tr with #define..it can work?

[mattia]

Hello, im my default.h i put:


#define aString "aString";

if i want to use aString as a QString in my project i used to do in this way


...
QString ( aString )
...

but if i want internazionalizzate it with "tr()" function what should i do?
i tried with tr


tr ( QString ( aString ) )

but i get this error


main.cpp:4396: error: no matching function for call to ‘main::tr(QString)’


thx

[marcel]

The tr signature is QObject::tr ( const char * sourceText, const char * comment = 0, int n = -1 ) .
So you can just pass aString:


QString translated = tr(aString);

[mattia]

good, now i don't get any error...but i did
lupdate project.pro
lrelease project.pro
i can't find the voice in my .ts file...

[bender86]

From http://doc.trolltech.com/4.3/i18n.html#use-tr-for-all-literal-text:

If you need to have translatable text completely outside a function, there are two macros to help: QT_TR_NOOP() and QT_TRANSLATE_NOOP(). They merely mark the text for extraction by the lupdate utility described below. The macros expand to just the text (without the context).

[Gopala Krishna]

Why don't you do it this way ?

const QString astring = QObject::tr("astring"); // global or wrapped in singleton class

[mattia]

Why don't you do it this way ?

const QString astring = QObject::tr("astring"); // global or wrapped in singleton class
in this way i get a error

error: ‘QString’ does not name a type

[jpn]

in this way i get a error

error: ‘QString’ does not name a type
Did you include <QString>?

Btw, bender86 already pointed out the correct way to do it if you insist using defines.

[mattia]

Hi, i did as bender86 suggest, i added in my default.h this:

static const char *greeting_string = QT_TR_NOOP("Hellooooo");
and in my*ts file i translated greeting_string,


<message>
<location filename="../default.h" line="47"/>
<source>Hellooooo</source>
<translation>Ciaooooooooooooooo</translation>
</message>

but when i call tr(greeting_string) in my application i'm not able to see greeting_string translated...I can just read "Hellooooo".
With other QString in my application i I have not problem to see them translated.
Any hint?
thx

[jpn]

You must use QT_TRANSLATE_NOOP() outside class context. QT_TR_NOOP() is used inside class context.

[mattia]

thanks so much now it correctly works, but when i compile my application i keep having this annoying massage:

default.h:48: warning: ‘greeting_string’ defined but not used
greeting_string is declared in this wy:

static const char *greeting_string = QT_TRANSLATE_NOOP( "mainWindow" , "Hello" );
and it's used in mainWindow.
thx