bool QgsSymbolLayerV2::hasDataDefinedProperty( const QString& property ) const
{
if ( mDataDefinedProperties.isEmpty() )
return false;
QgsDataDefined* dd = getDataDefinedProperty( property );
return dd && dd->isActive();
}
void QgsEllipseSymbolLayerV2::writeSldMarker( QDomDocument &doc, QDomElement &element, QgsStringMap props ) const
{
// <Graphic>
QDomElement graphicElem = doc.createElement( "se:Graphic" );
element.appendChild( graphicElem );
QgsSymbolLayerV2Utils::wellKnownMarkerToSld( doc, graphicElem, mSymbolName, mFillColor, mOutlineColor, mOutlineStyle, mOutlineWidth, mSymbolWidth );
// store w/h factor in a <VendorOption>
double widthHeightFactor = mSymbolWidth / mSymbolHeight;
QDomElement factorElem = QgsSymbolLayerV2Utils::createVendorOptionElement( doc, "widthHeightFactor", QString::number( widthHeightFactor ) );
graphicElem.appendChild( factorElem );
// <Rotation>
QgsDataDefined* ddRotation = getDataDefinedProperty( QgsSymbolLayerV2::EXPR_ROTATION );
QString angleFunc = props.value( "angle", "" );
if ( angleFunc.isEmpty() ) // symbol has no angle set
{
if ( ddRotation && ddRotation->isActive() )
{
angleFunc = ddRotation->useExpression() ? ddRotation->expressionString() : ddRotation->field();
}
else if ( !qgsDoubleNear( mAngle, 0.0 ) )
angleFunc = QString::number( mAngle );
}
else if ( ddRotation && ddRotation->isActive() )
{
// the symbol has an angle and the symbol layer have a rotation
// property set
angleFunc = QString( "%1 + %2" ).arg( angleFunc ).arg( ddRotation->useExpression() ? ddRotation->expressionString() : ddRotation->field() );
}
else if ( !qgsDoubleNear( mAngle, 0.0 ) )
{
// both the symbol and the symbol layer have angle value set
bool ok;
double angle = angleFunc.toDouble( &ok );
if ( !ok )
{
// its a string (probably a property name or a function)
angleFunc = QString( "%1 + %2" ).arg( angleFunc ).arg( mAngle );
}
else if ( !qgsDoubleNear( angle + mAngle, 0.0 ) )
{
// it's a double value
angleFunc = QString::number( angle + mAngle );
}
}
QgsSymbolLayerV2Utils::createRotationElement( doc, graphicElem, angleFunc );
}
QVariant QgsSymbolLayerV2::evaluateDataDefinedProperty( const QString &property, const QgsFeature* feature, const QVariant& defaultVal, bool *ok ) const
{
if ( ok )
*ok = false;
QgsDataDefined* dd = getDataDefinedProperty( property );
if ( !dd || !dd->isActive() )
return defaultVal;
if ( dd->useExpression() )
{
if ( dd->expression() )
{
QgsExpressionContext context = feature ? QgsExpressionContextUtils::createFeatureBasedContext( *feature, QgsFields() ) : QgsExpressionContext();
QVariant result = dd->expression()->evaluate( &context );
if ( result.isValid() )
{
if ( ok )
*ok = true;
return result;
}
else
return defaultVal;
}
else
{
return defaultVal;
}
}
else if ( feature && !dd->field().isEmpty() && !mFields.isEmpty() )
{
int attributeIndex = mFields.fieldNameIndex( dd->field() );
if ( attributeIndex >= 0 )
{
if ( ok )
*ok = true;
return feature->attribute( attributeIndex );
}
}
return defaultVal;
}
QVariant QgsSymbolLayerV2::evaluateDataDefinedProperty( const QString& property, const QgsSymbolV2RenderContext& context, const QVariant& defaultVal, bool* ok ) const
{
if ( ok )
*ok = false;
QgsDataDefined* dd = getDataDefinedProperty( property );
if ( !dd || !dd->isActive() )
return defaultVal;
if ( dd->useExpression() )
{
if ( dd->expression() )
{
QVariant result = dd->expression()->evaluate( &context.renderContext().expressionContext() );
if ( result.isValid() )
{
if ( ok )
*ok = true;
return result;
}
else
return defaultVal;
}
else
{
return defaultVal;
}
}
else if ( context.feature() && !dd->field().isEmpty() && !mFields.isEmpty() )
{
int attributeIndex = mFields.fieldNameIndex( dd->field() );
if ( attributeIndex >= 0 )
{
if ( ok )
*ok = true;
return context.feature()->attribute( attributeIndex );
}
}
return defaultVal;
}
QString QgsSymbolLayerV2::dataDefinedPropertyString( const QString& property ) const
{
const QgsDataDefined* dd = getDataDefinedProperty( property );
return dd ? dd->expressionString() : QString();
}
QgsExpression* QgsSymbolLayerV2::expression( const QString& property ) const
{
QgsDataDefined* dd = getDataDefinedProperty( property );
return dd ? dd->expression() : nullptr;
}