QGIS API Documentation 3.99.0-Master (f78f5286a64)
qgsfeatureexpressionfilterprovider.h
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1/***************************************************************************
2 qgsfeatureexpressionfilterprovider.h
3 ------------------
4 begin : 2025-07-26
5 copyright : (C) 2025 by Mathieu Pellerin
6 email : mathieu at opengis dot ch
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 QGSFEATUREEXPRESSIONFILTERPROVIDER_H
19#define QGSFEATUREEXPRESSIONFILTERPROVIDER_H
20
22#include "qgis_core.h"
23
24#include <QMap>
25
26class QgsExpression;
27
35{
36 public:
39
40 Q_DECL_DEPRECATED void filterFeatures( const QgsVectorLayer *layer, QgsFeatureRequest &filterFeatures ) const override SIP_DEPRECATED;
41 void filterFeatures( const QString &layerId, QgsFeatureRequest &filterFeatures ) const override;
42 QStringList layerAttributes( const QgsVectorLayer *layer, const QStringList &attributes ) const override;
44
50 void setFilter( const QString &layerId, const QgsExpression &expression );
51
52 private:
53 QMap<QString, QString> mFilters;
54};
55
56#endif
Handles parsing and evaluation of expressions (formerly called "search strings").
A feature filter provider allowing to set filter expressions on a per-layer basis.
QgsFeatureExpressionFilterProvider()=default
Constructor.
Abstract interface for use by classes that filter the features or attributes of a layer.
virtual QStringList layerAttributes(const QgsVectorLayer *layer, const QStringList &attributes) const =0
Returns the list of visible attribute names from a list of attributes names for the given layer.
virtual Q_DECL_DEPRECATED void filterFeatures(const QgsVectorLayer *layer, QgsFeatureRequest &featureRequest) const
Add additional filters to the feature request to further restrict the features returned by the reques...
virtual QgsFeatureFilterProvider * clone() const =0
Create a clone of the feature filter provider.
Wraps a request for features to a vector layer (or directly its vector data provider).
Represents a vector layer which manages a vector based dataset.
#define SIP_DEPRECATED
Definition qgis_sip.h:114
#define SIP_FACTORY
Definition qgis_sip.h:84