[keyboard] Move responsibility for retranslation to Config

- only widgets get language change events, so we need to
  hook that up to the ViewSteps and inform the Config
  object so that it can (re)load translations for the
  keyboard data.

src/modules/keyboard/Config.cpp

@@ -560,3 +560,8 @@ Config::setConfigurationMap( const QVariantMap& configurationMap )
         m_writeEtcDefaultKeyboard = true;
     }
 }
+
+void
+Config::retranslate()
+{
+}

src/modules/keyboard/Config.h

@@ -58,6 +58,17 @@ public:
      */
     KeyboardVariantsModel* keyboardVariants() const;
 
+    /** @brief Call this to change application language
+     *
+     * The models (for keyboard model, layouts and variants) provide
+     * translations of strings in the xkb table, so need to be
+     * notified of language changes as well.
+     *
+     * Only widgets get LanguageChange events, so one of them will
+     * need to call this.
+     */
+    void retranslate();
+
 signals:
     void prettyStatusChanged();
 

src/modules/keyboard/KeyboardLayoutModel.cpp

@@ -123,10 +123,6 @@ KeyboardModelsModel::KeyboardModelsModel( QObject* parent )
     }
 
     cDebug() << "Loaded" << m_list.count() << "keyboard models";
-
-    CALAMARES_RETRANSLATE( if ( !s_kbtranslator ) { s_kbtranslator = new QTranslator; } cqDeleter<QTranslator> d { s_kbtranslator };
-                           d.preserve
-                           = CalamaresUtils::loadTranslator( QLocale(), QStringLiteral( "kb_" ), s_kbtranslator ); )
 }
 
 

src/modules/keyboard/KeyboardPage.cpp

@@ -95,10 +95,17 @@ KeyboardPage::KeyboardPage( Config* config, QWidget* parent )
     connect( config->keyboardVariants(), &KeyboardVariantsModel::currentIndexChanged, [this]( int index ) {
         ui->variantSelector->setCurrentIndex( m_config->keyboardVariants()->index( index ) );
     } );
-    CALAMARES_RETRANSLATE( ui->retranslateUi( this ); )
+    CALAMARES_RETRANSLATE_SLOT( &KeyboardPage::retranslate )
 }
 
 KeyboardPage::~KeyboardPage()
 {
     delete ui;
 }
+
+void
+KeyboardPage::retranslate()
+{
+    ui->retranslateUi( this );
+    m_config->retranslate();
+}

src/modules/keyboard/KeyboardPage.h

@@ -37,6 +37,8 @@ public:
     explicit KeyboardPage( Config* config, QWidget* parent = nullptr );
     ~KeyboardPage() override;
 
+    void retranslate();
+
 private:
     Ui::Page_Keyboard* ui;
     KeyBoardPreview* m_keyboardPreview;