QList<QString> QgsCategorizedSymbolRendererV2::usedAttributes()
{
QSet<QString> attributes;
// mAttrName can contain either attribute name or an expression.
// Sometimes it is not possible to distinguish between those two,
// e.g. "a - b" can be both a valid attribute name or expression.
// Since we do not have access to fields here, try both options.
attributes << mAttrName;
QgsExpression testExpr( mAttrName );
if ( !testExpr.hasParserError() )
attributes.unite( testExpr.referencedColumns().toSet() );
if ( mRotation.data() ) attributes.unite( mRotation->referencedColumns().toSet() );
if ( mSizeScale.data() ) attributes.unite( mSizeScale->referencedColumns().toSet() );
QgsCategoryList::const_iterator catIt = mCategories.constBegin();
for ( ; catIt != mCategories.constEnd(); ++catIt )
{
QgsSymbolV2* catSymbol = catIt->symbol();
if ( catSymbol )
{
attributes.unite( catSymbol->usedAttributes() );
}
}
return attributes.toList();
}
void QgsCategorizedSymbolRendererV2::toSld( QDomDocument &doc, QDomElement &element ) const
{
QgsStringMap props;
props[ "attribute" ] = mAttrName;
if ( mRotation.data() )
props[ "angle" ] = mRotation->expression();
if ( mSizeScale.data() )
props[ "scale" ] = mSizeScale->expression();
// create a Rule for each range
for ( QgsCategoryList::const_iterator it = mCategories.constBegin(); it != mCategories.constEnd(); ++it )
{
QgsStringMap catProps( props );
it->toSld( doc, element, catProps );
}
}
void QgsCategorizedSymbolRendererV2::toSld( QDomDocument &doc, QDomElement &element ) const
{
QgsStringMap props;
props[ "attribute" ] = mAttrName;
if ( !mRotationField.isEmpty() )
props[ "angle" ] = QString( mRotationField ).append( "\"" ).prepend( "\"" );
if ( !mSizeScaleField.isEmpty() )
props[ "scale" ] = QString( mSizeScaleField ).append( "\"" ).prepend( "\"" );
// create a Rule for each range
for ( QgsCategoryList::const_iterator it = mCategories.constBegin(); it != mCategories.constEnd(); it++ )
{
QgsStringMap catProps( props );
it->toSld( doc, element, catProps );
}
}
QgsLegendSymbolList QgsCategorizedSymbolRendererV2::legendSymbolItems()
{
QSettings settings;
bool showClassifiers = settings.value( "/qgis/showLegendClassifiers", false ).toBool();
QgsLegendSymbolList lst;
if ( showClassifiers )
{
lst << qMakePair( classAttribute(), ( QgsSymbolV2* )0 );
}
QgsCategoryList::const_iterator catIt = mCategories.constBegin();
for ( ; catIt != mCategories.constEnd(); ++catIt )
{
lst << qMakePair( catIt->label(), catIt->symbol() );
}
return lst;
}
QList<QString> QgsCategorizedSymbolRendererV2::usedAttributes()
{
QgsExpression exp( mAttrName );
QSet<QString> attributes( exp.referencedColumns().toSet() );
if ( mRotation.data() ) attributes.unite( mRotation->referencedColumns().toSet() );
if ( mSizeScale.data() ) attributes.unite( mSizeScale->referencedColumns().toSet() );
QgsCategoryList::const_iterator catIt = mCategories.constBegin();
for ( ; catIt != mCategories.constEnd(); ++catIt )
{
QgsSymbolV2* catSymbol = catIt->symbol();
if ( catSymbol )
{
attributes.unite( catSymbol->usedAttributes() );
}
}
return attributes.toList();
}
QList<QString> QgsCategorizedSymbolRendererV2::usedAttributes()
{
QSet<QString> attributes;
attributes.insert( mAttrName );
if ( !mRotationField.isEmpty() )
{
attributes.insert( mRotationField );
}
if ( !mSizeScaleField.isEmpty() )
{
attributes.insert( mSizeScaleField );
}
QgsCategoryList::const_iterator catIt = mCategories.constBegin();
for ( ; catIt != mCategories.constEnd(); ++catIt )
{
QgsSymbolV2* catSymbol = catIt->symbol();
if ( catSymbol )
{
attributes.unite( catSymbol->usedAttributes() );
}
}
return attributes.toList();
}
