QgsProperty QgsProperty::fromField( const QString &fieldName, bool isActive )
{
QgsProperty p;
p.setField( fieldName );
p.setActive( isActive );
return p;
}
QgsProperty QgsProperty::fromValue( const QVariant &value, bool isActive )
{
QgsProperty p;
p.setStaticValue( value );
p.setActive( isActive );
return p;
}
QgsProperty QgsProperty::fromExpression( const QString &expression, bool isActive )
{
QgsProperty p;
p.setExpressionString( expression );
p.setActive( isActive );
return p;
}
void QgsSymbolsListWidget::createAuxiliaryField()
{
// try to create an auxiliary layer if not yet created
if ( !mLayer->auxiliaryLayer() )
{
QgsNewAuxiliaryLayerDialog dlg( mLayer, this );
dlg.exec();
}
// return if still not exists
if ( !mLayer->auxiliaryLayer() )
return;
QgsPropertyOverrideButton *button = qobject_cast<QgsPropertyOverrideButton *>( sender() );
QgsSymbolLayer::Property key = static_cast< QgsSymbolLayer::Property >( button->propertyKey() );
const QgsPropertyDefinition def = QgsSymbolLayer::propertyDefinitions()[key];
// create property in auxiliary storage if necessary
if ( !mLayer->auxiliaryLayer()->exists( def ) )
mLayer->auxiliaryLayer()->addAuxiliaryField( def );
// update property with join field name from auxiliary storage
QgsProperty property = button->toProperty();
property.setField( QgsAuxiliaryLayer::nameFromProperty( def, true ) );
property.setActive( true );
button->updateFieldLists();
button->setToProperty( property );
QgsMarkerSymbol *markerSymbol = static_cast<QgsMarkerSymbol *>( mSymbol );
QgsLineSymbol *lineSymbol = static_cast<QgsLineSymbol *>( mSymbol );
switch ( key )
{
case QgsSymbolLayer::PropertyAngle:
if ( markerSymbol )
markerSymbol->setDataDefinedAngle( button->toProperty() );
break;
case QgsSymbolLayer::PropertySize:
if ( markerSymbol )
{
markerSymbol->setDataDefinedSize( button->toProperty() );
markerSymbol->setScaleMethod( QgsSymbol::ScaleDiameter );
}
break;
case QgsSymbolLayer::PropertyStrokeWidth:
if ( lineSymbol )
lineSymbol->setDataDefinedWidth( button->toProperty() );
break;
default:
break;
}
emit changed();
}