I18N: add basic functionality and a few translations

Added very first i18n support in the simple application.
Placed language buttons at the bottom to change current language.
They should be removed once current language comes from somewhere.
Laying out issues should be fixed later.

Change-Id: Ib5d646784820cb2753edd5a588a8826ad7d20539
Signed-off-by: Tasuku Suzuki <tasuku.suzuki@qt.io>
Signed-off-by: Tadao Tanikawa <tanikawa.tadao@jp.panasonic.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/app/translator.cpp b/app/translator.cpp
new file mode 100644
index 0000000..9b67f13
--- /dev/null
+++ b/app/translator.cpp
@@ -0,0 +1,52 @@
+#include "translator.h"
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QLocale>
+#include <QtCore/QTranslator>
+#include <QtCore/QDir>
+#include <QtCore/QDebug>
+
+Translator::Translator(QObject *parent)
+    : QObject(parent)
+    , m_language(QStringLiteral("C"))
+    , m_translator(nullptr)
+{
+}
+
+QString Translator::translate(const QString &string, const QString &language) const
+{
+    Q_UNUSED(language)
+    return string;
+}
+
+QString Translator::language() const
+{
+    return m_language;
+}
+
+void Translator::setLanguage(const QString &language)
+{
+    if (m_language == language) return;
+    m_language = language;
+    setTranslator(language);
+    emit languageChanged(language);
+}
+
+void Translator::setTranslator(const QString &language)
+{
+    if (m_translator) {
+        QCoreApplication::removeTranslator(m_translator);
+    } else {
+        m_translator = new QTranslator(this);
+    }
+    QLocale locale(language);
+    QString fileName = QCoreApplication::instance()->applicationName().toLower();
+    qDebug() << "####" << QDir::currentPath() << QCoreApplication::applicationDirPath();
+    if (m_translator->load(locale, fileName, QStringLiteral("_"), QStringLiteral("%1/../translations").arg(QCoreApplication::applicationDirPath()))) {
+        QCoreApplication::installTranslator(m_translator);
+    } else {
+        delete m_translator;
+        m_translator = nullptr;
+    }
+}
+