16 #ifndef QGSCACHEINDEXFEATUREID_H
17 #define QGSCACHEINDEXFEATUREID_H
19 #include "qgis_core.h"
34 void flush()
override;
Abstract base class for cache indices.
virtual bool getCacheIterator(QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest)=0
Is called when a feature request is issued on a cached layer.
virtual void requestCompleted(const QgsFeatureRequest &featureRequest, const QgsFeatureIds &fids)
Implement this method to update the the indices, in case you need information contained by the reques...
virtual void flush()=0
Sometimes, the whole cache changes its state and its easier to just withdraw everything.
virtual void flushFeature(QgsFeatureId fid)=0
Is called whenever a feature is removed from the cache.
Wrapper for iterator of features from vector data provider or vector layer.
This class wraps a request for features to a vector layer (or directly its vector data provider).
This class caches features of a given QgsVectorLayer.
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features