QGIS API Documentation  2.11.0-Master
qgsuniquevaluewidgetwrapper.cpp
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1 /***************************************************************************
2  qgsuniquevaluewidgetwrapper.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 "qgsfilterlineedit.h"
20 
21 #include <QCompleter>
22 #include <QSettings>
23 
25  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
26  , mComboBox( NULL )
27  , mLineEdit( NULL )
28 {
29 }
30 
32 {
34 
35  if ( mComboBox )
36  value = mComboBox->itemData( mComboBox->currentIndex() );
37 
38  if ( mLineEdit )
39  {
40  if ( mLineEdit->text() == QSettings().value( "qgis/nullValue", "NULL" ).toString() )
41  value = QVariant( field().type() );
42  else
43  value = mLineEdit->text();
44  }
45 
46  return value;
47 }
48 
50 {
51  if ( config( "Editable" ).toBool() )
52  return new QgsFilterLineEdit( parent );
53  else
54  return new QComboBox( parent );
55 }
56 
58 {
59  mComboBox = qobject_cast<QComboBox*>( editor );
60  mLineEdit = qobject_cast<QLineEdit*>( editor );
61 
62  QStringList sValues;
63 
64  QList<QVariant> values;
65 
66  layer()->uniqueValues( fieldIdx(), values );
67 
68  Q_FOREACH ( QVariant v, values )
69  {
70  if ( mComboBox )
71  {
72  mComboBox->addItem( v.toString(), v );
73  }
74 
75  if ( mLineEdit )
76  {
77  sValues << v.toString();
78  }
79  }
80 
81  if ( mLineEdit )
82  {
83  QgsFilterLineEdit* fle = qobject_cast<QgsFilterLineEdit*>( editor );
84  if ( fle && !( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) )
85  {
86  fle->setNullValue( QSettings().value( "qgis/nullValue", "NULL" ).toString() );
87  }
88 
89  QCompleter* c = new QCompleter( sValues );
90  c->setCaseSensitivity( Qt::CaseInsensitive );
91  c->setCompletionMode( QCompleter::PopupCompletion );
92  mLineEdit->setCompleter( c );
93 
94  connect( mLineEdit, SIGNAL( textChanged( QString ) ), this, SLOT( valueChanged( QString ) ) );
95  }
96 
97  if ( mComboBox )
98  {
99  connect( mComboBox, SIGNAL( currentIndexChanged( int ) ), this, SLOT( valueChanged() ) );
100  }
101 }
102 
104 {
105  if ( mComboBox )
106  {
107  mComboBox->setCurrentIndex( mComboBox->findData( value ) );
108  }
109 
110  if ( mLineEdit )
111  {
112  if ( value.isNull() )
113  mLineEdit->setText( QSettings().value( "qgis/nullValue", "NULL" ).toString() );
114  else
115  mLineEdit->setText( value.toString() );
116  }
117 }
void setCaseSensitivity(Qt::CaseSensitivity caseSensitivity)
void valueChanged()
Will call the value() method to determine the emitted value.
void uniqueValues(int index, QList< QVariant > &uniqueValues, int limit=-1)
Returns unique values for column.
Manages an editor widget Widget and wrapper share the same parent.
QWidget * createWidget(QWidget *parent) override
This method should create a new widget with the provided parent.
QgsVectorLayer * layer()
Access the QgsVectorLayer, you are working on.
QgsField field()
Access the field.
void initWidget(QWidget *editor) override
This method should initialize the editor widget with runtime data.
void addItem(const QString &text, const QVariant &userData)
QVariant value() override
Will be used to access the widget's value.
bool isNull() const
const QgsEditorWidgetConfig config()
Returns the whole config.
Lineedit with builtin clear button.
void setNullValue(QString nullValue)
QVariant itemData(int index, int role) const
void setCompletionMode(CompletionMode mode)
QgsUniqueValuesWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=0, QWidget *parent=0)
void setValue(const QVariant &value) override
QVariant value(const QString &key, const QVariant &defaultValue) const
int findData(const QVariant &data, int role, QFlags< Qt::MatchFlag > flags) const
int fieldIdx()
Access the field index.
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.
QString toString() const
QVariant::Type type() const
Gets variant type of the field as it will be retrieved from data source.
Definition: qgsfield.cpp:74