QGIS API Documentation 3.27.0-Master (a46f227e17)
qgsproperty_p.h
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1/***************************************************************************
2 qgsproperty_p.h
3 ---------------
4 Date : January 2017
5 Copyright : (C) 2017 by Nyall Dawson
6 Email : nyall dot dawson at gmail dot com
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#ifndef QGSPROPERTYPRIVATE_H
16#define QGSPROPERTYPRIVATE_H
17
19
20//
21// W A R N I N G
22// -------------
23//
24// This file is not part of the QGIS API. It exists purely as an
25// implementation detail. This header file may change from version to
26// version without notice, or even be removed.
27//
28
29#define SIP_NO_FILE
30
31#include "qgis_core.h"
32#include <QSharedData>
33#include <QVariant>
34#include "qgsexpression.h"
36
37class QgsPropertyPrivate : public QSharedData
38{
39 public:
40
41 QgsPropertyPrivate() = default;
42
43 QgsPropertyPrivate( const QgsPropertyPrivate &other )
44 : QSharedData( other )
45 , type( other.type )
46 , active( other.active )
47 , transformer( other.transformer ? other.transformer->clone() : nullptr )
48 , staticValue( other.staticValue )
49 , fieldName( other.fieldName )
50 , cachedFieldIdx( other.cachedFieldIdx )
51 , expressionString( other.expressionString )
52 , expressionPrepared( other.expressionPrepared )
53 , expressionIsInvalid( other.expressionIsInvalid )
54 , expression( other.expression )
55 , expressionReferencedCols( other.expressionReferencedCols )
56 {}
57
58 ~QgsPropertyPrivate()
59 {
60 delete transformer;
61 }
62
63 int type = 0;
64
66 bool active = true;
67
69 QgsPropertyTransformer *transformer = nullptr;
70
71 // StaticData
72 QVariant staticValue;
73
74 // FieldData
75 QString fieldName;
76 mutable int cachedFieldIdx = -1;
77
78 // ExpressionData
79 QString expressionString;
80 mutable bool expressionPrepared = false;
81 mutable bool expressionIsInvalid = false;
82 mutable QgsExpression expression;
84 mutable QSet< QString > expressionReferencedCols;
85
86 private:
87 QgsPropertyPrivate &operator=( const QgsPropertyPrivate & ) = delete;
88};
89
91
92#endif // QGSPROPERTYPRIVATE_H
Class for parsing and evaluation of expressions (formerly called "search strings").
Abstract base class for objects which transform the calculated value of a property.