1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.preferences;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Component;
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7 | import java.util.ArrayList;
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8 | import java.util.Arrays;
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9 | import java.util.List;
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10 | import java.util.Locale;
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11 |
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12 | import javax.swing.Box;
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13 | import javax.swing.DefaultComboBoxModel;
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14 | import javax.swing.DefaultListCellRenderer;
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15 | import javax.swing.JComboBox;
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16 | import javax.swing.JLabel;
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17 | import javax.swing.JList;
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18 | import javax.swing.JPanel;
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19 | import javax.swing.ListCellRenderer;
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20 |
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21 | import org.openstreetmap.josm.Main;
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22 | import org.openstreetmap.josm.tools.GBC;
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23 | import org.openstreetmap.josm.tools.I18n;
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24 |
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25 | public class LanguagePreference implements PreferenceSetting {
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26 | public static class Factory implements PreferenceSettingFactory {
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27 | public PreferenceSetting createPreferenceSetting() {
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28 | return new LanguagePreference();
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29 | }
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30 | }
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31 |
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32 | /** the combo box with the available locales */
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33 | private JComboBox langCombo;
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34 | /** the model for the combo box */
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35 | private LanguageComboBoxModel model;
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36 |
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37 | public void addGui(final PreferenceTabbedPane gui) {
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38 | model = new LanguageComboBoxModel();
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39 | // Selecting the language BEFORE the JComboBox listens to model changes speed up initialization by ~35ms (see #7386)
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40 | // See http://stackoverflow.com/questions/3194958/fast-replacement-for-jcombobox-basiccomboboxui
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41 | model.selectLanguage(Main.pref.get("language"));
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42 | langCombo = new JComboBox(model);
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43 | langCombo.setRenderer(new LanguageCellRenderer(langCombo.getRenderer()));
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44 |
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45 | LafPreference lafPreference = gui.getSetting(LafPreference.class);
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46 | final JPanel panel = lafPreference.panel;
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47 | panel.add(new JLabel(tr("Language")), GBC.std().insets(20, 0, 0, 0));
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48 | panel.add(GBC.glue(5,0), GBC.std().fill(GBC.HORIZONTAL));
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49 | panel.add(langCombo, GBC.eol().fill(GBC.HORIZONTAL));
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50 | panel.add(Box.createVerticalGlue(), GBC.eol().fill(GBC.BOTH));
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51 | }
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52 |
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53 | public boolean ok() {
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54 | if(langCombo.getSelectedItem() == null)
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55 | return Main.pref.put("language", null);
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56 | else
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57 | return Main.pref.put("language",
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58 | ((Locale)langCombo.getSelectedItem()).toString());
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59 | }
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60 |
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61 | private static class LanguageComboBoxModel extends DefaultComboBoxModel {
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62 | private final List<Locale> data = new ArrayList<Locale>();
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63 |
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64 | public LanguageComboBoxModel(){
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65 | data.add(0,null);
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66 | data.addAll(Arrays.asList(I18n.getAvailableTranslations()));
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67 | }
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68 |
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69 | public void selectLanguage(String language) {
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70 | setSelectedItem(null);
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71 | if (language != null) {
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72 | for (Locale locale: data) {
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73 | if (locale == null) {
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74 | continue;
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75 | }
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76 | if (locale.toString().equals(language)) {
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77 | setSelectedItem(locale);
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78 | return;
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79 | }
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80 | }
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81 | }
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82 | }
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83 |
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84 | @Override
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85 | public Object getElementAt(int index) {
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86 | return data.get(index);
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87 | }
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88 |
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89 | @Override
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90 | public int getSize() {
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91 | return data.size();
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92 | }
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93 | }
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94 |
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95 | static private class LanguageCellRenderer extends DefaultListCellRenderer {
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96 | private ListCellRenderer dispatch;
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97 | public LanguageCellRenderer(ListCellRenderer dispatch) {
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98 | this.dispatch = dispatch;
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99 | }
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100 | @Override
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101 | public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected,
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102 | boolean cellHasFocus) {
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103 | Locale l = (Locale) value;
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104 | return dispatch.getListCellRendererComponent(list,
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105 | l == null ? tr("Default (Auto determined)") : l.getDisplayName(l),
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106 | index, isSelected, cellHasFocus);
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107 | }
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108 | }
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109 | }
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