[gdal] Implement the data provider reloadData() function (fixes #20536)

qgis · Apr 10, 2019 · fdb82fc · fdb82fc
1 parent 0c03900
commit fdb82fc
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diff --git a/src/providers/gdal/qgsgdalprovider.cpp b/src/providers/gdal/qgsgdalprovider.cpp
@@ -526,6 +526,15 @@ void QgsGdalProvider::closeDataset()
   closeCachedGdalHandlesFor( this );
 }
 
+void QgsGdalProvider::reloadData()
+{
+  QMutexLocker locker( mpMutex );
+  closeDataset();
+
+  mHasInit = false;
+  ( void )initIfNeeded();
+}
+
 QString QgsGdalProvider::htmlMetadata()
 {
   QMutexLocker locker( mpMutex );

diff --git a/src/providers/gdal/qgsgdalprovider.h b/src/providers/gdal/qgsgdalprovider.h
@@ -171,6 +171,8 @@ class QgsGdalProvider : public QgsRasterDataProvider, QgsGdalProviderBase
     bool setNoDataValue( int bandNo, double noDataValue ) override;
     bool remove() override;
 
+    void reloadData() override;
+
     QString validateCreationOptions( const QStringList &createOptions, const QString &format ) override;
     QString validatePyramidsConfigOptions( QgsRaster::RasterPyramidsFormat pyramidsFormat,
                                            const QStringList &configOptions, const QString &fileFormat ) override;