Unicode Problem..

ahura_24

hi everybody. i want use unicode in qt Creator my code is

@
#include <QtGui>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QPushButton btn( QString::fromUtf8("بستن") ); // unicode
btn.show();

return app.exec&#40;&#41;;

}
@

its right in qt creator but when i run project this unicode will be shown ambigues font !

mlong

Does the default font that is being used to display the text on your OS when you run the app support those characters?

ahura_24

yes . my windows is 7 64bit and set to region and language -> language for non-unicode program to this language.

dbzhang800

Are you sure the following code
@
char str[] = "بستن";
@
will get utf8 encoded bytes of "بستن"?

First, your source code should be saved as utf8 with BOM.

Then add following lines to your souce code.（If you are using MSVC2010）
@
#ifdef Q_CC_MSVC
#pragma execution_character_set("UTF-8")
#endif
@

If you are using MinGW, nothing special need to do.(with or without BOM)

If you are using MSVC2005 or MSVC2008, I don't know how to do.

If you are using MSVC2003, save source code as utf8 without BOM should works.

....

ahura_24

i use visual 2008 pro sp1. yes im sure encoded bytes of "بستن". i try to use mingw but i cant download it and i dont know how i must to use mingw or set qt option to use it ! if you know please help me.

dbzhang800

Hi,

IMO, this is pure C++ problem.

If you are not sure that the execution_character_set of your compile environment is utf8, you can give a try to

@
char str[] = "\xd8\xa8\xd8\xb3\xd8\xaa\xd9\x86"; //I don't know whether it is the right utf8 bytes ;-)
QString::fromUtf8(str);
@

instead of
@
char str[] = "بستن";
QString::fromUtf8(str);
@

The formal will works in all the compilers, while the latter will depend on which compiler you choose.

I do not know how to make the latter works under MSVC2005 or MSVC2008. In fact, I can not achieve this using Chinese-Version-of-MSVC2008. that's why MSVC2010 support

@
#pragma execution_character_set
@

In addition, if your compile support C++11, you can write

@
char str[] = u8"بستن";
QString::fromUtf8(str);
@

MuldeR

Maybe:

@QPushButton btn( QString:::fromWCharArray(L"بستن") );@
@QPushButton btn( QString::fromUtf16((const ushort*) L"بستن") );@

dbzhang800

Yes, wchar_t is good option before compilers providing full support for char16_t and char32_t .

dbzhang800

If fact, QStringLiteral can be used under Qt5.

@
QString str = QStringLiteral("بستن");
@

depend on which compiler used, it will use

@
char16_t* & u"بستن"
@
or
@
wchar_t* & L"بستن"
@
or
@
ushort*
@
or
@
char*
@

ahura_24

tnx every body for your help