workaround to create unique memory layer data sources (fixes #12206)

qgis · Feb 17, 2015 · f64730e · f64730e · nirvn · Feb 17, 2015
1 parent 255cbd2
commit f64730e
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Showing 3 changed files with 7 additions and 2 deletions.
diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
@@ -6343,6 +6343,9 @@ QgsVectorLayer *QgisApp::pasteToNewMemoryVector()
 
   QString typeName = QString( QGis::featureType( wkbType ) ).replace( "WKB", "" );
 
+  static int pastedFeatureLayers = 0;
+  typeName += QString( "?memoryid=pasted_features%1" ).arg( ++pastedFeatureLayers );
+
   QgsDebugMsg( QString( "output wkbType = %1 typeName = %2" ).arg( wkbType ).arg( typeName ) );
 
   QString message;

diff --git a/src/gui/qgsnewmemorylayerdialog.cpp b/src/gui/qgsnewmemorylayerdialog.cpp
@@ -64,7 +64,8 @@ QgsVectorLayer *QgsNewMemoryLayerDialog::runAndCreateLayer( QWidget *parent )
       geomType = "point";
   }
 
-  QString layerProperties = geomType + QString( "?crs=%1" ).arg( crsId );
+  static int createScratchLayers = 0;
+  QString layerProperties = QString( "%1?crs=%2&memoryid=scratchlayer%3" ).arg( geomType ).arg( crsId ).arg( ++createScratchLayers );
   QString name = dialog.layerName().isEmpty() ? tr( "New scratch layer" ) : dialog.layerName();
   QgsVectorLayer* newLayer = new QgsVectorLayer( layerProperties, name, QString( "memory" ) );
   return newLayer;

diff --git a/src/plugins/roadgraph/exportdlg.cpp b/src/plugins/roadgraph/exportdlg.cpp
@@ -76,7 +76,8 @@ QgsVectorLayer* RgExportDlg::mapLayer() const
   if ( layerId == QString( "-1" ) )
   {
     // create a temporary layer
-    myLayer = new QgsVectorLayer( "LineString?crs=epsg:4326", "shortest path", "memory" );
+    static int createdLayers = 0;
+    myLayer = new QgsVectorLayer( QString( "LineString?crs=epsg:4326&memoryid=rglayer%1" ).arg( ++createdLayers ), "shortest path", "memory" );
 
     QgsVectorDataProvider *prov = myLayer->dataProvider();
     if ( prov == NULL )