mirror of
https://github.com/qgis/QGIS.git
synced 2025-11-04 00:04:25 -05:00
c49b5b777f
Rationale: - there was a lot of large objects passed by value, so potentially there's a speed bump from this - even for implicitly shared classes like QString/QList there's still a (small) cost for copying the objects when there's no reason to - it's the right thing to do!
48 lines
2.0 KiB
Plaintext
48 lines
2.0 KiB
Plaintext
class QgsCacheIndexFeatureId : QgsAbstractCacheIndex
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgscacheindexfeatureid.h>
|
|
%End
|
|
public:
|
|
QgsCacheIndexFeatureId( QgsVectorLayerCache* );
|
|
|
|
/**
|
|
* Is called, whenever a feature is removed from the cache. You should update your indexes, so
|
|
* they become invalid in case this feature was required to successfuly answer a request.
|
|
*/
|
|
virtual void flushFeature( const QgsFeatureId fid );
|
|
|
|
/**
|
|
* Sometimes, the whole cache changes its state and its easier to just withdraw everything.
|
|
* In this case, this method is issued. Be sure to clear all cache information in here.
|
|
*/
|
|
virtual void flush();
|
|
|
|
/**
|
|
* @brief
|
|
* Implement this method to update the the indices, in case you need information contained by the request
|
|
* to properly index. (E.g. spatial index)
|
|
* Does nothing by default
|
|
*
|
|
* @param featureRequest The feature request that was answered
|
|
* @param fids The feature ids that have been returned
|
|
*/
|
|
virtual void requestCompleted( const QgsFeatureRequest& featureRequest, const QgsFeatureIds& fids );
|
|
|
|
/**
|
|
* Is called, when a feature request is issued on a cached layer.
|
|
* If this cache index is able to completely answer the feature request, it will return true
|
|
* and write the list of feature ids of cached features to cachedFeatures. If it is not able
|
|
* it will return false and the cachedFeatures state is undefined.
|
|
*
|
|
* @param featureIterator A reference to a {@link QgsFeatureIterator}. A valid featureIterator will
|
|
* be assigned in case this index is able to answer the request and the return
|
|
* value is true.
|
|
* @param featureRequest The feature request, for which this index is queried.
|
|
*
|
|
* @return True, if this index holds the information to answer the request.
|
|
*
|
|
*/
|
|
virtual bool getCacheIterator( QgsFeatureIterator& featureIterator, const QgsFeatureRequest& featureRequest );
|
|
};
|