QGIS API Documentation 3.37.0-Master (49cede7946b)
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qgsattributeformlegacyinterface.cpp
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1/***************************************************************************
2 qgsattributeformlegacyinterface.cpp
3 --------------------------------------
4 Date : 13.5.2014
5 Copyright : (C) 2014 Matthias Kuhn
6 Email : matthias at opengis dot ch
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
17
18#include "qgspythonrunner.h"
19#include "qgsattributeform.h"
20
21#include <QString>
22#include <QDateTime>
23#include <QRegularExpression>
24
25QgsAttributeFormLegacyInterface::QgsAttributeFormLegacyInterface( const QString &function, const QString &pyFormName, QgsAttributeForm *form )
27 , mPyFunctionName( function )
28 , mPyFormVarName( pyFormName )
29{
30 static int sLayerCounter = 0;
31 mPyLayerVarName = QStringLiteral( "_qgis_layer_%1_%2" ).arg( form->layer()->id() ).arg( sLayerCounter++ );
32 const thread_local QRegularExpression reClean( QRegularExpression( "[^a-zA-Z0-9_]" ) );
33 mPyLayerVarName.replace( reClean, QStringLiteral( "_" ) ); // clean identifier
34
35 const QString initLayer = QStringLiteral( "%1 = sip.wrapinstance( %2, qgis.core.QgsVectorLayer )" )
36 .arg( mPyLayerVarName )
37 .arg( ( quint64 ) form->layer() );
38
39 QgsPythonRunner::run( initLayer );
40}
41
43{
44 const QString delLayer = QStringLiteral( "del %1" ).arg( mPyLayerVarName );
45 QgsPythonRunner::run( delLayer );
46}
47
49{
50 QDialogButtonBox *buttonBox = form()->findChild<QDialogButtonBox *>();
51 if ( buttonBox )
52 {
53 // If the init function did not call disconnect, we do it here before reconnecting
54 // If it did call disconnect, then the call will just do nothing
55 QObject::disconnect( buttonBox, &QDialogButtonBox::accepted, form(), &QgsAttributeForm::save );
56 QObject::connect( buttonBox, &QDialogButtonBox::accepted, form(), &QgsAttributeForm::save );
57 }
58
59 // Generate the unique ID of this feature. We used to use feature ID but some providers
60 // return a ID that is an invalid python variable when we have new unsaved features.
61 const QDateTime dt = QDateTime::currentDateTime();
62 const QString pyFeatureVarName = QStringLiteral( "_qgis_feature_%1" ).arg( dt.toString( QStringLiteral( "yyyyMMddhhmmsszzz" ) ) );
63 const QString initFeature = QStringLiteral( "%1 = sip.wrapinstance( %2, qgis.core.QgsFeature )" )
64 .arg( pyFeatureVarName )
65 .arg( ( quint64 ) & form()->feature() );
66
67 QgsPythonRunner::run( initFeature );
68
69 const QString expr = QStringLiteral( "%1( %2, %3, %4)" )
70 .arg( mPyFunctionName,
71 mPyFormVarName,
72 mPyLayerVarName,
73 pyFeatureVarName );
74
76
77 const QString delFeature = QStringLiteral( "del %1" ).arg( pyFeatureVarName );
78 QgsPythonRunner::run( delFeature );
79}
QgsAttributeFormLegacyInterface(const QString &function, const QString &pyFormName, QgsAttributeForm *form)
QgsVectorLayer * layer()
Returns the layer for which this form is shown.
bool save()
Save all the values from the editors to the layer.
QString id
Definition qgsmaplayer.h:78
static bool run(const QString &command, const QString &messageOnError=QString())
Execute a Python statement.