QT_TRANSLATE_NOOP inside static const QMap?

Opa114

Hi there,

i have a QMap with some QStrings i want to translate at runtime. So becuase these are static const i have to use QT_TRANSLATE_NOOP() i think - or i'am worng?

I declare and initialize this QMap in one of my Header-Files after the Class-Part.

#ifndef MYCLASS_H
#define MYCLASS_H

#include <QString>
#include <QMap>

class MyClass
{
public:
    MyClass();

private:

};

static const char * const flowers[] = {
    QT_TRANSLATE_NOOP("OrderForm2", "Medium Stem Pink Roses"),
    QT_TRANSLATE_NOOP("OrderForm2", "One Dozen Boxed Roses"),
    QT_TRANSLATE_NOOP("OrderForm2", "Calypso Orchid"),
    QT_TRANSLATE_NOOP("OrderForm2", "Dried Red Rose Bouquet"),
    QT_TRANSLATE_NOOP("OrderForm2", "Mixed Peonies Bouquet"),
    0
};
#endif // MYCLASS_H´

When i run lupdate it found the strings and the i entered the translations for it in QtLinuist and release it. Then i run my Application if tried out the translation but they did not work.
So where is the problem? Thanks in advice!

mrjj

Hi
Yes this marks them for extraction by the lupdate tool.

You need a call to tr() to translate it.

QString FriendlyConversation::greeting(int type)
{
    static const char *greeting_strings[] = {
        QT_TR_NOOP("Hello"),
        QT_TR_NOOP("Goodbye")
    };
    return tr(greeting_strings[type]); <<<<<<< returns via tr()
}

http://doc.qt.io/qt-5/i18n-source-translation.html

Opa114

yes i tried to print it with (for my example above)

for (int i = 0; flowers[i]; ++i)
        qDebug() << tr(flowers[i]);

but i don't get the translated content printed out.

mrjj

How do you load the translation ?
https://wiki.qt.io/How_to_create_a_multi_language_application

Opa114

@mrjj said in QT_TRANSLATE_NOOP inside static const QMap?:

How do you load the translation ?
https://wiki.qt.io/How_to_create_a_multi_language_application

i'm exactly loading the translation this way. It work's very well with my other translations, for example the Menu-Entries or other QLabel on which i directly call tr(VALUE). But not the one i posted. Could it be problemativ because i declare and initialize it outside the class?
But i found no other way to declare and initialize a static const variable.

I did some research and found ouut that:
When i call qDebug() << qApp->translate( "OrderForm2", flowers[0] );
instead of qDebug() << tr(flowers[0]); i got the translated content.

But i did it not work without calling qApp->translate() ?

mrjj

@Opa114
Well you are using it with a context ("OrderForm2")
and the sample for that actually use app trans

static const char *greeting_strings[] = {
    QT_TRANSLATE_NOOP("FriendlyConversation", "Hello"),
    QT_TRANSLATE_NOOP("FriendlyConversation", "Goodbye")
};

QString FriendlyConversation::greeting(int type)
{
    return tr(greeting_strings[type]);
}

QString global_greeting(int type)
{
    return qApp->translate("FriendlyConversation", <<<< context
           greeting_strings[type]);
}

So it could be related to that. ( context)

Opa114

ok it seems so. I tried your other example from the official Qt-Source. But when i declare the greetings_Strings[]-Array outside the class the Strings will not be detectet for translation. I think these are only wokring inside a Class or Method :/

mrjj

@Opa114
Oh, are you saying the greeting_strings sample do not work?
It is not in a class. Mind the context thing. It does matter. :)

Opa114

@mrjj yes. outside a class it is only working with the context stuff and QT_TRANSLATE_NOOP. QT_TR_NOOP only works inside class. So thanks for helping out.

mrjj

@Opa114
Well when not in an object, the context is different, so
I guess that's why to specify one, makes it work.
Well just use what works, it all ends up being the same type
of lookup in a table so TR or qApp->translate should not matter much.

Opa114

@mrjj okay - thanks for help!