Manages an editor widget Widget and wrapper share the same parent. More...

#include <qgswidgetwrapper.h>

Inheritance diagram for QgsWidgetWrapper:

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

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

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

Signals
void	contextChanged ()
	Signal when QgsAttributeEditorContext mContext changed. More...

Public Member Functions
	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
	Returns the vector layer associated with the widget. More...

void	notifyAboutToSave ()
	Notify this widget, that the containing form is about to save and that any pending changes should be pushed to the edit buffer or they might be lost. 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...

virtual bool	valid () const =0
	Returns true if the widget has been properly initialized. 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...

Static Public Member Functions
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 Member Functions
virtual QWidget *	createWidget (QWidget *parent)=0
	This method should create a new widget with the provided parent. More...

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

Protected Attributes
QgsPropertyCollection	mPropertyCollection
	Data defined property collection. More...

Detailed Description

Manages an editor widget Widget and wrapper share the same parent.

A wrapper controls one attribute editor widget and is able to create a default widget or use a pre-existent widget. It is able to set the widget to the value implied by a field of a vector layer, or return the value it currently holds. Every time it is changed it has to emit a valueChanged signal. If it fails to do so, there is no guarantee that the changed status of the widget will be saved.

Definition at line 51 of file qgswidgetwrapper.h.

Member Enumeration Documentation

enum QgsWidgetWrapper::Property

Data defined properties for different editor widgets.

Enumerator
RootPath	Root path for external resource.
DocumentViewerContent	Document type for external resource.

Definition at line 73 of file qgswidgetwrapper.h.

Constructor & Destructor Documentation

QgsWidgetWrapper::QgsWidgetWrapper	(	QgsVectorLayer *	vl,
		QWidget *	editor = `nullptr`,
		QWidget *	parent = `nullptr`
	)

explicit

Create a new widget wrapper.

Parameters

vl	The layer on which the field is
editor	An editor widget. Can be NULL if one should be autogenerated.
parent	A parent widget for this widget wrapper and the created widget.

Definition at line 37 of file qgswidgetwrapper.cpp.

Member Function Documentation

QVariant QgsWidgetWrapper::config	(	const QString &	key,
		const QVariant &	defaultVal = `QVariant()`
	)		const

Use this inside your overridden classes to access the configuration.

Parameters

key	The configuration option you want to load
defaultVal	Default value

Returns: the value assigned to this configuration option

Definition at line 72 of file qgswidgetwrapper.cpp.

QVariantMap QgsWidgetWrapper::config ( ) const

Returns the whole config.

Definition at line 81 of file qgswidgetwrapper.cpp.

const QgsAttributeEditorContext & QgsWidgetWrapper::context ( ) const

Returns information about the context in which this widget is shown.

Definition at line 86 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::contextChanged ( )

signal

Signal when QgsAttributeEditorContext mContext changed.

Since: QGIS 3.4

virtual QWidget* QgsWidgetWrapper::createWidget ( QWidget * parent )

protectedpure virtual

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

Implemented in QgsRelationWidgetWrapper, QgsCheckboxSearchWidgetWrapper, QgsDateTimeSearchWidgetWrapper, QgsRelationReferenceSearchWidgetWrapper, QgsValueRelationWidgetWrapper, QgsDefaultSearchWidgetWrapper, QgsDateTimeEditWrapper, QgsRangeWidgetWrapper, QgsTextEditWrapper, QgsRelationReferenceWidgetWrapper, QgsValueRelationSearchWidgetWrapper, QgsCheckboxWidgetWrapper, QgsExternalResourceWidgetWrapper, QgsValueMapWidgetWrapper, QgsValueMapSearchWidgetWrapper, QgsUniqueValuesWidgetWrapper, QgsRelationAggregateSearchWidgetWrapper, QgsKeyValueWidgetWrapper, QgsListWidgetWrapper, QgsQmlWidgetWrapper, QgsUuidWidgetWrapper, QgsClassificationWidgetWrapper, QgsColorWidgetWrapper, QgsEnumerationWidgetWrapper, and QgsHiddenWidgetWrapper.

QgsPropertyCollection& QgsWidgetWrapper::dataDefinedProperties ( )

inline

Returns a reference to the editor widget's property collection, used for data defined overrides.

See also: setDataDefinedProperties()

Note: not available in Python bindings

Since: QGIS 3.0

Definition at line 179 of file qgswidgetwrapper.h.

const QgsPropertyCollection& QgsWidgetWrapper::dataDefinedProperties ( ) const

inline

Returns a reference to the editor widget's property collection, used for data defined overrides.

See also: setDataDefinedProperties(); Property

Since: QGIS 3.0

Definition at line 187 of file qgswidgetwrapper.h.

QgsWidgetWrapper * QgsWidgetWrapper::fromWidget ( QWidget * widget )

static

Will return a wrapper for a given widget.

Parameters

widget The widget which was created by a wrapper

Returns: The wrapper for the widget or NULL

Definition at line 96 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::initWidget ( QWidget * editor )

protectedvirtual

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 in QgsRelationWidgetWrapper, QgsCheckboxSearchWidgetWrapper, QgsDateTimeSearchWidgetWrapper, QgsRelationReferenceSearchWidgetWrapper, QgsValueRelationWidgetWrapper, QgsDefaultSearchWidgetWrapper, QgsDateTimeEditWrapper, QgsRangeWidgetWrapper, QgsTextEditWrapper, QgsRelationReferenceWidgetWrapper, QgsValueRelationSearchWidgetWrapper, QgsCheckboxWidgetWrapper, QgsExternalResourceWidgetWrapper, QgsValueMapWidgetWrapper, QgsValueMapSearchWidgetWrapper, QgsUniqueValuesWidgetWrapper, QgsKeyValueWidgetWrapper, QgsListWidgetWrapper, QgsQmlWidgetWrapper, QgsUuidWidgetWrapper, QgsClassificationWidgetWrapper, QgsColorWidgetWrapper, QgsEnumerationWidgetWrapper, and QgsHiddenWidgetWrapper.

Definition at line 106 of file qgswidgetwrapper.cpp.

QgsVectorLayer * QgsWidgetWrapper::layer ( ) const

Returns the vector layer associated with the widget.

Definition at line 91 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::notifyAboutToSave ( )

Notify this widget, that the containing form is about to save and that any pending changes should be pushed to the edit buffer or they might be lost.

Since: QGIS 3.2

Definition at line 101 of file qgswidgetwrapper.cpp.

const QgsPropertiesDefinition & QgsWidgetWrapper::propertyDefinitions ( )

static

Returns the editor widget property definitions.

Since: QGIS 3.0

Definition at line 22 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::setConfig ( const QVariantMap & config )

Will set the config of this wrapper to the specified config.

Parameters

config The config for this wrapper

Definition at line 61 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::setContext ( const QgsAttributeEditorContext & context )

Set the context in which this widget is shown.

Parameters

context context information

Definition at line 66 of file qgswidgetwrapper.cpp.

void QgsWidgetWrapper::setDataDefinedProperties ( const QgsPropertyCollection & collection )

inline

Sets the editor widget's property collection, used for data defined overrides.

Parameters

collection property collection. Existing properties will be replaced.

See also: dataDefinedProperties(); Property

Since: QGIS 3.0

Definition at line 196 of file qgswidgetwrapper.h.

void QgsWidgetWrapper::setEnabled ( bool enabled )

virtualslot

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 in QgsEditorWidgetWrapper, and QgsValueRelationWidgetWrapper.

Definition at line 111 of file qgswidgetwrapper.cpp.

virtual void QgsWidgetWrapper::setFeature ( const QgsFeature & feature )

pure virtualslot

Is called, when the value of the widget needs to be changed.

Update the widget representation to reflect the new value.

Parameters

feature The new feature

virtual bool QgsWidgetWrapper::valid ( ) const

pure virtual

Returns 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

Implemented in QgsRelationWidgetWrapper, QgsValueRelationWidgetWrapper, QgsDefaultSearchWidgetWrapper, QgsCheckboxSearchWidgetWrapper, QgsDateTimeEditWrapper, QgsRangeWidgetWrapper, QgsTextEditWrapper, QgsDateTimeSearchWidgetWrapper, QgsRelationReferenceSearchWidgetWrapper, QgsRelationReferenceWidgetWrapper, QgsCheckboxWidgetWrapper, QgsExternalResourceWidgetWrapper, QgsValueMapWidgetWrapper, QgsUniqueValuesWidgetWrapper, QgsKeyValueWidgetWrapper, QgsListWidgetWrapper, QgsRelationAggregateSearchWidgetWrapper, QgsUuidWidgetWrapper, QgsClassificationWidgetWrapper, QgsColorWidgetWrapper, QgsEnumerationWidgetWrapper, QgsValueRelationSearchWidgetWrapper, QgsQmlWidgetWrapper, QgsHiddenWidgetWrapper, and QgsValueMapSearchWidgetWrapper.

QWidget * QgsWidgetWrapper::widget ( )

Access the widget managed by this wrapper.

Returns: The widget

Definition at line 46 of file qgswidgetwrapper.cpp.

template<class T >

T* QgsWidgetWrapper::widget ( )

inline

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

Returns: The widget as template type or NULL, if it cannot be cast to this type.

Note: not available in Python bindings

Definition at line 110 of file qgswidgetwrapper.h.

Member Data Documentation

QgsPropertyCollection QgsWidgetWrapper::mPropertyCollection

protected

Data defined property collection.

Definition at line 239 of file qgswidgetwrapper.h.

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

/build/qgis-3.4.15+24xenial/src/gui/editorwidgets/core/qgswidgetwrapper.h
/build/qgis-3.4.15+24xenial/src/gui/editorwidgets/core/qgswidgetwrapper.cpp

Public Types

Public Slots

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation