19#ifndef QgsVectorLayerCache_H
20#define QgsVectorLayerCache_H
27#include <unordered_set>
57 class CORE_EXPORT QgsCachedFeature
70 , mAllAttributesFetched( allAttributesFetched )
79 mCache->featureRemoved( mFeature->id() );
83 inline const QgsFeature *feature() {
return mFeature; }
85 bool allAttributesFetched()
const;
90 bool mAllAttributesFetched =
true;
93 Q_DISABLE_COPY( QgsCachedFeature )
106 void setCacheSize(
int cacheSize );
123 void setCacheGeometry(
bool cacheGeometry );
154 void setCacheAddedAttributes(
bool cacheAddedAttributes );
169 void setFullCache(
bool fullCache );
308 sipRes = sipCpp->featureCount();
312 int __bool__()
const;
322 long long featureCount()
const;
406 void onAttributeValueChanged(
QgsFeatureId fid,
int field,
const QVariant &value );
407 void onJoinAttributeValueChanged(
QgsFeatureId fid,
int field,
const QVariant &value );
410 void attributeAdded(
int field );
411 void attributeDeleted(
int field );
418 void connectJoinedLayers()
const;
420 inline void cacheFeature(
QgsFeature &feat,
bool allAttributesFetched )
422 QgsCachedFeature *cachedFeature =
new QgsCachedFeature( feat,
this, allAttributesFetched );
423 mCache.insert( feat.
id(), cachedFeature );
424 if ( mCacheUnorderedKeys.find( feat.
id() ) == mCacheUnorderedKeys.end() )
426 mCacheUnorderedKeys.insert( feat.
id() );
427 mCacheOrderedKeys.emplace_back( feat.
id() );
432 QCache< QgsFeatureId, QgsCachedFeature > mCache;
437 std::unordered_set< QgsFeatureId > mCacheUnorderedKeys;
438 std::deque< QgsFeatureId > mCacheOrderedKeys;
440 bool mCacheGeometry =
true;
441 bool mFullCache =
false;
442 QList<QgsAbstractCacheIndex *> mCacheIndices;
448 friend class QgsCachedFeature;
460 friend class TestVectorLayerCache;
WkbType
The WKB type describes the number of dimensions a geometry has.
Abstract base class for cache indices.
Delivers features from the cache.
Uses another iterator as backend and writes features to the cache.
This class represents a coordinate reference system (CRS).
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).
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Container of fields for a vector layer.
A geometry is the spatial representation of a feature.
A rectangle specified with double values.
This class caches features of a given QgsVectorLayer.
bool hasFullCache() const
Returns true if the cache is complete, ie it contains all features.
QgsFeatureIterator getFeatures(const QString &expression)
Query the layer for features matching a given expression.
void finished()
When filling the cache, this signal gets emitted once the cache is fully initialized.
void invalidated()
The cache has been invalidated and cleared.
QgsFeatureIterator getFeatures(const QgsRectangle &rectangle)
Query the layer for the features which intersect the specified rectangle.
void featureAdded(QgsFeatureId fid)
Emitted when a new feature has been added to the layer and this cache.
QgsFeatureIterator getFeatures(const QgsFeatureIds &fids)
Query the layer for the features with the given ids.
QgsFeature getFeature(QgsFeatureId fid)
Query the layer for the feature with the given id.
void cachedLayerDeleted()
Is emitted when the cached layer is deleted.
void attributeValueChanged(QgsFeatureId fid, int field, const QVariant &value)
Emitted when an attribute is changed.
void progress(int i, bool &cancel)
When filling the cache, this signal gets emitted periodically to notify about the progress and to be ...
bool cacheGeometry() const
Returns true if the cache will fetch and cache feature geometries.
Represents a vector layer which manages a vector based data sets.
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features
QList< int > QgsAttributeList