QgsSymbolV2* QgsCategorizedSymbolRendererV2::originalSymbolForFeature( QgsFeature& feature, QgsRenderContext &context )
{
Q_UNUSED( context );
QgsAttributes attrs = feature.attributes();
QVariant value;
if ( mAttrNum == -1 )
{
Q_ASSERT( mExpression.data() );
value = mExpression->evaluate( &context.expressionContext() );
}
else
{
value = attrs.value( mAttrNum );
}
// find the right symbol for the category
QgsSymbolV2 *symbol = symbolForValue( value );
if ( symbol == skipRender() )
return nullptr;
if ( !symbol )
{
// if no symbol found use default one
return symbolForValue( QVariant( "" ) );
}
return symbol;
}
QgsSymbolV2* QgsCategorizedSymbolRendererV2::originalSymbolForFeature( QgsFeature& feature, QgsRenderContext &context )
{
QVariant value = valueForFeature( feature, context );
// find the right symbol for the category
QgsSymbolV2 *symbol = symbolForValue( value );
if ( symbol == skipRender() )
return nullptr;
if ( !symbol )
{
// if no symbol found use default one
return symbolForValue( QVariant( "" ) );
}
return symbol;
}
void QgsCategorizedSymbolRendererV2::rebuildHash()
{
mSymbolHash.clear();
for ( int i = 0; i < mCategories.size(); ++i )
{
const QgsRendererCategoryV2& cat = mCategories.at( i );
mSymbolHash.insert( cat.value().toString(), ( cat.renderState() || mCounting ) ? cat.symbol() : skipRender() );
}
}