A collection of field items with some internal logic to retrieve the fields and a the vector layer instance from a connection URI, the schema and the table name. More...

#include <qgsfieldsitem.h>

Inheritance diagram for QgsFieldsItem:

[legend]

Public Member Functions
	QgsFieldsItem (QgsDataItem *parent, const QString &path, const QString &connectionUri, const QString &providerKey, const QString &schema, const QString &tableName)
	Constructor for QgsFieldsItem, with the specified parent item.

	~QgsFieldsItem () override

bool	canRenameFields () const
	Returns `true` if the connection supports renaming fields.

QString	connectionUri () const
	Returns the connection URI.

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

QIcon	icon () override

QgsVectorLayer *	layer ()
	Creates and returns a (possibly `nullptr`) layer from the connection URI and schema/table information.

QString	schema () const
	Returns the schema name.

QString	tableName () const
	Returns the table name.

QgsAbstractDatabaseProviderConnection::TableProperty *	tableProperty () const
	Returns the (possibly `nullptr`) properties of the table this fields belong to.

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

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 collection of field items with some internal logic to retrieve the fields and a the vector layer instance from a connection URI, the schema and the table name.

Since: QGIS 3.16

Definition at line 33 of file qgsfieldsitem.h.

Constructor & Destructor Documentation

◆ QgsFieldsItem()

QgsFieldsItem::QgsFieldsItem	(	QgsDataItem *	parent,
		const QString &	path,
		const QString &	connectionUri,
		const QString &	providerKey,
		const QString &	schema,
		const QString &	tableName
	)

Constructor for QgsFieldsItem, with the specified parent item.

The path argument gives the item path in the browser tree. The path string can take any form, but QgsDataItem items pointing to different logical locations should always use a different item path. The connectionUri argument is the connection part of the layer URI that it is used internally to create a connection and retrieve fields information. The providerKey string can be used to specify the key for the QgsDataItemProvider that created this item. The schema and tableName are used to retrieve the layer and field information from the connectionUri.

Definition at line 28 of file qgsfieldsitem.cpp.

◆ ~QgsFieldsItem()

QgsFieldsItem::~QgsFieldsItem ( )

override

Definition at line 59 of file qgsfieldsitem.cpp.

Member Function Documentation

◆ canRenameFields()

bool QgsFieldsItem::canRenameFields ( ) const

inline

Returns true if the connection supports renaming fields.

Since: QGIS 3.28

Definition at line 101 of file qgsfieldsitem.h.

◆ connectionUri()

QString QgsFieldsItem::connectionUri ( ) const

Returns the connection URI.

Definition at line 98 of file qgsfieldsitem.cpp.

◆ createChildren()

QVector< QgsDataItem * > QgsFieldsItem::createChildren ( )

overridevirtual

Create children.

Children are not expected to have parent set.

Warning: This method MUST BE THREAD SAFE.

Reimplemented from QgsDataItem.

Definition at line 64 of file qgsfieldsitem.cpp.

◆ icon()

QIcon QgsFieldsItem::icon ( )

overridevirtual

Reimplemented from QgsDataItem.

Definition at line 93 of file qgsfieldsitem.cpp.

◆ layer()

QgsVectorLayer * QgsFieldsItem::layer ( )

Creates and returns a (possibly nullptr) layer from the connection URI and schema/table information.

Definition at line 103 of file qgsfieldsitem.cpp.

◆ schema()

QString QgsFieldsItem::schema ( ) const

Returns the schema name.

Definition at line 145 of file qgsfieldsitem.cpp.

◆ tableName()

QString QgsFieldsItem::tableName ( ) const

Returns the table name.

Definition at line 140 of file qgsfieldsitem.cpp.

◆ tableProperty()

QgsAbstractDatabaseProviderConnection::TableProperty * QgsFieldsItem::tableProperty ( ) const

Returns the (possibly nullptr) properties of the table this fields belong to.

Since: QGIS 3.16

Definition at line 135 of file qgsfieldsitem.cpp.

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

/build/qgis-3.41.0+git20241116+25ec5511245+99sid/src/core/browser/qgsfieldsitem.h
/build/qgis-3.41.0+git20241116+25ec5511245+99sid/src/core/browser/qgsfieldsitem.cpp

Public Member Functions

Additional Inherited Members