add a factory for the different connection types

connections/canconfactory.cpp

@@ -1,6 +1,19 @@
+#include <QString>
 #include "canconfactory.h"
+#include "socketcan.h"
+#include "gvretserial.h"
 
-CanConFactory::CanConFactory()
+using namespace CANCon;
+
+CANConnection* CanConFactory::create(type pType, QString pPortName)
 {
+    switch(pType) {
+        case SOCKETCAN:
+            return new SocketCanConnection(pPortName);
+        case GVRET_SERIAL:
+            return new GVRetSerial(pPortName);
+        default: {}
+    }
 
+    return NULL;
 }