QGIS API Documentation  2.13.0-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 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"
19 #include "qgsfilterlineedit.h"
20 
21 #include <QCompleter>
22 #include <QSettings>
23 
25  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
26  , mComboBox( nullptr )
27  , mLineEdit( nullptr )
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 ( const 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  return mComboBox || mLineEdit;
106 }
107 
109 {
110  if ( mComboBox )
111  {
112  mComboBox->setCurrentIndex( mComboBox->findData( value ) );
113  }
114 
115  if ( mLineEdit )
116  {
117  if ( value.isNull() )
118  mLineEdit->setText( QSettings().value( "qgis/nullValue", "NULL" ).toString() );
119  else
120  mLineEdit->setText( value.toString() );
121  }
122 }
void setCaseSensitivity(Qt::CaseSensitivity caseSensitivity)
int fieldIdx() const
Access the field index.
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.
QgsField field() const
Access the field.
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.
void addItem(const QString &text, const QVariant &userData)
bool isNull() const
Lineedit with builtin clear button.
QVariant itemData(int index, int role) const
void setCompletionMode(CompletionMode mode)
void setValue(const QVariant &value) override
QVariant value(const QString &key, const QVariant &defaultValue) const
QgsUniqueValuesWidgetWrapper(QgsVectorLayer *vl, int fieldIdx, QWidget *editor=nullptr, QWidget *parent=nullptr)
QVariant value() const override
Will be used to access the widget&#39;s value.
int findData(const QVariant &data, int role, QFlags< Qt::MatchFlag > flags) const
bool valid() const override
Return true if the widget has been properly initialized.
QgsVectorLayer * layer() const
Access the QgsVectorLayer, you are working on.
QgsEditorWidgetConfig config() const
Returns the whole config.
void setNullValue(const QString &nullValue)
bool connect(const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QObject * parent() const
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:87