Re: [Interest] Dynamic translations for mobile apps at runtime?

[Jason H]

What if you did "-tr-function-alias qsTr=MySingleton.myqsTr" ? 

 

Sent: Thursday, March 03, 2016 at 5:31 PM
From: "Jérôme Godbout" <jer...@bodycad.com>
To: "Julien Cugnière" <julien.cugni...@gmail.com>
Cc: "interest@qt-project.org" <interest@qt-project.org>
Subject: Re: [Interest] Dynamic translations for mobile apps at runtime?

I test it out, it work as long as the function is a direct function access, you can't use module call like 

 

MySingleton.myqsTr("My String") // don't work, lupdate does get this one

myqsTr("My String") // work

 

Could have put the function into it's own _javascript_ .pragma library and just import it in needed file. Is their a way to declare a global _javascript_ function into the engine with the binding still working? I just don't want to add the function on each file if possible:

 

function myqsTr(str) { return qsTr(str) + I18n.revaluate; }

 

I may try to add the function into the RootItem of the QQuickView and hope the context hierarchies will always find it everywhere to see if this work.

 

That's so close to work well...

 

 

 

On Thu, Mar 3, 2016 at 3:41 PM, Jérôme Godbout <jer...@bodycad.com> wrote:

Nice, I didn't knew about "-tr-function-alias", indeed this seem like the right thing to do. Will try this out. About speed, for the number of time you use the change language during runtime, it doesn't really matter, if it take a few ms more.

 

Thanks for the tips!

 

On Thu, Mar 3, 2016 at 2:37 PM, Julien Cugnière <julien.cugni...@gmail.com> wrote:

2016-03-03 18:50 GMT+01:00 Jérôme Godbout <jer...@bodycad.com>:
> We did the same thing into Qml, we have a C++ singleton equivalent to your
> backend, that select the current language files and emit the QString
> property changed.
> qsTr("String to convert") + I18n.revaluate
>
> I wish they made underlying hook to revaluate the qsTr() with a signal
> connected like if the qsTr() have changed. This pollute the code all over,
> only to be able to swap language on the fly.

Just an idea : you might be able to hide that I18n.revaluate with
something along the lines of :

    function myTr(s) {
        return qsTr(s) + I18n.revaluate;
    }

    Text {
        text: myTr("String to convert")
    }

Then you need to get lupdate to understand "myTr", which can be done
with the command line option "-tr-function-alias qsTr=myTr".

Although this incurs the overhead of a function call, which might
prevent QML from using its fast path for bindings evaluation. Not sure
if it matters.

Julien Cugnière

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