Wt

Hi Ruliang,

That is no problem, Wt works internally with UTF-8 strings and is therefore capable of representing chinese characters.

So how can you get your chinese in your WText? There's a number of ways (just giving a few here):

(1) Use our message resource bundle system (recommended for string literals)

This is what you often see in our examples. See WApplication::messageResourceBundle(), WWidget::tr(), WApplication::locale(), ... The chinese text is stored in an external XML file in UTF-8 format.

(2) Construct a WString from a UTF-8 string and pass it to the WText (recommended for all other cases):

Use WString::fromUTF8(): myText->setText(WString::fromUTF8(stringThatComesFromDatabase));

Use this method if your string was already available as UTF-8 text

(3) String literals in your C file (not recommended):

Use wchar_t strings in C to represent your chinese characters: myText->setText(L"put chinese characters here"); It cannot be guaranteed that this is portable.

Note that you can pass a c std::locale to the WString constructors to specify the locale of a char*, which Wt then uses to convert to UTF-8.

Regards,

Wim.

Then, how to correctly switch locale? Server is Ubuntu.

The code below:

std::cout<<env.locale()<<std::endl;

setLocale("ru_RU.UTF-8");

std::cout<<env.locale()<<std::endl;

gives me:

en-us

en-us

wApp->setLocale("ru-RU");

WEnvironment::locale() returns the language that the browser requests, so it will not be changed as consequence of calling WApplication::setLocale().

BR,

Wim.

The problematic with SuggestionPopup

I receive std::string from Google Geocoder through JSignalstd::string, then Im trying to add it as a suggestion sp_->addSuggestion(str,str);

I case of str contains Cyrillic I have Wt message: [error] "WString::widen(): could not widen string: Москва"

By the way, str is printable with std::cout. Sure, when str is English, SuggestionPupup works fine.

setLocale() is only used for translations (= which message resource bundles will be considered), not for character encoding.

You have to establish the character encoding from that std::string and use the proper method to construct a WString from it. As it comes from the browser, I strongly syspect it to be a UTF-8 string. In that case, you should convert it to a WString by using WString::fromUTF8(...).

Wim.

Wim,

I do have two message files for different language

At the session initiation I apply for one of them:

appInstance_->messageResourceBundle().use("messages_ru");

Late, as user clicked lang ico, I change message file:

appInstance_->messageResourceBundle().use("messages_en");

It seams message file doesn't changed and all messages are from messages_ru.xml

How to flush previously loaded message file?

Hey,

You should make this work like this:

Have your two files:

  messages.xml
  messages_ru.xml

These files will be part of the same message resource bundle:

appInstance_->messageResourceBundle().use("messages");

Then, use setLocale() to configure which one should be used:

setLocale("") or setLocale("en"): messages.xml

setLocale("ru"): messages_ru.xml

So in your lang icon, you should be calling setLocale() instead of appInstance_->messageResourceBundle().use("messages_en");

Regards,

koen