A QAbstractItemModel subclass for displaying a QgsSymbol in a tree view in the symbology panel. More...

#include <qgssymbollayermodel.h>

Inheritance diagram for QgsSymbolLayerModel:

Public Member Functions
	QgsSymbolLayerModel (QgsVectorLayer vl, QObject parent=nullptr, QScreen *screen=nullptr)
	Constructor for QgsSymbolLayerModel, with the specified parent object.
QgsSymbolLayerModelNode *	addLayer (QModelIndex index)
	Adds the symbol layer node inserted right before the idx.
void	changeLayer (QgsSymbolLayerModelNode node, QgsSymbolLayer newLayer)
	Change the symbol layer associated with node by a newLayer symbol layer.
int	columnCount (const QModelIndex &=QModelIndex()) const override
QVariant	data (const QModelIndex &index, int role) const override
QgsSymbolLayerModelNode *	duplicateLayer (QgsSymbolLayerModelNode *node)
	Duplicates the symbol layer node in the parent node hierarchy.
Qt::ItemFlags	flags (const QModelIndex &index) const override
QModelIndex	index (int row, int column, const QModelIndex &parent=QModelIndex()) const override
QgsSymbolLayerModelNode *	index2node (const QModelIndex &index) const
	Returns the model node corresponding to the given index.
void	moveLayerByOffset (QgsSymbolLayerModelNode *node, int offset)
	Moves the symbol layer node by the offset in the parent hierarchy.
QModelIndex	node2index (QgsSymbolLayerModelNode *node) const
	Returns the model index corresponding to the given node.
QModelIndex	parent (const QModelIndex &child) const override
void	removeLayer (QgsSymbolLayerModelNode *node)
	Removes the symbol layer node from it's parent node hierarchy.
QgsSymbolLayerModelNode *	rootNode () const
	Returns the root node of the model.
int	rowCount (const QModelIndex &parent=QModelIndex()) const override
bool	setData (const QModelIndex &index, const QVariant &value, int role) override
void	setScreen (QScreen *screen)
	Set the QScreen of the model itself.
void	setSymbol (QgsSymbol *symbol)
	Sets the symbol associated with the model.
void	updateNode (QgsSymbol symbol, QgsSymbolLayerModelNode parent)
	Updates the descendants of the given parent node with the given symbol.
void	updatePreviewIcons (QgsSymbolLayerModelNode *node)
	Updates the preview icon of the given node.

Friends
class	TestQgsSymbolLayerModel

Detailed Description

A QAbstractItemModel subclass for displaying a QgsSymbol in a tree view in the symbology panel.

Warning: Not part of stable API and may change in future QGIS releases.

Since: QGIS 4.4

Definition at line 170 of file qgssymbollayermodel.h.

Constructor & Destructor Documentation

◆ QgsSymbolLayerModel()

QgsSymbolLayerModel::QgsSymbolLayerModel	(	QgsVectorLayer *	vl,
		QObject *	parent = nullptr,
		QScreen *	screen = nullptr )

Constructor for QgsSymbolLayerModel, with the specified parent object.

Definition at line 255 of file qgssymbollayermodel.cpp.

Member Function Documentation

◆ addLayer()

QgsSymbolLayerModelNode * QgsSymbolLayerModel::addLayer ( QModelIndex index )

Adds the symbol layer node inserted right before the idx.

Definition at line 478 of file qgssymbollayermodel.cpp.

◆ changeLayer()

void QgsSymbolLayerModel::changeLayer	(	QgsSymbolLayerModelNode *	node,
		QgsSymbolLayer *	newLayer )

Change the symbol layer associated with node by a newLayer symbol layer.

Definition at line 548 of file qgssymbollayermodel.cpp.

◆ columnCount()

int QgsSymbolLayerModel::columnCount ( const QModelIndex & = QModelIndex() ) const

override

Definition at line 329 of file qgssymbollayermodel.cpp.

◆ data()

QVariant QgsSymbolLayerModel::data	(	const QModelIndex &	index,
		int	role ) const

override

Definition at line 282 of file qgssymbollayermodel.cpp.

◆ duplicateLayer()

QgsSymbolLayerModelNode * QgsSymbolLayerModel::duplicateLayer ( QgsSymbolLayerModelNode * node )

Duplicates the symbol layer node in the parent node hierarchy.

Definition at line 439 of file qgssymbollayermodel.cpp.

◆ flags()

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

override

Definition at line 262 of file qgssymbollayermodel.cpp.

◆ index()

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

override

Definition at line 334 of file qgssymbollayermodel.cpp.

◆ index2node()

QgsSymbolLayerModelNode * QgsSymbolLayerModel::index2node ( const QModelIndex & index ) const

Returns the model node corresponding to the given index.

Returns the rootNode() for an invalid index.

See also: node2index(); rootNode()

Definition at line 376 of file qgssymbollayermodel.cpp.

◆ moveLayerByOffset()

void QgsSymbolLayerModel::moveLayerByOffset	(	QgsSymbolLayerModelNode *	node,
		int	offset )

Moves the symbol layer node by the offset in the parent hierarchy.

Definition at line 418 of file qgssymbollayermodel.cpp.

◆ node2index()

QModelIndex QgsSymbolLayerModel::node2index ( QgsSymbolLayerModelNode * node ) const

Returns the model index corresponding to the given node.

See also: index2node()

Definition at line 384 of file qgssymbollayermodel.cpp.

◆ parent()

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

override

Definition at line 346 of file qgssymbollayermodel.cpp.

◆ removeLayer()

void QgsSymbolLayerModel::removeLayer ( QgsSymbolLayerModelNode * node )

Removes the symbol layer node from it's parent node hierarchy.

Definition at line 529 of file qgssymbollayermodel.cpp.

◆ rootNode()

QgsSymbolLayerModelNode * QgsSymbolLayerModel::rootNode ( ) const

inline

Returns the root node of the model.

Definition at line 254 of file qgssymbollayermodel.h.

◆ rowCount()

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

override

Definition at line 320 of file qgssymbollayermodel.cpp.

◆ setData()

bool QgsSymbolLayerModel::setData	(	const QModelIndex &	index,
		const QVariant &	value,
		int	role )

override

Definition at line 294 of file qgssymbollayermodel.cpp.

◆ setScreen()

void QgsSymbolLayerModel::setScreen ( QScreen * screen )

Set the QScreen of the model itself.

And traverses all the nodes in the model to set their QScreen and update their preview icons.

Used to determine the icon size on different dpi monitors.

Definition at line 596 of file qgssymbollayermodel.cpp.

◆ setSymbol()

void QgsSymbolLayerModel::setSymbol ( QgsSymbol * symbol )

Sets the symbol associated with the model.

Note: The ownership of the symbol is not transferred and must exist for the lifetime of the model.

Definition at line 586 of file qgssymbollayermodel.cpp.

◆ updateNode()

void QgsSymbolLayerModel::updateNode	(	QgsSymbol *	symbol,
		QgsSymbolLayerModelNode *	parent )

Updates the descendants of the given parent node with the given symbol.

Definition at line 404 of file qgssymbollayermodel.cpp.

◆ updatePreviewIcons()

void QgsSymbolLayerModel::updatePreviewIcons ( QgsSymbolLayerModelNode * node )

Updates the preview icon of the given node.

And recursively updates the parents of the node.

Definition at line 572 of file qgssymbollayermodel.cpp.

◆ TestQgsSymbolLayerModel

friend class TestQgsSymbolLayerModel

friend

Definition at line 270 of file qgssymbollayermodel.h.

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

/build/qgis-4.3.0+git20261003+901db8dfa85+99sid/src/gui/symbology/qgssymbollayermodel.h
/build/qgis-4.3.0+git20261003+901db8dfa85+99sid/src/gui/symbology/qgssymbollayermodel.cpp

Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

◆ QgsSymbolLayerModel()

Member Function Documentation

◆ addLayer()

◆ changeLayer()

◆ columnCount()

◆ data()

◆ duplicateLayer()

◆ flags()

◆ index()

◆ index2node()

◆ moveLayerByOffset()

◆ node2index()

◆ parent()

◆ removeLayer()

◆ rootNode()

◆ rowCount()

◆ setData()

◆ setScreen()

◆ setSymbol()

◆ updateNode()

◆ updatePreviewIcons()

Friends And Related Symbol Documentation

◆ TestQgsSymbolLayerModel