Address Peter's points from review

Author: wonder-sk

python/core/auto_generated/mesh/qgsmeshrenderersettings.sip.in

@@ -274,7 +274,6 @@ Reads configuration from the given DOM element
 };
 
 
-
 class QgsMeshRendererSettings
 {
 %Docstring

src/app/mesh/qgsrenderermeshpropertieswidget.cpp

@@ -125,6 +125,7 @@ void QgsRendererMeshPropertiesWidget::onActiveDatasetGroupChanged()
   mMeshRendererVectorSettingsWidget->syncToLayer();
 
   mContoursGroupBox->setChecked( scalarGroup >= 0 );
+  mContoursGroupBox->setEnabled( scalarGroup >= 0 );
   mVectorsGroupBox->setChecked( vectorGroup >= 0 );
   mVectorsGroupBox->setEnabled( vectorGroup >= 0 );
 }

src/core/mesh/qgsmeshlayerutils.cpp

@@ -51,7 +51,7 @@ void QgsMeshLayerUtils::calculateMinimumMaximum( double &min, double &max, const
 
 void QgsMeshLayerUtils::calculateMinMaxForDatasetGroup( double &min, double &max, QgsMeshDataProvider *provider, int groupIndex )
 {
-  if ( groupIndex < 0 || groupIndex >= provider->datasetGroupCount() )
+  if ( groupIndex < 0 || !provider || groupIndex >= provider->datasetGroupCount() )
   {
     min = std::numeric_limits<double>::quiet_NaN();
     max = std::numeric_limits<double>::quiet_NaN();
@@ -73,7 +73,7 @@ void QgsMeshLayerUtils::calculateMinMaxForDatasetGroup( double &min, double &max
 
 void QgsMeshLayerUtils::calculateMinMaxForDataset( double &min, double &max, QgsMeshDataProvider *provider, QgsMeshDatasetIndex index )
 {
-  if ( !index.isValid() )
+  if ( !index.isValid() || !provider )
   {
     min = std::numeric_limits<double>::quiet_NaN();
     max = std::numeric_limits<double>::quiet_NaN();

src/core/mesh/qgsmeshlayerutils.h

@@ -40,13 +40,22 @@ class CORE_EXPORT QgsMeshLayerUtils
 {
   public:
 
-    //! Calculates min/max values from the given vector of values
+    /**
+     * Calculates min/max values from the given vector of values.
+     * Ignores any NaN values in the input. Returns NaN for min/max on error.
+     */
     static void calculateMinimumMaximum( double &min, double &max, const QVector<double> &arr );
 
-    //! Calculates min/max values for the whole dataset group (considering all datasets within it)
+    /**
+     * Calculates min/max values for the whole dataset group (considering all datasets within it).
+     * Ignores any NaN values in the input. Returns NaN for min/max on error.
+     */
     static void calculateMinMaxForDatasetGroup( double &min, double &max, QgsMeshDataProvider *provider, int groupIndex );
 
-    //! Calculates min/max values for one dataset
+    /**
+     * Calculates min/max values for one dataset.
+     * Ignores any NaN values in the input. Returns NaN for min/max on error.
+     */
     static void calculateMinMaxForDataset( double &min, double &max, QgsMeshDataProvider *provider, QgsMeshDatasetIndex index );
 };
 

src/core/mesh/qgsmeshrenderersettings.h

@@ -24,6 +24,7 @@
 #include "qgis_core.h"
 #include "qgis.h"
 #include "qgscolorrampshader.h"
+#include "qgsmeshdataprovider.h"
 
 
 /**
@@ -252,8 +253,6 @@ class CORE_EXPORT QgsMeshRendererVectorSettings
 };
 
 
-#include "qgsmeshdataprovider.h"
-
 /**
  * \ingroup core
  *