QGIS API Documentation 4.0.0-Norrköping (1ddcee3d0e4)
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qgsdefaultvalue.cpp
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1/***************************************************************************
2 qgsdefaultvalue.cpp
3
4 ---------------------
5 begin : 19.9.2017
6 copyright : (C) 2017 by Matthias Kuhn
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#include "qgsdefaultvalue.h"
17
18#include "moc_qgsdefaultvalue.cpp"
19
21 : mExpression( expression )
22 , mApplyOnUpdate( applyOnUpdate )
23{}
24
26{
27 return mExpression == other.mExpression && mApplyOnUpdate == other.mApplyOnUpdate;
28}
29
31{
32 return mExpression;
33}
34
36{
37 mExpression = expression;
38}
39
41{
42 return mApplyOnUpdate;
43}
44
46{
47 mApplyOnUpdate = applyOnUpdate;
48}
49
51{
52 return !mExpression.isEmpty();
53}
54
55QgsDefaultValue::operator bool() const
56{
57 return !mExpression.isEmpty();
58}
QgsDefaultValue(const QString &expression=QString(), bool applyOnUpdate=false)
Create a new default value with the given expression and applyOnUpdate flag.
void setApplyOnUpdate(bool applyOnUpdate)
The applyOnUpdate flag determines if this expression should also be applied when a feature is updated...
bool isValid() const
Returns if this default value should be applied.
bool operator==(const QgsDefaultValue &other) const
void setExpression(const QString &expression)
The expression will be evaluated whenever a default value needs to be calculated for a field.