Add clearData() call to map qml api

Add clearData call to clear texture, memory and disk
cache. Update mapviewer example and add "prefetchData"
and "clearData" to Tools menu.

Task-number: QTBUG-47292
Change-Id: Ifc71a3652688d1403f5b011ef231b59381c17ee3
Reviewed-by: Harald Meyer <dev@meh.at>
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/src/imports/location/qdeclarativegeomap.cpp b/src/imports/location/qdeclarativegeomap.cpp
index d9981b69..80208a9b 100644
--- a/src/imports/location/qdeclarativegeomap.cpp
+++ b/src/imports/location/qdeclarativegeomap.cpp
@@ -908,6 +908,18 @@ void QDeclarativeGeoMap::prefetchData()
 }
 
 /*!
+    \qmlmethod void QtLocation::Map::clearData()
+
+    Clears map data collected by the currently selected plugin.
+    \note This method will delete cached files.
+    \sa plugin
+*/
+void QDeclarativeGeoMap::clearData()
+{
+    m_map->clearData();
+}
+
+/*!
     \qmlproperty string QtLocation::Map::errorString
 
     This read-only property holds the textual presentation of the latest mapping provider error.
diff --git a/src/imports/location/qdeclarativegeomap_p.h b/src/imports/location/qdeclarativegeomap_p.h
index 22450ec1..fb36104a 100644
--- a/src/imports/location/qdeclarativegeomap_p.h
+++ b/src/imports/location/qdeclarativegeomap_p.h
@@ -127,6 +127,7 @@ public:
     Q_INVOKABLE void fitViewportToMapItems();
     Q_INVOKABLE void pan(int dx, int dy);
     Q_INVOKABLE void prefetchData(); // optional hint for prefetch
+    Q_INVOKABLE void clearData();
 
     QString errorString() const;
     QGeoServiceProvider::Error error() const;