Add option in json exporter to not transform geometries

qgis · Oct 31, 2019 · 2f79dcc · 2f79dcc
1 parent e3371fd
commit 2f79dcc
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Showing 2 changed files with 10 additions and 13 deletions.
diff --git a/src/core/qgsjsonutils.cpp b/src/core/qgsjsonutils.cpp
@@ -43,11 +43,6 @@ QgsJsonExporter::QgsJsonExporter( QgsVectorLayer *vectorLayer, int precision )
   mTransform.setDestinationCrs( QgsCoordinateReferenceSystem( 4326, QgsCoordinateReferenceSystem::EpsgCrsId ) );
 }
 
-void QgsJsonExporter::setDestinationCrs( const QgsCoordinateReferenceSystem &crs )
-{
-  mTransform.setDestinationCrs( crs );
-}
-
 void QgsJsonExporter::setVectorLayer( QgsVectorLayer *vectorLayer )
 {
   mLayer = vectorLayer;
@@ -112,7 +107,7 @@ json QgsJsonExporter::exportFeatureToJsonObject( const QgsFeature &feature, cons
       try
       {
         QgsGeometry transformed = geom;
-        if ( transformed.transform( mTransform ) == 0 )
+        if ( mTransformGeometries && transformed.transform( mTransform ) == 0 )
           geom = transformed;
       }
       catch ( QgsCsException &cse )

diff --git a/src/core/qgsjsonutils.h b/src/core/qgsjsonutils.h
@@ -146,20 +146,20 @@ class CORE_EXPORT QgsJsonExporter
      */
     void setSourceCrs( const QgsCoordinateReferenceSystem &crs );
 
-    /**
-     * Sets the destination CRS for writing feature geometries.
-     * \param crs destination CRS for output feature geometries
-     * \since QGIS 3.10
-     */
-    void setDestinationCrs( const QgsCoordinateReferenceSystem &crs );
-
     /**
      * Returns the source CRS for feature geometries. The source CRS must be set if geometries are to be
      * correctly automatically reprojected to WGS 84, to match GeoJSON specifications.
      * \see setSourceCrs()
      */
     QgsCoordinateReferenceSystem sourceCrs() const;
 
+    /**
+     * Sets whether geometries should be transformed in EPSG 4326 (default
+     * behavior) or just keep as it is.
+     * \since QGIS 3.12
+     */
+    void setTransformGeometries( bool activate ) { mTransformGeometries = activate; }
+
     /**
      * Sets the list of attributes to include in the JSON exports.
      * \param attributes list of attribute indexes, or an empty list to include all
@@ -277,6 +277,8 @@ class CORE_EXPORT QgsJsonExporter
     QgsCoordinateTransform mTransform;
 
     bool mAttributeDisplayName = false;
+
+    bool mTransformGeometries = true;
 };
 
 /**