QString QgsWFSConnection::uriGetFeature( QString typeName, QString crsString, QString filter, QgsRectangle bBox ) const
{
//get CRS
if ( !crsString.isEmpty() )
{
crsString.prepend( "&SRSNAME=" );
}
QString filterString;
//if the xml comes from the dialog, it needs to be a string to pass the validity test
if ( filter.startsWith( "'" ) && filter.endsWith( "'" ) && filter.size() > 1 )
{
filter.chop( 1 );
filter.remove( 0, 1 );
}
if ( !filter.isEmpty() )
{
//test if filterString is already an OGC filter xml
QDomDocument filterDoc;
if ( !filterDoc.setContent( filter ) )
{
//if not, if must be a QGIS expression
QgsExpression filterExpression( filter );
if ( !filterExpression.toOGCFilter( filterDoc ) )
{
//error
}
}
filterString = "&FILTER=" + filterDoc.toString();
}
QString bBoxString;
if ( !bBox.isEmpty() )
{
bBoxString = QString( "&BBOX=%1,%2,%3,%4" )
.arg( bBox.xMinimum(), 0, 'f' )
.arg( bBox.yMinimum(), 0, 'f' )
.arg( bBox.xMaximum(), 0, 'f' )
.arg( bBox.yMaximum(), 0, 'f' );
}
QString uri = mUri;
if ( !( uri.contains( "?" ) ) )
{
uri.append( "?" );
}
//add a wfs layer to the map
uri += "SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&TYPENAME=" + typeName + crsString + bBoxString + filterString;
QgsDebugMsg( uri );
return uri;
}
void TapParameterDialog::filterActionTriggered()
{
FilterAction *fa = qobject_cast<FilterAction *>(QObject::sender());
QString filter_expr = filterExpression();
if (!fa || filter_expr.isEmpty()) {
return;
}
emit filterAction(filter_expr, fa->action(), fa->actionType());
}
QString QgsWFSCapabilities::uriGetFeature( QString typeName, QString crsString, QString filter, QgsRectangle bBox ) const
{
//get CRS
if ( !crsString.isEmpty() )
{
crsString.prepend( "&SRSNAME=" );
}
QString filterString;
//if the xml comes from the dialog, it needs to be a string to pass the validity test
if ( filter.startsWith( "'" ) && filter.endsWith( "'" ) && filter.size() > 1 )
{
filter.chop( 1 );
filter.remove( 0, 1 );
}
if ( !filter.isEmpty() )
{
//test if filterString is already an OGC filter xml
QDomDocument filterDoc;
if ( !filterDoc.setContent( filter ) )
{
//if not, if must be a QGIS expression
QgsExpression filterExpression( filter );
QDomElement filterElem = QgsOgcUtils::expressionToOgcFilter( filterExpression, filterDoc );
if ( !filterElem.isNull() )
{
filterDoc.appendChild( filterElem );
}
}
filterString = "&FILTER=" + filterDoc.toString();
}
QString bBoxString;
if ( !bBox.isEmpty() )
{
bBoxString = QString( "&BBOX=%1,%2,%3,%4" )
.arg( qgsDoubleToString( bBox.xMinimum() ) )
.arg( qgsDoubleToString( bBox.yMinimum() ) )
.arg( qgsDoubleToString( bBox.xMaximum() ) )
.arg( qgsDoubleToString( bBox.yMaximum() ) );
}
QString uri = mBaseUrl;
//add a wfs layer to the map
uri += "SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&TYPENAME=" + typeName + crsString + bBoxString + filterString;
QgsDebugMsg( uri );
return uri;
}
bool QgsLayoutAtlas::setFilterExpression( const QString &expression, QString &errorString )
{
errorString.clear();
mFilterExpression = expression;
QgsExpression filterExpression( mFilterExpression );
if ( filterExpression.hasParserError() )
{
errorString = filterExpression.parserErrorString();
return false;
}
return true;
}
int QgsLayoutAtlas::updateFeatures()
{
mCurrentFeatureNo = -1;
if ( !mCoverageLayer )
{
return 0;
}
QgsExpressionContext expressionContext = createExpressionContext();
QString error;
updateFilenameExpression( error );
// select all features with all attributes
QgsFeatureRequest req;
req.setExpressionContext( expressionContext );
mFilterParserError.clear();
if ( mFilterFeatures && !mFilterExpression.isEmpty() )
{
QgsExpression filterExpression( mFilterExpression );
if ( filterExpression.hasParserError() )
{
mFilterParserError = filterExpression.parserErrorString();
return 0;
}
//filter good to go
req.setFilterExpression( mFilterExpression );
}
QgsFeatureIterator fit = mCoverageLayer->getFeatures( req );
std::unique_ptr<QgsExpression> nameExpression;
if ( !mPageNameExpression.isEmpty() )
{
nameExpression = qgis::make_unique< QgsExpression >( mPageNameExpression );
if ( nameExpression->hasParserError() )
{
nameExpression.reset( nullptr );
}
else
{
nameExpression->prepare( &expressionContext );
}
}
// We cannot use nextFeature() directly since the feature pointer is rewinded by the rendering process
// We thus store the feature ids for future extraction
QgsFeature feat;
mFeatureIds.clear();
mFeatureKeys.clear();
std::unique_ptr<QgsExpression> sortExpression;
if ( mSortFeatures && !mSortExpression.isEmpty() )
{
sortExpression = qgis::make_unique< QgsExpression >( mSortExpression );
if ( sortExpression->hasParserError() )
{
sortExpression.reset( nullptr );
}
else
{
sortExpression->prepare( &expressionContext );
}
}
while ( fit.nextFeature( feat ) )
{
expressionContext.setFeature( feat );
QString pageName;
if ( nameExpression )
{
QVariant result = nameExpression->evaluate( &expressionContext );
if ( nameExpression->hasEvalError() )
{
QgsMessageLog::logMessage( tr( "Atlas name eval error: %1" ).arg( nameExpression->evalErrorString() ), tr( "Layout" ) );
}
pageName = result.toString();
}
mFeatureIds.push_back( qMakePair( feat.id(), pageName ) );
if ( sortExpression )
{
QVariant result = sortExpression->evaluate( &expressionContext );
if ( sortExpression->hasEvalError() )
{
QgsMessageLog::logMessage( tr( "Atlas sort eval error: %1" ).arg( sortExpression->evalErrorString() ), tr( "Layout" ) );
}
mFeatureKeys.insert( feat.id(), result );
}
}
// sort features, if asked for
if ( !mFeatureKeys.isEmpty() )
{
AtlasFeatureSorter sorter( mFeatureKeys, mSortAscending );
std::sort( mFeatureIds.begin(), mFeatureIds.end(), sorter ); // clazy:exclude=detaching-member
}
emit numberFeaturesChanged( mFeatureIds.size() );
return mFeatureIds.size();
}
