skrueger/i8n/LanguagesComboBox.java

package skrueger.i8n;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;
import java.util.Vector;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;

/**
 * A JComboBox that shows the user a list of languages
 */
public class LanguagesComboBox extends JComboBox {

        private Vector<String> availLangs = new Vector<String>();

        public LanguagesComboBox() {
                super();
        }

        /**
         * Create a ComboBox with the given langauges as options
         */
        public LanguagesComboBox(Collection<String> langCodes) {
                this();
                updateModel(langCodes, null);
        }

        /**
         * Create a ComboBox with the given languages as options, excluding the
         * second parameter.
         * 
         * @param langCodes
         *            If <code>null</code>, {@link I8NUtil#getLanguageCodes()} will
         *            be used
         */
        public LanguagesComboBox(Collection<String> langCodes,
                        Collection<String> langCodesNotOffer) {
                this();
                updateModel(langCodes, langCodesNotOffer);
        }

        public void updateModel(Collection<String> langCodes,
                        Collection<String> langCodesNotOffer) {

                if (langCodes == null) {
                        langCodes = I8NUtil.getLanguageCodes();
                }

                if (langCodesNotOffer != null) {
                        langCodes = new ArrayList<String>(langCodes);
                        langCodes.removeAll(langCodesNotOffer);
                }

                availLangs.clear();

                for (String lc : langCodes) {
                        Locale locale = I8NUtil.getFirstLocaleForLang(lc);

                        availLangs.add(locale.getDisplayLanguage() + " / "
                                        + locale.getDisplayLanguage(locale) + " " + lc);
                }

                Collections.sort(availLangs);

                setModel(new DefaultComboBoxModel(availLangs));
                setSelectedIndex(-1);
                repaint();
        }

        public String getSelectedLanguage() {
                if (getSelectedIndex() < 0)
                        return null;
                String langDescription = availLangs.get(getSelectedIndex());

                return langDescription.substring(langDescription.lastIndexOf(" "))
                                .trim();
        }

}
1	package skrueger.i8n;
2
3	import java.util.ArrayList;
4	import java.util.Collection;
5	import java.util.Collections;
6	import java.util.Locale;
7	import java.util.Vector;
8
9	import javax.swing.DefaultComboBoxModel;
10	import javax.swing.JComboBox;
11
12	/**
13	* A JComboBox that shows the user a list of languages
14	*/
15	public class LanguagesComboBox extends JComboBox {
16
17	private Vector<String> availLangs = new Vector<String>();
18
19	public LanguagesComboBox() {
20	super();
21	}
22
23	/**
24	* Create a ComboBox with the given langauges as options
25	*/
26	public LanguagesComboBox(Collection<String> langCodes) {
27	this();
28	updateModel(langCodes, null);
29	}
30
31	/**
32	* Create a ComboBox with the given languages as options, excluding the
33	* second parameter.
34	*
35	* @param langCodes
36	* If <code>null</code>, {@link I8NUtil#getLanguageCodes()} will
37	* be used
38	*/
39	public LanguagesComboBox(Collection<String> langCodes,
40	Collection<String> langCodesNotOffer) {
41	this();
42	updateModel(langCodes, langCodesNotOffer);
43	}
44
45	public void updateModel(Collection<String> langCodes,
46	Collection<String> langCodesNotOffer) {
47
48	if (langCodes == null) {
49	langCodes = I8NUtil.getLanguageCodes();
50	}
51
52	if (langCodesNotOffer != null) {
53	langCodes = new ArrayList<String>(langCodes);
54	langCodes.removeAll(langCodesNotOffer);
55	}
56
57	availLangs.clear();
58
59	for (String lc : langCodes) {
60	Locale locale = I8NUtil.getFirstLocaleForLang(lc);
61
62	availLangs.add(locale.getDisplayLanguage() + " / "
63	+ locale.getDisplayLanguage(locale) + " " + lc);
64	}
65
66	Collections.sort(availLangs);
67
68	setModel(new DefaultComboBoxModel(availLangs));
69	setSelectedIndex(-1);
70	repaint();
71	}
72
73	public String getSelectedLanguage() {
74	if (getSelectedIndex() < 0)
75	return null;
76	String langDescription = availLangs.get(getSelectedIndex());
77
78	return langDescription.substring(langDescription.lastIndexOf(" "))
79	.trim();
80	}
81
82	}
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