QGIS API Documentation  2.11.0-Master
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 dot kuhn at gmx 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"
19 #include "qgsvectordataprovider.h"
20 
22  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
23  , mComboBox( NULL )
24 {
25 }
26 
27 
29 {
31 
32  if ( mComboBox )
33  value = mComboBox->itemData( mComboBox->currentIndex() );
34 
35  return value;
36 }
37 
39 {
40  return new QComboBox( parent );
41 }
42 
44 {
45  mComboBox = qobject_cast<QComboBox*>( editor );
46 
47  if ( mComboBox )
48  {
49  QStringList enumValues;
50  layer()->dataProvider()->enumValues( fieldIdx(), enumValues );
51 
52  Q_FOREACH ( const QString& s, enumValues )
53  {
54  mComboBox->addItem( s, s );
55  }
56  connect( mComboBox, SIGNAL( currentIndexChanged( int ) ), this, SLOT( valueChanged() ) );
57  }
58 }
59 
61 {
62  return mComboBox;
63 }
64 
66 {
67  if ( mComboBox )
68  {
69  mComboBox->setCurrentIndex( mComboBox->findData( value ) );
70  }
71 }
72 
void valueChanged()
Will call the value() method to determine the emitted value.
virtual void enumValues(int index, QStringList &enumList)
Returns the possible enum values of an attribute.
Manages an editor widget Widget and wrapper share the same parent.
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
QgsVectorLayer * layer()
Access the QgsVectorLayer, you are working on.
void addItem(const QString &text, const QVariant &userData)
QgsEnumerationWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=0, QWidget *parent=0)
QVariant value() override
Will be used to access the widget's value.
QVariant itemData(int index, int role) const
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
bool valid() override
Return true if the widget has been properly initialized.
int findData(const QVariant &data, int role, QFlags< Qt::MatchFlag > flags) const
void setValue(const QVariant &value) override
int fieldIdx()
Access the field index.
QgsVectorDataProvider * dataProvider()
Returns the data provider.
bool connect(const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
Represents a vector layer which manages a vector based data sets.