QGeoServiceProviderFactory: Restore binary compatibility to Qt 5.10

Added a new QGeoServiceProviderFactoryV2 to load plugins offering
a navigation manager engine.

To be able to still load plugins compiled against Qt 5.10, both factories
are considered when loading plugins, using the pointer to the V2 only
when accessing the newly exposed functionality.

Change-Id: I8e5e868737c77142e77caaacef278686565928df
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/location/maps/qgeoserviceprovider_p.h b/src/location/maps/qgeoserviceprovider_p.h
index 1aaa498c..11b86bad 100644
--- a/src/location/maps/qgeoserviceprovider_p.h
+++ b/src/location/maps/qgeoserviceprovider_p.h
@@ -62,6 +62,7 @@ class QGeoRoutingManager;
 class QGeoMappingManager;
 
 class QGeoServiceProviderFactory;
+class QGeoServiceProviderFactoryV2;
 
 class QGeoServiceProviderPrivate
 {
@@ -82,6 +83,7 @@ public:
     Flags features(const char *enumName);
 
     QGeoServiceProviderFactory *factory;
+    QGeoServiceProviderFactoryV2 *factoryV2 = nullptr;
     QJsonObject metaData;
 
     QVariantMap parameterMap;