Language settings has been added to designer

designer/designersettingmanager.h

@@ -0,0 +1,27 @@
+#ifndef DESIGNERSETTINGMANAGER_H
+#define DESIGNERSETTINGMANAGER_H
+
+#include <QObject>
+#include <QLocale>
+#include <QApplication>
+#include <QSettings>
+
+class DesignerSettingManager : public QObject
+{
+    Q_OBJECT
+public:
+    explicit DesignerSettingManager(QObject *parent = 0);
+    ~DesignerSettingManager();
+    void setApplicationInstance(QApplication* application);
+signals:
+
+public slots:
+    void getAviableLanguages(QList<QLocale::Language>* languages);
+    QLocale::Language getCurrentDefaultLanguage();
+    void currentDefaulLanguageChanged(QLocale::Language language);
+private:
+    QApplication* m_app;
+    QSettings* m_setting;
+};
+
+#endif // DESIGNERSETTINGMANAGER_H