如何从数据库加载QTranslator？

Question

There is no way to load QTranslator from my own way. I want to exclude .ts files from architecture of my app. I just want to load my languages from databse, whitch will be update from anywhere. And i don't want to load any files(.ts). Does exists the way somthing like this: QTranslator::load(QStringList)??? QStringList is a language pairs.

Answer 1

The QTranslator::translate method is virtual - which means you can simply create your own translator that extends QTranslator and override this (and one other) method:

class MyTranslator : public QTranslator
{
public:
    MyTranslator(QStringList data, QObject* parent) : 
        QTranslator(parent)
    {
        // ...
    }

    bool isEmpty() const override {
        return false; //or use your own logic to determine if data contains translations
    }

    QString translate(const char *context, const char *sourceText, const char *disambiguation = nullptr, int n = -1) const override {
        // Use the data to somehow find your translation
    }
};

Answer 2

I understand your goal. Why don't you get the data from your database, save it as temporary file, load via QTranslator (regular way), then delete the temporary file?

Another option is maybe the overload for:

bool QTranslator::load(const uchar *data, int len, const QString &directory = QString())

(from: http://doc.qt.io/qt-5/qtranslator.html#load-2 ), which would allow you to load from your own structure without temp file.