下载 Qt Creator 源码

Github: https://github.com/qt/qttools
笔记打算用 Qt 5.12.12 来编译 qt creator-linguist
所以笔者下载的是 tag - 5.12.12 ，解压后如下，先删除多余的文件，后续还要删除更多文件方便清晰的查看源码.

添加 header.pri

##指定 QtUiTools/private 所在目录.
INCLUDEPATH += D:/Qt/5.12.12/5.12.12/msvc2017_64/include/QtUiTools
INCLUDEPATH += D:/Qt/5.12.12/5.12.12/msvc2017_64/include/QtUiTools/5.12.12/QtUiTools

手动翻译多语言

在 .pro 中增加多语言, 在 Qt Creator 生成

TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Ch/Ch.ts #英文->中文
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/ChT/ChT.ts #英文->中文繁体
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Japanese/Japanese.ts #英文->日语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Russian/Russian.ts #英文->俄语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/German/German.ts #英文->德语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/French/French.ts #英文->法语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Italian/Italian.ts #英文->意大利语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Polish/Polish.ts #英文->波兰语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Thai/Thai.ts #英文->泰语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Hindi/Hindi.ts #英文->印地语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Indonesian/Indonesian.ts #英文->印尼语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Spanish/Spanish.ts #英文->西班牙语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Portuguese/Portuguese.ts #英文->葡萄牙语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Korean/Korean.ts #英文->朝鲜语
TRANSLATIONS += $$PWD/bin/release/msvc_x64/appInfo/setting/Vietnamese/Vietnamese.ts #英文->越南语

更新翻译: 更新.ts 文件
发布翻译: 把 .ts 文件生成 .qm 文件，最终利用 QTranslator 类完成界面上显示的翻译.
文件->打开 .ts 文件

自动翻译多语言

.ts 格式， 表示未翻译

直接翻译.ts 文件的核心代码

bool LinguistDlg::translateTsFileUnfinished(const QString & strSrc,const QString & strDest,
                                            const QString &sourceLanguage,const QString &targetLanguage)
{
    QDomDocument doc;
    QString errorMsg;
    int errorLine = 0;
    int errorColumn = 0;
    {
        QFile iFile(strSrc);
        if(!iFile.open(QIODevice::ReadOnly)){
            setLastError(tr("Open file failed:%1").arg(iFile.errorString()));
            return false;
        }
        QByteArray baContent = iFile.readAll();
        bool bPase = doc.setContent(baContent,&errorMsg,&errorLine,&errorColumn);
        if(!bPase){
            setLastError(tr("Parser failed:[line:%1 column:%2]:%3").arg(errorLine).arg(errorColumn).arg(errorMsg));
            return false;
        }
        iFile.close();
    }
    QVariantMap map;
    map["source_language"] = sourceLanguage;
    map["target_language"] = targetLanguage;
    SCDebug<<"sourceLanguage:"<<sourceLanguage;
    SCDebug<<"targetLanguage:"<<targetLanguage;
    //自定义术语表，这里把 %1 ~ %9 不让飞书翻译.
    QVariantList glossary;
    for(int k=0; k<10; ++k){
        QVariantMap cMap;
        cMap.insert("from",QString("%%1").arg(k));
        cMap.insert("to",QString("%%1").arg(k));
        glossary.append(cMap);
    }
    //!!!Fix <message numerus=yes>标记为数字，如果不为数字则报错.
    map["glossary"] = glossary;
    QDomElement elemntTS = doc.elementsByTagName("TS").at(0).toElement();
    QDomNodeList nlContexts = elemntTS.elementsByTagName("context");
    int maxValue = nlContexts.count();
    for(int i=0;i<nlContexts.count(); i++){
        UiClass::init()->showWaittingWidget(tr("Translating...(%1/%2)").arg(i).arg(maxValue),this);
        QDomNode nodeContext = nlContexts.at(i);
        QDomNodeList nlMessages = nodeContext.toElement().elementsByTagName("message");
        for(int j=0;j<nlMessages.count(); ++j){
            QDomNode nodeMessage = nlMessages.at(j);

            QDomElement elementTranslation = nodeMessage.firstChildElement("translation");
            QString type = elementTranslation.attribute("type");
            if ("unfinished" == type){//未翻译的
                //nodeMessage.removeChild(elementTranslation);
                QDomElement elementSource = nodeMessage.firstChildElement("source");
                QDomElement elementLocation = nodeMessage.firstChildElement("location");
                map["text"] = elementSource.text();
                if(!_httpApiTr.translate(map)){
                    SCWarning<<"Error:elementLocation:"<<elementLocation.attribute("filename")<<map["text"].toString();
                    continue;
                }
                auto translate_text = map.value("translate_text").toString();
                //这里一定要先删除旧的再追加新的，否则无效.
                elementTranslation.removeAttribute("type");
                elementTranslation.removeChild(elementTranslation.firstChild());
                auto nodeText = doc.createTextNode(translate_text);
                elementTranslation.appendChild(nodeText);
                //SCDebug<<"Sucess:elementLocation:"<<elementLocation.attribute("filename")<<map["text"].toString()<<translate_text;
            }
        }
    }
    {
        QFile iFileWrite(strDest);
        if( !iFileWrite.open(QIODevice::WriteOnly)){
            setLastError(tr("Open file failed:%1").arg(iFileWrite.errorString()));
            return false;
        }
        iFileWrite.write(doc.toByteArray());
        iFileWrite.close();
    }
    return true;
}