QGIS API Documentation  3.21.0-Master (af9a72eda6)
qgsvaluemapfieldformatter.h
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1 /***************************************************************************
2  qgsvaluemapfieldformatter.h - QgsValueMapFieldFormatter
3 
4  ---------------------
5  begin : 3.12.2016
6  copyright : (C) 2016 by Matthias Kuhn
7  email : [email protected]
8  ***************************************************************************
9  * *
10  * This program is free software; you can redistribute it and/or modify *
11  * it under the terms of the GNU General Public License as published by *
12  * the Free Software Foundation; either version 2 of the License, or *
13  * (at your option) any later version. *
14  * *
15  ***************************************************************************/
16 #ifndef QGSVALUEMAPFIELDKIT_H
17 #define QGSVALUEMAPFIELDKIT_H
18 
19 #include "qgis_core.h"
20 #include "qgsfieldformatter.h"
21 
40 class CORE_EXPORT QgsValueMapFieldFormatter : public QgsFieldFormatter
41 {
42  public:
43 
48  static const QString NULL_VALUE;
49 
54 
55  QString id() const override;
56 
57  QString representValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const override;
58 
59  QVariant sortValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const override;
60 
61  QVariantList availableValues( const QVariantMap &config, int countLimit, const QgsFieldFormatterContext &context ) const override;
62 };
63 
64 #endif // QGSVALUEMAPFIELDKIT_H
A context for field formatter containing information like the project.
A field formatter helps to handle and display values for a field.
virtual QString id() const =0
Returns a unique id for this field formatter.
virtual QVariantList availableValues(const QVariantMap &config, int countLimit, const QgsFieldFormatterContext &context) const
Returns a list of the values that would be possible to select with this widget type On a RelationRefe...
virtual QVariant sortValue(QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value) const
If the default sort order should be overwritten for this widget, you can transform the value in here.
virtual QString representValue(QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value) const
Create a pretty String representation of the value.
Field formatter for a ValueMap field.
static const QString NULL_VALUE
Will be saved in the configuration when a value is NULL.
Represents a vector layer which manages a vector based data sets.