QGIS API Documentation  2.99.0-Master (37c43df)
qgsvaluemapwidgetwrapper.cpp
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1 /***************************************************************************
2  qgsvaluemapwidgetwrapper.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 #include "qgsvaluemapconfigdlg.h"
18 
19 #include <QSettings>
20 
21 QgsValueMapWidgetWrapper::QgsValueMapWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* editor, QWidget* parent )
22  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
23  , mComboBox( nullptr )
24 {
25 }
26 
27 
29 {
30  QVariant v;
31 
32  if ( mComboBox )
33  v = mComboBox->currentData();
34 
35  if ( v == QStringLiteral( VALUEMAP_NULL_TEXT ) )
36  v = QVariant( field().type() );
37 
38  return v;
39 }
40 
42 {
43  if ( mComboBox )
44  {
45  whileBlocking( mComboBox )->setCurrentIndex( -1 );
46  }
47 }
48 
49 QWidget* QgsValueMapWidgetWrapper::createWidget( QWidget* parent )
50 {
51  return new QComboBox( parent );
52 }
53 
54 void QgsValueMapWidgetWrapper::initWidget( QWidget* editor )
55 {
56  mComboBox = qobject_cast<QComboBox*>( editor );
57 
58  if ( mComboBox )
59  {
60  const QgsEditorWidgetConfig cfg = config();
61  QgsEditorWidgetConfig::ConstIterator it = cfg.constBegin();
62 
63  while ( it != cfg.constEnd() )
64  {
65  mComboBox->addItem( it.key(), it.value() );
66  ++it;
67  }
68  connect( mComboBox, SIGNAL( currentIndexChanged( int ) ), this, SLOT( valueChanged() ) );
69  }
70 }
71 
73 {
74  return mComboBox;
75 }
76 
78 {
79  QString v;
80  if ( value.isNull() )
81  v = QStringLiteral( VALUEMAP_NULL_TEXT );
82  else
83  v = value.toString();
84 
85  if ( mComboBox )
86  mComboBox->setCurrentIndex( mComboBox->findData( v ) );
87 }
void setValue(const QVariant &value) override
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
QVariant value() const override
Will be used to access the widget&#39;s value.
void valueChanged()
Will call the value() method to determine the emitted value.
QgsField field() const
Access the field.
bool valid() const override
Return true if the widget has been properly initialized.
Manages an editor widget Widget and wrapper share the same parent.
QVariantMap QgsEditorWidgetConfig
Holds a set of configuration parameters for a editor widget wrapper.
QgsValueMapWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=nullptr, QWidget *parent=nullptr)
void showIndeterminateState() override
Sets the widget to display in an indeterminate "mixed value" state.
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
Definition: qgis.h:176
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
QgsEditorWidgetConfig config() const
Returns the whole config.
Represents a vector layer which manages a vector based data sets.
#define VALUEMAP_NULL_TEXT