basic translation support

src/citra_qt/CMakeLists.txt

@@ -80,8 +80,21 @@ set(UIS
             hotkeys.ui
             main.ui
             )
+set(LANGS
+            translation/language_en.ts
+)
+find_package(Qt5 REQUIRED COMPONENTS LinguistTools ${QT_PREFIX_HINT})
 
-create_directory_groups(${SRCS} ${HEADERS} ${UIS})
+# Some packages might be in the system include path, qt5_create_translation is poorly written
+# and will explicitly list all INCLUDE_DIRECTORIES for translation search which would take hours.
+# To avoid this we first clear the list, and then restore it afterwards..
+get_directory_property(_inc_DIRS INCLUDE_DIRECTORIES)
+set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES "")
+qt5_create_translation(translations ${SRCS} ${HEADERS} ${UIS} ${LANGS})
+set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES "${_inc_DIRS}")
+
+qt5_add_translation(TRANSLATIONS ${LANGS})
+create_directory_groups(${SRCS} ${HEADERS} ${UIS} ${LANGS})
 
 if (Qt5_FOUND)
     qt5_wrap_ui(UI_HDRS ${UIS})
@@ -90,12 +103,13 @@ else()
 endif()
 
 if (APPLE)
+    SET_SOURCE_FILES_PROPERTIES("${TRANSLATIONS}" PROPERTIES MACOSX_PACKAGE_LOCATION MacOS/languages)
     set(MACOSX_ICON "../../dist/citra.icns")
     set_source_files_properties(${MACOSX_ICON} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
-    add_executable(citra-qt MACOSX_BUNDLE ${SRCS} ${HEADERS} ${UI_HDRS} ${MACOSX_ICON})
+    add_executable(citra-qt MACOSX_BUNDLE ${SRCS} ${HEADERS} ${UI_HDRS} ${TRANSLATIONS} ${MACOSX_ICON})
     set_target_properties(citra-qt PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/Info.plist)
 else()
-    add_executable(citra-qt ${SRCS} ${HEADERS} ${UI_HDRS})
+    add_executable(citra-qt ${SRCS} ${HEADERS} ${UI_HDRS} ${TRANSLATIONS})
 endif()
 target_link_libraries(citra-qt core video_core audio_core common input_common)
 target_link_libraries(citra-qt ${OPENGL_gl_LIBRARY} ${CITRA_QT_LIBS})

src/citra_qt/configuration/configure_general.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <QDir>
+#include <QLocale>
 #include "citra_qt/configuration/configure_general.h"
 #include "citra_qt/ui_settings.h"
 #include "core/core.h"
@@ -15,6 +17,21 @@ ConfigureGeneral::ConfigureGeneral(QWidget* parent)
     this->setConfiguration();
 
     ui->toggle_cpu_jit->setEnabled(!Core::System::GetInstance().IsPoweredOn());
+
+    // locale stuff
+    QString m_langPath = QApplication::applicationDirPath();
+    m_langPath.append("/languages");
+    QDir dir(m_langPath);
+    QStringList fileNames = dir.entryList(QStringList("*.qm"));
+
+    for (int i = 0; i < fileNames.size(); ++i) {
+        // get locale extracted by filename
+        QString locale;
+        locale = fileNames[i];                    // "de.qm"
+        locale.truncate(locale.lastIndexOf('.')); // "de"
+        QString lang = locale.right(2);
+        ui->language_combobox->addItem(lang, locale);
+    }
 }
 
 ConfigureGeneral::~ConfigureGeneral() {}
@@ -29,6 +46,10 @@ void ConfigureGeneral::setConfiguration() {
 }
 
 void ConfigureGeneral::applyConfiguration() {
+    QString m_langPath = QApplication::applicationDirPath() + "/languages/" +
+                         ui->language_combobox->currentData().toString() + ".qm";
+    translator.load(m_langPath);
+
     UISettings::values.gamedir_deepscan = ui->toggle_deepscan->isChecked();
     UISettings::values.confirm_before_closing = ui->toggle_check_exit->isChecked();
     Settings::values.region_value = ui->region_combobox->currentIndex() - 1;

src/citra_qt/configuration/configure_general.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <memory>
+#include <QTranslator>
 #include <QWidget>
 
 namespace Ui {
@@ -25,4 +26,5 @@ private:
 
 private:
     std::unique_ptr<Ui::ConfigureGeneral> ui;
+    QTranslator translator;
 };

src/citra_qt/configuration/configure_general.ui

@@ -24,6 +24,21 @@
        <layout class="QHBoxLayout" name="horizontalLayout_3">
         <item>
          <layout class="QVBoxLayout" name="verticalLayout_2">
+          <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_6">
+             <item>
+               <widget class="QLabel" name="label2">
+                <property name="text">
+                 <string>Language:</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QComboBox" name="language_combobox">
+              </widget>
+             </item>
+            </layout>
+           </item>
           <item>
            <widget class="QCheckBox" name="toggle_deepscan">
             <property name="text">