convert from irrlicht to qt

[YankzzDev]

hi all...

i try to make a qt project using irrlicht engine now

i want to ask about converting string from irrlicht to qt

if irrlicht declation string is like this :

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core::stringw MessageText;
MessageText = "Test Message";
 

and qt declation string is like this:

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QString str;
 

and i try to combine 2 string and i test it like that:

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str = MessageText;
 

but it's failed...

and got this error..

Error 41 error C2664: 'QLineEdit::setText' : cannot convert parameter 1 from 'irr::core::stringw' to 'const QString &'


any solution?

i am apologize if my question is very naive or other...

because i am a beginner...


Regard's


Yanto Chen

[Josh1billion]

I haven't used Qt before, but I would imagine you could do something like this:

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str = MessageText.c_str();

[YankzzDev]

I haven't used Qt before, but I would imagine you could do something like this:

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str = MessageText.c_str();

it's failed and produced this error:

Error 41 error C3867: 'irr::core::string<T>::c_str': function call missing argument list; use '&irr::core::string<T>::c_str' to create a pointer to member

[hybrid]

Are you sure that you did not forget the parantheses after c_str() <-- these ones?!

[YankzzDev]

Are you sure that you did not forget the parantheses after c_str() <-- these ones?!

yeah, i try put it and produced this error:


Error 41 error C2440: '=' : cannot convert from 'const wchar_t *' to 'QString *'

[CuteAlien]

It seems QString does not support wide-strings. They use some 8-bit unicode, so I guess it's UTF-8. The easy way is copying wide-char into char strings (for example with core::stringc(MessageText) - the stringc constructor will do that). The disadvantage is that this will not work with internationalization - meaning it only works if the wide-chars contain nothing but ascii. The clean way is doing a real conversion from wide-char to unicode, search here for the convert_utf files for a conversion doing that: http://www.michaelzeilfelder.de/irrlich ... tringTable

[aanderse]

i want to ask about converting string from irrlicht to qt

you are looking for this: http://doc.qt.nokia.com/4.7/qstring.html#fromWCharArray

you would use it like this:

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core::stringw s1 = L"my string!";
QString s2 = QString::fromWCharArray (s1.c_str ());
 

It seems QString does not support wide-strings. They use some 8-bit unicode, so I guess it's UTF-8.

hmm... not sure where you picked that up? QString is a fantastic string class and it certainly is NOT utf8 (though it can handle utf8)

The QString class provides a Unicode character string.
QString stores a string of 16-bit QChars, where each QChar corresponds one Unicode 4.0 character. (Unicode characters with code values above 65535 are stored using surrogate pairs, i.e., two consecutive QChars.)

please don't be shy to use the qt documentation, it is fantastic and full of great examples, tutorials, etc...

[CuteAlien]

Oops, sorry I just did a quick-check this morning for the QString constructor and stopped reading after "char* Constructs a string initialized with the 8-bit string str. The given const char pointer is converted to Unicode using the fromAscii() function." Didn't see all the other constructors *shame*