QTranslator - translate defines in headers

[pVit]

Hello,
how could I translate defines in headers?

• tr("text") is not available in .h files
• QT_TR_NOOP("text") and QT_TRANSLATE_NOOP("source", "text") adds text for translate to .ts file but it doesn't take translated text from .qm file
• tr(DEFINED_TEXT_IN_HEADER) in .cpp doesn't work

Do you know how to do that?
Thanks

[VRonin]

Can you post your .h file?
is it a QObject derived class?
did you include Q_OBJECT?

[raven-worx]

@pVit
also make sure that the translator is installed before the tr() methods are called.
If it is (re-)installed later, you need to make sure you reassign all the strings using the tr() method again.

[pVit]

I have class texts, there are defines I need to translate:

// texts.h ------------------------------------------------------------------------------------------
#ifndef TEXTS_H
#define TEXTS_H

#include <QObject>

class QLabel;
class texts : public QObject
{
Q_OBJECT

#define MONDAY tr("Monday")
#define TUESDAY tr("Tuesday")
#define WEDNESDAY tr("Wednesday")

public:
explicit texts(QObject *parent = 0);
~texts();
void setText(QLabel *label);
};
#endif // TEXTS_H

// texts.cpp ------------------------------------------------------------------------------------------
#include "texts.h"
#include <QDebug>
#include <QLabel>

texts::texts(QObject *parent) : QObject(parent){}
texts::~texts(){}
void texts::setText(QLabel *label)
{
label->setText(MONDAY);
}

// mainwindow ------------------------------------------------------------------------------------------
void MainWindow::on_pushButtoncz_clicked()
{
setLanguage(lang_CZ);
m_pTexts->setText(ui->label_pondeli); -------> works well
ui->label_utery->setText(MONDAY); -------> doesn´t work
}

It looks like problem is that translations in .qm / .ts files are classified by class names and works only in specific classes, not works at all.

[micland]

@pVit

In your example the macro gets expanded in the context of MainWindow so you're calling MainWindow::tr(...) instead of texts::tr(...). This requires a separate translation.
But the method is static so it should work when adjusting the macros as followed:

#define MONDAY texts::tr("Monday")
#define TUESDAY texts::tr("Tuesday")
#define WEDNESDAY texts::tr("Wednesday")

[pVit]

@micland
Thanks a lot! It's working now.

[VRonin]

Just a note, if those are just days of the week, you can use QDate(2016,10,10).toString(QStringLiteral("dddd")). this will be the day of the week (Monday in this case as 2016-10-10 is a monday) automatically translated to the target locale, no need for manual translations.

[pVit]

@VRonin
Thanks for info but these words were only examples, I have many more defines :)