The QgsMapLayerModel class is a model to display layers in widgets. More...

#include <qgsmaplayermodel.h>

Inheritance diagram for QgsMapLayerModel:

Public Types
enum	ItemDataRole { LayerIdRole = Qt::UserRole + 1 , LayerRole , EmptyRole , AdditionalRole }
	Item data roles. More...

Public Member Functions
	QgsMapLayerModel (const QList< QgsMapLayer * > &layers, QObject parent=nullptr, QgsProject project=nullptr)
	QgsMapLayerModel creates a model to display a specific list of layers in a widget. More...

	QgsMapLayerModel (QObject parent=nullptr, QgsProject project=nullptr)
	QgsMapLayerModel creates a model to display layers in widgets. More...

QStringList	additionalItems () const
	Returns the list of additional (non map layer) items included at the end of the model. More...

bool	allowEmptyLayer () const
	Returns `true` if the model allows the empty layer ("not set") choice. More...

bool	canDropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override

void	checkAll (Qt::CheckState checkState)
	checkAll changes the checkstate for all the layers More...

int	columnCount (const QModelIndex &parent=QModelIndex()) const override

QVariant	data (const QModelIndex &index, int role=Qt::DisplayRole) const override

bool	dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override

Qt::ItemFlags	flags (const QModelIndex &index) const override

QModelIndex	index (int row, int column, const QModelIndex &parent=QModelIndex()) const override

QModelIndex	indexFromLayer (QgsMapLayer *layer) const
	indexFromLayer returns the model index for a given layer More...

bool	insertRows (int row, int count, const QModelIndex &parent=QModelIndex()) override

bool	itemsCanBeReordered () const
	Returns `true` if items in the model can be reordered via drag and drop. More...

bool	itemsCheckable () const
	returns if the items can be checked or not More...

QgsMapLayer *	layerFromIndex (const QModelIndex &index) const
	Returns the map layer corresponding to the specified index. More...

QList< QgsMapLayer * >	layersChecked (Qt::CheckState checkState=Qt::Checked)
	layersChecked returns the list of layers which are checked (or unchecked) More...

QMimeData *	mimeData (const QModelIndexList &indexes) const override

QStringList	mimeTypes () const override

QModelIndex	parent (const QModelIndex &child) const override

bool	removeRows (int row, int count, const QModelIndex &parent=QModelIndex()) override

QHash< int, QByteArray >	roleNames () const override
	Returns strings for all roles supported by this model. More...

int	rowCount (const QModelIndex &parent=QModelIndex()) const override

void	setAdditionalItems (const QStringList &items)
	Sets a list of additional (non map layer) items to include at the end of the model. More...

void	setAllowEmptyLayer (bool allowEmpty, const QString &text=QString(), const QIcon &icon=QIcon())
	Sets whether an optional empty layer ("not set") option is present in the model. More...

bool	setData (const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override

void	setItemsCanBeReordered (bool allow)
	Sets whether items in the model can be reordered via drag and drop. More...

void	setItemsCheckable (bool checkable)
	setItemsCheckable defines if layers should be selectable in the widget More...

void	setLayersChecked (const QList< QgsMapLayer * > &layers)
	Sets which layers are checked in the model. More...

void	setShowCrs (bool showCrs)
	Sets whether the CRS of layers is also included in the model's display role. More...

bool	showCrs () const
	Returns `true` if the model includes layer's CRS in the display role. More...

Qt::DropActions	supportedDropActions () const override

Static Public Member Functions
static QIcon	iconForLayer (QgsMapLayer *layer)
	Returns the icon corresponding to a specified map layer. More...

Protected Slots
void	addLayers (const QList< QgsMapLayer * > &layers)

void	removeLayers (const QStringList &layerIds)

Protected Attributes
bool	mCanReorder = false

bool	mItemCheckable = false

QList< QgsMapLayer * >	mLayers

QMap< QString, Qt::CheckState >	mLayersChecked

QgsProject *	mProject = nullptr

Properties
QStringList	additionalItems

bool	allowEmptyLayer

bool	itemsCheckable

bool	showCrs

Detailed Description

The QgsMapLayerModel class is a model to display layers in widgets.

See also: QgsMapLayerProxyModel to sort and/filter the layers; QgsFieldModel to combine in with a field selector.

Since: QGIS 2.3

Definition at line 37 of file qgsmaplayermodel.h.

Member Enumeration Documentation

◆ ItemDataRole

enum QgsMapLayerModel::ItemDataRole

Item data roles.

Enumerator
LayerIdRole	Stores the map layer ID.
LayerRole	Stores pointer to the map layer itself.
EmptyRole	True if index corresponds to the empty (not set) value.
AdditionalRole	True if index corresponds to an additional (non map layer) item.

Definition at line 49 of file qgsmaplayermodel.h.

Constructor & Destructor Documentation

◆ QgsMapLayerModel() [1/2]

QgsMapLayerModel::QgsMapLayerModel	(	QObject *	parent = `nullptr`,
		QgsProject *	project = `nullptr`
	)

explicit

QgsMapLayerModel creates a model to display layers in widgets.

If a specific project is not specified then the QgsProject::instance() project will be used to populate the model.

Definition at line 33 of file qgsmaplayermodel.cpp.

◆ QgsMapLayerModel() [2/2]

QgsMapLayerModel::QgsMapLayerModel	(	const QList< QgsMapLayer * > &	layers,
		QObject *	parent = `nullptr`,
		QgsProject *	project = `nullptr`
	)

explicit

QgsMapLayerModel creates a model to display a specific list of layers in a widget.

If a specific project is not specified then the QgsProject::instance() project will be used to populate the model.

Definition at line 25 of file qgsmaplayermodel.cpp.

Member Function Documentation

◆ additionalItems()

QStringList QgsMapLayerModel::additionalItems ( ) const

inline

Returns the list of additional (non map layer) items included at the end of the model.

See also: setAdditionalItems()

Since: QGIS 3.0

Definition at line 171 of file qgsmaplayermodel.h.

◆ addLayers

void QgsMapLayerModel::addLayers ( const QList< QgsMapLayer * > & layers )

protectedslot

Definition at line 184 of file qgsmaplayermodel.cpp.

◆ allowEmptyLayer()

bool QgsMapLayerModel::allowEmptyLayer ( ) const

inline

Returns true if the model allows the empty layer ("not set") choice.

See also: setAllowEmptyLayer()

Since: QGIS 3.0

Definition at line 115 of file qgsmaplayermodel.h.

◆ canDropMimeData()

bool QgsMapLayerModel::canDropMimeData	(	const QMimeData *	data,
		Qt::DropAction	action,
		int	row,
		int	column,
		const QModelIndex &	parent
	)		const

override

Definition at line 447 of file qgsmaplayermodel.cpp.

◆ checkAll()

void QgsMapLayerModel::checkAll ( Qt::CheckState checkState )

checkAll changes the checkstate for all the layers

Definition at line 57 of file qgsmaplayermodel.cpp.

◆ columnCount()

int QgsMapLayerModel::columnCount ( const QModelIndex & parent = QModelIndex() ) const

override

Definition at line 237 of file qgsmaplayermodel.cpp.

◆ data()

QVariant QgsMapLayerModel::data	(	const QModelIndex &	index,
		int	role = `Qt::DisplayRole`
	)		const

override

Definition at line 244 of file qgsmaplayermodel.cpp.

◆ dropMimeData()

bool QgsMapLayerModel::dropMimeData	(	const QMimeData *	data,
		Qt::DropAction	action,
		int	row,
		int	column,
		const QModelIndex &	parent
	)

override

Definition at line 478 of file qgsmaplayermodel.cpp.

◆ flags()

Qt::ItemFlags QgsMapLayerModel::flags ( const QModelIndex & index ) const

override

Definition at line 369 of file qgsmaplayermodel.cpp.

◆ iconForLayer()

QIcon QgsMapLayerModel::iconForLayer ( QgsMapLayer * layer )

static

Returns the icon corresponding to a specified map layer.

Since: QGIS 3.0

Definition at line 517 of file qgsmaplayermodel.cpp.

◆ index()

QModelIndex QgsMapLayerModel::index	(	int	row,
		int	column,
		const QModelIndex &	parent = `QModelIndex()`
	)		const

override

Definition at line 203 of file qgsmaplayermodel.cpp.

◆ indexFromLayer()

QModelIndex QgsMapLayerModel::indexFromLayer ( QgsMapLayer * layer ) const

indexFromLayer returns the model index for a given layer

See also: layerFromIndex()

Definition at line 125 of file qgsmaplayermodel.cpp.

◆ insertRows()

bool QgsMapLayerModel::insertRows	(	int	row,
		int	count,
		const QModelIndex &	parent = `QModelIndex()`
	)

override

Definition at line 396 of file qgsmaplayermodel.cpp.

◆ itemsCanBeReordered()

bool QgsMapLayerModel::itemsCanBeReordered ( ) const

Returns true if items in the model can be reordered via drag and drop.

See also: setItemsCanBeReordered()

Since: QGIS 3.14

Definition at line 52 of file qgsmaplayermodel.cpp.

◆ itemsCheckable()

bool QgsMapLayerModel::itemsCheckable ( ) const

inline

returns if the items can be checked or not

Definition at line 142 of file qgsmaplayermodel.h.

◆ layerFromIndex()

QgsMapLayer * QgsMapLayerModel::layerFromIndex ( const QModelIndex & index ) const

Returns the map layer corresponding to the specified index.

See also: indexFromLayer()

Since: QGIS 3.0

Definition at line 133 of file qgsmaplayermodel.cpp.

◆ layersChecked()

QList< QgsMapLayer * > QgsMapLayerModel::layersChecked ( Qt::CheckState checkState = Qt::Checked )

layersChecked returns the list of layers which are checked (or unchecked)

Definition at line 97 of file qgsmaplayermodel.cpp.

◆ mimeData()

QMimeData * QgsMapLayerModel::mimeData ( const QModelIndexList & indexes ) const

override

Definition at line 454 of file qgsmaplayermodel.cpp.

◆ mimeTypes()

QStringList QgsMapLayerModel::mimeTypes ( ) const

override

Definition at line 440 of file qgsmaplayermodel.cpp.

◆ parent()

QModelIndex QgsMapLayerModel::parent ( const QModelIndex & child ) const

override

Definition at line 222 of file qgsmaplayermodel.cpp.

◆ removeLayers

void QgsMapLayerModel::removeLayers ( const QStringList & layerIds )

protectedslot

Definition at line 163 of file qgsmaplayermodel.cpp.

◆ removeRows()

bool QgsMapLayerModel::removeRows	(	int	row,
		int	count,
		const QModelIndex &	parent = `QModelIndex()`
	)

override

Definition at line 413 of file qgsmaplayermodel.cpp.

◆ roleNames()

QHash< int, QByteArray > QgsMapLayerModel::roleNames ( ) const

override

Returns strings for all roles supported by this model.

Note: Available only with Qt5 (Python and c++)

Definition at line 360 of file qgsmaplayermodel.cpp.

◆ rowCount()

int QgsMapLayerModel::rowCount ( const QModelIndex & parent = QModelIndex() ) const

override

Definition at line 229 of file qgsmaplayermodel.cpp.

◆ setAdditionalItems()

void QgsMapLayerModel::setAdditionalItems ( const QStringList & items )

Sets a list of additional (non map layer) items to include at the end of the model.

These may represent additional layers such as layers which are not included in the map layer registry, or paths to layers which have not yet been loaded into QGIS.

See also: additionalItems()

Since: QGIS 3.0

Definition at line 138 of file qgsmaplayermodel.cpp.

◆ setAllowEmptyLayer()

void QgsMapLayerModel::setAllowEmptyLayer	(	bool	allowEmpty,
		const QString &	text = `QString()`,
		const QIcon &	icon = `QIcon()`
	)

Sets whether an optional empty layer ("not set") option is present in the model.

Since QGIS 3.20, the optional text and icon arguments allows the text and icon for the empty layer item to be set.

See also: allowEmptyLayer()

Since: QGIS 3.0

Definition at line 67 of file qgsmaplayermodel.cpp.

◆ setData()

bool QgsMapLayerModel::setData	(	const QModelIndex &	index,
		const QVariant &	value,
		int	role = `Qt::EditRole`
	)

override

Definition at line 522 of file qgsmaplayermodel.cpp.

◆ setItemsCanBeReordered()

void QgsMapLayerModel::setItemsCanBeReordered ( bool allow )

Sets whether items in the model can be reordered via drag and drop.

See also: itemsCanBeReordered()

Since: QGIS 3.14

Definition at line 47 of file qgsmaplayermodel.cpp.

◆ setItemsCheckable()

void QgsMapLayerModel::setItemsCheckable ( bool checkable )

setItemsCheckable defines if layers should be selectable in the widget

Definition at line 42 of file qgsmaplayermodel.cpp.

◆ setLayersChecked()

void QgsMapLayerModel::setLayersChecked ( const QList< QgsMapLayer * > & layers )

Sets which layers are checked in the model.

Definition at line 111 of file qgsmaplayermodel.cpp.

◆ setShowCrs()

void QgsMapLayerModel::setShowCrs ( bool showCrs )

Sets whether the CRS of layers is also included in the model's display role.

See also: showCrs()

Since: QGIS 3.0

Definition at line 88 of file qgsmaplayermodel.cpp.

◆ showCrs()

bool QgsMapLayerModel::showCrs ( ) const

inline

Returns true if the model includes layer's CRS in the display role.

See also: setShowCrs()

Since: QGIS 3.0

Definition at line 129 of file qgsmaplayermodel.h.

◆ supportedDropActions()

Qt::DropActions QgsMapLayerModel::supportedDropActions ( ) const

override

Definition at line 512 of file qgsmaplayermodel.cpp.

Member Data Documentation

◆ mCanReorder

bool QgsMapLayerModel::mCanReorder = false

protected

Definition at line 210 of file qgsmaplayermodel.h.

◆ mItemCheckable

bool QgsMapLayerModel::mItemCheckable = false

protected

Definition at line 209 of file qgsmaplayermodel.h.

◆ mLayers

QList<QgsMapLayer *> QgsMapLayerModel::mLayers

protected

Definition at line 207 of file qgsmaplayermodel.h.

◆ mLayersChecked

QMap<QString, Qt::CheckState> QgsMapLayerModel::mLayersChecked

protected

Definition at line 208 of file qgsmaplayermodel.h.

◆ mProject

QgsProject* QgsMapLayerModel::mProject = nullptr

protected

Definition at line 212 of file qgsmaplayermodel.h.

Property Documentation

◆ additionalItems

QStringList QgsMapLayerModel::additionalItems

readwrite

Definition at line 1 of file qgsmaplayermodel.h.

◆ allowEmptyLayer

bool QgsMapLayerModel::allowEmptyLayer

readwrite

Definition at line 1 of file qgsmaplayermodel.h.

◆ itemsCheckable

bool QgsMapLayerModel::itemsCheckable

readwrite

Definition at line 1 of file qgsmaplayermodel.h.

◆ showCrs

bool QgsMapLayerModel::showCrs

readwrite

Definition at line 1 of file qgsmaplayermodel.h.

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

/build/qgis-3.20.0+99unstable/src/core/qgsmaplayermodel.h
/build/qgis-3.20.0+99unstable/src/core/qgsmaplayermodel.cpp

Public Types

Public Member Functions

Static Public Member Functions

Protected Slots

Protected Attributes

Properties

Detailed Description

Member Enumeration Documentation

◆ ItemDataRole

Constructor & Destructor Documentation

◆ QgsMapLayerModel() [1/2]

◆ QgsMapLayerModel() [2/2]

Member Function Documentation

◆ additionalItems()

◆ addLayers

◆ allowEmptyLayer()

◆ canDropMimeData()

◆ checkAll()

◆ columnCount()

◆ data()

◆ dropMimeData()

◆ flags()

◆ iconForLayer()

◆ index()

◆ indexFromLayer()

◆ insertRows()

◆ itemsCanBeReordered()

◆ itemsCheckable()

◆ layerFromIndex()

◆ layersChecked()

◆ mimeData()

◆ mimeTypes()

◆ parent()

◆ removeLayers

◆ removeRows()

◆ roleNames()

◆ rowCount()

◆ setAdditionalItems()

◆ setAllowEmptyLayer()

◆ setData()

◆ setItemsCanBeReordered()

◆ setItemsCheckable()

◆ setLayersChecked()

◆ setShowCrs()

◆ showCrs()

◆ supportedDropActions()

Member Data Documentation

◆ mCanReorder

◆ mItemCheckable

◆ mLayers

◆ mLayersChecked

◆ mProject

Property Documentation

◆ additionalItems

◆ allowEmptyLayer

◆ itemsCheckable

◆ showCrs