An abstract layout item that provides generic methods for node based shapes such as polygon or polylines. More...

#include <qgslayoutitemnodeitem.h>

Inheritance diagram for QgsLayoutNodesItem:

[legend]

Public Member Functions
bool	addNode (QPointF point, bool checkArea=true, double radius=10)
	Add a node in current shape.

QRectF	boundingRect () const override

void	deselectNode ()
	Deselects any selected nodes.

double	estimatedFrameBleed () const override
	Returns the estimated amount the item's frame bleeds outside the item's actual rectangle.

virtual bool	isValid () const =0
	Must be reimplemented in subclasses.

bool	moveNode (int index, QPointF node)
	Moves a node to a new position.

int	nodeAtPosition (QPointF point, bool searchInRadius=true, double radius=10) const
	Search for the nearest node in the shape within a maximal area.

bool	nodePosition (int index, QPointF &position) const
	Gets the position of a node in scene coordinates.

QPolygonF	nodes () const
	Returns the nodes the shape consists of.

int	nodesSize () const
	Returns the number of nodes in the shape.

bool	removeNode (int index)
	Remove a node with specified index from the shape.

int	selectedNode () const
	Returns the currently selected node, or -1 if no node is selected.

void	setDisplayNodes (bool display=true)
	Set whether the item's nodes should be displayed.

void	setNodes (const QPolygonF &nodes)
	Sets the nodes the shape consists of.

bool	setSelectedNode (int index)
	Selects a node by index.

Public Member Functions inherited from QgsLayoutItem
	QgsLayoutItem (QgsLayout *layout, bool manageZValue=true)
	Constructor for QgsLayoutItem, with the specified parent layout.

	~QgsLayoutItem () override

virtual bool	accept (QgsStyleEntityVisitorInterface *visitor) const
	Accepts the specified style entity visitor, causing it to visit all style entities associated with the layout item.

virtual void	attemptMove (const QgsLayoutPoint &point, bool useReferencePoint=true, bool includesFrame=false, int page=-1)
	Attempts to move the item to a specified point.

void	attemptMoveBy (double deltaX, double deltaY)
	Attempts to shift the item's position by a specified deltaX and deltaY, in layout units.

virtual void	attemptResize (const QgsLayoutSize &size, bool includesFrame=false)
	Attempts to resize the item to a specified target size.

void	attemptSetSceneRect (const QRectF &rect, bool includesFrame=false)
	Attempts to update the item's position and size to match the passed rect in layout coordinates.

QColor	backgroundColor (bool useDataDefined=true) const
	Returns the background color for this item.

void	beginCommand (const QString &commandText, UndoCommand command=UndoNone)
	Starts new undo command for this item.

QPainter::CompositionMode	blendMode () const
	Returns the item's composition blending mode.

void	cancelCommand ()
	Cancels the current item command and discards it.

virtual void	cleanup ()
	Called just before a batch of items are deleted, allowing them to run cleanup tasks.

virtual QgsGeometry	clipPath () const
	Returns the clipping path generated by this item, in layout coordinates.

virtual bool	containsAdvancedEffects () const
	Returns `true` if the item contains contents with blend modes or transparency effects which can only be reproduced by rastering the item.

QgsAbstractLayoutUndoCommand *	createCommand (const QString &text, int id, QUndoCommand *parent=nullptr) override
	Creates a new layout undo command with the specified text and parent.

QgsExpressionContext	createExpressionContext () const override
	This method needs to be reimplemented in all classes which implement this interface and return an expression context.

virtual QString	displayName () const
	Gets item display name.

void	endCommand ()
	Completes the current item command and push it onto the layout's undo stack.

bool	excludeFromExports () const
	Returns whether the item should be excluded from layout exports and prints.

virtual ExportLayerBehavior	exportLayerBehavior () const
	Returns the behavior of this item during exporting to layered exports (e.g.

virtual QgsLayoutItem::ExportLayerDetail	exportLayerDetails () const
	Returns the details for the specified current export layer.

virtual void	finalizeRestoreFromXml ()
	Called after all pending items have been restored from XML.

virtual QgsLayoutSize	fixedSize () const
	Returns the fixed size of the item, if applicable, or an empty size if item can be freely resized.

bool	frameEnabled () const
	Returns `true` if the item includes a frame.

Qt::PenJoinStyle	frameJoinStyle () const
	Returns the join style used for drawing the item's frame.

QColor	frameStrokeColor () const
	Returns the frame's stroke color.

QgsLayoutMeasurement	frameStrokeWidth () const
	Returns the frame's stroke width.

bool	hasBackground () const
	Returns `true` if the item has a background.

virtual QIcon	icon () const
	Returns the item's icon.

QString	id () const
	Returns the item's ID name.

bool	isGroupMember () const
	Returns `true` if the item is part of a QgsLayoutItemGroup group.

bool	isLocked () const
	Returns `true` if the item is locked, and cannot be interacted with using the mouse.

virtual bool	isRefreshing () const
	Returns `true` if the item is currently refreshing content in the background.

double	itemOpacity () const
	Returns the item's opacity.

double	itemRotation () const
	Returns the current rotation for the item, in degrees clockwise.

virtual QgsLayoutSize	minimumSize () const
	Returns the minimum allowed size of the item, if applicable, or an empty size if item can be freely resized.

virtual void	moveContent (double dx, double dy)
	Moves the content of the item, by a specified dx and dy in layout units.

virtual bool	nextExportPart ()
	Moves to the next export part for a multi-layered export item, during a multi-layered export.

virtual Q_DECL_DEPRECATED int	numberExportLayers () const
	Returns the number of layers that this item requires for exporting during layered exports (e.g.

int	page () const
	Returns the page the item is currently on, with the first page returning 0.

QPointF	pagePos () const
	Returns the item's position (in layout units) relative to the top left corner of its current page.

QgsLayoutPoint	pagePositionWithUnits () const
	Returns the item's position (in item units) relative to the top left corner of its current page.

void	paint (QPainter painter, const QStyleOptionGraphicsItem itemStyle, QWidget *pWidget) override
	Handles preparing a paint surface for the layout item and painting the item's content.

QgsLayoutItemGroup *	parentGroup () const
	Returns the item's parent group, if the item is part of a QgsLayoutItemGroup group.

QgsLayoutPoint	positionWithUnits () const
	Returns the item's current position, including units.

bool	readXml (const QDomElement &itemElement, const QDomDocument &document, const QgsReadWriteContext &context)
	Sets the item state from a DOM element.

virtual QRectF	rectWithFrame () const
	Returns the item's rectangular bounds, including any bleed caused by the item's frame.

ReferencePoint	referencePoint () const
	Returns the reference point for positioning of the layout item.

virtual bool	requiresRasterization () const
	Returns `true` if the item is drawn in such a way that forces the whole layout to be rasterized when exporting to vector formats.

void	setBackgroundColor (const QColor &color)
	Sets the background color for this item.

void	setBackgroundEnabled (bool drawBackground)
	Sets whether this item has a background drawn under it or not.

void	setBlendMode (QPainter::CompositionMode mode)
	Sets the item's composition blending mode.

void	setExcludeFromExports (bool exclude)
	Sets whether the item should be excluded from layout exports and prints.

virtual void	setFrameEnabled (bool drawFrame)
	Sets whether this item has a frame drawn around it or not.

void	setFrameJoinStyle (Qt::PenJoinStyle style)
	Sets the join style used when drawing the item's frame.

void	setFrameStrokeColor (const QColor &color)
	Sets the frame stroke color.

virtual void	setFrameStrokeWidth (QgsLayoutMeasurement width)
	Sets the frame stroke width.

virtual void	setId (const QString &id)
	Set the item's id name.

void	setItemOpacity (double opacity)
	Sets the item's opacity.

void	setLocked (bool locked)
	Sets whether the item is locked, preventing mouse interactions with the item.

virtual void	setMoveContentPreviewOffset (double dx, double dy)
	Sets temporary offset for the item, by a specified dx and dy in layout units.

void	setParentGroup (QgsLayoutItemGroup *group)
	Sets the item's parent group.

void	setReferencePoint (ReferencePoint point)
	Sets the reference point for positioning of the layout item.

virtual void	setSelected (bool selected)
	Sets whether the item should be selected.

virtual void	setVisibility (bool visible)
	Sets whether the item is visible.

bool	shouldDrawItem () const
	Returns whether the item should be drawn in the current context.

QgsLayoutSize	sizeWithUnits () const
	Returns the item's current size, including units.

virtual void	startLayeredExport ()
	Starts a multi-layer export operation.

virtual void	stopLayeredExport ()
	Stops a multi-layer export operation.

int	type () const override
	Returns a unique graphics item type identifier.

virtual QString	uuid () const
	Returns the item identification string.

bool	writeXml (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context) const
	Stores the item state in a DOM element.

virtual void	zoomContent (double factor, QPointF point)
	Zooms content of item.

Public Member Functions inherited from QgsLayoutObject
	QgsLayoutObject (QgsLayout *layout)
	Constructor for QgsLayoutObject, with the specified parent layout.

QgsExpressionContext	createExpressionContext () const override
	Creates an expression context relating to the objects' current state.

QStringList	customProperties () const
	Returns list of keys stored in custom properties for the object.

QVariant	customProperty (const QString &key, const QVariant &defaultValue=QVariant()) const
	Read a custom property from the object.

QgsPropertyCollection &	dataDefinedProperties ()
	Returns a reference to the object's property collection, used for data defined overrides.

const QgsPropertyCollection &	dataDefinedProperties () const
	Returns a reference to the object's property collection, used for data defined overrides.

QgsLayout *	layout ()
	Returns the layout the object is attached to.

const QgsLayout *	layout () const
	Returns the layout the object is attached to.

void	removeCustomProperty (const QString &key)
	Remove a custom property from the object.

void	setCustomProperty (const QString &key, const QVariant &value)
	Set a custom property for the object.

void	setDataDefinedProperties (const QgsPropertyCollection &collection)
	Sets the objects's property collection, used for data defined overrides.

Public Member Functions inherited from QgsExpressionContextGenerator
virtual	~QgsExpressionContextGenerator ()=default

Public Member Functions inherited from QgsLayoutUndoObjectInterface
virtual	~QgsLayoutUndoObjectInterface ()=default

Protected Slots
virtual void	updateBoundingRect ()
	Called when the bounding rect of the item should recalculated.

Protected Member Functions
	QgsLayoutNodesItem (const QPolygonF &polygon, QgsLayout *layout)
	Constructor for a QgsLayoutNodesItem with the given polygon nodes, attached to the specified layout.

	QgsLayoutNodesItem (QgsLayout *layout)
	Constructor for QgsLayoutNodesItem, attached to the specified layout.

virtual bool	_addNode (int nodeIndex, QPointF newNode, double radius)=0
	Method called in addNode.

virtual void	_draw (QgsLayoutItemRenderContext &context, const QStyleOptionGraphicsItem *itemStyle=nullptr)=0
	Method called in paint.

virtual void	_readXmlStyle (const QDomElement &elmt, const QgsReadWriteContext &context)=0
	Method called in readXml.

virtual bool	_removeNode (int nodeIndex)=0
	Method called in removeNode.

virtual void	_writeXmlStyle (QDomDocument &doc, QDomElement &elmt, const QgsReadWriteContext &context) const =0
	Method called in writeXml.

double	computeDistance (QPointF pt1, QPointF pt2) const
	Compute an euclidean distance between 2 nodes.

void	draw (QgsLayoutItemRenderContext &context) override
	Draws the item's contents using the specified item render context.

QgsLayoutItem::Flags	itemFlags () const override
	Returns the item's flags, which indicate how the item behaves.

bool	readPropertiesFromElement (const QDomElement &element, const QDomDocument &document, const QgsReadWriteContext &context) override
	Sets item state from a DOM element.

void	rescaleToFitBoundingBox ()
	Rescale the current shape according to the item's bounding box.

void	updateSceneRect ()
	Update the current scene rectangle for this item.

bool	writePropertiesToElement (QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context) const override
	Stores item state within an XML DOM element.

Protected Member Functions inherited from QgsLayoutItem
QPointF	adjustPointForReferencePosition (QPointF point, QSizeF size, ReferencePoint reference) const
	Adjusts the specified point at which a reference position of the item sits and returns the top left corner of the item, if reference point were placed at the specified position.

QgsLayoutSize	applyDataDefinedSize (const QgsLayoutSize &size)
	Applies any present data defined size overrides to the specified layout size.

virtual QSizeF	applyItemSizeConstraint (QSizeF targetSize)
	Applies any item-specific size constraint handling to a given targetSize in layout units.

virtual void	drawBackground (QgsRenderContext &context)
	Draws the background for the item.

virtual void	drawDebugRect (QPainter *painter)
	Draws a debugging rectangle of the item's current bounds within the specified painter.

virtual void	drawFrame (QgsRenderContext &context)
	Draws the frame around the item.

void	drawRefreshingOverlay (QPainter painter, const QStyleOptionGraphicsItem itemStyle)
	Draws a "refreshing" overlay icon on the item.

virtual QPainterPath	framePath () const
	Returns the path to use when drawing the item's frame or background.

QPointF	positionAtReferencePoint (ReferencePoint reference) const
	Returns the current position (in layout units) of a reference point for the item.

void	refreshBackgroundColor (bool updateItem=true)
	Refresh item's background color, considering data defined colors.

void	refreshBlendMode ()
	Refresh item's blend mode, considering data defined blend mode.

void	refreshFrame (bool updateItem=true)
	Refresh item's frame, considering data defined colors and frame size.

void	refreshItemPosition ()
	Refreshes an item's position by rechecking it against any possible overrides such as data defined positioning.

void	refreshItemRotation (QPointF *origin=nullptr)
	Refreshes an item's rotation by rechecking it against any possible overrides such as data defined rotation.

void	refreshItemSize ()
	Refreshes an item's size by rechecking it against any possible item fixed or minimum sizes.

void	refreshOpacity (bool updateItem=true)
	Refresh item's opacity, considering data defined opacity.

virtual void	setFixedSize (const QgsLayoutSize &size)
	Sets a fixed size for the layout item, which prevents it from being freely resized.

virtual void	setMinimumSize (const QgsLayoutSize &size)
	Sets the minimum allowed size for the layout item.

QgsLayoutPoint	topLeftToReferencePoint (const QgsLayoutPoint &point) const
	Returns the position for the reference point of the item, if the top-left of the item was placed at the specified point.

Protected Member Functions inherited from QgsLayoutObject
bool	readObjectPropertiesFromElement (const QDomElement &parentElement, const QDomDocument &document, const QgsReadWriteContext &context)
	Sets object properties from a DOM element.

bool	writeObjectPropertiesToElement (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context) const
	Stores object properties within an XML DOM element.

Protected Attributes
QRectF	mCurrentRectangle
	Current bounding rectangle of shape.

double	mMaxSymbolBleed = 0.0
	Max symbol bleed.

QPolygonF	mPolygon
	Shape's nodes.

Protected Attributes inherited from QgsLayoutObject
QgsObjectCustomProperties	mCustomProperties
	Custom properties for object.

QgsPropertyCollection	mDataDefinedProperties

QPointer< QgsLayout >	mLayout

Additional Inherited Members
Public Types inherited from QgsLayoutItem
enum	ExportLayerBehavior { CanGroupWithAnyOtherItem , CanGroupWithItemsOfSameType , MustPlaceInOwnLayer , ItemContainsSubLayers }
	Behavior of item when exporting to layered outputs. More...

enum	Flag { FlagOverridesPaint = 1 << 1 , FlagProvidesClipPath = 1 << 2 , FlagDisableSceneCaching = 1 << 3 }
	Flags for controlling how an item behaves. More...

typedef QFlags< Flag >	Flags

enum	ReferencePoint { UpperLeft , UpperMiddle , UpperRight , MiddleLeft , Middle , MiddleRight , LowerLeft , LowerMiddle , LowerRight }
	Fixed position reference point. More...

enum	UndoCommand { UndoNone = -1 , UndoIncrementalMove = 1 , UndoIncrementalResize , UndoStrokeColor , UndoStrokeWidth , UndoBackgroundColor , UndoOpacity , UndoMarginLeft , UndoMarginTop , UndoMarginBottom , UndoMarginRight , UndoSetId , UndoRotation , UndoExportLayerName , UndoShapeStyle , UndoShapeCornerRadius , UndoNodeMove , UndoAtlasMargin , UndoMapRotation , UndoZoomContent , UndoOverviewStyle , UndoGridFramePenColor , UndoMapGridFrameFill1Color , UndoMapGridFrameFill2Color , UndoMapAnnotationDistance , UndoMapGridAnnotationFontColor , UndoMapGridLineSymbol , UndoMapGridMarkerSymbol , UndoMapGridIntervalRange , UndoMapLabelMargin , UndoPictureRotation , UndoPictureFillColor , UndoPictureStrokeColor , UndoPictureStrokeWidth , UndoPictureNorthOffset , UndoLabelText , UndoLabelFont , UndoLabelMargin , UndoLabelFontColor , UndoLegendText , UndoLegendColumnCount , UndoLegendSymbolWidth , UndoLegendSymbolHeight , UndoLegendMaxSymbolSize , UndoLegendMinSymbolSize , UndoLegendWmsLegendWidth , UndoLegendWmsLegendHeight , UndoLegendTitleSpaceBottom , UndoLegendGroupSpace , UndoLegendGroupIndent , UndoLegendSubgroupIndent , UndoLegendLayerSpace , UndoLegendSymbolSpace , UndoLegendIconSymbolSpace , UndoLegendFontColor , UndoLegendBoxSpace , UndoLegendColumnSpace , UndoLegendLineSpacing , UndoLegendRasterStrokeWidth , UndoLegendRasterStrokeColor , UndoLegendTitleFont , UndoLegendGroupFont , UndoLegendLayerFont , UndoLegendItemFont , UndoScaleBarLineWidth , UndoScaleBarSegmentSize , UndoScaleBarSegmentsLeft , UndoScaleBarSegments , UndoScaleBarHeight , UndoScaleBarSubdivisions , UndoScaleBarSubdivisionsHeight , UndoScaleBarFontColor , UndoScaleBarFillColor , UndoScaleBarFillColor2 , UndoScaleBarStrokeColor , UndoScaleBarUnitText , UndoScaleBarMapUnitsSegment , UndoScaleBarLabelBarSize , UndoScaleBarBoxContentSpace , UndoArrowStrokeWidth , UndoArrowHeadWidth , UndoArrowHeadFillColor , UndoArrowHeadStrokeColor , UndoElevationProfileTolerance , UndoElevationProfileChartBackground , UndoElevationProfileChartBorder , UndoElevationProfileDistanceMajorGridlines , UndoElevationProfileDistanceMinorGridlines , UndoElevationProfileDistanceFormat , UndoElevationProfileDistanceFont , UndoElevationProfileDistanceLabels , UndoElevationProfileElevationMajorGridlines , UndoElevationProfileElevationMinorGridlines , UndoElevationProfileElevationFormat , UndoElevationProfileElevationFont , UndoElevationProfileElevationLabels , UndoElevationProfileMinimumDistance , UndoElevationProfileMaximumDistance , UndoElevationProfileMinimumElevation , UndoElevationProfileMaximumElevation , UndoCustomCommand }
	Layout item undo commands, used for collapsing undo commands. More...

Public Types inherited from QgsLayoutObject
enum class	DataDefinedProperty : int { NoProperty = 0 , AllProperties , TestProperty , PresetPaperSize , PaperWidth , PaperHeight , NumPages , PaperOrientation , PageNumber , PositionX , PositionY , ItemWidth , ItemHeight , ItemRotation , Transparency , Opacity , BlendMode , ExcludeFromExports , FrameColor , BackgroundColor , MarginLeft , MarginTop , MarginRight , MarginBottom , MapRotation , MapScale , MapXMin , MapYMin , MapXMax , MapYMax , MapAtlasMargin , MapLayers , MapStylePreset , MapLabelMargin , MapGridEnabled , MapGridIntervalX , MapGridIntervalY , MapGridOffsetX , MapGridOffsetY , MapGridFrameSize , MapGridFrameMargin , MapGridLabelDistance , MapGridCrossSize , MapGridFrameLineThickness , MapGridAnnotationDisplayLeft , MapGridAnnotationDisplayRight , MapGridAnnotationDisplayTop , MapGridAnnotationDisplayBottom , MapGridFrameDivisionsLeft , MapGridFrameDivisionsRight , MapGridFrameDivisionsTop , MapGridFrameDivisionsBottom , MapCrs , StartDateTime , EndDateTime , MapZRangeLower , MapZRangeUpper , PictureSource , PictureSvgBackgroundColor , PictureSvgStrokeColor , PictureSvgStrokeWidth , SourceUrl , LegendTitle , LegendColumnCount , ScalebarLeftSegments , ScalebarRightSegments , ScalebarSegmentWidth , ScalebarMinimumWidth , ScalebarMaximumWidth , ScalebarHeight , ScalebarRightSegmentSubdivisions , ScalebarSubdivisionHeight , ScalebarFillColor , ScalebarFillColor2 , ScalebarLineColor , ScalebarLineWidth , AttributeTableSourceLayer , ElevationProfileTolerance , ElevationProfileDistanceMajorInterval , ElevationProfileDistanceMinorInterval , ElevationProfileDistanceLabelInterval , ElevationProfileElevationMajorInterval , ElevationProfileElevationMinorInterval , ElevationProfileElevationLabelInterval , ElevationProfileMinimumDistance , ElevationProfileMaximumDistance , ElevationProfileMinimumElevation , ElevationProfileMaximumElevation }
	Data defined properties for different item types. More...

enum	PropertyValueType { EvaluatedValue = 0 , OriginalValue }
	Specifies whether the value returned by a function should be the original, user set value, or the current evaluated value for the property. More...

Public Slots inherited from QgsLayoutItem
virtual void	invalidateCache ()
	Forces a deferred update of any cached image the item uses.

virtual void	redraw ()
	Triggers a redraw (update) of the item.

void	refresh () override
	Refreshes the item, causing a recalculation of any property overrides and recalculation of its position and size.

virtual void	refreshDataDefinedProperty (QgsLayoutObject::DataDefinedProperty property=QgsLayoutObject::DataDefinedProperty::AllProperties)
	Refreshes a data defined property for the item by reevaluating the property's value and redrawing the item with this new value.

virtual void	rotateItem (double angle, QPointF transformOrigin)
	Rotates the item by a specified angle in degrees clockwise around a specified reference point.

virtual void	setItemRotation (double rotation, bool adjustPosition=true)
	Sets the layout item's rotation, in degrees clockwise.

Public Slots inherited from QgsLayoutObject
virtual void	refresh ()
	Refreshes the object, causing a recalculation of any property overrides.

Signals inherited from QgsLayoutItem
void	backgroundTaskCountChanged (int count)
	Emitted whenever the number of background tasks an item is executing changes.

void	clipPathChanged ()
	Emitted when the item's clipping path has changed.

void	frameChanged ()
	Emitted if the item's frame style changes.

void	lockChanged ()
	Emitted if the item's lock status changes.

void	rotationChanged (double newRotation)
	Emitted on item rotation change.

void	sizePositionChanged ()
	Emitted when the item's size or position changes.

Signals inherited from QgsLayoutObject
void	changed ()
	Emitted when the object's properties change.

Static Public Member Functions inherited from QgsLayoutObject
static bool	propertyAssociatesWithParentMultiframe (DataDefinedProperty property)
	Returns `true` if the specified property key is normally associated with the parent QgsLayoutMultiFrame object instead of a child QgsLayoutFrame object.

static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the layout object property definitions.

Properties inherited from QgsLayoutItem
bool	locked

Detailed Description

An abstract layout item that provides generic methods for node based shapes such as polygon or polylines.

Definition at line 28 of file qgslayoutitemnodeitem.h.

Constructor & Destructor Documentation

◆ QgsLayoutNodesItem() [1/2]

QgsLayoutNodesItem::QgsLayoutNodesItem ( QgsLayout * layout )

protected

Constructor for QgsLayoutNodesItem, attached to the specified layout.

Definition at line 45 of file qgslayoutitemnodeitem.cpp.

◆ QgsLayoutNodesItem() [2/2]

QgsLayoutNodesItem::QgsLayoutNodesItem	(	const QPolygonF &	polygon,
		QgsLayout *	layout
	)

protected

Constructor for a QgsLayoutNodesItem with the given polygon nodes, attached to the specified layout.

Definition at line 51 of file qgslayoutitemnodeitem.cpp.

Member Function Documentation

◆ _addNode()

virtual bool QgsLayoutNodesItem::_addNode	(	int	nodeIndex,
		QPointF	newNode,
		double	radius
	)

protectedpure virtual

Method called in addNode.

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ _draw()

virtual void QgsLayoutNodesItem::_draw	(	QgsLayoutItemRenderContext &	context,
		const QStyleOptionGraphicsItem *	itemStyle = `nullptr`
	)

protectedpure virtual

Method called in paint.

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ _readXmlStyle()

virtual void QgsLayoutNodesItem::_readXmlStyle	(	const QDomElement &	elmt,
		const QgsReadWriteContext &	context
	)

protectedpure virtual

Method called in readXml.

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ _removeNode()

virtual bool QgsLayoutNodesItem::_removeNode ( int nodeIndex )

protectedpure virtual

Method called in removeNode.

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ _writeXmlStyle()

virtual void QgsLayoutNodesItem::_writeXmlStyle	(	QDomDocument &	doc,
		QDomElement &	elmt,
		const QgsReadWriteContext &	context
	)		const

protectedpure virtual

Method called in writeXml.

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ addNode()

bool QgsLayoutNodesItem::addNode	(	QPointF	point,
		bool	checkArea = `true`,
		double	radius = `10`
	)

Add a node in current shape.

Parameters

point	is the location of the new node (in scene coordinates)
checkArea	is a flag to indicate if there's a space constraint.
radius	is the space constraint and is used only if checkArea is `true`. Typically, if this flag is TRUE, the new node has to be nearer than radius to the shape to be added.

Definition at line 100 of file qgslayoutitemnodeitem.cpp.

◆ boundingRect()

QRectF QgsLayoutNodesItem::boundingRect ( ) const

override

Definition at line 35 of file qgslayoutitemnodeitem.cpp.

◆ computeDistance()

double QgsLayoutNodesItem::computeDistance	(	QPointF	pt1,
		QPointF	pt2
	)		const

protected

Compute an euclidean distance between 2 nodes.

Definition at line 94 of file qgslayoutitemnodeitem.cpp.

◆ deselectNode()

void QgsLayoutNodesItem::deselectNode ( )

inline

Deselects any selected nodes.

Definition at line 107 of file qgslayoutitemnodeitem.h.

◆ draw()

void QgsLayoutNodesItem::draw ( QgsLayoutItemRenderContext & context )

overrideprotectedvirtual

Draws the item's contents using the specified item render context.

Note that the context's painter has been scaled so that painter units are pixels. Use the QgsRenderContext methods to convert from millimeters or other units to the painter's units.

Implements QgsLayoutItem.

Definition at line 75 of file qgslayoutitemnodeitem.cpp.

◆ estimatedFrameBleed()

double QgsLayoutNodesItem::estimatedFrameBleed ( ) const

overridevirtual

Returns the estimated amount the item's frame bleeds outside the item's actual rectangle.

For instance, if the item has a 2mm frame stroke, then 1mm of this frame is drawn outside the item's rect. In this case the return value will be 1.0.

Returned values are in layout units.

See also: rectWithFrame()

Reimplemented from QgsLayoutItem.

Definition at line 40 of file qgslayoutitemnodeitem.cpp.

◆ isValid()

virtual bool QgsLayoutNodesItem::isValid ( ) const

pure virtual

Must be reimplemented in subclasses.

Typically a polyline is valid if it has at least 2 distinct nodes, while a polygon is valid if it has at least 3 distinct nodes.

Since: QGIS 3.40

Implemented in QgsLayoutItemPolygon, and QgsLayoutItemPolyline.

◆ itemFlags()

QgsLayoutItem::Flags QgsLayoutNodesItem::itemFlags ( ) const

overrideprotectedvirtual

Returns the item's flags, which indicate how the item behaves.

Since: QGIS 3.4.3

Reimplemented from QgsLayoutItem.

Definition at line 89 of file qgslayoutitemnodeitem.cpp.

◆ moveNode()

bool QgsLayoutNodesItem::moveNode	(	int	index,
		QPointF	node
	)

Moves a node to a new position.

Parameters

index	the index of the node to move
node	is the new position in scene coordinate

Definition at line 264 of file qgslayoutitemnodeitem.cpp.

◆ nodeAtPosition()

int QgsLayoutNodesItem::nodeAtPosition	(	QPointF	point,
		bool	searchInRadius = `true`,
		double	radius = `10`
	)		const

Search for the nearest node in the shape within a maximal area.

Returns the index of the nearest node or -1 if no node was found.

Parameters

point	is the location to search for nodes from (in scene coordinates)
searchInRadius	is a flag to indicate if the area of research is limited in space.
radius	is only used if searchInRadius is `true`

Definition at line 215 of file qgslayoutitemnodeitem.cpp.

◆ nodePosition()

bool QgsLayoutNodesItem::nodePosition	(	int	index,
		QPointF &	position
	)		const

Gets the position of a node in scene coordinates.

Parameters

index	of the node
position	the position of the node

Returns: true if the index is valid and the position is set, false otherwise

Definition at line 240 of file qgslayoutitemnodeitem.cpp.

◆ nodes()

QPolygonF QgsLayoutNodesItem::nodes ( ) const

inline

Returns the nodes the shape consists of.

See also: setNodes()

Definition at line 44 of file qgslayoutitemnodeitem.h.

◆ nodesSize()

int QgsLayoutNodesItem::nodesSize ( ) const

inline

Returns the number of nodes in the shape.

Definition at line 92 of file qgslayoutitemnodeitem.h.

◆ readPropertiesFromElement()

bool QgsLayoutNodesItem::readPropertiesFromElement	(	const QDomElement &	element,
		const QDomDocument &	document,
		const QgsReadWriteContext &	context
	)

overrideprotectedvirtual

Sets item state from a DOM element.

Parameters

element	is the DOM element for the item
document	DOM document
context	read write context

Note that item subclasses should not rely on all other items being present in the layout at the time this method is called. Instead, any connections and links to other items must be made in the finalizeRestoreFromXml() method. E.g. when restoring a scalebar, the connection to the linked map's signals should be implemented in finalizeRestoreFromXml(), not readPropertiesFromElement().

See also: writePropertiesToElement(); readXml()

Reimplemented from QgsLayoutItem.

Definition at line 280 of file qgslayoutitemnodeitem.cpp.

◆ removeNode()

bool QgsLayoutNodesItem::removeNode ( int index )

Remove a node with specified index from the shape.

Definition at line 253 of file qgslayoutitemnodeitem.cpp.

◆ rescaleToFitBoundingBox()

void QgsLayoutNodesItem::rescaleToFitBoundingBox ( )

protected

Rescale the current shape according to the item's bounding box.

Useful when the shape is resized thanks to the rubber band.

Definition at line 305 of file qgslayoutitemnodeitem.cpp.

◆ selectedNode()

int QgsLayoutNodesItem::selectedNode ( ) const

inline

Returns the currently selected node, or -1 if no node is selected.

Definition at line 102 of file qgslayoutitemnodeitem.h.

◆ setDisplayNodes()

void QgsLayoutNodesItem::setDisplayNodes ( bool display = true )

inline

Set whether the item's nodes should be displayed.

Definition at line 59 of file qgslayoutitemnodeitem.h.

◆ setNodes()

void QgsLayoutNodesItem::setNodes ( const QPolygonF & nodes )

Sets the nodes the shape consists of.

See also: nodes()

Definition at line 28 of file qgslayoutitemnodeitem.cpp.

◆ setSelectedNode()

bool QgsLayoutNodesItem::setSelectedNode ( int index )

Selects a node by index.

Definition at line 323 of file qgslayoutitemnodeitem.cpp.

◆ updateBoundingRect

void QgsLayoutNodesItem::updateBoundingRect ( )

protectedvirtualslot

Called when the bounding rect of the item should recalculated.

Subclasses should update currentRectangle in their implementations.

Definition at line 349 of file qgslayoutitemnodeitem.cpp.

◆ updateSceneRect()

void QgsLayoutNodesItem::updateSceneRect ( )

protected

Update the current scene rectangle for this item.

Definition at line 336 of file qgslayoutitemnodeitem.cpp.

◆ writePropertiesToElement()

bool QgsLayoutNodesItem::writePropertiesToElement	(	QDomElement &	element,
		QDomDocument &	document,
		const QgsReadWriteContext &	context
	)		const

overrideprotectedvirtual

Stores item state within an XML DOM element.

Parameters

element	is the DOM element to store the item's properties in
document	DOM document
context	read write context

See also: writeXml(); readPropertiesFromElement()

Reimplemented from QgsLayoutItem.

Definition at line 360 of file qgslayoutitemnodeitem.cpp.

Member Data Documentation

◆ mCurrentRectangle

QRectF QgsLayoutNodesItem::mCurrentRectangle

protected

Current bounding rectangle of shape.

Definition at line 176 of file qgslayoutitemnodeitem.h.

◆ mMaxSymbolBleed

double QgsLayoutNodesItem::mMaxSymbolBleed = 0.0

protected

Max symbol bleed.

Definition at line 146 of file qgslayoutitemnodeitem.h.

◆ mPolygon

QPolygonF QgsLayoutNodesItem::mPolygon

protected

Shape's nodes.

Definition at line 143 of file qgslayoutitemnodeitem.h.

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

/build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/layout/qgslayoutitemnodeitem.h
/build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/layout/qgslayoutitemnodeitem.cpp

Public Member Functions

Protected Slots

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsLayoutNodesItem() [1/2]

◆ QgsLayoutNodesItem() [2/2]

Member Function Documentation

◆ _addNode()

◆ _draw()

◆ _readXmlStyle()

◆ _removeNode()

◆ _writeXmlStyle()

◆ addNode()

◆ boundingRect()

◆ computeDistance()

◆ deselectNode()

◆ draw()

◆ estimatedFrameBleed()

◆ isValid()

◆ itemFlags()

◆ moveNode()

◆ nodeAtPosition()

◆ nodePosition()

◆ nodes()

◆ nodesSize()

◆ readPropertiesFromElement()

◆ removeNode()

◆ rescaleToFitBoundingBox()

◆ selectedNode()

◆ setDisplayNodes()

◆ setNodes()

◆ setSelectedNode()

◆ updateBoundingRect

◆ updateSceneRect()

◆ writePropertiesToElement()

Member Data Documentation

◆ mCurrentRectangle

◆ mMaxSymbolBleed

◆ mPolygon