sharpetronics/QGIS
1
0
Fork 0
mirror of https://github.com/qgis/QGIS.git synced 2025-02-28 00:17:30 -05:00
Code Issues Packages Projects Releases Wiki Activity

Don't treat null values as zero for graduated symbology

Browse Source
This commit is contained in:
Nyall Dawson 2013-03-04 12:36:00 +11:00
parent f91e79bcf1
commit f7bf3f2819
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/core/symbology-ng/qgsgraduatedsymbolrendererv2.cpp
View File

@ -192,7 +192,11 @@ QgsSymbolV2* QgsGraduatedSymbolRendererV2::symbolForFeature( QgsFeature& feature
return NULL;
}
// find the right category
// Null values should not be categorized
if ( attrs[mAttrNum] == "")
return NULL;
// find the right category
QgsSymbolV2* symbol = symbolForValue( attrs[mAttrNum].toDouble() );
if ( symbol == NULL )
return NULL;
@ -802,8 +806,12 @@ QgsGraduatedSymbolRendererV2* QgsGraduatedSymbolRendererV2::createRenderer(
lst.append( attrNum );
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFlags( QgsFeatureRequest::NoGeometry ).setSubsetOfAttributes( lst ) );
// create list of non-null attribute values
while ( fit.nextFeature( f ) )
values.append( f.attribute( attrNum ).toDouble() );
if ( f.attribute( attrNum ) != "" )
values.append( f.attribute( attrNum ).toDouble() );
// calculate the breaks
if ( mode == Quantile )
{