Hi Guys,

I am a Chinese student. Some of my friends are rocket enthusiasts. They discovered the powerful OpenRocket in SourceForge but the language barrier is a headache problem so only few people could use the software.

When I was working on Chinese localization (l10n) these days, two main issues have been found.
(I haven't fully review the source code, maybe I am wrong in some points.)

1. Register supported language.

java.util.locale supports Language and Country, such as Fr_fr, En_US, En_GB, En_AU.
Of course, if set the language code without country code, Locale still works.
However, in China, which has two different language systems: Traditional Chinese and Simplified Chinese. Normally the language codes are zh_TW (Taiwai) and zh_CN (motherland).

A little enhancement could be done in [SwingPreferences.java]

    private static final List<Locale> SUPPORTED_LOCALES;
    static {
        List<Locale> list = new ArrayList<Locale>();
        for (String lang : new String[] { "en", "de", "es", "fr", "it", "ru", "cs", "pl"}) {   //original code
            list.add(new Locale(lang));
        }
        list.add(new Locale("zh","cn"));   //add
        list.add(new Locale("zh","tw"));   //add
        SUPPORTED_LOCALES = Collections.unmodifiableList(list);
    }

After modified this code and created two l10n language files (messages_zh_CN.properties, messages_zh_TW.properties), OpenRocket Preference -> Interface Languages will list the items properly.


2. Asian Fonts
When OpenRocket generates a diagram, it refers embedded font DejaVuSerif.ttf as default. Unfortunately, this font does not support Chinese or Japanese or other Asian languages, any words on the diagram will present as squares.
In my opinion, It is not recommended to embedded these fonts into OpenRocket because of their file size. I wish OpenRocket could implement a font selection menu in Preference window, for both java form font and diagram font.



Cheers,
celeron533