store language selection in settings file; add translation help functions in util.h/.cpp

ChangeLog

@@ -20,6 +20,9 @@
 - bug fix: grouping faders in the client should be proportional (see discussion in #202, #419)
 
 
+TODO add support to change language (#297)
+     TODO add language selector also in the server GUI
+
 TODO bug fix: incorrect selection of UI language (#408) !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      -> note that for the 3.5.8 bug fix release we went back to the original translation code (e.g. no pt_BR!)
 
@@ -28,6 +31,7 @@ TODO add new register message which contains version and, e.g., max number of cl
 TODO Inconsistency between Input meter and Audio mixer meter #423
 
 TODO improve settings management -> move settings class in client/server classes, move actual settings variables
+TODO store recorder settings (#313)
 
 
 

src/main.cpp

@@ -25,8 +25,6 @@
 #include <QCoreApplication>
 #include <QDir>
 #include <QTextStream>
-#include <QTranslator>
-#include <QLibraryInfo>
 #include "global.h"
 #ifndef HEADLESS
 # include <QApplication>
@@ -582,23 +580,6 @@ int main ( int argc, char** argv )
     // init resources
     Q_INIT_RESOURCE(resources);
 
-    // load translations
-    QTranslator myappTranslator, myqtTranslator;
-
-    if ( bUseGUI && bUseTranslation )
-    {
-        if ( myappTranslator.load ( QLocale(), "translation", "_", ":/translations" ) )
-        {
-            pApp->installTranslator ( &myappTranslator );
-        }
-
-        // allows the Qt messages to be translated in the application
-        if ( myqtTranslator.load ( QLocale(), "qt", "_", QLibraryInfo::location ( QLibraryInfo::TranslationsPath ) ) )
-        {
-            pApp->installTranslator ( &myqtTranslator );
-        }
-    }
-
 
 // TEST -> activate the following line to activate the test bench,
 //CTestbench Testbench ( "127.0.0.1", DEFAULT_PORT_NUMBER );
@@ -620,6 +601,12 @@ int main ( int argc, char** argv )
             CClientSettings Settings ( &Client, strIniFileName );
             Settings.Load();
 
+            // load translation
+            if ( bUseGUI && bUseTranslation )
+            {
+                CLocale::LoadTranslation ( Settings.strLanguage, pApp );
+            }
+
 #ifndef HEADLESS
             if ( bUseGUI )
             {
@@ -673,6 +660,12 @@ int main ( int argc, char** argv )
                 CServerSettings Settings ( &Server, strIniFileName );
                 Settings.Load();
 
+                // load translation
+                if ( bUseGUI && bUseTranslation )
+                {
+                    CLocale::LoadTranslation ( Settings.strLanguage, pApp );
+                }
+
                 // update server list AFTER restoring the settings from the
                 // settings file
                 Server.UpdateServerList();

src/resources.qrc

@@ -1,54 +1,30 @@
 <RCC>
     <qresource prefix="/translations">
-        <file alias="translation_de_DE.qm">res/translation/translation_de_DE.qm</file>
+        <file alias="translation_de">res/translation/translation_de_DE.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_de.qm">res/translation/translation_de_DE.qm</file>
+        <file alias="translation_fr">res/translation/translation_fr_FR.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_fr_FR.qm">res/translation/translation_fr_FR.qm</file>
+        <file alias="translation_pt_PT">res/translation/translation_pt_PT.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_fr.qm">res/translation/translation_fr_FR.qm</file>
+        <file alias="translation_pt">res/translation/translation_pt_BR.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_pt_PT.qm">res/translation/translation_pt_PT.qm</file>
+        <file alias="translation_es">res/translation/translation_es_ES.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_pt_BR.qm">res/translation/translation_pt_BR.qm</file>
+        <file alias="translation_nl">res/translation/translation_nl_NL.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_pt.qm">res/translation/translation_pt_PT.qm</file>
+        <file alias="translation_it">res/translation/translation_it_IT.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_es_ES.qm">res/translation/translation_es_ES.qm</file>
+        <file alias="translation_pl">res/translation/translation_pl_PL.qm</file>
     </qresource>
     <qresource prefix="/translations">
-        <file alias="translation_es.qm">res/translation/translation_es_ES.qm</file>
+        <file alias="translation_sv">res/translation/translation_sv_SE.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_nl_NL.qm">res/translation/translation_nl_NL.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_nl.qm">res/translation/translation_nl_NL.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_it_IT.qm">res/translation/translation_it_IT.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_it.qm">res/translation/translation_it_IT.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_pl_PL.qm">res/translation/translation_pl_PL.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_pl.qm">res/translation/translation_pl_PL.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_sv_SE.qm">res/translation/translation_sv_SE.qm</file>
-    </qresource>
-    <qresource prefix="/translations">
-        <file alias="translation_sv.qm">res/translation/translation_sv_SE.qm</file>
     </qresource>
 
     <qresource prefix="/png/LEDs">

src/settings.cpp

@@ -303,6 +303,10 @@ void CClientSettings::ReadFromXML ( const QDomDocument& IniXMLDocument )
         bConnectDlgShowAllMusicians = bValue;
     }
 
+    // language
+    strLanguage = GetIniSetting ( IniXMLDocument, "client", "language",
+                                  CLocale::FindSysLangTransFileName ( CLocale::GetAvailableTranslations() ).first );
+
     // name
     pClient->ChannelInfo.strName = FromBase64ToString (
         GetIniSetting ( IniXMLDocument, "client", "name_base64",
@@ -613,6 +617,10 @@ void CClientSettings::WriteToXML ( QDomDocument& IniXMLDocument )
     SetFlagIniSet ( IniXMLDocument, "client", "connectdlgshowallmusicians",
         bConnectDlgShowAllMusicians );
 
+    // language
+    PutIniSetting ( IniXMLDocument, "client", "language",
+        strLanguage );
+
     // name
     PutIniSetting ( IniXMLDocument, "client", "name_base64",
         ToBase64 ( pClient->ChannelInfo.strName ) );
@@ -787,6 +795,10 @@ if ( GetFlagIniSet ( IniXMLDocument, "server", "defcentservaddr", bValue ) )
         pServer->SetServerListEnabled ( bValue );
     }
 
+    // language
+    strLanguage = GetIniSetting ( IniXMLDocument, "server", "language",
+                                  CLocale::FindSysLangTransFileName ( CLocale::GetAvailableTranslations() ).first );
+
     // name
     pServer->SetServerName ( GetIniSetting ( IniXMLDocument, "server", "name" ) );
 
@@ -832,6 +844,10 @@ void CServerSettings::WriteToXML ( QDomDocument& IniXMLDocument )
     SetFlagIniSet ( IniXMLDocument, "server", "servlistenabled",
         pServer->GetServerListEnabled() );
 
+    // language
+    PutIniSetting ( IniXMLDocument, "server", "language",
+        strLanguage );
+
     // name
     PutIniSetting ( IniXMLDocument, "server", "name",
         pServer->GetServerName() );

src/settings.h

@@ -120,6 +120,7 @@ public:
         vstrIPAddress               ( MAX_NUM_SERVER_ADDR_ITEMS, "" ),
         iNewClientFaderLevel        ( 100 ),
         bConnectDlgShowAllMusicians ( true ),
+        strLanguage                 ( "" ),
         vecWindowPosMain            ( ), // empty array
         vecWindowPosSettings        ( ), // empty array
         vecWindowPosChat            ( ), // empty array
@@ -141,6 +142,7 @@ public:
     CVector<QString> vstrIPAddress;
     int              iNewClientFaderLevel;
     bool             bConnectDlgShowAllMusicians;
+    QString          strLanguage;
 
     // window position/state settings
     QByteArray vecWindowPosMain;
@@ -165,10 +167,13 @@ class CServerSettings : public CSettings
 {
 public:
     CServerSettings ( CServer* pNSerP, const QString& sNFiName ) :
+        strLanguage      ( "" ),
         vecWindowPosMain ( ), // empty array
         pServer          ( pNSerP )
         { SetFileName ( sNFiName, DEFAULT_INI_FILE_NAME_SERVER); }
 
+    QString strLanguage;
+
     // window position/state settings
     QByteArray vecWindowPosMain;
 

src/util.cpp

@@ -1375,6 +1375,69 @@ ECSAddType CLocale::GetCentralServerAddressType ( const QLocale::Country eCountr
     }
 }
 
+QMap<QString, QString> CLocale::GetAvailableTranslations()
+{
+    QMap<QString, QString> TranslMap;
+    QDirIterator           DirIter ( ":/translations" );
+
+    while ( DirIter.hasNext() )
+    {
+        // get alias of translation file
+        const QString strCurFileName = DirIter.next();
+
+        // extract only language code (must be at the end, separated with a "_")
+        const QString strLoc = strCurFileName.right ( strCurFileName.length() - strCurFileName.indexOf ( "_" ) - 1 );
+
+        TranslMap[strLoc] = strCurFileName;
+    }
+
+    return TranslMap;
+}
+
+QPair<QString, QString> CLocale::FindSysLangTransFileName ( const QMap<QString, QString>& TranslMap )
+{
+    QPair<QString, QString> PairSysLang ( "", "" );
+    QStringList             slUiLang = QLocale().uiLanguages();
+
+    if ( !slUiLang.isEmpty() )
+    {
+        // only extract two first characters to identify language (ignoring
+        // location for getting a simpler implementation -> if the language
+        // is not correct, the user can change it in the GUI anyway)
+        const QString strUiLang = QLocale().uiLanguages().at ( 0 );
+
+        if ( strUiLang.length() >= 2 )
+        {
+            PairSysLang.first  = strUiLang.left ( 2 );
+            PairSysLang.second = TranslMap[PairSysLang.first];
+        }
+    }
+
+    return PairSysLang;
+}
+
+void CLocale::LoadTranslation ( const QString     strLanguage,
+                                QCoreApplication* pApp )
+{
+    // The translator objects must be static!
+    static QTranslator myappTranslator;
+    static QTranslator myqtTranslator;
+
+    QMap<QString, QString> TranslMap              = CLocale::GetAvailableTranslations();
+    const QString          strTranslationFileName = TranslMap[strLanguage];
+
+    if ( myappTranslator.load ( strTranslationFileName ) )
+    {
+        pApp->installTranslator ( &myappTranslator );
+    }
+
+    // allows the Qt messages to be translated in the application
+    if ( myqtTranslator.load ( QLocale ( strLanguage ), "qt", "_", QLibraryInfo::location ( QLibraryInfo::TranslationsPath ) ) )
+    {
+        pApp->installTranslator ( &myqtTranslator );
+    }
+}
+
 
 // Console writer factory ------------------------------------------------------
 QTextStream* ConsoleWriterFactory::get()

src/util.h

@@ -41,6 +41,9 @@
 # include "ui_aboutdlgbase.h"
 #endif
 #include <QFile>
+#include <QDirIterator>
+#include <QTranslator>
+#include <QLibraryInfo>
 #include <QUrl>
 #include <QLocale>
 #include <QElapsedTimer>
@@ -872,6 +875,10 @@ class CLocale
 public:
     static QString                 GetCountryFlagIconsResourceReference ( const QLocale::Country eCountry );
     static ECSAddType              GetCentralServerAddressType ( const QLocale::Country eCountry );
+    static QMap<QString, QString>  GetAvailableTranslations();
+    static QPair<QString, QString> FindSysLangTransFileName ( const QMap<QString, QString>& TranslMap );
+    static void                    LoadTranslation ( const QString     strLanguage,
+                                                     QCoreApplication* pApp );
 };