Add parameter to control prefetching in tile-based geoservice plugins

Change-Id: I18fc1788f7af0efe76f97257ffe739eb1a96e6cc
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 13 insertions, 1 deletions

diff --git a/src/plugins/geoservices/mapbox/qgeotiledmappingmanagerenginemapbox.cpp b/src/plugins/geoservices/mapbox/qgeotiledmappingmanagerenginemapbox.cpp
index 4b62aece..090ba310 100644
--- a/src/plugins/geoservices/mapbox/qgeotiledmappingmanagerenginemapbox.cpp
+++ b/src/plugins/geoservices/mapbox/qgeotiledmappingmanagerenginemapbox.cpp
@@ -221,6 +221,16 @@ QGeoTiledMappingManagerEngineMapbox::QGeoTiledMappingManagerEngineMapbox(const Q
             tileCache->setExtraTextureUsage(cacheSize);
     }
 
+    /* PREFETCHING */
+    if (parameters.contains(QStringLiteral("mapbox.mapping.prefetching_style"))) {
+        const QString prefetchingMode = parameters.value(QStringLiteral("mapbox.mapping.prefetching_style")).toString();
+        if (prefetchingMode == QStringLiteral("TwoNeighbourLayers"))
+            m_prefetchStyle = QGeoTiledMap::PrefetchTwoNeighbourLayers;
+        else if (prefetchingMode == QStringLiteral("OneNeighbourLayer"))
+            m_prefetchStyle = QGeoTiledMap::PrefetchNeighbourLayer;
+        else if (prefetchingMode == QStringLiteral("NoPrefetching"))
+            m_prefetchStyle = QGeoTiledMap::NoPrefetching;
+    }
 
     setTileCache(tileCache);
 
@@ -234,7 +244,9 @@ QGeoTiledMappingManagerEngineMapbox::~QGeoTiledMappingManagerEngineMapbox()
 
 QGeoMap *QGeoTiledMappingManagerEngineMapbox::createMap()
 {
-    return new QGeoTiledMap(this, 0);
+    QGeoTiledMap *map = new QGeoTiledMap(this, 0);
+    map->setPrefetchStyle(m_prefetchStyle);
+    return map;
 }
 
 QT_END_NAMESPACE