[SailfishDevel] Dynamic QML refresh (localization)

[Joona Petrell]

Hi Tamas,

Dynamic translations are tricky thing to accomplish in Qt. There is some support in Qt to accomplish dynamic language change inside a Qt app, but Qt-based platforms are a different story. Currently the work effort of allow language change during runtime for a full platform like Sailfish OS is too large to justify the investment.

Apps normally follow platform system language, which when changed unfortunately currently does a full system reboot (though could be improved to only restart the system UI / desktop environment). If you provided settings in-app to choose different language than the system you might be able to get some kind of dynamic translation setup to work, though if you are using Silica UI components those probably pull in some translations of their own and may not work with the dynamic translation setup.

Br,

Joona

________________________________
From: Devel [devel-bounces at lists.sailfishos.org] on behalf of Андрей Кожевников [coderusinbox at gmail.com]
Sent: 27 May 2019 10:41
To: Sailfish OS Developers
Subject: Re: [SailfishDevel] Dynamic QML refresh (localization)

Hello!

You should not use sailfishapp translations, because you won't be able to uninstall translator for default system language:
https://github.com/sailfishos/libsailfishapp/blob/master/src/sailfishapp_priv.cpp#L107

You can copy prf content to your pro file and install translations to different folder, not translations one, so sailfishapp wont preload default translator
https://github.com/sailfishos/libsailfishapp/blob/master/data/sailfishapp_i18n.prf

вс, 26 мая 2019 г. в 23:39, Tamas Miklos <uusi at freemail.hu<mailto:uusi at freemail.hu>>:
Hi,


Is it possible to dynamically update QML strings after a language change initiated by the user from the Settings page of my app?  In QT there's a QqmlEngine::retranslate() call, but I couldn't find a way to use that from a Sailfish app.  I've found the following page as well, but it seems way too overkill to my liking :)

https://wiki.qt.io/How_to_do_dynamic_translation_in_QML

I've also found some apps to use the PageStack replace trick to refresh an already rendered QML page after language change, but it also seems too quirky to me.

Please let me know what's the best way to achieve a user-friendly way of changing language of my app on-the-fly.


Thanks,
Tamas (author of AIDA64 for Sailfish)

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