TranslationManager, Russian translation example

TranslationManager.cpp

@@ -0,0 +1,63 @@
+#include "TranslationManager.h"
+
+#include <QApplication>
+#include <QTranslator>
+#include <QDir>
+#include <QDebug>
+#include <QFileInfo>
+
+
+TranslationManager * TranslationManager::m_instance = nullptr;
+
+
+TranslationManager::TranslationManager(QObject *parent) : QObject(parent)
+{
+    m_translator = new QTranslator(this);
+}
+
+bool TranslationManager::setLanguage(const QString &language)
+{
+    qDebug() << __FUNCTION__ << " " << language;
+    // if language is "en", remove translator
+    if (language.toLower() == "en") {
+        qApp->removeTranslator(m_translator);
+        emit languageChanged();
+        return true;
+    }
+
+    // we expecting to have translation files in "i18n" directory
+    QString dir = qApp->applicationDirPath() + QDir::separator() + "i18n";
+
+    QString filename = "monero-core_" + language;
+
+    qDebug("%s: loading translation file '%s' from '%s",
+           __FUNCTION__, qPrintable(filename), qPrintable(dir));
+
+
+    if (m_translator->load(filename, dir)) {
+        qDebug("%s: translation for language '%s' loaded successfully",
+               __FUNCTION__, qPrintable(language));
+        // TODO: apply locale?
+        qApp->installTranslator(m_translator);
+        emit languageChanged();
+        return true;
+    } else {
+        qCritical("%s: error loading translation for language '%s'",
+                  __FUNCTION__, qPrintable(language));
+        return false;
+    }
+}
+
+TranslationManager *TranslationManager::instance()
+{
+    if (!m_instance) {
+        m_instance = new TranslationManager();
+    }
+    return m_instance;
+}
+
+QString TranslationManager::emptyString()
+{
+    return "";
+}
+

TranslationManager.h

@@ -0,0 +1,29 @@
+#ifndef TRANSLATIONMANAGER_H
+#define TRANSLATIONMANAGER_H
+
+#include <QObject>
+
+class QTranslator;
+class TranslationManager : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString emptyString READ emptyString  NOTIFY languageChanged)
+public:
+    Q_INVOKABLE bool setLanguage(const QString &language);
+    static TranslationManager *instance();
+
+    QString emptyString();
+
+signals:
+    void languageChanged();
+
+private:
+    explicit TranslationManager(QObject *parent = 0);
+
+private:
+    static TranslationManager * m_instance;
+    QTranslator * m_translator;
+
+};
+
+#endif // TRANSLATIONMANAGER_H

get_libwallet_api.sh

@@ -2,7 +2,7 @@
 
 
 BITMONERO_URL=https://github.com/mbg033/bitmonero.git
-BITMONERO_BRANCH=devel
+BITMONERO_BRANCH=master
 # thanks to SO: http://stackoverflow.com/a/20283965/4118915
 CPU_CORE_COUNT=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || sysctl -n hw.ncpu)
 pushd $(pwd)

lang/languages.xml

@@ -1,14 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
 <languages>
-	<language display_name="US English" locale="en_US" wallet_name="English" flag="/lang/flags/usa.png" qs="none"/>
+
-	<language display_name="UK English" locale="en_GB" wallet_name="English" flag="/lang/flags/uk.png" qs="none"/>
+<!--
-	<language display_name="Russia"     locale="ru_RU" wallet_name="English" flag="/lang/flags/russia.png" qs="none"/>
+List of available languages for your wallet's seed:
-	<language display_name="RPA"        locale="TODO"  wallet_name="English" flag="/lang/flags/rpa.png" qs="none"/>
+0 : English
-	<language display_name="Palestine"  locale="TODO"  wallet_name="English" flag="/lang/flags/palestine.png" qs="none"/>
+1 : Spanish
-	<language display_name="India"      locale="hi_IN" wallet_name="English" flag="/lang/flags/india.png" qs="none"/>
+2 : German
-    <language display_name="Italy"      locale="it_IT" wallet_name="English" flag="/lang/flags/italy.png" qs="none"/>
+3 : Italian
-    <language display_name="German"     locale="de_DE" wallet_name="English" flag="/lang/flags/german.png" qs="none"/>
+4 : Portuguese
-	<language display_name="China"      locale="zh_CN" wallet_name="English" flag="/lang/flags/china.png" qs="none"/>
+5 : Russian
-	<language display_name="Brazil"     locale="pt_BR" wallet_name="English" flag="/lang/flags/brazil.png" qs="none"/>
+6 : Japanese
-	<language display_name="Bangladesh" locale="TODO"  wallet_name="English" flag="/lang/flags/bangladesh.png" qs="none"/>
+-->
+        <language display_name="US English" locale="en_US" wallet_language="English" flag="/lang/flags/usa.png" qs="none"/>
+        <language display_name="UK English" locale="en_GB" wallet_language="English" flag="/lang/flags/uk.png" qs="none"/>
+        <language display_name="Russia"     locale="ru_RU" wallet_language="Russian" flag="/lang/flags/russia.png" qs="none"/>
+        <language display_name="RPA"        locale="en_SA" wallet_language="English" flag="/lang/flags/rpa.png" qs="none"/>
+        <language display_name="Palestine"  locale="ar_PS" wallet_language="English" flag="/lang/flags/palestine.png" qs="none"/>
+        <language display_name="India"      locale="hi_IN" wallet_language="English" flag="/lang/flags/india.png" qs="none"/>
+        <language display_name="Italy"      locale="it_IT" wallet_language="Italian" flag="/lang/flags/italy.png" qs="none"/>
+        <language display_name="German"     locale="de_DE" wallet_language="German"  flag="/lang/flags/german.png" qs="none"/>
+        <language display_name="China"      locale="zh_CN" wallet_language="English" flag="/lang/flags/china.png" qs="none"/>
+        <language display_name="Brazil"     locale="pt_BR" wallet_language="Portuguese" flag="/lang/flags/brazil.png" qs="none"/>
+        <language display_name="Bangladesh" locale="en_US" wallet_language="English" flag="/lang/flags/bangladesh.png" qs="none"/>
 </languages>

main.cpp

@@ -37,6 +37,7 @@
 #include "WalletManager.h"
 #include "Wallet.h"
 #include "PendingTransaction.h"
+#include "TranslationManager.h"
 
 
 
@@ -53,10 +54,18 @@ int main(int argc, char *argv[])
     app.installEventFilter(eventFilter);
 
     qmlRegisterType<clipboardAdapter>("moneroComponents", 1, 0, "Clipboard");
+
     qmlRegisterUncreatableType<Wallet>("Bitmonero.Wallet", 1, 0, "Wallet", "Wallet can't be instantiated directly");
+
     qmlRegisterUncreatableType<PendingTransaction>("Bitmonero.PendingTransaction", 1, 0, "PendingTransaction",
                                                    "PendingTransaction can't be instantiated directly");
 
+    qmlRegisterUncreatableType<WalletManager>("Bitmonero.WalletManager", 1, 0, "WalletManager",
+                                                   "WalletManager can't be instantiated directly");
+
+    qmlRegisterUncreatableType<TranslationManager>("moneroComponents", 1, 0, "TranslationManager",
+                                                   "TranslationManager can't be instantiated directly");
+
     qRegisterMetaType<PendingTransaction::Priority>();
 
 
@@ -69,6 +78,8 @@ int main(int argc, char *argv[])
 
     engine.rootContext()->setContextProperty("walletManager", WalletManager::instance());
 
+    engine.rootContext()->setContextProperty("translationManager", TranslationManager::instance());
+
 //  export to QML monero accounts root directory
 //  wizard is talking about where
 //  to save the wallet file (.keys, .bin), they have to be user-accessible for

monero-core.pro

@@ -19,7 +19,8 @@ HEADERS += \
     src/libwalletqt/PendingTransaction.h \
     src/libwalletqt/TransactionHistory.h \
     src/libwalletqt/TransactionInfo.h \
-    oshelper.h
+    oshelper.h \
+    TranslationManager.h
 
 
 SOURCES += main.cpp \
@@ -31,7 +32,8 @@ SOURCES += main.cpp \
     src/libwalletqt/PendingTransaction.cpp \
     src/libwalletqt/TransactionHistory.cpp \
     src/libwalletqt/TransactionInfo.cpp \
-    oshelper.cpp
+    oshelper.cpp \
+    TranslationManager.cpp
 
 lupdate_only {
 SOURCES = *.qml \
@@ -101,11 +103,11 @@ macx {
 
 # translations files;
 TRANSLATIONS = $$PWD/translations/monero-core_en.ts \ # English (could be untranslated)
-               $$PWD/translations/monero-core_de.ts \ # Deutsch
+                   $$PWD/translations/monero-core_de.ts \ # Deutsch
-               $$PWD/translations/monero-core_zh.ts \ # Chineese
+                   $$PWD/translations/monero-core_zh.ts \ # Chineese
-               $$PWD/translations/monero-core_ru.ts \ # Russian
+                   $$PWD/translations/monero-core_ru.ts \ # Russian
-               $$PWD/translations/monero-core_it.ts \ # Italian
+                   $$PWD/translations/monero-core_it.ts \ # Italian
-               $$PWD/translations/monero-core_pl.ts \ # Polish
+                   $$PWD/translations/monero-core_pl.ts \ # Polish
 
 
 
@@ -117,7 +119,7 @@ trans_update.depends = $$_PRO_FILE_
 trans_release.commands = lrelease $$_PRO_FILE_
 trans_release.depends = trans_update $$TRANSLATIONS
 
-translate.commands = $(COPY) $$PWD/*.qm ${DESTDIR}
+translate.commands = $(MKDIR) ${DESTDIR}/i18n && $(COPY) $$PWD/translations/*.qm ${DESTDIR}/i18n
 translate.depends = trans_release
 
 QMAKE_EXTRA_TARGETS += trans_update trans_release translate

translations/monero-core_de.ts

@@ -666,12 +666,13 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
         <translation type="unfinished"></translation>
     </message>

translations/monero-core_en.ts

@@ -666,12 +666,13 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
         <translation type="unfinished"></translation>
     </message>

translations/monero-core_it.ts

@@ -666,12 +666,13 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
         <translation type="unfinished"></translation>
     </message>

translations/monero-core_pl.ts

@@ -666,12 +666,13 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
         <translation type="unfinished"></translation>
     </message>

translations/monero-core_ru.ts

@@ -6,7 +6,7 @@
     <message>
         <location filename="../pages/AddressBook.qml" line="47"/>
         <source>Add new entry</source>
-        <translation type="unfinished"></translation>
+        <translation>Новая запись</translation>
     </message>
     <message>
         <location filename="../pages/AddressBook.qml" line="56"/>
@@ -666,14 +666,15 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
-        <translation type="unfinished"></translation>
+        <translation>Добро пожаловать</translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
-        <translation type="unfinished"></translation>
+        <translation>Пожалуйста выберите язык и региональный формат.</translation>
     </message>
 </context>
 <context>

translations/monero-core_zh.ts

@@ -666,12 +666,13 @@
 <context>
     <name>WizardWelcome</name>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="65"/>
+        <location filename="../wizard/WizardWelcome.qml" line="49"/>
+        <location filename="../wizard/WizardWelcome.qml" line="73"/>
         <source>Welcome</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../wizard/WizardWelcome.qml" line="76"/>
+        <location filename="../wizard/WizardWelcome.qml" line="86"/>
         <source>Please choose a language and regional format.</source>
         <translation type="unfinished"></translation>
     </message>

wizard/WizardWelcome.qml

@@ -39,11 +39,25 @@ Item {
     function onPageClosed(settingsObject) {
         var lang = languagesModel.get(gridView.currentIndex);
         settingsObject['language'] = lang.display_name;
-        settingsObject['wallet_language'] = lang.wallet_name;
+        settingsObject['wallet_language'] = lang.wallet_language;
         settingsObject['locale'] = lang.locale;
         return true
     }
 
+
+//    function retranslateUi() {
+//        welcomeText.text = qsTr("Welcome")
+//    }
+
+
+//    Connections {
+//        target: translationManager
+//        onEmptyStringChanged: {
+//            console.log("languageChanged")
+//            retranslateUi()
+//        }
+//    }
+
     Column {
         id: headerColumn
         anchors.left: parent.left
@@ -55,6 +69,7 @@ Item {
         spacing: 24
 
         Text {
+            id: welcomeText
             anchors.left: parent.left
             anchors.right: parent.right
             font.family: "Arial"
@@ -62,10 +77,14 @@ Item {
             //renderType: Text.NativeRendering
             color: "#3F3F3F"
             wrapMode: Text.Wrap
-            text: qsTr("Welcome")
+            // hack to implement dynamic translation
+            // https://wiki.qt.io/How_to_do_dynamic_translation_in_QML
+            text: qsTr("Welcome") +
+                  translationManager.emptyString
         }
 
         Text {
+            id: selectLanguageText
             anchors.left: parent.left
             anchors.right: parent.right
             font.family: "Arial"
@@ -74,6 +93,7 @@ Item {
             color: "#4A4646"
             wrapMode: Text.Wrap
             text: qsTr("Please choose a language and regional format.")
+                  + translationManager.emptyString
         }
     }
 
@@ -84,11 +104,13 @@ Item {
 
         XmlRole { name: "display_name"; query: "@display_name/string()" }
         XmlRole { name: "locale"; query: "@locale/string()" }
-        XmlRole { name: "wallet_name"; query: "@wallet_name/string()" }
+        XmlRole { name: "wallet_language"; query: "@wallet_language/string()" }
         XmlRole { name: "flag"; query: "@flag/string()" }
         // TODO: XmlListModel is read only, we should store current language somewhere else
         // and set current language accordingly
         XmlRole { name: "isCurrent"; query: "@enabled/string()" }
+
+
     }
 
     GridView {
@@ -111,6 +133,8 @@ Item {
             height: gridView.cellHeight
 
 
+
+
             Rectangle {
                 id: flagRect
                 width: 60; height: 60
@@ -139,8 +163,15 @@ Item {
                 anchors.fill: parent
                 onClicked:  {
                     gridView.currentIndex = index
+                    var data = languagesModel.get(gridView.currentIndex);
+                    if (data !== null || data !== undefined) {
+                        var locale = data.locale
+                        translationManager.setLanguage(locale.split("_")[0]);
+                    }
                 }
             }
-        }
+        } // delegate
+
+
     }
 }