Display date in locale format

Add GetLocale(), GetDateFormat() and FormatDate()

src/controller/KissCount.cpp

@@ -649,3 +649,18 @@ bool KissCount::ChangeDatabase(QString filename)
 {
     return _db->ChangeDatabase(filename);
 }
+
+QLocale* KissCount::GetLocale()
+{
+    return _wxUI->GetLocale();
+}
+
+QString KissCount::GetDateFormat()
+{
+    return _wxUI->GetDateFormat();
+}
+
+QString KissCount::FormatDate(int day, int month, int year)
+{
+    return QDate(year, month, day).toString(_wxUI->GetDateFormat());
+}

src/controller/KissCount.hpp

@@ -139,6 +139,10 @@ public:
 
     bool ChangeDatabase(QString filename);
 
+    QLocale* GetLocale();
+    QString GetDateFormat();
+    QString FormatDate(int day, int month, int year);
+
 private:
     wxUI* _wxUI;
     Database* _db;