5 releases

0.1.11	~~Sep 2, 2022~~
0.1.7	Sep 8, 2022

#31 in #system-interface

AGPL-3.0-only

12KB
111 lines

QTranslater

This crate is a very small translation system based on Json for QMetaOjbect. It was originally created for the translation of the Grace software(by Cairn Devices).

Goal

Allow simple translation of variables for interfaces that use the qmetaobject crate.

Setup

In your folder project

Create a "lang" folder in your "src" folder. In this "lang" folder create a json file for every languages you want to switch to.

Screenshot

In a Json file

For example in "fr_FR.json"

{
    "water": "eau",
    "battery": "Batterie",
    "trains":"age",
    "global_infos": "Informations générales", 
}

In your rust file

By default, the library will determine the language of your computer using "sys-local::get_local". If the language is not present in the "lang" folder, it will automatically load an "en_GB.json". So please provide an "en_GB.json" file to avoid any crash of your application.

//For example: in my main.rs
//We start with import*
use qmetaobject::prelude::*; 
use qtranslation::QTranslater;

    fn main(){
        /*
        Some code...
        */
        qml_ressources(); 
        qml_register_type::<QTranslater>(cstr!("QTranslater"), 1, 0, cstr!("QTranslater")); //Register the QTranslater type
        let mut engine = QmlEngine::new();
        engine.load_file("qrc:/main/qml/main_window.qml".into()); //"main_window" is just my qml first window.But it can be any other page.
        engine.exec();

    }

In your QML file

QTranslater init() function takes one argument "folder_path" a String. This argument determines the file in which the Qtranslater will look for json files. There are three options :

folder_path = "dev_path" --> in this case the path will be ./src/lang/
folder_path = "installed_path" --> in this case the path will be /home/{username}/.local/share/cairn-grace/lang/
Else, if folder_path is an other path that you choose. For example : "/home/username/Desktop/random_folder/" --> in this cas the path will be equals to folder_path

//Import the QTranslater object
import QTranslater 1.0

ApplicationWindow{
    id:my_window
    visible:true
    width : 800
    height:800

    QTranslater{
        id: lang //Assign an ID you want
        Component.onCompleted: {
            init(installed_path); // it can be "dev_path" or a custom path like the one in the example below
            //init(dev_path);
            //init("/home/username/Desktop/random_folder/")
        }
    }
    //Some code...
    ColumnLayout{
        Text{
            text: lang.dict["global_informations"]
        }
        Text{
            text: lang.dict["water"]
        }
        Text{
            text: lang.dict["battery"] + ": 23
            font.bold: true
        }

        Text{
            textFormat: Text.RichText
            text: "<html><span style='font-weight: bold '>I love</span><span>" +lang.dict.["trains"] +"</span><\html>"
            color: "red"
            font.family: ubuntu_regular.name
        }
        
        Button{
            text: "Change to French"
            onClicked: lang.change_lang("fr_FR") // To change language
        }
    } 
}

Dependencies

~2–15MB
~142K SLoC