Home » U++ Library support » U++ Libraries and TheIDE: i18n, Unicode and Internationalization » How to display Traditional Chinese (Big-5)?
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| Re: How to display Traditional Chinese (Big-5)? [message #3759 is a reply to message #3743] |
Fri, 23 June 2006 03:04   |
yoco
Messages: 25
Registered: June 2006
Location: Taiwan
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Promising Member |
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Thank you for your reply 
After read lots of documents and traced lots of source code,
Finally I display Chinese successfully.
The "Big5" is the name of a Charset Encoding,
just like "WIN1250" is a name of a charset encoding. In Taiwan,
"Big5" is the encoding that most people using.
http://en.wikipedia.org/wiki/Big5
After read the cource code,
I know Upp havn't support Big5 yet,
So I saved my text file as UTF-8,
But I still can't display Chinese correct.
After tracing into the source codes of Upp, I found that,
in the function Draw::DrawText() in Draw.cpp,
it send a CHARSET_DEFAULT to function TextUnicode() as a charset parameter,
but the charset in my file is UTF-8.
So the function TextUnicode() can't convert the UTF-8 to wchar in the right way.
And ExtTextOutW() does not get the right wchar string.
So I modify the definition of CHARSET_DEFAULT from 0 to 255 in Charset.h, and it WORKS!
The Chinese display correctly.
I don't know is that the right way to do?
or I just missed some instruction in the manual which I should known at first?
Is there are any "official" way to change the default charset?
--
Sorry about my poor English O_O
[Updated on: Fri, 23 June 2006 03:09] Report message to a moderator |
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| Re: How to display Traditional Chinese (Big-5)? [message #3771 is a reply to message #3760] |
Fri, 23 June 2006 19:35 |
yoco
Messages: 25
Registered: June 2006
Location: Taiwan
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Promising Member |
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No, I didn't.
I didn't know that I can set default charset by this function.
Thank you for tell me that
Is it on the manual already? (I mean user can set default charset through this function.)
I have another problem.
Since the upp does not support Big5,
so I decide to use UNICODE in my application.
I set default charset to CHARSET_UNICODE in the beginning of the program.
And save my text file in UNICODE,
But it display my UNICODE text fall.
========================================================
My code..
class test : public WithtestLayout<TopWindow>
{
public:
typedef test CLASSNAME;
String s ;
test()
{
FileIn fin ( "test.txt" ) ; // In unicode format
s = fin.GetLine() ;
}
virtual void Paint(Draw& w)
{
w.DrawRect(GetSize(), SWhite);
w.DrawText( 0, 0, s, Arial(16), Black);
}
};
========================================================
I found that the definition of CHARSET_UNICODE and CHARSET_UFT8 are both 255,
so in the function
WString ToUnicode(const char *src, int l, byte charset){
charset = ResolveCharset(charset);
if(charset == CHARSET_UTF8)
return FromUtf8(src, l);
WStringBuffer result(l);
ToUnicode(result, src, l, charset);
return result;
}
it always pass the string to the function FromUtf8(),
but the original string read from the file is UNICODE already.
Do I must save my text file in UTF-8?
Thanks.
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| Re: How to display Traditional Chinese (Big-5)? [message #3772 is a reply to message #3771] |
Fri, 23 June 2006 19:57 |
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mirek
Messages: 14271
Registered: November 2005
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Ultimate Member |
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| yoco wrote on Fri, 23 June 2006 13:35 |
No, I didn't.
I didn't know that I can set default charset by this function.
Thank you for tell me that
Is it on the manual already? (I mean user can set default charset through this function.)
I have another problem.
Since the upp does not support Big5,
so I decide to use UNICODE in my application.
I set default charset to CHARSET_UNICODE in the beginning of the program.
And save my text file in UNICODE,
But it display my UNICODE text fall.
========================================================
My code..
class test : public WithtestLayout<TopWindow>
{
public:
typedef test CLASSNAME;
String s ;
test()
{
FileIn fin ( "test.txt" ) ; // In unicode format
s = fin.GetLine() ;
}
virtual void Paint(Draw& w)
{
w.DrawRect(GetSize(), SWhite);
w.DrawText( 0, 0, s, Arial(16), Black);
}
};
========================================================
I found that the definition of CHARSET_UNICODE and CHARSET_UFT8 are both 255,
so in the function
WString ToUnicode(const char *src, int l, byte charset){
charset = ResolveCharset(charset);
if(charset == CHARSET_UTF8)
return FromUtf8(src, l);
WStringBuffer result(l);
ToUnicode(result, src, l, charset);
return result;
}
it always pass the string to the function FromUtf8(),
but the original string read from the file is UNICODE already.
Do I must save my text file in UTF-8?
Thanks.
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Files in U++ are considered to be the stream of bytes.
To read 16-bit unicode file, you should read individual words. Use Get16le (or Get16be for big-endian files) to read individual characters.
Of course, UTF-8 is possible and good alternative. However, while UTF-8 is great for latin alphabets, it is less ideal for chinesse - in latin languages, UTF-8 can reduce the size of file (because most characters are from basic ASCII set and therefore represented by single), while for chinesse you end with 3-byte combos.
Mirek
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