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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 dot kuhn at gmx 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 "qgscacheindex.h"
20 
22 
24 {
25  public:
27 
32  virtual void flushFeature( const QgsFeatureId fid );
33 
38  virtual void flush();
39 
49  virtual void requestCompleted( QgsFeatureRequest featureRequest, QgsFeatureIds fids );
50 
65  virtual bool getCacheIterator( QgsFeatureIterator& featureIterator, const QgsFeatureRequest& featureRequest );
66 
67  private:
69 };
70 
71 #endif // QGSCACHEINDEXFEATUREID_H
Wrapper for iterator of features from vector data provider or vector layer.
QSet< QgsFeatureId > QgsFeatureIds
Definition: qgsfeature.h:325
QgsVectorLayerCache * C
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.
virtual void flush()=0
Sometimes, the whole cache changes its state and its easier to just withdraw everything.
virtual bool getCacheIterator(QgsFeatureIterator &featureIterator, const QgsFeatureRequest &featureRequest)=0
Is called, when a feature request is issued on a cached layer.
Abstract base class for cache indices.
Definition: qgscacheindex.h:29
virtual void flushFeature(const QgsFeatureId fid)=0
Is called, whenever a feature is removed from the cache.
qint64 QgsFeatureId
Definition: qgsfeature.h:30
virtual void requestCompleted(QgsFeatureRequest featureRequest, QgsFeatureIds fids)
Implement this method to update the the indices, in case you need information contained by the reques...