Produces legend node with a marker symbol. More...

#include <qgslayertreemodellegendnode.h>

Inheritance diagram for QgsDataDefinedSizeLegendNode:

Public Member Functions
	QgsDataDefinedSizeLegendNode (QgsLayerTreeLayer nodeLayer, const QgsDataDefinedSizeLegend &settings, QObject parent=nullptr)
	Construct the node using QgsDataDefinedSizeLegend as definition of the node's appearance.

	~QgsDataDefinedSizeLegendNode () override

QVariant	data (int role) const override
	Returns data associated with the item. Must be implemented in derived class.

ItemMetrics	draw (const QgsLegendSettings &settings, ItemContext *ctx) override
	Entry point called from QgsLegendRenderer to do the rendering.

Public Member Functions inherited from QgsLayerTreeModelLegendNode
virtual bool	columnBreak () const
	Returns whether a forced column break should occur before the node.

virtual QSizeF	drawSymbol (const QgsLegendSettings &settings, ItemContext *ctx, double itemHeight) const
	Draws symbol on the left side of the item.

virtual QSizeF	drawSymbolText (const QgsLegendSettings &settings, ItemContext *ctx, QSizeF symbolSize) const
	Draws label on the right side of the item.

virtual QJsonObject	exportSymbolToJson (const QgsLegendSettings &settings, const QgsRenderContext &context) const
	Adds a symbol in base64 string within a JSON object with the key "icon".

QJsonObject	exportToJson (const QgsLegendSettings &settings, const QgsRenderContext &context)
	Entry point called from QgsLegendRenderer to do the rendering in a JSON object.

virtual Qt::ItemFlags	flags () const
	Returns item flags associated with the item. Default implementation returns Qt::ItemIsEnabled.

virtual void	invalidateMapBasedData ()
	Notification from model that information from associated map view has changed.

virtual bool	isEmbeddedInParent () const

virtual bool	isScaleOK (double scale) const

QgsLayerTreeLayer *	layerNode () const
	Returns pointer to the parent layer node.

QgsLayerTreeModel *	model () const
	Returns pointer to model owning this legend node.

virtual void	setColumnBreak (bool breakBeforeNode)
	Sets whether a forced column break should occur before the node.

virtual bool	setData (const QVariant &value, int role)
	Sets some data associated with the item. Default implementation does nothing and returns `false`.

virtual void	setEmbeddedInParent (bool embedded)

virtual void	setUserLabel (const QString &userLabel)

virtual void	setUserPatchSize (QSizeF size)
	Sets the user (overridden) size for the legend node.

virtual QString	userLabel () const

virtual QSizeF	userPatchSize () const
	Returns the user (overridden) size for the legend node.

Additional Inherited Members
Public Types inherited from QgsLayerTreeModelLegendNode
enum	LegendNodeRoles { RuleKeyRole = Qt::UserRole , ParentRuleKeyRole , NodeTypeRole }
	Legend node data roles. More...

enum	NodeTypes { SimpleLegend , SymbolLegend , RasterSymbolLegend , ImageLegend , WmsLegend , DataDefinedSizeLegend , EmbeddedWidget , ColorRampLegend }
	Types of legend nodes. More...

Public Slots inherited from QgsLayerTreeModelLegendNode
void	checkAllItems ()
	Checks all checkable items belonging to the same layer as this node.

void	toggleAllItems ()
	Toggle all checkable items belonging to the same layer as this node.

void	uncheckAllItems ()
	Unchecks all checkable items belonging to the same layer as this node.

Signals inherited from QgsLayerTreeModelLegendNode
void	dataChanged ()
	Emitted on internal data change so the layer tree model can forward the signal to views.

void	sizeChanged ()
	Emitted when the size of this node changes.

Protected Member Functions inherited from QgsLayerTreeModelLegendNode
	QgsLayerTreeModelLegendNode (QgsLayerTreeLayer nodeL, QObject parent=nullptr)
	Construct the node with pointer to its parent layer node.

QgsRenderContext *	createTemporaryRenderContext () const
	Returns a temporary context or `nullptr` if legendMapViewData are not valid.

Protected Attributes inherited from QgsLayerTreeModelLegendNode
bool	mColumnBreakBeforeNode = false

bool	mEmbeddedInParent

QgsLayerTreeLayer *	mLayerNode = nullptr

QgsLegendPatchShape	mPatchShape

QString	mUserLabel

QSizeF	mUserSize

Detailed Description

Produces legend node with a marker symbol.

Since: QGIS 3.0

Definition at line 783 of file qgslayertreemodellegendnode.h.

Constructor & Destructor Documentation

◆ QgsDataDefinedSizeLegendNode()

QgsDataDefinedSizeLegendNode::QgsDataDefinedSizeLegendNode	(	QgsLayerTreeLayer *	nodeLayer,
		const QgsDataDefinedSizeLegend &	settings,
		QObject *	parent = `nullptr`
	)

Construct the node using QgsDataDefinedSizeLegend as definition of the node's appearance.

Definition at line 1459 of file qgslayertreemodellegendnode.cpp.

◆ ~QgsDataDefinedSizeLegendNode()

QgsDataDefinedSizeLegendNode::~QgsDataDefinedSizeLegendNode ( )

override

Definition at line 1465 of file qgslayertreemodellegendnode.cpp.

Member Function Documentation

◆ data()

QVariant QgsDataDefinedSizeLegendNode::data ( int role ) const

overridevirtual

Returns data associated with the item. Must be implemented in derived class.

Implements QgsLayerTreeModelLegendNode.

Definition at line 1470 of file qgslayertreemodellegendnode.cpp.

◆ draw()

QgsLayerTreeModelLegendNode::ItemMetrics QgsDataDefinedSizeLegendNode::draw	(	const QgsLegendSettings &	settings,
		QgsLayerTreeModelLegendNode::ItemContext *	ctx
	)

overridevirtual

Entry point called from QgsLegendRenderer to do the rendering.

Default implementation calls drawSymbol() and drawSymbolText() methods.

If ctx is nullptr, this is just first stage when preparing layout - without actual rendering.

Reimplemented from QgsLayerTreeModelLegendNode.

Definition at line 1489 of file qgslayertreemodellegendnode.cpp.

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

/build/qgis-3.34.0+99sid/src/core/layertree/qgslayertreemodellegendnode.h
/build/qgis-3.34.0+99sid/src/core/layertree/qgslayertreemodellegendnode.cpp

Public Member Functions