QDialog content not being translated

[J.Hilk]

hi @Jayant and welcome
if you're using the default Qt Dialogs, and you want those translated as well, than I suggest loading, besides your own translation file, also the translation file from Qt Lib/Module.

You'll find those under
/Path/to/Qt/Version/(platform or compiler, for example)clang_64/translations

[Jayant]

Hi @J-Hilk I am not using default Qt Dialogs. I am using custom dialogs with extend the QDialog class and having a ui file.

[Pablo J. Rogina]

@Jayant you may want to override the languageChange() method in your custom dialog class. Something like this (pseudo-code):

/**
 * Handles the event about language changed.
 * Retranslate all applicable strings.
 *
 */
void
YourDialog::languageChange()
{
    ui->retranslateUi(this);
    this->setWindowTitle(tr(Confirm Action");
    // Change label of default Ok button to "Remove"
    ui->buttonBox->button(QDialogButtonBox::Ok)->setText(tr("Remove"));
}

[Jayant]

Hi @Pablo-J-Rogina thanks for your reply, tried this but nothing happens.

[JonB]

@Jayant
Sorry to butt in, but: are you using tr("...") like @Pablo-J-Rogina shows? In which case, I would have thought dialogs/menus/whatever is irrelevant, tr() is tr() and either works or does not regardless of where it happens to be called from?

[Jayant]

@JonB
Yes ofcourse here's my code

void Dialog::changeEvent(QEvent *e){
    if (e->type() == QEvent::LanguageChange) {
        ui->retranslateUi(this);
        setWindowTitle(tr("Test Modal Dialog"));
        ui->label->setText(tr("this is a label"));
    } else {
        QWidget::changeEvent(e);
    }
}

[JonB]

@Jayant
Well, start by verifying (that this code is hit and) what the tr("...")s here are actually returning, rather than setting text from them.

Also, I don't know, but after your code in the LanguageChange case, do you need to still call the base QWidget::changeEvent(e); to let it process? (EDIT OK, I see the examples in the docs.) And why are you calling QWidget::changeEvent() instead of QDialog::changeEvent()?

[Jayant]

@JonB
Change QWidget::changeEvent(e) to QDialog::changeEvent(e) but nothing happens

[JonB]

@Jayant
What are the tr("...")s returning?
And please just confirm your method is being hit, for all we know it might not be?

[Jayant]

@JonB
You are right this function is not being hit.

[JonB]

@Jayant
Which is why I asked you that twice! Suggest always verify a function is being hit if you put code into it! :)

[J.Hilk]

@Jayant that's obvious, as the Dialogs are created on the fly during run.

But if the translations exist, and the translation is loaded correctly, then the new created widget/dialog will also show the appropriate translated text.

You should show some more of your code, and double check that the translation really exists and is the correct one (assigned to the correct source code)

[Jayant]

@J-Hilk
Translation is loaded correctly because the mainwindow shows up the translated text but the dialog class doesn't. Following code translates the text

QCheckBox *checkBox = qobject_cast<QCheckBox *>(sender());
    MainWindow *window = mainWindowForCheckBoxMap[checkBox];
    if (!window) {
        QTranslator translator;
        translator.load(qmFileForCheckBoxMap[checkBox]);
        qApp->installTranslator(&translator);

        window = new MainWindow;
        window->setPalette(colorForLanguage(checkBox->text()));

        window->installEventFilter(this);
        mainWindowForCheckBoxMap.insert(checkBox, window);
    }
    window->setVisible(checkBox->isChecked());

[J.Hilk]

@Jayant
not quite what I had in mind,
Your dialogs, and how they get their text

Translation is loaded correctly because the mainwindow shows up the translated text but the dialog class doesn't. Following code translates the text

I was rather asking if you checked that the translatable strings for your dialog where in your *qm file and correctly assigned.