source: trunk/gli/src/org/greenstone/gatherer/cdm/LanguageManager.java@ 12800

Last change on this file since 12800 was 12800, checked in by mdewsnip, 18 years ago

Tidied up CollectionConfiguration more.
  • Property svn:keywords set to Author Date Id Revision
File size: 26.2 KB
Line 
1/**
2 *#########################################################################
3 *
4 * A component of the Gatherer application, part of the Greenstone digital
5 * library suite from the New Zealand Digital Library Project at the
6 * University of Waikato, New Zealand.
7 *
8 * Author: John Thompson, Greenstone Digital Library, University of Waikato
9 *
10 * Copyright (C) 1999 New Zealand Digital Library Project
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *########################################################################
26 */
27package org.greenstone.gatherer.cdm;
28
29
30import java.awt.*;
31import java.awt.event.*;
32import java.io.*;
33import java.util.*;
34import javax.swing.*;
35import javax.swing.border.*;
36import javax.swing.event.*;
37import org.greenstone.gatherer.Configuration;
38import org.greenstone.gatherer.DebugStream;
39import org.greenstone.gatherer.Dictionary;
40import org.greenstone.gatherer.Gatherer;
41import org.greenstone.gatherer.gui.GLIButton;
42import org.greenstone.gatherer.metadata.MetadataElement;
43import org.greenstone.gatherer.metadata.MetadataSetManager;
44import org.greenstone.gatherer.util.CheckList;
45import org.greenstone.gatherer.util.CheckListEntry;
46import org.greenstone.gatherer.util.JarTools;
47import org.greenstone.gatherer.util.StaticStrings;
48import org.greenstone.gatherer.util.XMLTools;
49import org.w3c.dom.*;
50
51/** This class manages the language commands, remembering both a list of languages to build indexes in, plus the default language.
52 * @author John Thompson, Greenstone Digital Library, University of Waikato
53 * @version 2.3
54 */
55public class LanguageManager
56 extends DOMProxyListModel {
57
58 static public Document LANGUAGES_DOCUMENT = XMLTools.parseXMLFile("xml/languages.xml", true);
59
60 static final private Dimension COMPONENT_SIZE = new Dimension(125,25);
61
62 /** The visual controls for this manager. */
63 private Control controls = null;
64 /** A reference to this class as a model, for the inner controls class. */
65 private DOMProxyListModel model = null;
66 /** A hashtable of code->name mappings of known languages. */
67 private LinkedHashMap known_languages = null;
68 /** The default language object. */
69 private Language default_language = null;
70 /** The language metadata element - specifies which metadata the
71 language should be read from to determine the partitons */
72 private Element language_metadata = null;
73 /** Constructor. */
74 public LanguageManager(Element languages_element) {
75 super(languages_element, StaticStrings.LANGUAGE_ELEMENT, new Language());
76
77 DebugStream.println("LanguageManager: " + getSize() + " languages parsed.");
78
79 this.model = this;
80 // Retrieve the default language
81 NodeList default_language_elements = CollectionConfiguration.getElementsByTagName(StaticStrings.LANGUAGE_DEFAULT_ELEMENT);
82 if(default_language_elements.getLength() > 0) {
83 default_language = new Language((Element)default_language_elements.item(0));
84 }
85
86 // Retrieve the language metadata
87 language_metadata = CollectionDesignManager.collect_config.getLanguageMetadata();
88 // Load a series of code->language mappings into known_languages, by reading from the 'languages.xml' file, which is essentially a subset of the ISO 639 Standard.
89 known_languages = new LinkedHashMap();
90 NodeList language_elements = LANGUAGES_DOCUMENT.getDocumentElement().getElementsByTagName(StaticStrings.LANGUAGE_ELEMENT);
91 for(int i = 0; i < language_elements.getLength(); i++) {
92 Element language_element = (Element) language_elements.item(i);
93 String code = language_element.getAttribute(StaticStrings.CODE_ATTRIBUTE);
94 String name = language_element.getAttribute(StaticStrings.NAME_ATTRIBUTE);
95 known_languages.put(code.toLowerCase(), name);
96 name = null;
97 code = null;
98 language_element = null;
99 }
100 }
101
102 /** Method to add a new language.
103 * @param language The <strong>Language</strong> to add.
104 * @see org.greenstone.gatherer.Gatherer
105 * @see org.greenstone.gatherer.collection.CollectionManager
106 */
107 private void addLanguage(Language language) {
108 if(!contains(language)) {
109 // need to add a pseudo metadata
110 CollectionMeta metadatum = new CollectionMeta(StaticStrings.STOP_CHARACTER + language.getCode());
111 metadatum.setValue(language.getName());
112 CollectionDesignManager.collectionmeta_manager.addMetadatum(metadatum);
113 add(getSize(), language);
114 Gatherer.c_man.configurationChanged();
115 }
116 }
117
118 public void destroy() {
119 if(controls != null) {
120 controls.destroy();
121 controls = null;
122 }
123 known_languages.clear();
124 known_languages = null;
125 default_language = null;
126 }
127
128 /** Method to retrieve the control for this manager.
129 * @return the Control for editing the language partitions
130 */
131 public Control getControls() {
132 if(controls == null) {
133 // Build controls
134 controls = new LanguageControl();
135 }
136 return controls;
137 }
138
139 /** Method to retrieve a certain language object by its code.
140 * @param code The two letter code of a language, as a <strong>String</strong>.
141 * @return The <strong>Language</strong> that matches the given code, or <i>null</i> if no such language exists.
142 */
143 public Language getLanguage(String code) {
144 int size = getSize();
145 for(int i = 0; i < size; i++) {
146 Language language = (Language) getElementAt(i);
147 if(language.getCode().equals(code)) {
148 return language;
149 }
150 }
151 return null;
152 }
153
154 public ArrayList getLanguages() {
155 return children();
156 }
157
158 /** Method to return a list of the known language codes.
159 * @return an ArrayList containing the series of known language codes as per the languages.dat file
160 */
161 public ArrayList getLanguageCodes() {
162 return new ArrayList(known_languages.keySet());
163 }
164
165 public String getLanguageName(String code) {
166 return (String) known_languages.get(code);
167 }
168
169 /** Called when the detail mode has changed which in turn may cause several design elements to be available/hidden
170 * @param mode the new mode as an int
171 */
172 public void modeChanged(int mode) {
173
174 }
175
176 private int moveLanguage(Language lang, boolean move_up)
177 {
178 // Determine the current position of the language
179 int position = indexOf(lang);
180 int new_position;
181
182 // Attempt to move the language up
183 if (move_up) {
184 // Check it's not already at the top
185 if (position == 0) {
186 return position;
187 }
188
189 // This automatically removes the language first, as an Element can only exist once in a particular document
190 new_position = position - 1;
191 addBefore(lang, (Language) getElementAt(new_position));
192 }
193
194 // Attempt to move the language down
195 else {
196 // Check it's not already at the bottom
197 if (position == (getSize()) - 1) {
198 return position;
199 }
200
201 // This automatically removes the language first, as an Element can only exist once in a particular document
202 new_position = position + 1;
203 addAfter(lang, (Language) getElementAt(new_position));
204 }
205
206 // Schedule the collection for saving
207 Gatherer.c_man.configurationChanged();
208 return new_position;
209 }
210
211 /** Method to remove a certain language.
212 * @param language The <strong>Language</strong> to remove.
213 * @see org.greenstone.gatherer.Gatherer
214 * @see org.greenstone.gatherer.collection.CollectionManager
215 */
216 private void removeLanguage(Language language) {
217 remove(language);
218 // Remove any collection metadata for this language
219 CollectionDesignManager.collectionmeta_manager.removeMetadata(StaticStrings.STOP_CHARACTER + language.getCode());
220 if(default_language != null && default_language.equals(language)) {
221 setDefault(null);
222 }
223 Gatherer.c_man.configurationChanged();
224 }
225
226 private void replaceLanguage(Language old_language, Language new_language) {
227 // Remove old lang collection meta
228 CollectionDesignManager.collectionmeta_manager.removeMetadata(StaticStrings.STOP_CHARACTER + old_language.getCode());
229 // Add new one
230 CollectionMeta metadatum = new CollectionMeta(StaticStrings.STOP_CHARACTER + new_language.getCode());
231 metadatum.setValue(new_language.getName());
232 CollectionDesignManager.collectionmeta_manager.addMetadatum(metadatum);
233 if(default_language != null && default_language.equals(old_language)) {
234 setDefault(new_language);
235 }
236
237 // get the position of the old one
238 int position = indexOf(old_language);
239 remove(old_language);
240 add(position, new_language);
241
242 // Schedule the collection for saving
243 Gatherer.c_man.configurationChanged();
244
245 }
246 /** Method to set the default language.
247 * @param language The <strong>Language</strong> to use as a default, or <i>null</i> for no default.
248 * @see org.greenstone.gatherer.Gatherer
249 * @see org.greenstone.gatherer.collection.CollectionManager
250 */
251 public void setDefault(Language language) {
252 if(language != null) {
253 if(default_language == null) {
254 // Create the default index element, and place immediately after indexes element.
255 Element default_language_element = root.getOwnerDocument().createElement(StaticStrings.LANGUAGE_DEFAULT_ELEMENT);
256 default_language = new Language(default_language_element);
257 Node target_node = CollectionConfiguration.findInsertionPoint(default_language_element);
258 if(target_node != null) {
259 root.getOwnerDocument().getDocumentElement().insertBefore(default_language_element, target_node);
260 }
261 else {
262 root.getOwnerDocument().getDocumentElement().appendChild(default_language_element);
263 }
264 }
265 default_language.setAssigned(true);
266 default_language.setCode(language.getCode());
267 }
268 else {
269 if(default_language != null) {
270 default_language.setAssigned(false);
271 }
272 }
273 Gatherer.c_man.configurationChanged();
274 }
275
276
277 /** This class represents the visual component of the Language Manager. */
278 private class LanguageControl
279 extends JPanel
280 implements Control {
281 /** The list of available languages */
282 private CheckList language_list = null;
283 /** The button to add a new language support. */
284 private JButton add_button = null;
285 /** The button to replace a language support. */
286 private JButton replace_button = null;
287 /** The button to remove a supported language. */
288 private JButton remove_button = null;
289 /** button to move a language up in the list */
290 private JButton move_down_button;
291 /** button to move a language down in the list */
292 private JButton move_up_button;
293 /** The button to set the current language as the default one. */
294 private JButton set_default_button = null;
295 /** A list of currently supported languages. */
296 private JList selected_languages_list = null;
297 /** A list of metadata elements that may hold the language metadata */
298 private JComboBox language_metadata_combo = null;
299
300 /** Constructor.
301 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.AddListener
302 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.ClearDefaultListener
303 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.ListListener
304 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.RemoveListener
305 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.SelectorListener
306 * @see org.greenstone.gatherer.cdm.LanguageManager.LanguageControl.SetDefaultListener
307 */
308 public LanguageControl() {
309 super();
310 // Creation.
311 JPanel center_panel = new JPanel();
312
313 JLabel selected_languages_list_label = new JLabel(Dictionary.get("CDM.LanguageManager.Assigned_Languages"));
314 selected_languages_list = new JList(model);
315 selected_languages_list.setCellRenderer(new MyLanguageListCellRenderer());
316 selected_languages_list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
317 selected_languages_list.setVisibleRowCount(5);
318
319 JPanel control_panel = new JPanel();
320 JLabel selector_label = new JLabel(Dictionary.get("CDM.LanguageManager.Selector"));
321
322 language_metadata_combo = new JComboBox(MetadataSetManager.getEveryMetadataSetElement().toArray());
323 language_metadata_combo.setToolTipText(Dictionary.get("CDM.LanguageManager.LanguageMetadata_Tooltip"));
324 JLabel language_metadata_label = new JLabel(Dictionary.get("CDM.LanguageManager.LanguageMetadata"));
325 String current_value = "ex.Language";
326 if (language_metadata.getAttribute(StaticStrings.ASSIGNED_ATTRIBUTE).equals(StaticStrings.TRUE_STR) && !language_metadata.getAttribute(StaticStrings.NAME_ATTRIBUTE).equals("")) {
327 current_value = language_metadata.getAttribute(StaticStrings.NAME_ATTRIBUTE);
328 }
329 ArgumentControl.selectValue(language_metadata_combo, current_value);
330 language_list = new CheckList(false);
331 language_list.setListData(getLanguageCodes());
332 language_list.setToolTipText(Dictionary.get("CDM.LanguageManager.Selector_Tooltip"));
333 language_list.setCellRenderer(new LanguageCheckListCellRenderer());
334
335 JPanel movement_pane = new JPanel();
336 move_up_button = new GLIButton(Dictionary.get("CDM.Move.Move_Up"), JarTools.getImage("arrow-up.gif"), Dictionary.get("CDM.Move.Move_Up_Tooltip"));
337 move_up_button.setEnabled(false);
338
339 move_down_button = new GLIButton(Dictionary.get("CDM.Move.Move_Down"), JarTools.getImage("arrow-down.gif"), Dictionary.get("CDM.Move.Move_Down_Tooltip"));
340 move_down_button.setEnabled(false);
341
342 set_default_button = new GLIButton(Dictionary.get("CDM.LanguageManager.Set_Default"), Dictionary.get("CDM.LanguageManager.Set_Default_Tooltip"));
343 set_default_button.setEnabled(false);
344
345 JPanel button_panel = new JPanel();
346
347 add_button = new GLIButton(Dictionary.get("CDM.SubcollectionIndexManager.Add_Subindex"), Dictionary.get("CDM.LanguageManager.Add_Tooltip"));
348 add_button.setEnabled(false);
349
350 replace_button = new GLIButton(Dictionary.get("CDM.SubcollectionIndexManager.Replace_Subindex"), Dictionary.get("CDM.LanguageManager.Replace_Tooltip"));
351 replace_button.setEnabled(false);
352
353 remove_button = new GLIButton(Dictionary.get("CDM.SubcollectionIndexManager.Remove_Subindex"), Dictionary.get("CDM.LanguageManager.Remove_Tooltip"));
354 remove_button.setEnabled(false);
355
356 // Set up and connect listeners.
357 add_button.addActionListener(new AddListener());
358 add_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
359 move_down_button.addActionListener(new MoveListener(false));
360 move_down_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
361 move_up_button.addActionListener(new MoveListener(true));
362 move_up_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
363 remove_button.addActionListener(new RemoveListener());
364 remove_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
365 replace_button.addActionListener(new ReplaceListener());
366 replace_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
367
368 language_list.addListSelectionListener(new LanguageListListener());
369 language_metadata_combo.addActionListener(new ActionListener() {
370 public void actionPerformed(ActionEvent event) {
371 String value = ((MetadataElement)language_metadata_combo.getSelectedItem()).getFullName();
372 language_metadata.setAttribute(StaticStrings.ASSIGNED_ATTRIBUTE, StaticStrings.TRUE_STR);
373 language_metadata.setAttribute(StaticStrings.NAME_ATTRIBUTE, value);
374 Gatherer.c_man.configurationChanged();
375 }
376 });
377 set_default_button.addActionListener(new SetDefaultListener());
378 set_default_button.addActionListener(CollectionDesignManager.buildcol_change_listener);
379 selected_languages_list.addListSelectionListener(new AssignedListListener());
380
381 // Layout components
382 button_panel.setLayout(new GridLayout(1,3));
383 button_panel.add(add_button);
384 button_panel.add(replace_button);
385 button_panel.add(remove_button);
386
387 JPanel metadata_panel = new JPanel();
388 metadata_panel.setLayout(new BorderLayout());
389 JPanel inner_panel = new JPanel();
390 inner_panel.setLayout(new BorderLayout(10,10));
391 inner_panel.add(language_metadata_label, BorderLayout.WEST);
392 inner_panel.add(language_metadata_combo, BorderLayout.CENTER);
393 metadata_panel.add(new JPanel(), BorderLayout.CENTER);
394 metadata_panel.add(inner_panel, BorderLayout.EAST);
395
396 movement_pane.setBorder(BorderFactory.createEmptyBorder(0,2,0,0));
397 movement_pane.setLayout(new GridLayout(3,1));
398 movement_pane.add(move_up_button);
399 movement_pane.add(move_down_button);
400 movement_pane.add(set_default_button);
401
402 control_panel.setBorder(BorderFactory.createEmptyBorder(5,0,0,0));
403 control_panel.setLayout(new BorderLayout());
404 control_panel.add(selector_label, BorderLayout.WEST);
405 control_panel.add(new JScrollPane(language_list), BorderLayout.CENTER);
406 control_panel.add(button_panel, BorderLayout.SOUTH);
407
408 center_panel.setLayout(new BorderLayout());
409 center_panel.add(selected_languages_list_label, BorderLayout.NORTH);
410 center_panel.add(new JScrollPane(selected_languages_list), BorderLayout.CENTER);
411 center_panel.add(movement_pane, BorderLayout.EAST);
412
413 JPanel top_panel = new JPanel();
414 top_panel.setLayout(new BorderLayout());
415 top_panel.add(metadata_panel, BorderLayout.NORTH);
416 top_panel.add(center_panel, BorderLayout.SOUTH);
417
418 setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
419 setLayout(new BorderLayout());
420 add(top_panel, BorderLayout.NORTH);
421 add(control_panel, BorderLayout.CENTER);
422 }
423
424 /** Destructor. */
425 public void destroy() {
426 }
427
428 public void gainFocus() {
429 }
430
431 public void loseFocus() {
432 }
433
434
435 private void clearControls() {
436 selected_languages_list.clearSelection();
437 language_list.clearTicked();
438 add_button.setEnabled(false);
439 remove_button.setEnabled(false);
440 replace_button.setEnabled(false);
441 set_default_button.setEnabled(false);
442 move_down_button.setEnabled(false);
443 move_up_button.setEnabled(false);
444
445 }
446
447 private void updateControlsWithSelectedLanguage()
448 {
449 Language selected_lang = (Language) selected_languages_list.getSelectedValue();
450 if (selected_lang == null) {
451 clearControls();
452 return;
453 }
454
455 // Display the selected subcollection index's sources
456 language_list.clearTicked();
457 language_list.setTickedObjects(selected_lang.getCode().split(","));
458
459 }
460
461 private void validateButtons() {
462 boolean add_enabled = false;
463 boolean replace_enabled = false;
464
465 if (!language_list.isNothingTicked()) {
466 // Create a dummy Langauge and see if its in the collection
467 ArrayList langs = language_list.getTicked();
468 StringBuffer code_str = new StringBuffer();
469 boolean first = true;
470 for (int i=0; i<langs.size(); i++) {
471 if (!first) {
472 code_str.append(",");
473 } else {
474 first = false;
475 }
476 code_str.append(langs.get(i));
477 }
478 String lang_str = code_str.toString();
479
480 if (!model.contains(lang_str)) {
481 add_enabled = true;
482 if (!selected_languages_list.isSelectionEmpty()) {
483 replace_enabled = true;
484 }
485 }
486
487 }
488 add_button.setEnabled(add_enabled);
489 replace_button.setEnabled(replace_enabled);
490 }
491
492 /** Listens for actions apon the 'add' button in the LanguageManager controls, and if detected calls the add method of the manager with a newly created language. */
493 private class AddListener
494 implements ActionListener {
495 /** Add a new language support.
496 * @param event an ActionEvent
497 * @see org.greenstone.gatherer.cdm.Language
498 */
499 public void actionPerformed(ActionEvent event) {
500 if (!language_list.isNothingTicked()) {
501 addLanguage(new Language(language_list.getTicked()));
502 clearControls();
503 }
504 }
505 }
506
507 /** Listens for actions apon the 'remove' button in the LanguageManager controls, and if detected calls the remove method of the manager with the language selected for removal. */
508 private class RemoveListener
509 implements ActionListener {
510 /** Remove the currently selected language, if any.
511 * @param event An <strong>ActionEvent</strong>.
512 * @see org.greenstone.gatherer.cdm.Language
513 */
514 public void actionPerformed(ActionEvent event) {
515 Language delete_me = (Language)selected_languages_list.getSelectedValue();
516 if(delete_me != null) {
517 removeLanguage(delete_me);
518 }
519 }
520 }
521
522 private class ReplaceListener
523 implements ActionListener {
524
525 public void actionPerformed(ActionEvent event) {
526 if (selected_languages_list.isSelectionEmpty() || language_list.isNothingTicked()) {
527 // This should never happen, but just in case...
528 replace_button.setEnabled(false);
529 return;
530 }
531 Language old_language = (Language) selected_languages_list.getSelectedValue();
532 Language new_language = new Language(language_list.getTicked());
533 replaceLanguage(old_language, new_language);
534
535 }
536 }
537
538 private class LanguageListListener
539 implements ListSelectionListener {
540
541 public void valueChanged(ListSelectionEvent event) {
542 if (event.getValueIsAdjusting()) {
543 return;
544 }
545 validateButtons();
546 }
547 }
548
549 /** Listens for actions apon the 'set default' button in the LanguageManager controls, and if detected calls the <i>setDefault()</i> method of the manager with the language selected for default. */
550 private class SetDefaultListener
551 implements ActionListener {
552 /** Set the default index to the one currently selected, if any.
553 * @param event An <strong>ActionEvent</strong>.
554 * @see org.greenstone.gatherer.cdm.Language
555 */
556 public void actionPerformed(ActionEvent event) {
557 Language selected_language = (Language) selected_languages_list.getSelectedValue();
558 if(selected_language != null) {
559 setDefault(selected_language);
560 // This should cause a repaint of just the desired row
561 selected_languages_list.setSelectedValue(selected_language, true);
562 }
563 set_default_button.setEnabled(false);
564 }
565 }
566
567 private class MoveListener
568 implements ActionListener
569 {
570 private boolean move_up;
571
572 public MoveListener(boolean move_up)
573 {
574 this.move_up = move_up;
575 }
576
577 public void actionPerformed(ActionEvent event)
578 {
579 // Retrieve the selected language
580 Language language = (Language) selected_languages_list.getSelectedValue();
581 if (language != null) {
582 int new_position = moveLanguage(language, move_up);
583 // Ensure the language that moved is still selected
584 selected_languages_list.setSelectedIndex(new_position);
585 }
586 }
587 }
588
589
590 /** Listens for selections within the list on the LanguageManager controls, and if a change is detected enables, or disables, controls appropriately. */
591 private class AssignedListListener
592 implements ListSelectionListener {
593 /** Enable or disable controls depending on the current list selection.
594 * @param event A <strong>ListSelectionEvent</strong>.
595 */
596 public void valueChanged(ListSelectionEvent event) {
597 if (event.getValueIsAdjusting()) {
598 return;
599 }
600 if(selected_languages_list.isSelectionEmpty()) {
601 clearControls();
602 return;
603 }
604
605 int i = selected_languages_list.getSelectedIndex();
606 int size = selected_languages_list.getModel().getSize();
607 Language selected_lang = (Language)selected_languages_list.getSelectedValue();
608 remove_button.setEnabled(true);
609 replace_button.setEnabled(false);
610 add_button.setEnabled(false);
611 set_default_button.setEnabled(default_language == null || !default_language.equals(selected_lang));
612
613 if (i > 0) {
614 move_up_button.setEnabled(true);
615 }
616 else {
617 move_up_button.setEnabled(false);
618 }
619 if (i < size-1){
620 move_down_button.setEnabled(true);
621 }
622 else {
623 move_down_button.setEnabled(false);
624 }
625 updateControlsWithSelectedLanguage();
626 }
627 }
628
629 private class MyLanguageListCellRenderer
630 extends DefaultListCellRenderer
631 {
632 /** Return a component that has been configured to display the specified value. */
633 public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
634 JLabel component = (JLabel) super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
635 if (default_language != null && default_language.equals(value)) {
636 component.setText(component.getText() + " [" + Dictionary.get("CDM.LanguageManager.Default_Language")+"]");
637 }
638 return component;
639 }
640 }
641 }
642
643 /** A custom list cell renderer for producing rows which contain clickable check boxes. */
644 private class LanguageCheckListCellRenderer
645 implements ListCellRenderer
646 {
647 /** Return a component that has been configured to display the specified value. That component's paint method is then called to "render" the cell. If it is necessary to compute the dimensions of a list because the list cells do not have a fixed size, this method is called to generate a component on which getPreferredSize can be invoked.
648 * @param list The </strong>JList</strong> we're painting.
649 * @param value The value returned by list.getModel().getElementAt(index), as an <strong>Object</strong>.
650 * @param index The cells index as an <i>int</i>.
651 * @param is_selected <i>true</i> if the specified cell was selected, <i>false</i> otherwise.
652 * @param cell_has_focus <i>true</i> if and only if the specified cell has the focus.
653 * @return A <strong>Component</strong> whose paint() method will render the specified value.
654 */
655 public Component getListCellRendererComponent(JList list, Object value, int index, boolean is_selected, boolean cell_has_focus) {
656 JCheckBox checkbox = (JCheckBox) value;
657 checkbox.setBackground(list.getBackground());
658 checkbox.setForeground(list.getForeground());
659 checkbox.setBorderPainted(false);
660 checkbox.setEnabled(list.isEnabled());
661 checkbox.setFont(list.getFont());
662 checkbox.setFocusPainted(false);
663 checkbox.setBorder((is_selected) ? UIManager.getBorder("List.focusCellHighlightBorder") : new EmptyBorder(1, 1, 1, 1));
664
665 String code = (String)((CheckListEntry)list.getModel().getElementAt(index)).getObject();
666 checkbox.setText((String)known_languages.get(code));
667
668 return checkbox;
669 }
670 }
671
672}
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