How can my program have 2 languages?
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You should read documentations carefully and you will have no problem.
In case that you couldn't managed to do the stuff, do these:
1- In your qt project file (.pro) add this line:
@TRANSLATIONS += program_gr.ts@
Of course names and number of translations are optional.2- start lupdate tool (which is an executable installed with Qt SDK) given your project file name. for example:
@
lupdate ./program.pro
@
this scans your source code tree and determines translatable strings, then generates a XML-based translation file. in above example generates program_gr.ts.3- Now you can perform actual translation! open your translation file with Qt Linguist and translate strings. then save the file and exit. It's easy !
4- Now that you have translated strings, you should make binary translation file. just call lrealease and give your ts file name:
@
lrealease program_gr.ts
@
this will generate profram_gr.qm that you can load in your program.5- when application starts, load your qm file using QTranslator class. in a widget-based application it may look like this:
@
#include <QtGui/QApplication>
#include <QTranslator>
#include "mainwindow.h"int main(int argc, char argv[])
{
QApplication a(argc, argv);
QTranslator translator;
translator->load(a.applicationDirPath()+"/program_gr.qm"); // or other place that you put your .qm file
a.installTranslator(translator);
MainWindow w;
w.show();
return a.exec();
}
@note that you can load translations dynamically and use them whenever you need. but you should be careful about calling translation method for all of dialogs.
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Basically i saw a tutorial here ( http://www.youtube.com/watch?v=V9Gep6-r8ns ). It is the same with yours except that i can't understant what the guy is saying at Indonesia language..
Also at step 5 i have this
@QTranslator translator;
translator.load("program_gr");
a.installTranslator(&translator);@Ok so i create the gm file. BUT. As i said my program is for Ubuntu so i will make a deb file ( like setup.exe files at Windows.. ).. How can i provide the greek translation file and how after the program is installed users can translate the app to greek? ( Install my greek translation file so they can see the app translated at greek )
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Ok, it looks like an "Installation and Deployment" problem...
In linux directories used for configuration files are:
/etc/program and /home/user_name/.program and /usr/share/program/Due to linux file system standards I suggest put your translation files in /usr/share/program/translations.
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[quote author="Leon" date="1309285305"]The translations at /usr/share/program/translations must be at .ts format or .qm format?[/quote]
You need only qm files in runtime. ts files are used to translate. at runtime you want to load translated data.
Also notice that there is no magic with /usr/share/program/translations. that was just a suggestion. you could put your translations in every other location... -
I am thinking of having english greek dutch and french language at my program.. Should i have a combobox with this 4 languages only ( using the resource file) or should i check for file existences at the path that i have my translations and then add them to the combobox?
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Hello again! What do you suggest? After the language has been changed ( at a combobox probably ) instantly everything change to the language you selected with "this way":http://developer.qt.nokia.com/faq/answer/how_can_i_dynamically_switch_between_languages_in_my_application_using_e.g_ or change the language after you restart the application?
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What I did was this:
1- Create a proxy subclass of QDialog named ProxyDialog wich have only one method: retranslateUI()
2- Subclass all dialogs from ProxyDialog
3- When you need to translate UI, just iterate over children of type ProxyDialog* and call retranslate UI for all of them. this is possible using findChildren function. -
Yes. I'm not sure if there is a better way or not, but I looked around a lot and couldn't fount anything.
This works well for my applications.
You don't have to restart your application to see translation results. All open dialogs will be translated on-the-fly.