The QgsFieldComboBox is a combo box which displays the list of fields of a given layer. More...

#include <qgsfieldcombobox.h>

Inheritance diagram for QgsFieldComboBox:

Public Slots
void	setField (const QString &fieldName)
	setField sets the currently selected field More...

void	setLayer (QgsMapLayer *layer)
	Sets the layer for which fields are listed in the combobox. More...

Signals
void	fieldChanged (const QString &fieldName)
	the signal is emitted when the currently selected field changes More...

Public Member Functions
	QgsFieldComboBox (QWidget *parent=nullptr)
	QgsFieldComboBox creates a combo box to display the fields of a layer. More...

bool	allowEmptyFieldName () const
	Returns true if the combo box allows the empty field ("not set") choice. More...

QString	currentField () const
	return the currently selected field More...

QgsFieldProxyModel::Filters	filters () const
	currently used filter on list of fields More...

QgsVectorLayer *	layer () const
	Returns the layer currently associated with the combobox. More...

void	setAllowEmptyFieldName (bool allowEmpty)
	Sets whether an optional empty field ("not set") option is shown in the combo box. More...

void	setFilters (QgsFieldProxyModel::Filters filters)
	setFilters allows fitering according to the type of field More...

Protected Slots
void	indexChanged (int i)

Properties
bool	allowEmptyFieldName

QgsFieldProxyModel::Filters	filters

Detailed Description

The QgsFieldComboBox is a combo box which displays the list of fields of a given layer.

It might be combined with a QgsMapLayerComboBox to automatically update fields according to a chosen layer. If expression must be used, QgsFieldExpressionWidget shall be used instead.

See also: QgsMapLayerComboBox

Since: QGIS 2.3

Definition at line 37 of file qgsfieldcombobox.h.

Constructor & Destructor Documentation

◆ QgsFieldComboBox()

QgsFieldComboBox::QgsFieldComboBox ( QWidget * parent = nullptr )

explicit

QgsFieldComboBox creates a combo box to display the fields of a layer.

The layer can be either manually given or dynamically set by connecting the signal QgsMapLayerComboBox::layerChanged to the slot setLayer.

Definition at line 22 of file qgsfieldcombobox.cpp.

Member Function Documentation

◆ allowEmptyFieldName()

bool QgsFieldComboBox::allowEmptyFieldName ( ) const

Returns true if the combo box allows the empty field ("not set") choice.

See also: setAllowEmptyFieldName()

Since: QGIS 3.0

◆ currentField()

QString QgsFieldComboBox::currentField ( ) const

return the currently selected field

Definition at line 73 of file qgsfieldcombobox.cpp.

◆ fieldChanged

void QgsFieldComboBox::fieldChanged ( const QString & fieldName )

signal

the signal is emitted when the currently selected field changes

◆ filters()

QgsFieldProxyModel::Filters QgsFieldComboBox::filters ( ) const

inline

currently used filter on list of fields

Definition at line 55 of file qgsfieldcombobox.h.

◆ indexChanged

void QgsFieldComboBox::indexChanged ( int i )

protectedslot

Definition at line 87 of file qgsfieldcombobox.cpp.

◆ layer()

QgsVectorLayer * QgsFieldComboBox::layer ( ) const

Returns the layer currently associated with the combobox.

See also: setLayer()

Definition at line 52 of file qgsfieldcombobox.cpp.

◆ setAllowEmptyFieldName()

void QgsFieldComboBox::setAllowEmptyFieldName ( bool allowEmpty )

Sets whether an optional empty field ("not set") option is shown in the combo box.

See also: allowEmptyFieldName()

Since: QGIS 3.0

Definition at line 36 of file qgsfieldcombobox.cpp.

◆ setField

void QgsFieldComboBox::setField ( const QString & fieldName )

slot

setField sets the currently selected field

Definition at line 57 of file qgsfieldcombobox.cpp.

◆ setFilters()

void QgsFieldComboBox::setFilters ( QgsFieldProxyModel::Filters filters )

setFilters allows fitering according to the type of field

Definition at line 31 of file qgsfieldcombobox.cpp.

◆ setLayer

void QgsFieldComboBox::setLayer ( QgsMapLayer * layer )

slot

Sets the layer for which fields are listed in the combobox.

If no layer is set or a non-vector layer is set then the combobox will be empty.

See also: layer()

Definition at line 46 of file qgsfieldcombobox.cpp.

Property Documentation

◆ allowEmptyFieldName

bool QgsFieldComboBox::allowEmptyFieldName

readwrite

Definition at line 41 of file qgsfieldcombobox.h.

◆ filters

QgsFieldProxyModel::Filters QgsFieldComboBox::filters