QGIS API Documentation 3.41.0-Master (d5b93354e9c)
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#include <qgscacheindexfeatureid.h>
Public Member Functions | |
QgsCacheIndexFeatureId (QgsVectorLayerCache *) | |
void | flush () override |
Sometimes, the whole cache changes its state and its easier to just withdraw everything. | |
void | flushFeature (QgsFeatureId fid) override |
Is called whenever a feature is removed from the cache. | |
bool | getCacheIterator (QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest) override |
Is called when a feature request is issued on a cached layer. | |
void | requestCompleted (const QgsFeatureRequest &featureRequest, const QgsFeatureIds &fids) override |
Implement this method to update the the indices, in case you need information contained by the request to properly index. | |
Public Member Functions inherited from QgsAbstractCacheIndex | |
QgsAbstractCacheIndex ()=default | |
virtual | ~QgsAbstractCacheIndex ()=default |
Definition at line 28 of file qgscacheindexfeatureid.h.
QgsCacheIndexFeatureId::QgsCacheIndexFeatureId | ( | QgsVectorLayerCache * | cachedVectorLayer | ) |
Definition at line 21 of file qgscacheindexfeatureid.cpp.
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overridevirtual |
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.
Implements QgsAbstractCacheIndex.
Definition at line 32 of file qgscacheindexfeatureid.cpp.
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overridevirtual |
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 successfully answer a request.
Implements QgsAbstractCacheIndex.
Definition at line 27 of file qgscacheindexfeatureid.cpp.
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overridevirtual |
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 set the iterator to a valid iterator over the cached features. If it is not able it will return false
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featureIterator | A reference to a QgsFeatureIterator. A valid featureIterator will be assigned in case this index is able to answer the request and the return value is true . |
featureRequest | The feature request, for which this index is queried. |
true
, if this index holds the information to answer the request. Implements QgsAbstractCacheIndex.
Definition at line 42 of file qgscacheindexfeatureid.cpp.
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overridevirtual |
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
featureRequest | The feature request that was answered |
fids | The feature ids that have been returned |
Reimplemented from QgsAbstractCacheIndex.
Definition at line 36 of file qgscacheindexfeatureid.cpp.