Internationalisation of Application at run time.

[Pardeep]

Hello Everyone,

I have an application in English. Now i want that user can change language at run time.
I do that with help of QTranslater,but after install translater i need to retranslate ui.

Is there any which a can change langauge at run time without retranslating ui.


Best Regards
Pardeep Sharma

[StrikeByte]

What do you mean by changing language without retranslating the ui?

I use this to translate at runtime:

void MainWindow::changeEvent(QEvent* event)
{
   if (event->type() == QEvent::LanguageChange)
   {
       // retranslate designer form
       ui->retranslateUi(this);
 
       // retranslate other widgets which weren't added in designer
       retranslate();
   }
 
   // remember to call base class implementation
   QMainWindow::changeEvent(event);
}

void MainWindow::changeEvent(QEvent* event)
{
   if (event->type() == QEvent::LanguageChange)
   {
       // retranslate designer form
       ui->retranslateUi(this);

       // retranslate other widgets which weren't added in designer
       retranslate();
   }

   // remember to call base class implementation
   QMainWindow::changeEvent(event);
}

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[sonulohani]

What do you mean by changing language without retranslating the ui?

It means the ui->retranslateUi(this); that you're calling. That what he don't want to call in his program.

[StrikeByte]

If that is the case then the answer is no there is no other option

[Pardeep]

Thanks for your reply.

In my application there is scenario where pushbutton have different text depending upon situation.

I mean to say initially push button have text(say "Hello") & after clicking them its text will be change(say "Bye"),then how to handle this .

And in re-translation of ui we set initial text of widget. If user change language after clicking button then what to do??

[sonulohani]

Yup that you can also do from this.
Check for the returned text like this ;-

if(ui->pushButton->text() == "Hello")
    <Set the hello translation code here>
else
    <Set the bye translation code here>

if(ui->pushButton->text() == "Hello")
    <Set the hello translation code here>
else
    <Set the bye translation code here>

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Write it in separate method and call it from the changeEvent().

[Pardeep]

Sonulohani thanks for your valuable help.

Tell me one more thing is there any why by which i can define all string used by widgets to display text, in seperate file. & At any time if user want to change string he/she can easily can change string from that file & that string reflect changes in both .ts & .qm file automatically in application & there is no need to run lupdate & irelease again??

[sonulohani]

That i think is not possible cause for translation it always load qm file. Or use QLocale instead.