Add multi language support.

glogg.pro

@@ -318,3 +318,6 @@ else {
 perf {
     QMAKE_CXXFLAGS += -DGLOGG_PERF_MEASURE_FPS
 }
+
+TRANSLATIONS    +=  translations/glogg_zh_CN.ts
+

src/abstractlogview.cpp

@@ -360,10 +360,10 @@ void AbstractLogView::mousePressEvent( QMouseEvent* mouseEvent )
     {
         // Prepare the popup depending on selection type
         if ( selection_.isSingleLine() ) {
-            copyAction_->setText( "&Copy this line" );
+            copyAction_->setText( tr("&Copy this line") );
         }
         else {
-            copyAction_->setText( "&Copy" );
+            copyAction_->setText( tr("&Copy") );
             copyAction_->setStatusTip( tr("Copy the selection") );
         }
 

src/configuration.cpp

@@ -29,6 +29,8 @@ Configuration::Configuration()
     mainFont_ = QFont("monaco", 10);
     mainFont_.setStyleHint( QFont::Courier, QFont::PreferOutline );
 
+    languageLocale_ = "en_US";
+
     mainRegexpType_               = ExtendedRegexp;
     quickfindRegexpType_          = FixedString;
     quickfindIncremental_         = true;
@@ -95,6 +97,9 @@ void Configuration::retrieveFromStorage( QSettings& settings )
     if ( settings.contains( "session.loadLast" ) )
         loadLastSession_ = settings.value( "session.loadLast" ).toBool();
 
+    if ( settings.contains( "appearance.language" ) )
+        languageLocale_ = settings.value( "appearance.language" ).toString();
+
     // View settings
     if ( settings.contains( "view.overviewVisible" ) )
         overviewVisible_ = settings.value( "view.overviewVisible" ).toBool();
@@ -130,6 +135,7 @@ void Configuration::saveToStorage( QSettings& settings ) const
     settings.setValue( "polling.enabled", pollingEnabled_ );
     settings.setValue( "polling.intervalMs", pollIntervalMs_ );
     settings.setValue( "session.loadLast", loadLastSession_);
+    settings.setValue( "appearance.language", languageLocale_);
 
     settings.setValue( "view.overviewVisible", overviewVisible_ );
     settings.setValue( "view.lineNumbersVisibleInMain", lineNumbersVisibleInMain_ );

src/configuration.h

@@ -41,6 +41,11 @@ class Configuration : public Persistable {
     QFont mainFont() const;
     void setMainFont( QFont newFont );
 
+    QString languageLocale() const
+    {return languageLocale_;}
+    void setLanguageLocale(QString locale)
+    {languageLocale_ = locale;}
+
     // Accesses the regexp types
     SearchRegexpType mainRegexpType() const
     { return mainRegexpType_; }
@@ -106,6 +111,7 @@ class Configuration : public Persistable {
     bool pollingEnabled_;
     uint32_t pollIntervalMs_;
     bool loadLastSession_;
+    QString languageLocale_;
 
     // View settings
     bool overviewVisible_;

src/crawlerwidget.cpp

@@ -693,8 +693,8 @@ void CrawlerWidget::setup()
     searchInfoLine->setLineWidth( 1 );
     searchInfoLineDefaultPalette = searchInfoLine->palette();
 
-    ignoreCaseCheck = new QCheckBox( "Ignore &case" );
-    searchRefreshCheck = new QCheckBox( "Auto-&refresh" );
+    ignoreCaseCheck = new QCheckBox(tr("Ignore &case"));
+    searchRefreshCheck = new QCheckBox(tr("Auto-&refresh"));
 
     // Construct the Search line
     searchLabel = new QLabel(tr("&Text: "));

src/mainwindow.cpp

@@ -67,7 +67,15 @@ MainWindow::MainWindow( std::unique_ptr<Session> session,
     ,versionChecker_()
 #endif
 {
+    readSettings();
+
+    //setup language
+    lastLanguageLocale_ = "";
+    updateLanguage();
+
     createActions();
+    updateRecentFileActions();
+
     createMenus();
     createToolBars();
     // createStatusBar();
@@ -86,7 +94,7 @@ MainWindow::MainWindow( std::unique_ptr<Session> session,
 
     setWindowIcon( mainIcon_ );
 
-    readSettings();
+
 
     // Connect the signals to the mux (they will be forwarded to the
     // "current" crawlerwidget
@@ -527,8 +535,10 @@ void MainWindow::options()
 {
     OptionsDialog dialog(this);
     signalMux_.connect(&dialog, SIGNAL( optionsChanged() ), SLOT( applyConfiguration() ));
+    connect(&dialog, SIGNAL( optionsChanged() ),this, SLOT( updateLanguage() ));
     dialog.exec();
     signalMux_.disconnect(&dialog, SIGNAL( optionsChanged() ), SLOT( applyConfiguration() ));
+    disconnect(&dialog,SIGNAL( optionsChanged() ),this, SLOT( updateLanguage() ));
 }
 
 // Opens the 'About' dialog box.
@@ -967,6 +977,34 @@ void MainWindow::updateInfoLine()
     }
 }
 
+void MainWindow::loadLanguage(QString locale)
+{
+    // remove the old translator
+    qApp->removeTranslator(&translator_);
+    qApp->removeTranslator(&translatorQt_);
+
+    // load the new translator
+    QString path = QApplication::applicationDirPath();
+    path.append("/translations/");
+
+    if(translatorQt_.load(QLocale(locale),"qt","_",path,".qm"))
+        qApp->installTranslator(&translatorQt_);
+    if(translator_.load(QLocale(locale),"glogg","_",path,".qm"))
+        qApp->installTranslator(&translator_);
+}
+
+void MainWindow::updateLanguage()
+{
+    std::shared_ptr<Configuration> config =
+        Persistent<Configuration>( "settings" );
+    QString locale = config->languageLocale();
+    if(lastLanguageLocale_ == locale)
+        return;
+
+    lastLanguageLocale_ = locale;
+    loadLanguage(locale);
+}
+
 // Write settings to permanent storage
 void MainWindow::writeSettings()
 {
@@ -1002,7 +1040,6 @@ void MainWindow::readSettings()
 
     // History of recent files
     GetPersistentInfo().retrieve( QString( "recentFiles" ) );
-    updateRecentFileActions();
 
     // GetPersistentInfo().retrieve( QString( "settings" ) );
     GetPersistentInfo().retrieve( QString( "filterSet" ) );

src/mainwindow.h

@@ -22,6 +22,7 @@
 
 #include <memory>
 #include <QMainWindow>
+#include <QTranslator>
 
 #include "session.h"
 #include "crawlerwidget.h"
@@ -126,6 +127,9 @@ class MainWindow : public QMainWindow
     // Notify the user a new version is available
     void newVersionNotification( const QString& new_version );
 
+    // Update UI language
+    void updateLanguage();
+
   signals:
     // Is emitted when new settings must be used
     void optionsChanged();
@@ -154,12 +158,17 @@ class MainWindow : public QMainWindow
     void displayQuickFindBar( QuickFindMux::QFDirection direction );
     void updateMenuBarFromDocument( const CrawlerWidget* crawler );
     void updateInfoLine();
+    void loadLanguage(QString locale);
 
     std::unique_ptr<Session> session_;
     std::shared_ptr<ExternalCommunicator> externalCommunicator_;
     std::shared_ptr<RecentFiles> recentFiles_;
     QString loadingFileName;
 
+    QTranslator translator_;
+    QTranslator translatorQt_;
+    QString lastLanguageLocale_;
+
     // Encoding
     struct EncodingList {
         const char* name;

src/optionsdialog.cpp

@@ -51,6 +51,9 @@ OptionsDialog::OptionsDialog( QWidget* parent ) : QDialog(parent)
     connect(pollingCheckBox, SIGNAL( toggled( bool ) ),
             this, SLOT( onPollingChanged() ) );
 
+    locales_ = getLanguagesList();
+    setupLanguagesList();
+
     updateDialogFromConfig();
 
     setupIncremental();
@@ -111,6 +114,37 @@ void OptionsDialog::setupPolling()
     pollIntervalLineEdit->setEnabled( pollingCheckBox->isChecked() );
 }
 
+QStringList OptionsDialog::getLanguagesList()
+{
+    QString m_langPath = QApplication::applicationDirPath();
+    m_langPath.append("/translations");
+    QDir dir(m_langPath);
+    QStringList fileNames = dir.entryList(QStringList("glogg_*.qm"));
+
+    QStringList locales;
+    for (int i = 0; i < fileNames.size(); ++i)
+    {
+        // get locale extracted by filename
+        QString locale;
+        locale = fileNames[i];
+        locale.truncate(locale.lastIndexOf('.'));
+        locale.remove(0, locale.indexOf('_') + 1);
+        locales << locale;
+    }
+    locales << "en_US";     //The "C" locale is identical in behavior to English/UnitedStates.
+    return locales;
+}
+
+void OptionsDialog::setupLanguagesList()
+{
+    QStringList langNames;
+    for (int i = 0; i < locales_.size(); ++i)
+        langNames << QLocale(locales_[i]).nativeLanguageName();
+    //        langNames << QLocale::languageToString(QLocale(locales_[i]).language());
+
+    selectLanguagesComboBox->addItems(langNames);
+}
+
 // Convert a regexp type to its index in the list
 int OptionsDialog::getRegexpIndex( SearchRegexpType syntax ) const
 {
@@ -176,6 +210,9 @@ void OptionsDialog::updateDialogFromConfig()
 
     // Last session
     loadLastSessionCheckBox->setChecked( config->loadLastSession() );
+
+    // Language
+    selectLanguagesComboBox->setCurrentIndex(locales_.indexOf( config->languageLocale() ));
 }
 
 //
@@ -224,6 +261,9 @@ void OptionsDialog::updateConfigFromDialog()
     config->setPollIntervalMs( poll_interval );
 
     config->setLoadLastSession( loadLastSessionCheckBox->isChecked() );
+
+    config->setLanguageLocale( locales_[selectLanguagesComboBox->currentIndex()] );
+
     emit optionsChanged();
 }
 

src/optionsdialog.h

@@ -59,12 +59,16 @@ class OptionsDialog : public QDialog, public Ui::OptionsDialog
     void setupIncremental();
     void setupPolling();
 
+    QStringList getLanguagesList();
+    void setupLanguagesList();
+
     int getRegexpIndex( SearchRegexpType syntax ) const;
     SearchRegexpType getRegexpTypeFromIndex( int index ) const;
 
     void updateDialogFromConfig();
 
     QValidator* polling_interval_validator_;
+    QStringList locales_;
 };
 
 #endif