[Interest] Call retranslateUi() from UI generated/loaded directly from *.ui

[Nicholas Yue]

I tried enabling setLanguageChangeEnabled(true) but I don't see my label
updating, do I have to write some handler for that event and go through to
update each widget text ? Apologies, I am new to translation.

```

#include "MainWindow.h"

#include <QVBoxLayout>

#include <QDebug>

#include <QUiLoader>

#include <QFile>

#include <QWidget>

#include <QApplication>


MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    QUiLoader loader;

    QFile file(":/designer/mainwindow.ui");

    file.open(QFile::ReadOnly);

    QWidget *widget = loader.load(&file, parent);

    loader.setTranslationEnabled(true);

    file.close();

    setCentralWidget(widget);


    ui_checkBox = findChild<QCheckBox*>("checkBox");

    QObject::connect(ui_checkBox, SIGNAL(clicked()),  this, SLOT(doCheckBox()));

}



void MainWindow::doCheckBox() {

    qDebug() << "doCheckBox() called = " << ui_checkBox->isChecked();

    if (ui_checkBox->isChecked())

    {

        QString langFile = QString(":/language/.qm/mlc_de.qm");

        QTranslator translator;

        if (translator.load(langFile)) {

            qDebug() << "DE Successful";

            bool installed = qApp->installTranslator(&translator);

            if (installed) {

                qDebug() << "DE installed";

            }

        }

        else

        {

            qDebug() << "DE Unsuccessful";

        }

    }

    else

    {

        QString langFile = QString(":/language/.qm/mlc_C.qm");

        QTranslator translator;

        if (translator.load(langFile)) {

            qDebug() << "C Successful";

            bool installed = qApp->installTranslator(&translator);

            if (installed) {

                qDebug() << "C installed";

            }

        }

        else

        {

            qDebug() << "C Unsuccessful";

        }

    }

}

```


On Thu, 29 Apr 2021 at 23:39, Friedemann Kleint <Friedemann.Kleint at qt.io>
wrote:

> Hi,
>
>  >  I am developing an application where I am generating the UI via
> loading the *.ui rather than using uic to generate the source/header file.
>
>  >  I need to call retranslateUi to update my translation but most
> documentation talks about a generated method by uic
>
> It should automatically react to language change events, see:
>
> https://doc.qt.io/qt-6/quiloader.html#setLanguageChangeEnabled
>
> Regards, Friedemann
>
> --
>
> Friedemann Kleint
> The Qt Company GmbH
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://lists.qt-project.org/listinfo/interest
>


-- 
Nicholas Yue
Graphics - Arnold, Alembic, RenderMan, OpenGL, HDF5
Custom Dev - C++ porting, OSX, Linux, Windows
http://au.linkedin.com/in/nicholasyue
https://vimeo.com/channels/naiadtools
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