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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( 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  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)
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.
bool valid() override
Return true if the widget has been properly initialized.
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:75