QGIS API Documentation  3.20.0-Odense (decaadbb31)
qgsnewauxiliarylayerdialog.cpp
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1 /***************************************************************************
2  qgsnewauxiliarylayerdialog.cpp - description
3  -------------------
4  begin : Aug 28, 2017
5  copyright : (C) 2017 by Paul Blottiere
6  email : [email protected]
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 
19 #include "qgsauxiliarystorage.h"
20 #include "qgsproject.h"
21 #include "qgsgui.h"
22 
23 #include <QMessageBox>
24 #include <QPushButton>
25 
27  : QDialog( parent )
28  , mLayer( layer )
29 {
30  setupUi( this );
32 
33  const QgsFields fields = mLayer->fields();
34  for ( const QgsField &field : fields )
35  comboBox->addItem( field.name() );
36 
37  if ( fields.isEmpty() )
38  {
39  buttonBox->button( QDialogButtonBox::Ok )->setDisabled( true );
40  }
41 }
42 
44 {
45  const int idx = mLayer->fields().lookupField( comboBox->currentText() );
46 
47  if ( idx >= 0 )
48  {
49  const QgsField field = mLayer->fields().field( idx );
51 
52  if ( alayer )
53  {
54  mLayer->setAuxiliaryLayer( alayer );
55  }
56  else
57  {
58  QDialog::close();
59  const QString errMsg = QgsProject::instance()->auxiliaryStorage()->errorString();
60  QMessageBox::critical( this, tr( "New Auxiliary Layer" ), errMsg );
61  return;
62  }
63  }
64 
65  QDialog::accept();
66 }
Class allowing to manage the auxiliary storage for a vector layer.
QString errorString() const
Returns the underlying error string describing potential errors happening in saveAs().
QgsAuxiliaryLayer * createAuxiliaryLayer(const QgsField &field, QgsVectorLayer *layer) const
Creates an auxiliary layer for a vector layer.
Encapsulate a field in an attribute table or data source.
Definition: qgsfield.h:51
QString name
Definition: qgsfield.h:60
Container of fields for a vector layer.
Definition: qgsfields.h:45
QgsField field(int fieldIdx) const
Returns the field at particular index (must be in range 0..N-1).
Definition: qgsfields.cpp:168
bool isEmpty() const
Checks whether the container is empty.
Definition: qgsfields.cpp:128
int lookupField(const QString &fieldName) const
Looks up field's index from the field name.
Definition: qgsfields.cpp:344
static QgsGui * instance()
Returns a pointer to the singleton instance.
Definition: qgsgui.cpp:65
static void enableAutoGeometryRestore(QWidget *widget, const QString &key=QString())
Register the widget to allow its position to be automatically saved and restored when open and closed...
Definition: qgsgui.cpp:156
QgsNewAuxiliaryLayerDialog(QgsVectorLayer *layer, QWidget *parent=nullptr)
Constructor.
static QgsProject * instance()
Returns the QgsProject singleton instance.
Definition: qgsproject.cpp:467
const QgsAuxiliaryStorage * auxiliaryStorage() const
Returns the current const auxiliary storage.
Represents a vector layer which manages a vector based data sets.
void setAuxiliaryLayer(QgsAuxiliaryLayer *layer=nullptr)
Sets the current auxiliary layer.
QgsFields fields() const FINAL
Returns the list of fields of this layer.
const QgsField & field
Definition: qgsfield.h:463