QGIS API Documentation 3.29.0-Master (8c80f25a4f)
qgscacheindexfeatureid.h
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1/***************************************************************************
2 qgscacheindexfeatureid.h
3 --------------------------------------
4 Date : 13.2.2013
5 Copyright : (C) 2013 Matthias Kuhn
6 Email : matthias at opengis dot ch
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
16#ifndef QGSCACHEINDEXFEATUREID_H
17#define QGSCACHEINDEXFEATUREID_H
18
19#include "qgis_core.h"
20#include "qgscacheindex.h"
21
23
29{
30 public:
32
33 void flushFeature( QgsFeatureId fid ) override;
34 void flush() override;
35 void requestCompleted( const QgsFeatureRequest &featureRequest, const QgsFeatureIds &fids ) override;
36 bool getCacheIterator( QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest ) override;
37
38 private:
39 QgsVectorLayerCache *C = nullptr;
40};
41
42#endif // QGSCACHEINDEXFEATUREID_H
Abstract base class for cache indices.
Definition: qgscacheindex.h:32
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
Definition: qgsfeatureid.h:37
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features
Definition: qgsfeatureid.h:28