(layers);
342 }
343
344 /**
345 * Sets the active layer to <code>layer</code>. If <code>layer</code> is an instance
346 * of {@see OsmDataLayer} also sets {@see #editLayer} to <code>layer</code>.
347 *
348 * @param layer the layer to be activate; must be one of the layers in the list of layers
349 * @exception IllegalArgumentException thrown if layer is not in the lis of layers
350 */
351 public void setActiveLayer(Layer layer) {
352 if (!layers.contains(layer))
353 throw new IllegalArgumentException(tr("Layer {0} must be in list of layers", layer.toString()));
354 if (layer instanceof OsmDataLayer) {
355 OsmDataLayer editLayer = (OsmDataLayer)layer;
356 Main.ds = editLayer.data;
357 } else {
358 Main.ds.setSelected();
359 }
360 DataSet.fireSelectionChanged(Main.ds.getSelected());
361 Layer old = activeLayer;
362 activeLayer = layer;
363 if (old != layer) {
364 for (Layer.LayerChangeListener l : Layer.listeners) {
365 l.activeLayerChange(old, layer);
366 }
367 }
368
369 /* This only makes the buttons look disabled. Disabling the actions as well requires
370 * the user to re-select the tool after i.e. moving a layer. While testing I found
371 * that I switch layers and actions at the same time and it was annoying to mind the
372 * order. This way it works as visual clue for new users */
373 for (Enumeration<AbstractButton> e = Main.map.toolGroup.getElements() ; e.hasMoreElements() ;) {
374 AbstractButton x=e.nextElement();
375 x.setEnabled(((MapMode)x.getAction()).layerIsSupported(layer));
376 }
377 AudioPlayer.reset();
378 repaint();
379 }
380
381 /**
382 * Replies the currently active layer
383 *
384 * @return the currently active layer (may be null)
385 */
386 public Layer getActiveLayer() {
387 return activeLayer;
388 }
389
390 /**
391 * Replies the current edit layer, if any
392 *
393 * @return the current edit layer. May be null.
394 */
395 public OsmDataLayer getEditLayer() {
396 if (activeLayer instanceof OsmDataLayer)
397 return (OsmDataLayer)activeLayer;
398 return null;
399 }
400
401 /**
402 * replies true if the list of layers managed by this map view contain layer
403 *
404 * @param layer the layer
405 * @return true if the list of layers managed by this map view contain layer
406 */
407 public boolean hasLayer(Layer layer) {
408 return layers.contains(layer);
409 }
410
411 /**
412 * Tries to zoom to the download boundingbox[es] of the current edit layer
413 * (aka {@link OsmDataLayer}). If the edit layer has multiple download bounding
414 * boxes it zooms to a large virtual bounding box containing all smaller ones.
415 * This implementation can be used for resolving ticket #1461.
416 *
417 * @return <code>true</code> if a zoom operation has been performed
418 */
419 public boolean zoomToEditLayerBoundingBox() {
420 // workaround for #1461 (zoom to download bounding box instead of all data)
421 // In case we already have an existing data layer ...
422 OsmDataLayer layer= getEditLayer();
423 if (layer == null)
424 return false;
425 Collection<DataSource> dataSources = layer.data.dataSources;
426 // ... with bounding box[es] of data loaded from OSM or a file...
427 BoundingXYVisitor bbox = new BoundingXYVisitor();
428 for (DataSource ds : dataSources) {
429 bbox.visit(ds.bounds);
430 if (bbox.hasExtend()) {
431 // ... we zoom to it's bounding box
432 recalculateCenterScale(bbox);
433 return true;
434 }
435 }
436 return false;
437 }
438
439 public boolean addTemporaryLayer(MapViewPaintable mvp) {
440 if (temporaryLayers.contains(mvp)) return false;
441 return temporaryLayers.add(mvp);
442 }
443
444 public boolean removeTemporaryLayer(MapViewPaintable mvp) {
445 return temporaryLayers.remove(mvp);
446 }
447}
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