source: josm/trunk/src/org/openstreetmap/josm/gui/preferences/projection/ProjectionPreference.java

Last change on this file was 19112, checked in by stoecker, 2 years ago

javadoc fixes
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui.preferences.projection;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.awt.Component;
7import java.awt.GridBagLayout;
8import java.awt.event.ActionListener;
9import java.util.ArrayList;
10import java.util.Collection;
11import java.util.Collections;
12import java.util.Comparator;
13import java.util.HashMap;
14import java.util.List;
15import java.util.Map;
16import java.util.stream.IntStream;
17
18import javax.swing.BorderFactory;
19import javax.swing.JButton;
20import javax.swing.JLabel;
21import javax.swing.JOptionPane;
22import javax.swing.JPanel;
23import javax.swing.JScrollPane;
24import javax.swing.JSeparator;
25
26import org.openstreetmap.josm.actions.ExpertToggleAction;
27import org.openstreetmap.josm.data.Bounds;
28import org.openstreetmap.josm.data.SystemOfMeasurement;
29import org.openstreetmap.josm.data.coor.conversion.CoordinateFormatManager;
30import org.openstreetmap.josm.data.coor.conversion.ICoordinateFormat;
31import org.openstreetmap.josm.data.preferences.ListProperty;
32import org.openstreetmap.josm.data.preferences.StringProperty;
33import org.openstreetmap.josm.data.projection.CustomProjection;
34import org.openstreetmap.josm.data.projection.Projection;
35import org.openstreetmap.josm.data.projection.ProjectionRegistry;
36import org.openstreetmap.josm.data.projection.Projections;
37import org.openstreetmap.josm.gui.ExtendedDialog;
38import org.openstreetmap.josm.gui.MainApplication;
39import org.openstreetmap.josm.gui.help.HelpUtil;
40import org.openstreetmap.josm.gui.preferences.DefaultTabPreferenceSetting;
41import org.openstreetmap.josm.gui.preferences.PreferenceSetting;
42import org.openstreetmap.josm.gui.preferences.PreferenceSettingFactory;
43import org.openstreetmap.josm.gui.preferences.PreferenceTabbedPane;
44import org.openstreetmap.josm.gui.widgets.JosmComboBox;
45import org.openstreetmap.josm.gui.widgets.VerticallyScrollablePanel;
46import org.openstreetmap.josm.spi.preferences.Config;
47import org.openstreetmap.josm.tools.GBC;
48import org.openstreetmap.josm.tools.JosmRuntimeException;
49import org.openstreetmap.josm.tools.Logging;
50
51/**
52 * Projection preferences.
53 * <p>
54 * How to add new Projections:
55 * - Find EPSG code for the projection.
56 * - Look up the parameter string for Proj4, e.g. on <a href="https://spatialreference.org">https://spatialreference.org</a>/
57 * and add it to the file 'data/projection/epsg' in JOSM trunk
58 * - Search for official references and verify the parameter values. These
59 * documents are often available in the local language only.
60 * - Use {@link #registerProjectionChoice}, to make the entry known to JOSM.
61 * <p>
62 * In case there is no EPSG code:
63 * - override {@link AbstractProjectionChoice#getProjection()} and provide
64 * a manual implementation of the projection. Use {@link CustomProjection}
65 * if possible.
66 */
67public class ProjectionPreference extends DefaultTabPreferenceSetting {
68
69 /**
70 * Factory used to create a new {@code ProjectionPreference}.
71 */
72 public static class Factory implements PreferenceSettingFactory {
73 @Override
74 public PreferenceSetting createPreferenceSetting() {
75 return new ProjectionPreference();
76 }
77 }
78
79 private static final List<ProjectionChoice> projectionChoices = new ArrayList<>();
80 private static final Map<String, ProjectionChoice> projectionChoicesById = new HashMap<>();
81
82 /**
83 * WGS84: Directly use latitude / longitude values as x/y.
84 */
85 public static final ProjectionChoice wgs84 = registerProjectionChoice(tr("WGS84 Geographic"), "core:wgs84", 4326);
86
87 /**
88 * Mercator Projection.
89 * <p>
90 * The center of the mercator projection is always the 0 grad coordinate.
91 * <p>
92 * See also <a href="https://pubs.usgs.gov/bul/1532/report.pdf">USGS Bulletin 1532</a>
93 * initially EPSG used 3785 but that has been superseded by 3857, see <a href="https://www.epsg-registry.org/">epsg-registry.org</a>
94 */
95 public static final ProjectionChoice mercator = registerProjectionChoice(tr("Mercator"), "core:mercator", 3857);
96
97 /**
98 * Lambert conic conform 4 zones using the French geodetic system NTF.
99 * <p>
100 * This newer version uses the grid translation NTF ⟷ RGF93 provided by IGN for a submillimetric accuracy.
101 * (RGF93 is the French geodetic system similar to WGS84 but not mathematically equal)
102 * <p>
103 * Source: <a href="https://geodesie.ign.fr/contenu/fichiers/Changement_systeme_geodesique.pdf">Changement_systeme_geodesique.pdf</a>
104 */
105 public static final ProjectionChoice lambert = new LambertProjectionChoice();
106
107 /**
108 * French regions in the Caribbean Sea and Indian Ocean.
109 * <p>
110 * Using the UTM transvers Mercator projection and specific geodesic settings.
111 */
112 public static final ProjectionChoice utm_france_dom = new UTMFranceDOMProjectionChoice();
113
114 /**
115 * Lambert Conic Conform 9 Zones projection.
116 * <p>
117 * As specified by the IGN in this document
118 * <a href="https://geodesie.ign.fr/contenu/fichiers/documentation/rgf93/cc9zones.pdf">cc9zones.pdf</a>
119 */
120 public static final ProjectionChoice lambert_cc9 = new LambertCC9ZonesProjectionChoice();
121
122 static {
123
124 /* ***********************
125 * Global projections.
126 */
127
128 /* *
129 * UTM.
130 */
131 registerProjectionChoice(new UTMProjectionChoice());
132
133 /* ***********************
134 * Regional - alphabetical order by country code.
135 */
136
137 /*
138 * Belgian Lambert 72 projection.
139 * <p>
140 * As specified by the Belgian IGN in this document:
141 * http://www.ngi.be/Common/Lambert2008/Transformation_Geographic_Lambert_FR.pdf
142 *
143 * @author Don-vip
144 */
145 registerProjectionChoice(tr("Belgian Lambert 1972"), "core:belgianLambert1972", 31370); // BE
146
147 /*
148 * Belgian Lambert 2008 projection.
149 * <p>
150 * As specified by the Belgian IGN in this document:
151 * http://www.ngi.be/Common/Lambert2008/Transformation_Geographic_Lambert_FR.pdf
152 *
153 * @author Don-vip
154 */
155 registerProjectionChoice(tr("Belgian Lambert 2008"), "core:belgianLambert2008", 3812); // BE
156
157 /*
158 * SwissGrid CH1903 / L03, see https://en.wikipedia.org/wiki/Swiss_coordinate_system.
159 * <p>
160 * Actually, what we have here, is CH1903+ (EPSG:2056), but without
161 * the additional false easting of 2000km and false northing 1000 km.
162 * <p>
163 * To get to CH1903, a shift file is required. So currently, there are errors
164 * up to 1.6m (depending on the location).
165 */
166 registerProjectionChoice(new SwissGridProjectionChoice()); // CH
167
168 registerProjectionChoice(new GaussKruegerProjectionChoice()); // DE
169
170 /*
171 * Estonian Coordinate System of 1997.
172 * <p>
173 * Thanks to Johan Montagnat and its geoconv java converter application
174 * (https://www.i3s.unice.fr/~johan/gps/ , published under GPL license)
175 * from which some code and constants have been reused here.
176 */
177 registerProjectionChoice(tr("Lambert Zone (Estonia)"), "core:lambertest", 3301); // EE
178
179 /*
180 * Lambert conic conform 4 zones using the French geodetic system NTF.
181 * <p>
182 * This newer version uses the grid translation NTF<->RGF93 provided by IGN for a submillimetric accuracy.
183 * (RGF93 is the French geodetic system similar to WGS84 but not mathematically equal)
184 * <p>
185 * Source: https://geodesie.ign.fr/contenu/fichiers/Changement_systeme_geodesique.pdf
186 * @author Pieren
187 */
188 registerProjectionChoice(lambert); // FR
189
190 /*
191 * Lambert 93 projection.
192 * <p>
193 * As specified by the IGN in this document
194 * https://geodesie.ign.fr/contenu/fichiers/documentation/rgf93/Lambert-93.pdf
195 * @author Don-vip
196 */
197 registerProjectionChoice(tr("Lambert 93 (France)"), "core:lambert93", 2154); // FR
198
199 /*
200 * Lambert Conic Conform 9 Zones projection.
201 * <p>
202 * As specified by the IGN in this document
203 * https://geodesie.ign.fr/contenu/fichiers/documentation/rgf93/cc9zones.pdf
204 * @author Pieren
205 */
206 registerProjectionChoice(lambert_cc9); // FR
207
208 /*
209 * French departements in the Caribbean Sea and Indian Ocean.
210 * <p>
211 * Using the UTM transvers Mercator projection and specific geodesic settings.
212 */
213 registerProjectionChoice(utm_france_dom); // FR
214
215 /*
216 * LKS-92/ Latvia TM projection.
217 * <p>
218 * Based on data from spatialreference.org.
219 * https://spatialreference.org/ref/epsg/3059/
220 *
221 * @author Viesturs Zarins
222 */
223 registerProjectionChoice(tr("LKS-92 (Latvia TM)"), "core:tmerclv", 3059); // LV
224
225 /*
226 * Netherlands RD projection
227 *
228 * @author vholten
229 */
230 registerProjectionChoice(tr("Rijksdriehoekscoördinaten (Netherlands)"), "core:dutchrd", 28992); // NL
231
232 /*
233 * PUWG 1992 and 2000 are the official cordinate systems in Poland.
234 * <p>
235 * They use the same math as UTM only with different constants.
236 *
237 * @author steelman
238 */
239 registerProjectionChoice(new PuwgProjectionChoice()); // PL
240
241 /*
242 * SWEREF99 projections. Official coordinate system in Sweden.
243 */
244 registerProjectionChoice(tr("SWEREF99 TM / EPSG:3006 (Sweden)"), "core:sweref99tm", 3006); // SE
245 registerProjectionChoice(tr("SWEREF99 13 30 / EPSG:3008 (Sweden)"), "core:sweref99", 3008); // SE
246
247 /* ***********************
248 * Projection by Code.
249 */
250 registerProjectionChoice(new CodeProjectionChoice());
251
252 /* ***********************
253 * Custom projection.
254 */
255 registerProjectionChoice(new CustomProjectionChoice());
256 }
257
258 /**
259 * Registers a new projection choice.
260 * @param c projection choice
261 */
262 public static void registerProjectionChoice(ProjectionChoice c) {
263 projectionChoices.add(c);
264 projectionChoicesById.put(c.getId(), c);
265 for (String code : c.allCodes()) {
266 Projections.registerProjectionSupplier(code, () -> {
267 Collection<String> pref = c.getPreferencesFromCode(code);
268 c.setPreferences(pref);
269 try {
270 return c.getProjection();
271 } catch (JosmRuntimeException | IllegalArgumentException | IllegalStateException e) {
272 Logging.log(Logging.LEVEL_WARN, "Unable to get projection "+code+" with "+c+':', e);
273 return null;
274 }
275 });
276 }
277 }
278
279 /**
280 * Registers a new projection choice.
281 * @param name short name of the projection choice as shown in the GUI
282 * @param id short name of the projection choice as shown in the GUI
283 * @param epsg the unique numeric EPSG identifier for the projection
284 * @return the registered {@link ProjectionChoice}
285 */
286 private static ProjectionChoice registerProjectionChoice(String name, String id, Integer epsg) {
287 ProjectionChoice pc = new SingleProjectionChoice(name, id, "EPSG:"+epsg);
288 registerProjectionChoice(pc);
289 return pc;
290 }
291
292 /**
293 * Returns the list of projection choices.
294 * @return the list of projection choices
295 */
296 public static List<ProjectionChoice> getProjectionChoices() {
297 return Collections.unmodifiableList(projectionChoices);
298 }
299
300 private static String projectionChoice;
301
302 private static final StringProperty PROP_PROJECTION_DEFAULT = new StringProperty("projection.default", mercator.getId());
303 private static final StringProperty PROP_COORDINATES = new StringProperty("coordinates", null);
304 private static final ListProperty PROP_SUB_PROJECTION_DEFAULT = new ListProperty("projection.default.sub", null);
305
306 /**
307 * Combobox with all projections available
308 */
309 private final JosmComboBox<ProjectionChoice> projectionCombo;
310
311 /**
312 * Combobox with all coordinate display possibilities
313 */
314 private final JosmComboBox<ICoordinateFormat> coordinatesCombo;
315
316 /**
317 * Combobox with all system of measurements
318 */
319 private final JosmComboBox<SystemOfMeasurement> unitsCombo = new JosmComboBox<>(
320 SystemOfMeasurement.ALL_SYSTEMS.values().stream()
321 .sorted(Comparator.comparing(SystemOfMeasurement::toString))
322 .toArray(SystemOfMeasurement[]::new));
323
324 /**
325 * This variable holds the JPanel with the projection's preferences. If the
326 * selected projection does not implement this, it will be set to an empty
327 * Panel.
328 */
329 private JPanel projSubPrefPanel;
330 private final JPanel projSubPrefPanelWrapper = new JPanel(new GridBagLayout());
331
332 private final JLabel projectionCodeLabel = new JLabel(tr("Projection code"));
333 private final Component projectionCodeGlue = GBC.glue(5, 0);
334 private final JLabel projectionCode = new JLabel();
335 private final JLabel projectionNameLabel = new JLabel(tr("Projection name"));
336 private final Component projectionNameGlue = GBC.glue(5, 0);
337 private final JLabel projectionName = new JLabel();
338 private final JLabel bounds = new JLabel();
339
340 /**
341 * This is the panel holding all projection preferences
342 */
343 private final VerticallyScrollablePanel projPanel = new VerticallyScrollablePanel(new GridBagLayout());
344
345 /**
346 * The GridBagConstraints for the Panel containing the ProjectionSubPrefs.
347 * This is required twice in the code, creating it here keeps both occurrences
348 * in sync
349 */
350 private static final GBC projSubPrefPanelGBC = GBC.std().fill(GBC.BOTH).weight(1.0, 1.0);
351
352 /**
353 * Constructs a new {@code ProjectionPreference}.
354 */
355 public ProjectionPreference() {
356 super(/* ICON(preferences/) */ "map", tr("Map Projection"), tr("Map Projection"));
357 this.projectionCombo = new JosmComboBox<>(
358 projectionChoices.toArray(new ProjectionChoice[0]));
359 this.coordinatesCombo = new JosmComboBox<>(
360 CoordinateFormatManager.getCoordinateFormats().toArray(new ICoordinateFormat[0]));
361 }
362
363 @Override
364 public void addGui(PreferenceTabbedPane gui) {
365 final ProjectionChoice pc = setupProjectionCombo();
366
367 IntStream.range(0, coordinatesCombo.getItemCount())
368 .filter(i -> coordinatesCombo.getItemAt(i).getId().equals(PROP_COORDINATES.get())).findFirst()
369 .ifPresent(coordinatesCombo::setSelectedIndex);
370
371 unitsCombo.setSelectedItem(SystemOfMeasurement.getSystemOfMeasurement());
372
373 projPanel.add(new JLabel(tr("Projection method")), GBC.std().insets(5, 5, 0, 5));
374 projPanel.add(GBC.glue(5, 0), GBC.std().fill(GBC.HORIZONTAL));
375 projPanel.add(projectionCombo, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
376 projPanel.add(projectionCodeLabel, GBC.std().insets(25, 5, 0, 5));
377 projPanel.add(projectionCodeGlue, GBC.std().fill(GBC.HORIZONTAL));
378 projPanel.add(projectionCode, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
379 projPanel.add(projectionNameLabel, GBC.std().insets(25, 5, 0, 5));
380 projPanel.add(projectionNameGlue, GBC.std().fill(GBC.HORIZONTAL));
381 projPanel.add(projectionName, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
382 projPanel.add(new JLabel(tr("Bounds")), GBC.std().insets(25, 5, 0, 5));
383 projPanel.add(GBC.glue(5, 0), GBC.std().fill(GBC.HORIZONTAL));
384 projPanel.add(bounds, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
385 projPanel.add(projSubPrefPanelWrapper, GBC.eol().fill(GBC.HORIZONTAL).insets(20, 5, 5, 5));
386
387 projectionCodeLabel.setLabelFor(projectionCode);
388 projectionNameLabel.setLabelFor(projectionName);
389
390 JButton btnSetAsDefault = new JButton(tr("Set as default"));
391 projPanel.add(btnSetAsDefault, GBC.eol().insets(5, 10, 5, 5));
392 btnSetAsDefault.addActionListener(e -> {
393 ProjectionChoice pc2 = (ProjectionChoice) projectionCombo.getSelectedItem();
394 String id = pc2.getId();
395 Collection<String> prefs = pc2.getPreferences(projSubPrefPanel);
396 setProjection(id, prefs, true);
397 pc2.setPreferences(prefs);
398 Projection proj = pc2.getProjection();
399 new ExtendedDialog(gui, tr("Default projection"), tr("OK"))
400 .setButtonIcons("ok")
401 .setIcon(JOptionPane.INFORMATION_MESSAGE)
402 .setContent(tr("Default projection has been set to ''{0}''", proj.toCode()))
403 .showDialog();
404 });
405 ExpertToggleAction.addVisibilitySwitcher(btnSetAsDefault);
406
407 projPanel.add(new JSeparator(), GBC.eol().fill(GBC.HORIZONTAL).insets(0, 5, 0, 10));
408 projPanel.add(new JLabel(tr("Display coordinates as")), GBC.std().insets(5, 5, 0, 5));
409 projPanel.add(GBC.glue(5, 0), GBC.std().fill(GBC.HORIZONTAL));
410 projPanel.add(coordinatesCombo, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
411 projPanel.add(new JLabel(tr("System of measurement")), GBC.std().insets(5, 5, 0, 5));
412 projPanel.add(GBC.glue(5, 0), GBC.std().fill(GBC.HORIZONTAL));
413 projPanel.add(unitsCombo, GBC.eop().fill(GBC.HORIZONTAL).insets(0, 5, 5, 5));
414 projPanel.add(GBC.glue(1, 1), GBC.std().fill(GBC.HORIZONTAL).weight(1.0, 1.0));
415
416 JScrollPane scrollPane = projPanel.getVerticalScrollPane();
417 scrollPane.setBorder(BorderFactory.createEmptyBorder());
418 gui.createPreferenceTab(this).add(scrollPane, GBC.std().fill());
419
420 selectedProjectionChanged(pc);
421 }
422
423 private void updateMeta(ProjectionChoice pc) {
424 pc.setPreferences(pc.getPreferences(projSubPrefPanel));
425 Projection proj = pc.getProjection();
426 projectionCode.setText(proj.toCode());
427 projectionName.setText(proj.toString());
428 Bounds b = proj.getWorldBoundsLatLon();
429 ICoordinateFormat cf = CoordinateFormatManager.getDefaultFormat();
430 bounds.setText(cf.lonToString(b.getMin()) + ", " + cf.latToString(b.getMin()) + " : " +
431 cf.lonToString(b.getMax()) + ", " + cf.latToString(b.getMax()));
432 boolean showCode = true;
433 boolean showName = false;
434 if (pc instanceof SubPrefsOptions) {
435 showCode = ((SubPrefsOptions) pc).showProjectionCode();
436 showName = ((SubPrefsOptions) pc).showProjectionName();
437 }
438 projectionCodeLabel.setVisible(showCode);
439 projectionCodeGlue.setVisible(showCode);
440 projectionCode.setVisible(showCode);
441 projectionNameLabel.setVisible(showName);
442 projectionNameGlue.setVisible(showName);
443 projectionName.setVisible(showName);
444 }
445
446 @Override
447 public boolean ok() {
448 ProjectionChoice pc = (ProjectionChoice) projectionCombo.getSelectedItem();
449
450 String id = pc.getId();
451 Collection<String> prefs = pc.getPreferences(projSubPrefPanel);
452
453 setProjection(id, prefs, false);
454
455 ICoordinateFormat selectedItem = (ICoordinateFormat) coordinatesCombo.getSelectedItem();
456 if (selectedItem != null && PROP_COORDINATES.put(selectedItem.getId())) {
457 CoordinateFormatManager.setCoordinateFormat(selectedItem);
458 }
459
460 SystemOfMeasurement.setSystemOfMeasurement(((SystemOfMeasurement) unitsCombo.getSelectedItem()));
461
462 return false;
463 }
464
465 /**
466 * Set default projection.
467 */
468 public static void setProjection() {
469 setProjection(PROP_PROJECTION_DEFAULT.get(), PROP_SUB_PROJECTION_DEFAULT.get(), false);
470 }
471
472 /**
473 * Set projection.
474 * @param id id of the selected projection choice
475 * @param pref the configuration for the selected projection choice
476 * @param makeDefault true, if it is to be set as permanent default
477 * false, if it is to be set for the current session
478 * @since 12306
479 */
480 public static void setProjection(String id, Collection<String> pref, boolean makeDefault) {
481 ProjectionChoice pc = projectionChoicesById.get(id);
482
483 if (pc == null) {
484 JOptionPane.showMessageDialog(
485 MainApplication.getMainFrame(),
486 tr("The projection {0} could not be activated. Using Mercator", id),
487 tr("Error"),
488 JOptionPane.ERROR_MESSAGE
489 );
490 pref = null;
491 pc = mercator;
492 }
493 id = pc.getId();
494 Config.getPref().putList("projection.sub."+id, pref == null ? null : new ArrayList<>(pref));
495 if (makeDefault) {
496 PROP_PROJECTION_DEFAULT.put(id);
497 PROP_SUB_PROJECTION_DEFAULT.put(pref == null ? null : new ArrayList<>(pref));
498 } else {
499 projectionChoice = id;
500 }
501 pc.setPreferences(pref);
502 Projection proj = pc.getProjection();
503 ProjectionRegistry.setProjection(proj);
504 }
505
506 /**
507 * Handles all the work related to update the projection-specific
508 * preferences
509 * @param pc the choice class representing user selection
510 */
511 private void selectedProjectionChanged(final ProjectionChoice pc) {
512 // Don't try to update if we're still starting up
513 int size = projPanel.getComponentCount();
514 if (size < 1)
515 return;
516
517 final ActionListener listener = e -> updateMeta(pc);
518
519 // Replace old panel with new one
520 projSubPrefPanelWrapper.removeAll();
521 projSubPrefPanel = pc.getPreferencePanel(listener);
522 projSubPrefPanelWrapper.add(projSubPrefPanel, projSubPrefPanelGBC);
523 projPanel.revalidate();
524 projSubPrefPanel.repaint();
525 updateMeta(pc);
526 }
527
528 /**
529 * Sets up projection combobox with default values and action listener
530 * @return the choice class for user selection
531 */
532 private ProjectionChoice setupProjectionCombo() {
533 String pcId = getCurrentProjectionChoiceId();
534 ProjectionChoice pc = null;
535 for (int i = 0; i < projectionCombo.getItemCount(); ++i) {
536 ProjectionChoice pc1 = projectionCombo.getItemAt(i);
537 pc1.setPreferences(getSubprojectionPreference(pc1.getId()));
538 if (pc1.getId().equals(pcId)) {
539 projectionCombo.setSelectedIndex(i);
540 selectedProjectionChanged(pc1);
541 pc = pc1;
542 }
543 }
544 // If the ProjectionChoice from the preferences is not available, it
545 // should have been set to Mercator at JOSM start.
546 if (pc == null)
547 throw new JosmRuntimeException("Couldn't find the current projection in the list of available projections!");
548
549 projectionCombo.addActionListener(e -> {
550 ProjectionChoice pc1 = (ProjectionChoice) projectionCombo.getSelectedItem();
551 selectedProjectionChanged(pc1);
552 });
553 return pc;
554 }
555
556 /**
557 * Get the id of the projection choice that is currently set.
558 * @return id of the projection choice that is currently set
559 */
560 public static String getCurrentProjectionChoiceId() {
561 return projectionChoice != null ? projectionChoice : PROP_PROJECTION_DEFAULT.get();
562 }
563
564 /**
565 * Get the preferences that have been selected the last time for the given
566 * projection choice.
567 * @param pcId id of the projection choice
568 * @return projection choice parameters that have been selected by the user
569 * the last time; null if user has never selected the given projection choice
570 */
571 public static Collection<String> getSubprojectionPreference(String pcId) {
572 return Config.getPref().getList("projection.sub."+pcId, null);
573 }
574
575 @Override
576 public boolean isExpert() {
577 return false;
578 }
579
580 /**
581 * Selects the given projection.
582 * @param projection The projection to select.
583 * @since 5604
584 */
585 public void selectProjection(ProjectionChoice projection) {
586 if (projectionCombo != null && projection != null) {
587 projectionCombo.setSelectedItem(projection);
588 }
589 }
590
591 @Override
592 public String getHelpContext() {
593 return HelpUtil.ht("/Preferences/Map");
594 }
595}
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