Address review

python/PyQt6/gui/auto_generated/numericformats/qgsnumericformatselectorwidget.sip.in

@@ -44,9 +44,11 @@ The caller takes ownership of the returned object.
 
     void registerExpressionContextGenerator( QgsExpressionContextGenerator *generator );
 %Docstring
-Register an expression context generator class that will be used to retrieve
+Register an expression context ``generator`` class that will be used to retrieve
 an expression context for the widget when required.
 
+Ownership is not transferred, and the ``generator`` must exist for the lifetime of this widget.
+
 .. versionadded:: 3.40
 %End
 

python/gui/auto_generated/numericformats/qgsnumericformatselectorwidget.sip.in

@@ -44,9 +44,11 @@ The caller takes ownership of the returned object.
 
     void registerExpressionContextGenerator( QgsExpressionContextGenerator *generator );
 %Docstring
-Register an expression context generator class that will be used to retrieve
+Register an expression context ``generator`` class that will be used to retrieve
 an expression context for the widget when required.
 
+Ownership is not transferred, and the ``generator`` must exist for the lifetime of this widget.
+
 .. versionadded:: 3.40
 %End
 

src/core/symbology/qgslinearreferencingsymbollayer.cpp

@@ -1,5 +1,5 @@
 /***************************************************************************
-    qgslinearreferencingsymbollayer.h
+    qgslinearreferencingsymbollayer.cpp
     ---------------------
     begin                : August 2024
     copyright            : (C) 2024 by Nyall Dawson
@@ -286,6 +286,13 @@ void QgsLinearReferencingSymbolLayer::renderPolyline( const QPolygonF &points, Q
     return;
   }
 
+  // TODO (maybe?): if we don't have an original geometry, convert points to linestring and scale distance to painter units?
+  // in reality this line type makes no sense for rendering non-real feature geometries...
+  ( void )points;
+  const QgsAbstractGeometry *geometry = context.renderContext().geometry();
+  if ( !geometry )
+    return;
+
   double skipMultiples = mSkipMultiplesOf;
   if ( mDataDefinedProperties.isActive( QgsSymbolLayer::Property::SkipMultiples ) )
   {
@@ -314,13 +321,6 @@ void QgsLinearReferencingSymbolLayer::renderPolyline( const QPolygonF &points, Q
   const double labelOffsetPainterUnitsY = context.renderContext().convertToPainterUnits( labelOffsetY, mLabelOffsetUnit, mLabelOffsetMapUnitScale );
   const double averageAngleDistancePainterUnits = context.renderContext().convertToPainterUnits( averageOver, mAverageAngleLengthUnit, mAverageAngleLengthMapUnitScale ) / 2;
 
-  // TODO (maybe?): if we don't have an original geometry, convert points to linestring and scale distance to painter units?
-  // in reality this line type makes no sense for rendering non-real feature geometries...
-  ( void )points;
-  const QgsAbstractGeometry *geometry = context.renderContext().geometry();
-  if ( !geometry )
-    return;
-
   for ( auto partIt = geometry->const_parts_begin(); partIt != geometry->const_parts_end(); ++partIt )
   {
     renderGeometryPart( context, *partIt, labelOffsetPainterUnitsX, labelOffsetPainterUnitsY, skipMultiples, averageAngleDistancePainterUnits, showMarker );
@@ -803,8 +803,6 @@ void QgsLinearReferencingSymbolLayer::renderPolylineVertex( const QgsLineString
 
     const QPointF pt = pointToPainter( context, thisX, thisY, thisZ );
 
-    double calculatedAngle = 0;
-
     // track forward by averageAngleLengthPainterUnits
     double painterDistRemaining = averageAngleLengthPainterUnits;
     double startAverageSegmentX = thisXPainterUnits;
@@ -882,7 +880,7 @@ void QgsLinearReferencingSymbolLayer::renderPolylineVertex( const QgsLineString
       startAverageYPainterUnits = endAverageSegmentY;
     }
 
-    calculatedAngle = std::fmod( QgsGeometryUtilsBase::azimuth( startAverageXPainterUnits, startAverageYPainterUnits, endAverageXPainterUnits, endAverageYPainterUnits ) + 360, 360 );
+    double calculatedAngle = std::fmod( QgsGeometryUtilsBase::azimuth( startAverageXPainterUnits, startAverageYPainterUnits, endAverageXPainterUnits, endAverageYPainterUnits ) + 360, 360 );
 
     if ( calculatedAngle > 90 && calculatedAngle < 270 )
       calculatedAngle += 180;

src/core/symbology/qgslinearreferencingsymbollayer.h

@@ -304,6 +304,9 @@ class CORE_EXPORT QgsLinearReferencingSymbolLayer : public QgsLineSymbolLayer
   private:
     void renderPolylineInterval( const QgsLineString *line, QgsSymbolRenderContext &context, double skipMultiples, const QPointF &labelOffsetPainterUnits, double averageAngleLengthPainterUnits, bool showMarker );
     void renderPolylineVertex( const QgsLineString *line, QgsSymbolRenderContext &context, double skipMultiples, const QPointF &labelOffsetPainterUnits, double averageAngleLengthPainterUnits, bool showMarker );
+    void renderGeometryPart( QgsSymbolRenderContext &context, const QgsAbstractGeometry *geometry, double labelOffsetPainterUnitsX, double labelOffsetPainterUnitsY, double skipMultiples, double averageAngleDistancePainterUnits, bool showMarker );
+    void renderLineString( QgsSymbolRenderContext &context, const QgsLineString *line, double labelOffsetPainterUnitsX, double labelOffsetPainterUnitsY, double skipMultiples, double averageAngleDistancePainterUnits, bool showMarker );
+
     static QPointF pointToPainter( QgsSymbolRenderContext &context, double x, double y, double z );
 
     Qgis::LinearReferencingPlacement mPlacement = Qgis::LinearReferencingPlacement::IntervalCartesian2D;
@@ -327,8 +330,6 @@ class CORE_EXPORT QgsLinearReferencingSymbolLayer : public QgsLineSymbolLayer
     Qgis::RenderUnit mAverageAngleLengthUnit = Qgis::RenderUnit::Millimeters;
     QgsMapUnitScale mAverageAngleLengthMapUnitScale;
 
-    void renderGeometryPart( QgsSymbolRenderContext &context, const QgsAbstractGeometry *geometry, double labelOffsetPainterUnitsX, double labelOffsetPainterUnitsY, double skipMultiples, double averageAngleDistancePainterUnits, bool showMarker );
-    void renderLineString( QgsSymbolRenderContext &context, const QgsLineString *line, double labelOffsetPainterUnitsX, double labelOffsetPainterUnitsY, double skipMultiples, double averageAngleDistancePainterUnits, bool showMarker );
 };
 
 #endif // QGSLINEARREFERENCINGSYMBOLLAYER_H

src/gui/numericformats/qgsnumericformatselectorwidget.h

@@ -58,8 +58,11 @@ class GUI_EXPORT QgsNumericFormatSelectorWidget : public QgsPanelWidget, private
     QgsNumericFormat *format() const SIP_TRANSFERBACK;
 
     /**
-     * Register an expression context generator class that will be used to retrieve
+     * Register an expression context \a generator class that will be used to retrieve
      * an expression context for the widget when required.
+     *
+     * Ownership is not transferred, and the \a generator must exist for the lifetime of this widget.
+     *
      * \since QGIS 3.40
      */
     void registerExpressionContextGenerator( QgsExpressionContextGenerator *generator );