void QgsPropertyOverrideButton::setToProperty( const QgsProperty &property )
{
if ( property )
{
switch ( property.propertyType() )
{
case QgsProperty::StaticProperty:
case QgsProperty::InvalidProperty:
break;
case QgsProperty::FieldBasedProperty:
{
mFieldName = property.field();
break;
}
case QgsProperty::ExpressionBasedProperty:
{
mExpressionString = property.expressionString();
break;
}
}
}
else
{
mFieldName.clear();
mExpressionString.clear();
}
mProperty = property;
setActive( mProperty && mProperty.isActive() );
updateSiblingWidgets( isActive() );
updateGui();
}
void QgsDataDefinedSizeLegend::updateFromSymbolAndProperty( const QgsMarkerSymbol *symbol, const QgsProperty &ddSize )
{
mSymbol.reset( symbol->clone() );
mSymbol->setDataDefinedSize( QgsProperty() ); // original symbol may have had data-defined size associated
const QgsSizeScaleTransformer *sizeTransformer = dynamic_cast< const QgsSizeScaleTransformer * >( ddSize.transformer() );
mSizeScaleTransformer.reset( sizeTransformer ? sizeTransformer->clone() : nullptr );
if ( mTitleLabel.isEmpty() )
mTitleLabel = ddSize.propertyType() == QgsProperty::ExpressionBasedProperty ? ddSize.expressionString() : ddSize.field();
// automatically generate classes if no classes are defined
if ( sizeTransformer && mSizeClasses.isEmpty() )
{
mSizeClasses.clear();
Q_FOREACH ( double v, QgsSymbolLayerUtils::prettyBreaks( sizeTransformer->minValue(), sizeTransformer->maxValue(), 4 ) )
{
mSizeClasses << SizeClass( v, QString::number( v ) );
}
}