Make it possible to MapItems to rendered under some style layers

Add a MapParamter to specify the default "before" layer for MapItems
that Mapbox GL can render. This can be used for inserting route lines
before labels.

Change-Id: I3ee414ee8af31f38b74c95b3ecc31df6085bed30
Reviewed-by: Paolo Angelelli <paolo.angelelli@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/plugins/geoservices/mapboxgl/qgeomappingmanagerenginemapboxgl.cpp b/src/plugins/geoservices/mapboxgl/qgeomappingmanagerenginemapboxgl.cpp
index 0535bf96..211c0bba 100644
--- a/src/plugins/geoservices/mapboxgl/qgeomappingmanagerenginemapboxgl.cpp
+++ b/src/plugins/geoservices/mapboxgl/qgeomappingmanagerenginemapboxgl.cpp
@@ -138,6 +138,10 @@ QGeoMappingManagerEngineMapboxGL::QGeoMappingManagerEngineMapboxGL(const QVarian
         m_useFBO = parameters.value(QStringLiteral("mapboxgl.mapping.use_fbo")).toBool();
     }
 
+    if (parameters.contains(QStringLiteral("mapboxgl.mapping.items.insert_before"))) {
+        m_mapItemsBefore = parameters.value(QStringLiteral("mapboxgl.mapping.items.insert_before")).toString();
+    }
+
     engineInitialized();
 }
 
@@ -150,6 +154,7 @@ QGeoMap *QGeoMappingManagerEngineMapboxGL::createMap()
     QGeoMapMapboxGL* map = new QGeoMapMapboxGL(this, 0);
     map->setMapboxGLSettings(m_settings);
     map->setUseFBO(m_useFBO);
+    map->setMapItemsBefore(m_mapItemsBefore);
 
     return map;
 }