Wraps a value relation widget. More...

#include <qgsvaluerelationwidgetwrapper.h>

Inheritance diagram for QgsValueRelationWidgetWrapper:

Public Slots
void	setValue (const QVariant &value) override

Public Slots inherited from QgsEditorWidgetWrapper
void	emitValueChanged ()
	Will call the value() method to determine the emitted value. More...

void	setFeature (const QgsFeature &feature) override
	Will be called when the feature changes. More...

virtual void	setValue (const QVariant &value)=0
	Is called, when the value of the widget needs to be changed. More...

Public Slots inherited from QgsWidgetWrapper
virtual void	setFeature (const QgsFeature &feature)=0
	Is called, when the value of the widget needs to be changed. More...

Public Member Functions
	QgsValueRelationWidgetWrapper (QgsVectorLayer vl, int fieldIdx, QWidget editor=nullptr, QWidget *parent=nullptr)

void	setEnabled (bool enabled) override
	Is used to enable or disable the edit functionality of the managed widget. More...

void	showIndeterminateState () override
	Sets the widget to display in an indeterminate "mixed value" state. More...

QVariant	value () const override
	Will be used to access the widget's value. More...

Public Member Functions inherited from QgsEditorWidgetWrapper
	QgsEditorWidgetWrapper (QgsVectorLayer vl, int fieldIdx, QWidget editor=nullptr, QWidget *parent=nullptr)
	Create a new widget wrapper. More...

QString	constraintFailureReason () const
	Returns the reason why a constraint check has failed (or an empty string if constraint check was successful). More...

ConstraintResult	constraintResult () const
	Getter of constraintResult It's the current result of the constraint on the widget influencing it's visualization. More...

bool	constraintResultVisible () const
	Getter of constraintResultVisible Defines if the constraint result should be visualized on the widget (with color). More...

QVariant	defaultValue () const
	Access the default value of the field. More...

QgsField	field () const
	Access the field. More...

int	fieldIdx () const
	Access the field index. More...

bool	isBlockingCommit () const
	Returns true if the widget is preventing the feature from being committed. More...

bool	isValidConstraint () const
	Get the current constraint status. More...

void	setConstraintResultVisible (bool constraintResultVisible)
	Setter of constraintResultVisible Defines if the constraint result should be visualized on the widget (with color). More...

void	setEnabled (bool enabled) override
	Is used to enable or disable the edit functionality of the managed widget. More...

virtual void	setHint (const QString &hintText)
	Add a hint text on the widget. More...

void	updateConstraint (const QgsFeature &featureContext, QgsFieldConstraints::ConstraintOrigin constraintOrigin=QgsFieldConstraints::ConstraintOriginNotSet)
	Update constraint. More...

void	updateConstraint (const QgsVectorLayer *layer, int index, const QgsFeature &feature, QgsFieldConstraints::ConstraintOrigin constraintOrigin=QgsFieldConstraints::ConstraintOriginNotSet)
	Update constraint on a feature coming from a specific layer. More...

Public Member Functions inherited from QgsWidgetWrapper
	QgsWidgetWrapper (QgsVectorLayer vl, QWidget editor=nullptr, QWidget *parent=nullptr)
	Create a new widget wrapper. More...

QVariant	config (const QString &key, const QVariant &defaultVal=QVariant()) const
	Use this inside your overridden classes to access the configuration. More...

QVariantMap	config () const
	Returns the whole config. More...

const QgsAttributeEditorContext &	context () const
	Returns information about the context in which this widget is shown. More...

QgsPropertyCollection &	dataDefinedProperties ()
	Returns a reference to the editor widget's property collection, used for data defined overrides. More...

const QgsPropertyCollection &	dataDefinedProperties () const
	Returns a reference to the editor widget's property collection, used for data defined overrides. More...

QgsVectorLayer *	layer () const
	Access the QgsVectorLayer, you are working on. More...

void	setConfig (const QVariantMap &config)
	Will set the config of this wrapper to the specified config. More...

void	setContext (const QgsAttributeEditorContext &context)
	Set the context in which this widget is shown. More...

void	setDataDefinedProperties (const QgsPropertyCollection &collection)
	Sets the editor widget's property collection, used for data defined overrides. More...

QWidget *	widget ()
	Access the widget managed by this wrapper. More...

template<class T >
T *	widget ()
	Access the widget managed by this wrapper and cast it to a given type Example: QPushButton* pb = wrapper->widget<QPushButton*>();. More...

Protected Member Functions
QWidget *	createWidget (QWidget *parent) override
	This method should create a new widget with the provided parent. More...

void	initWidget (QWidget *editor) override
	This method should initialize the editor widget with runtime data. More...

bool	valid () const override
	Return true if the widget has been properly initialized. More...

Protected Member Functions inherited from QgsEditorWidgetWrapper
virtual void	updateConstraintWidgetStatus ()
	This should update the widget with a visual cue if a constraint status changed. More...

Friends
class	QgsValueRelationWidgetFactory

class	TestQgsValueRelationWidgetWrapper

Additional Inherited Members
Public Types inherited from QgsEditorWidgetWrapper
enum	ConstraintResult { ConstraintResultPass = 0, ConstraintResultFailHard, ConstraintResultFailSoft }
	Result of constraint checks. More...

Public Types inherited from QgsWidgetWrapper
enum	Property { RootPath = 0, DocumentViewerContent }
	Data defined properties for different editor widgets. More...

Signals inherited from QgsEditorWidgetWrapper
void	constraintResultVisibleChanged (bool visible)
	Emit this signal when the constraint result visibility changed. More...

void	constraintStatusChanged (const QString &constraint, const QString &desc, const QString &err, QgsEditorWidgetWrapper::ConstraintResult status)
	Emit this signal when the constraint status changed. More...

void	valueChanged (const QVariant &value)
	Emit this signal, whenever the value changed. More...

Static Public Member Functions inherited from QgsEditorWidgetWrapper
static QgsEditorWidgetWrapper *	fromWidget (QWidget *widget)
	Will return a wrapper for a given widget. More...

static bool	isInTable (const QWidget *parent)
	Check if the given widget or one of its parent is a QTableView. More...

Static Public Member Functions inherited from QgsWidgetWrapper
static QgsWidgetWrapper *	fromWidget (QWidget *widget)
	Will return a wrapper for a given widget. More...

static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the editor widget property definitions. More...

Protected Attributes inherited from QgsWidgetWrapper
QgsPropertyCollection	mPropertyCollection
	Data defined property collection. More...

Properties inherited from QgsEditorWidgetWrapper
ConstraintResult	constraintResult

bool	constraintResultVisible

Detailed Description

Wraps a value relation widget.

This widget will offer a combobox with values from another layer referenced by a foreign key (a constraint may be set but is not required on data level). This is useful for having value lists on a separate layer containing codes and their translation to human readable names.

Options:

Layer The id of the referenced layer.
Key The key field on the referenced layer (code).
Value The value field on the referenced layer (human readable name).
AllowMulti If set to True, will allow multiple selections. This requires the data type to be a string. This does NOT work with normalized database structures.
AllowNull Will offer NULL as a possible value.
FilterExpression If not empty, will be used as expression. Only if this evaluates to True, the value will be shown.
OrderByValue Will order by value instead of key.

Note: not available in Python bindings

Definition at line 52 of file qgsvaluerelationwidgetwrapper.h.

Constructor & Destructor Documentation

◆ QgsValueRelationWidgetWrapper()

QgsValueRelationWidgetWrapper::QgsValueRelationWidgetWrapper	(	QgsVectorLayer *	vl,
		int	fieldIdx,
		QWidget *	editor = `nullptr`,
		QWidget *	parent = `nullptr`
	)

explicit

Definition at line 30 of file qgsvaluerelationwidgetwrapper.cpp.

Member Function Documentation

◆ createWidget()

QWidget * QgsValueRelationWidgetWrapper::createWidget ( QWidget * parent )

overrideprotectedvirtual

This method should create a new widget with the provided parent.

This will only be called if the form did not already provide a widget, so it is not guaranteed to be called! You should not do initialization stuff, which also has to be done for custom editor widgets inside this method. Things like filling comboboxes and assigning other data which will also be used to make widgets on forms created in the QtDesigner usable should be assigned in initWidget().

Parameters

parent You should set this parent on the created widget.

Returns: A new widget

Implements QgsWidgetWrapper.

Definition at line 77 of file qgsvaluerelationwidgetwrapper.cpp.

◆ initWidget()

void QgsValueRelationWidgetWrapper::initWidget ( QWidget * editor )

overrideprotectedvirtual

This method should initialize the editor widget with runtime data.

Fill your comboboxes here.

Parameters

editor The widget which will represent this attribute editor in a form.

Reimplemented from QgsWidgetWrapper.

Definition at line 92 of file qgsvaluerelationwidgetwrapper.cpp.

◆ setEnabled()

void QgsValueRelationWidgetWrapper::setEnabled ( bool enabled )

overridevirtual

Is used to enable or disable the edit functionality of the managed widget.

By default this will not change the enabled state of the widget

Parameters

enabled Enable or Disable?

Reimplemented from QgsWidgetWrapper.

Definition at line 204 of file qgsvaluerelationwidgetwrapper.cpp.

◆ setValue

void QgsValueRelationWidgetWrapper::setValue ( const QVariant & value )

overrideslot

Definition at line 150 of file qgsvaluerelationwidgetwrapper.cpp.

◆ showIndeterminateState()

void QgsValueRelationWidgetWrapper::showIndeterminateState ( )

overridevirtual

Sets the widget to display in an indeterminate "mixed value" state.

Since: QGIS 2.16

Reimplemented from QgsEditorWidgetWrapper.

Definition at line 183 of file qgsvaluerelationwidgetwrapper.cpp.

◆ valid()

bool QgsValueRelationWidgetWrapper::valid ( ) const

overrideprotectedvirtual

Return true if the widget has been properly initialized.

This acts as hint for the calling party if this wrapper can be used after initializing it. If it cannot be used this is a hint to the caller that he may try to find another suitable widget type instead.

Returns: Validity status of this widget.

Since: QGIS 2.12

Implements QgsWidgetWrapper.

Definition at line 145 of file qgsvaluerelationwidgetwrapper.cpp.

◆ value()

QVariant QgsValueRelationWidgetWrapper::value ( ) const

overridevirtual

Will be used to access the widget's value.

Read the value from the widget and return it properly formatted to be saved in the attribute.

If an invalid variant is returned this will be interpreted as no change. Be sure to return a NULL QVariant if it should be set to NULL.

Returns: The current value the widget represents

Implements QgsEditorWidgetWrapper.

Definition at line 36 of file qgsvaluerelationwidgetwrapper.cpp.

Friends And Related Function Documentation

◆ QgsValueRelationWidgetFactory

friend class QgsValueRelationWidgetFactory

friend

Definition at line 83 of file qgsvaluerelationwidgetwrapper.h.

◆ TestQgsValueRelationWidgetWrapper

friend class TestQgsValueRelationWidgetWrapper

friend

Definition at line 84 of file qgsvaluerelationwidgetwrapper.h.

The documentation for this class was generated from the following files:

/tmp/buildd/qgis-3.0.2+14stretch/src/gui/editorwidgets/qgsvaluerelationwidgetwrapper.h
/tmp/buildd/qgis-3.0.2+14stretch/src/gui/editorwidgets/qgsvaluerelationwidgetwrapper.cpp

Public Slots

Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsValueRelationWidgetWrapper()

Member Function Documentation

◆ createWidget()

◆ initWidget()

◆ setEnabled()

◆ setValue

◆ showIndeterminateState()

◆ valid()

◆ value()

Friends And Related Function Documentation

◆ QgsValueRelationWidgetFactory

◆ TestQgsValueRelationWidgetWrapper