QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsenumerationwidgetwrapper.cpp
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1/***************************************************************************
2 qgsenumerationwidgetwrapper.cpp
3 --------------------------------------
4 Date : 5.1.2014
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 "qgsvectorlayer.h"
20
21QgsEnumerationWidgetWrapper::QgsEnumerationWidgetWrapper( QgsVectorLayer *layer, int fieldIdx, QWidget *editor, QWidget *parent )
22 : QgsEditorWidgetWrapper( layer, fieldIdx, editor, parent )
23
24{
25}
26
27
29{
30 QVariant value;
31
32 if ( mComboBox )
33 value = mComboBox->currentData();
34
35 return value;
36}
37
39{
40 if ( mComboBox )
41 {
42 whileBlocking( mComboBox )->setCurrentIndex( -1 );
43 }
44}
45
47{
48 return new QComboBox( parent );
49}
50
52{
53 mComboBox = qobject_cast<QComboBox *>( editor );
54
55 if ( mComboBox )
56 {
57 QStringList enumValues;
58 layer()->dataProvider()->enumValues( fieldIdx(), enumValues );
59
60 const auto constEnumValues = enumValues;
61 for ( const QString &s : constEnumValues )
62 {
63 mComboBox->addItem( s, s );
64 }
65 connect( mComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ),
66 this, static_cast<void ( QgsEditorWidgetWrapper::* )()>( &QgsEditorWidgetWrapper::emitValueChanged ) );
67 }
68}
69
71{
72 return mComboBox;
73}
74
75void QgsEnumerationWidgetWrapper::updateValues( const QVariant &value, const QVariantList & )
76{
77 if ( mComboBox )
78 {
79 mComboBox->setCurrentIndex( mComboBox->findData( value ) );
80 }
81}
82
Manages an editor widget Widget and wrapper share the same parent.
int fieldIdx() const
Access the field index.
void emitValueChanged()
Will call the value() method to determine the emitted value.
QVariant value() const override
Will be used to access the widget's value.
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
bool valid() const override
Returns true if the widget has been properly initialized.
QgsEnumerationWidgetWrapper(QgsVectorLayer *layer, int fieldIdx, QWidget *editor=nullptr, QWidget *parent=nullptr)
Constructor for QgsEnumerationWidgetWrapper.
void showIndeterminateState() override
Sets the widget to display in an indeterminate "mixed value" state.
virtual void enumValues(int index, QStringList &enumList) const
Returns the possible enum values of an attribute.
Represents a vector layer which manages a vector based data sets.
QgsVectorDataProvider * dataProvider() FINAL
Returns the layer's data provider, it may be nullptr.
QgsVectorLayer * layer() const
Returns the vector layer associated with the widget.
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
Definition: qgis.h:2322