QGIS API Documentation  3.6.0-Noosa (5873452)
qgsfeaturefilter.h
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1 /***************************************************************************
2  qgsfeaturefilter.h
3  ------------------
4  begin : 26-10-2017
5  copyright : (C) 2017 by Patrick Valsecchi
6  email : patrick dot valsecchi at camptocamp dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSFEATUREFILTER_H
19 #define QGSFEATUREFILTER_H
20 
22 #include "qgis_server.h"
23 
24 #include <QMap>
25 
26 class QgsExpression;
27 
34 class SERVER_EXPORT QgsFeatureFilter : public QgsFeatureFilterProvider
35 {
36  public:
38  QgsFeatureFilter() = default;
39 
45  void filterFeatures( const QgsVectorLayer *layer, QgsFeatureRequest &filterFeatures ) const override;
46 
51  QgsFeatureFilterProvider *clone() const override SIP_FACTORY;
52 
58  void setFilter( const QgsVectorLayer *layer, const QgsExpression &expression );
59 
60  private:
61  QMap<QString, QString> mFilters;
62 };
63 
64 #endif
Class for parsing and evaluation of expressions (formerly called "search strings").
virtual QgsFeatureFilterProvider * clone() const =0
Create a clone of the feature filter provider.
A feature filter provider allowing to set filter expressions on a per-layer basis.
This class wraps a request for features to a vector layer (or directly its vector data provider)...
Abstract interface for use by classes that filter the features of a layer.
#define SIP_FACTORY
Definition: qgis_sip.h:69
virtual void filterFeatures(const QgsVectorLayer *layer, QgsFeatureRequest &featureRequest) const =0
Add additional filters to the feature request to further restrict the features returned by the reques...
Represents a vector layer which manages a vector based data sets.