Rockbox Utility: listen to translation change events.

When changing the language don't require a restart anymore. Instead listen to
the appropriate changeEvent and retranslate the UI. Designer generated UI files
already provide such a function.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30633 a1c6a512-1295-4272-9138-f99709370657

rbutil/rbutilqt/configure.cpp

@@ -39,6 +39,7 @@
 #include <tchar.h>
 #include <windows.h>
 #endif
+#include "rbutilqt.h"
 
 #define DEFAULT_LANG "English (en)"
 #define DEFAULT_LANG_CODE "en"
@@ -147,13 +148,6 @@ void Config::accept()
     else proxyType = "manual";
     RbSettings::setValue(RbSettings::ProxyType, proxyType);
 
-    // language
-    if(RbSettings::value(RbSettings::Language).toString() != language
-            && !language.isEmpty()) {
-        QMessageBox::information(this, tr("Language changed"),
-            tr("You need to restart the application for the changed language "
-               "to take effect."));
-    }
     RbSettings::setValue(RbSettings::Language, language);
 
     // mountpoint
@@ -563,10 +557,36 @@ QString Config::languageName(const QString &qmFile)
 void Config::updateLanguage()
 {
     qDebug() << "[Config] update selected language";
+
+    // remove all old translators
+    for(int i = 0; i < RbUtilQt::translators.size(); ++i) {
+        qApp->removeTranslator(RbUtilQt::translators.at(i));
+        // do not delete old translators, this confuses Qt.
+    }
+    RbUtilQt::translators.clear();
     QList<QListWidgetItem*> a = ui.listLanguages->selectedItems();
     if(a.size() > 0)
         language = lang.value(a.at(0)->text());
     qDebug() << "[Config] new language:" << language;
+
+    QString applang = QLocale::system().name();
+    QTranslator *translator = new QTranslator(qApp);
+    QTranslator *qttrans = new QTranslator(qApp);
+    QString absolutePath = QCoreApplication::instance()->applicationDirPath();
+
+    if(!translator->load("rbutil_" + language, absolutePath))
+        translator->load("rbutil_" + language, ":/lang");
+    if(!qttrans->load("qt_" + language,
+                QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
+        qttrans->load("qt_" + language, ":/lang");
+
+    qApp->installTranslator(translator);
+    qApp->installTranslator(qttrans);
+    RbUtilQt::translators.append(translator);
+    RbUtilQt::translators.append(qttrans);
+
+    QLocale::setDefault(language);
+
 }
 
 
@@ -878,3 +898,13 @@ void Config::configEnc()
     updateEncState();
 }
 
+
+void Config::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/configure.h

@@ -52,6 +52,7 @@ class Config : public QDialog
         QUrl proxy;
         QString mountpoint;
         void updateCacheInfo(QString);
+        void changeEvent(QEvent *event);
 
     private slots:
         void setNoProxy(bool);

rbutil/rbutilqt/createvoicewindow.cpp

@@ -132,3 +132,13 @@ void CreateVoiceWindow::saveSettings(void)
                          ui.wavtrimthreshold->value());
     RbSettings::sync();
 }
+
+void CreateVoiceWindow::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/createvoicewindow.h

@@ -46,6 +46,7 @@ class CreateVoiceWindow : public QDialog
         void settingsUpdated(void);
 
     private:
+        void changeEvent(QEvent *event);
         VoiceFileCreator* voicecreator;
         Ui::CreateVoiceFrm ui;
         ProgressLoggerGui* logger;

rbutil/rbutilqt/installtalkwindow.cpp

@@ -145,3 +145,13 @@ void InstallTalkWindow::updateSettings(void)
     emit settingsUpdated();
 }
 
+
+void InstallTalkWindow::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/installtalkwindow.h

@@ -46,6 +46,7 @@ class InstallTalkWindow : public QDialog
         void settingsUpdated(void);
 
     private:
+        void changeEvent(QEvent *event);
         TalkFileCreator* talkcreator;
         Ui::InstallTalkFrm ui;
         ProgressLoggerGui* logger;

rbutil/rbutilqt/installwindow.cpp

@@ -317,4 +317,12 @@ void InstallWindow::setDetailsArchived(bool show)
 }
 
 
+void InstallWindow::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
 

rbutil/rbutilqt/installwindow.h

@@ -46,6 +46,7 @@ class InstallWindow : public QDialog
         ZipInstaller* installer;
         QString m_backupName;
         void resizeEvent(QResizeEvent*);
+        void changeEvent(QEvent *event);
 
         void changeBackupPath(QString);
         void updateBackupLocation(void);

rbutil/rbutilqt/main.cpp

@@ -71,7 +71,13 @@ int main( int argc, char ** argv ) {
     if(QObject::tr("LTR") == "RTL")
         app.setLayoutDirection(Qt::RightToLeft);
 
+    // keep a list of installed translators. Needed to be able uninstalling them
+    // later again (in case of translation changes)
+    QList<QTranslator*> translators;
+    translators.append(&translator);
+    translators.append(&qttrans);
     RbUtilQt window(0);
+    RbUtilQt::translators = translators;
     window.show();
 
 //    app.connect( &app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()) );

rbutil/rbutilqt/preview.cpp

@@ -54,6 +54,16 @@ void PreviewDlg::leaveEvent(QEvent * event)
     this->close();
 }
 
+
+void PreviewDlg::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+
 PreviewLabel::PreviewLabel(QWidget * parent, Qt::WindowFlags f)
             :QLabel(parent,f)
 {

rbutil/rbutilqt/preview.h

@@ -36,6 +36,7 @@ public:
     void setText(QString text);
 
 private slots:
+    void changeEvent(QEvent *event);
     void mouseMoveEvent(QMouseEvent * event);
     void leaveEvent(QEvent * event);
 

rbutil/rbutilqt/rbutilqt.cpp

@@ -57,6 +57,8 @@
 #include <windows.h>
 #endif
 
+QList<QTranslator*> RbUtilQt::translators;
+
 RbUtilQt::RbUtilQt(QWidget *parent) : QMainWindow(parent)
 {
     // startup log
@@ -1380,3 +1382,13 @@ void RbUtilQt::downloadUpdateDone(bool error)
     }
 }
 
+
+void RbUtilQt::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QMainWindow::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/rbutilqt.h

@@ -25,6 +25,8 @@
 
 #include <QSettings>
 #include <QTemporaryFile>
+#include <QList>
+#include <QTranslator>
 
 #include "ui_rbutilqtfrm.h"
 #include "httpget.h"
@@ -38,10 +40,12 @@ class RbUtilQt : public QMainWindow
 
     public:
         RbUtilQt(QWidget *parent = 0);
+        static QList<QTranslator*> translators;
 
     private:
         Ui::RbUtilQtFrm ui;
 
+        void changeEvent(QEvent *e);
         void initDeviceNames(void);
         QString deviceName(QString);
         QString platform;

rbutil/rbutilqt/sysinfo.cpp

@@ -81,3 +81,12 @@ QString Sysinfo::getInfo()
 }
 
 
+void Sysinfo::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/sysinfo.h

@@ -34,10 +34,11 @@ class Sysinfo : public QDialog
 
         static QString getInfo();
     private:
+        void changeEvent(QEvent *event);
         Ui::SysinfoFrm ui;
 
     private slots:
-        void updateSysinfo(void);
+         void updateSysinfo(void);
 
 };
 

rbutil/rbutilqt/systrace.cpp

@@ -121,3 +121,13 @@ void SysTrace::flush(void)
     }
 }
 
+
+void SysTrace::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/systrace.h

@@ -35,6 +35,7 @@ class SysTrace : public QDialog
         static void save(QString filename = "");
     private:
         static void flush(void);
+        void changeEvent(QEvent *event);
         Ui::SysTraceFrm ui;
         static QString debugbuffer;
         static QString lastmessage;

rbutil/rbutilqt/themesinstallwindow.cpp

@@ -359,3 +359,13 @@ void ThemesInstallWindow::accept()
 
 }
 
+
+void ThemesInstallWindow::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/themesinstallwindow.h

@@ -49,6 +49,7 @@ class ThemesInstallWindow : public QDialog
         HttpGet igetter;
         QTemporaryFile themesInfo;
         void resizeEvent(QResizeEvent*);
+        void changeEvent(QEvent *event);
         QByteArray imgData;
         ProgressLoggerGui *logger;
         ZipInstaller *installer;

rbutil/rbutilqt/uninstallwindow.cpp

@@ -89,3 +89,13 @@ void UninstallWindow::UninstallMethodChanged(bool complete)
        ui.smartGroupBox->setEnabled(true);
 }
 
+
+void UninstallWindow::changeEvent(QEvent *e)
+{
+    if(e->type() == QEvent::LanguageChange) {
+        ui.retranslateUi(this);
+    } else {
+        QWidget::changeEvent(e);
+    }
+}
+

rbutil/rbutilqt/uninstallwindow.h

@@ -40,7 +40,9 @@ class UninstallWindow : public QDialog
     private slots:
         void selectionChanged();
         void UninstallMethodChanged(bool complete);
+
     private:
+        void changeEvent(QEvent *event);
         Uninstaller* uninstaller;
         Ui::UninstallFrm ui;
         ProgressLoggerGui* logger;