A data item representing a single field from a layer. More...

#include <qgsfieldsitem.h>

Inheritance diagram for QgsFieldItem:

[legend]

Public Member Functions
	QgsFieldItem (QgsDataItem *parent, const QgsField &field)
	Constructor for QgsFieldItem, with the specified parent item and field.

	~QgsFieldItem () override

bool	equal (const QgsDataItem *other) override
	Returns `true` if this item is equal to another item (by testing item type and path).

QgsField	field () const
	Returns the field definition.

QIcon	icon () override

Public Member Functions inherited from QgsDataItem
	QgsDataItem (Qgis::BrowserItemType type, QgsDataItem *parent, const QString &name, const QString &path, const QString &providerKey=QString())
	Constructor for QgsDataItem, with the specified parent item.

	~QgsDataItem () override

virtual Q_DECL_DEPRECATED bool	acceptDrop ()
	Returns whether the item accepts drag and dropped layers - e.g.

virtual QList< QAction * >	actions (QWidget *parent)
	Returns the list of actions available for this item.

virtual void	addChildItem (QgsDataItem *child, bool refresh=false)
	Inserts a new child item.

virtual Qgis::BrowserItemCapabilities	capabilities2 () const
	Returns the capabilities for the data item.

QVector< QgsDataItem * >	children () const

virtual QVector< QgsDataItem * >	createChildren ()
	Create children.

virtual QgsAbstractDatabaseProviderConnection *	databaseConnection () const
	For data items that represent a DB connection or one of its children, this method returns a connection.

virtual void	deleteChildItem (QgsDataItem *child)
	Removes and deletes a child item, emitting relevant signals to the model.

virtual bool	handleDoubleClick ()
	Called when a user double clicks on the item.

virtual Q_DECL_DEPRECATED bool	handleDrop (const QMimeData *, Qt::DropAction)
	Attempts to process the mime data dropped on this item.

bool	hasChildren ()

virtual bool	hasDragEnabled () const
	Returns `true` if the item may be dragged.

virtual bool	layerCollection () const
	Returns `true` if the data item is a collection of layers The default implementation returns `false`, subclasses must implement this method if their children are layers.

virtual QList< QMenu * >	menus (QWidget *parent)
	Returns the list of menus available for this item.

virtual Q_DECL_DEPRECATED QgsMimeDataUtils::Uri	mimeUri () const
	Returns mime URI for the data item.

virtual QgsMimeDataUtils::UriList	mimeUris () const
	Returns mime URIs for the data item, most data providers will only return a single URI but some data collection items (e.g.

void	moveToThread (QThread *targetThread)
	Move object and all its descendants to thread.

QString	name () const
	Returns the name of the item (the displayed text for the item).

virtual Q_DECL_DEPRECATED QWidget *	paramWidget ()
	Returns source widget from data item for QgsBrowserPropertiesWidget.

QgsDataItem *	parent () const
	Gets item parent.

QString	path () const

QString	providerKey () const
	Returns the provider key that created this item (e.g.

virtual QgsDataItem *	removeChildItem (QgsDataItem *child)
	Removes a child item and returns it without deleting it.

virtual Q_DECL_DEPRECATED bool	rename (const QString &name)
	Sets a new name for the item, and returns `true` if the item was successfully renamed.

int	rowCount ()

Q_DECL_DEPRECATED void	setCapabilities (int capabilities)

virtual void	setCapabilities (Qgis::BrowserItemCapabilities capabilities)
	Sets the capabilities for the data item.

virtual Q_DECL_DEPRECATED bool	setCrs (const QgsCoordinateReferenceSystem &crs)
	Writes the selected crs into data source.

void	setIcon (const QIcon &icon)

void	setIconName (const QString &iconName)

void	setName (const QString &name)
	Sets the name of the item (the displayed text for the item).

void	setParent (QgsDataItem *parent)
	Set item parent and connect / disconnect parent to / from item signals.

void	setPath (const QString &path)

void	setProviderKey (const QString &value)
	Sets the provider key that created this item (e.g.

void	setSortKey (const QVariant &key)
	Sets a custom sorting key for the item.

virtual void	setState (Qgis::BrowserItemState state)
	Set item state.

void	setToolTip (const QString &msg)

virtual QVariant	sortKey () const
	Returns the sorting key for the item.

Qgis::BrowserItemState	state () const

QString	toolTip () const

Qgis::BrowserItemType	type () const

Additional Inherited Members
Public Slots inherited from QgsDataItem
virtual void	childrenCreated ()

virtual void	deleteLater ()
	Safely delete the item:

virtual void	depopulate ()
	Remove children recursively and set as not populated. This is used when refreshing collapsed items.

virtual void	populate (bool foreground=false)

virtual void	refresh ()

virtual void	refreshConnections (const QString &providerKey=QString())
	Causes a data item provider to refresh all registered connections.

Signals inherited from QgsDataItem
void	beginInsertItems (QgsDataItem *parent, int first, int last)
	Emitted before child items are added to this data item.

void	beginRemoveItems (QgsDataItem *parent, int first, int last)
	Emitted before child items are removed from this data item.

void	connectionsChanged (const QString &providerKey=QString())
	Emitted when the connections of the provider with the specified providerKey have changed.

void	dataChanged (QgsDataItem *item)
	Emitted when data changes for an item.

void	endInsertItems ()
	Emitted after child items have been added to this data item.

void	endRemoveItems ()
	Emitted after child items have been removed from this data item.

void	stateChanged (QgsDataItem *item, Qgis::BrowserItemState oldState)
	Emitted when an item's state is changed.

Static Public Member Functions inherited from QgsDataItem
static void	deleteLater (QVector< QgsDataItem * > &items)

template<class T >
static QList< T * >	filteredItems (const QList< QgsDataItem * > &items)
	Returns a filtered list of data items which match the template type.

static int	findItem (QVector< QgsDataItem * > items, QgsDataItem *item)

static QString	pathComponent (const QString &component)
	Create path component replacing path separators.

Protected Slots inherited from QgsDataItem
void	updateIcon ()
	Will request a repaint of this icon.

Protected Member Functions inherited from QgsDataItem
bool	deferredDelete ()
	The item is scheduled to be deleted.

virtual void	populate (const QVector< QgsDataItem * > &children)

virtual void	refresh (const QVector< QgsDataItem * > &children)
	Refresh the items from a specified list of child items.

Protected Attributes inherited from QgsDataItem
Qgis::BrowserItemCapabilities	mCapabilities = Qgis::BrowserItemCapability::NoCapabilities

QVector< QgsDataItem * >	mChildren

QIcon	mIcon

QMap< QString, QIcon >	mIconMap

QString	mIconName

QString	mName

QgsDataItem *	mParent = nullptr

QString	mPath

QString	mProviderKey

QVariant	mSortKey
	Custom sort key. If invalid, name() will be used for sorting instead.

Qgis::BrowserItemState	mState = Qgis::BrowserItemState::NotPopulated

QString	mToolTip

Qgis::BrowserItemType	mType

Detailed Description

A data item representing a single field from a layer.

Information about the connection URI, the schema and the table as well as the layer instance the field belongs to can be retrieved from the parent QgsFieldsItem object.

Since: QGIS 3.16

Definition at line 122 of file qgsfieldsitem.h.

Constructor & Destructor Documentation

◆ QgsFieldItem()

QgsFieldItem::QgsFieldItem	(	QgsDataItem *	parent,
		const QgsField &	field
	)

Constructor for QgsFieldItem, with the specified parent item and field.

Note: parent item must be a QgsFieldsItem

Definition at line 150 of file qgsfieldsitem.cpp.

◆ ~QgsFieldItem()

QgsFieldItem::~QgsFieldItem ( )

override

Definition at line 166 of file qgsfieldsitem.cpp.

Member Function Documentation

◆ equal()

bool QgsFieldItem::equal ( const QgsDataItem * other )

overridevirtual

Returns true if this item is equal to another item (by testing item type and path).

Reimplemented from QgsDataItem.

Definition at line 206 of file qgsfieldsitem.cpp.

◆ field()

QgsField QgsFieldItem::field ( ) const

inline

Returns the field definition.

Since: QGIS 3.26

Definition at line 151 of file qgsfieldsitem.h.

◆ icon()

QIcon QgsFieldItem::icon ( )