Add connection name option to dicom database

Allow dicom query database connection to exist alongside
main database connection.

Libs/DICOM/Core/ctkDICOMDatabase.cpp

@@ -95,10 +95,10 @@ ctkDICOMDatabasePrivate::~ctkDICOMDatabasePrivate()
 }
 
 //------------------------------------------------------------------------------
-void ctkDICOMDatabase::openDatabase(const QString databaseFile)
+void ctkDICOMDatabase::openDatabase(const QString databaseFile, const QString& connectionName )
 {
   Q_D(ctkDICOMDatabase);
-  d->Database = QSqlDatabase::addDatabase("QSQLITE","DICOM-DB");
+  d->Database = QSqlDatabase::addDatabase("QSQLITE",connectionName);
   d->Database.setDatabaseName(databaseFile);
   if ( ! (d->Database.open()) )
     {

Libs/DICOM/Core/ctkDICOMDatabase.h

@@ -47,7 +47,7 @@ public:
   /// open the SQLite database in @param file. If the file does not
   /// exist, a new database is created and initialized with the
   /// default schema
-  virtual void openDatabase(const QString file);
+  virtual void openDatabase(const QString databaseFile, const QString& connectionName = "DICOM-DB" );
 
   ///
   /// close the database. It must not be used afterwards.

Libs/DICOM/Widgets/ctkDICOMQueryRetrieveWidget.cpp

@@ -76,7 +76,7 @@ void ctkDICOMQueryRetrieveWidget::processQuery()
   d->RetrieveButton->setEnabled(false);
   
   // create a database in memory to hold query results
-  try { d->QueryResultDatabase.openDatabase( ":memory:" ); }
+  try { d->QueryResultDatabase.openDatabase( ":memory:", "QUERY-DB" ); }
   catch (std::exception e)
   {
     logger.error ( "Database error: " + d->QueryResultDatabase.lastError() );