Make database filename available in ctkDICOMDatabase interface

Libs/DICOM/Core/ctkDICOMDatabase.cpp

@@ -143,6 +143,12 @@ const QString ctkDICOMDatabase::GetLastError() const {
 }
 
 //------------------------------------------------------------------------------
+const QString ctkDICOMDatabase::GetDatabaseFilename() const {
+  Q_D(const ctkDICOMDatabase);
+  return d->DatabaseFileName;
+}
+
+//------------------------------------------------------------------------------
 const QSqlDatabase& ctkDICOMDatabase::database() const {
   Q_D(const ctkDICOMDatabase);
   return d->Database;

Libs/DICOM/Core/ctkDICOMDatabase.h

@@ -40,6 +40,7 @@ public:
 
   const QSqlDatabase& database() const;
   const QString GetLastError() const;
+  const QString GetDatabaseFilename() const;
 
   ///
   /// open the SQLite database in @param file. If the file does not